1GZQ - JenaLib

Asym./Biol. Unit (Jmol Viewer)

Asym./Biol. Unit - sites (Jmol Viewer)

Title :   CD1B IN COMPLEX WITH PHOPHATIDYLINOSITOL

Authors :   S. D. Gadola, N. R. Zaccai, K. Harlos, D. Shepherd, G. Ritter, R. R. Schmidt, E. Y. Jones, V. Cerundolo

Date :   24 May 02 (Deposition) - 31 Jul 02 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.26

Chains :   Asym./Biol. Unit : A,B

Keywords :   Phophatidylinositol, Mhc, Glycoprotein, Antigen Presentation (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   S. D. Gadola, N. R. Zaccai, K. Harlos, D. Shepherd, J. C. Castro-Palomino, G. Ritter, R. R. Schmidt, E. Y. Jones, V. Cerundolo
Structure Of Human Cd1B With Bound Ligands At 2. 3 A, A Maze For Alkyl Chains
Nat. Immunol. V. 3 721 2002
PubMed-ID: 12118248 | Reference-DOI: 10.1038/NI821

Molecule 1 - T-CELL SURFACE GLYCOPROTEIN CD1B
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET23D
	Expression System Strain	:	BL21
	Expression System Taxid	:	511693
	Expression System Vector	:	PROKARYOTIC EXPRESSION SYSTEM
	Fragment	:	RESIDUES 18-295
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	CD1B ANTIGEN

Molecule 2 - B2-MICROGLOBULIN
	Chains	:	B
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Cell Line	:	BL21
	Expression System Plasmid	:	PET23D
	Expression System Taxid	:	511693
	Expression System Vector	:	PROKARYOTIC EXPRESSION SYSTEM
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606

		1	2
Asymmetric/Biological Unit	:	A	B

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (4, 6)

No.	Name	Count	Type	Full Name
1	D12	1	Ligand/Ion	DODECANE
2	NO3	3	Ligand/Ion	NITRATE ION
3	PII	1	Ligand/Ion	2-[(HYDROXY{[(2R,3R,5S,6R)-2,3,4,5,6-PENTAHYDROXYCYCLOHEXYL]OXY}PHOSPHORYL)OXY]-1-[(PALMITOYLOXY)METHYL]ETHYL HEPTADECANOATE
4	TWT	1	Ligand/Ion	DOCOSANE

Asymmetric Unit (6, 6)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	PRO A:7 , TYR A:212 , PRO A:213 , LYS A:214 , PRO A:215 , TRP A:243 , HOH A:2027	BINDING SITE FOR RESIDUE NO3 A1281
2	AC2	SOFTWARE	GLY A:233 , ASP A:234 , ARG A:246 , GLN B:8	BINDING SITE FOR RESIDUE NO3 A1282
3	AC3	SOFTWARE	LEU A:161 , THR A:165 , PII A:1280	BINDING SITE FOR RESIDUE NO3 A1283
4	AC4	SOFTWARE	ILE A:69 , VAL A:72 , TYR A:73 , ALA A:100 , VAL A:126 , ALA A:129 , CYS A:131 , GLY A:153 , MET A:155 , THR A:157 , ILE A:160 , LEU A:161 , NO3 A:1283 , TWT A:1285	BINDING SITE FOR RESIDUE PII A1280
5	AC5	SOFTWARE	GLU A:80 , PHE A:84 , MET A:90 , PHE A:144 , TYR A:151 , TWT A:1285	BINDING SITE FOR RESIDUE D12 A1284
6	AC6	SOFTWARE	VAL A:12 , GLN A:14 , TRP A:40 , PHE A:70 , PHE A:123 , PII A:1280 , D12 A:1284	BINDING SITE FOR RESIDUE TWT A1285

Asymmetric/Biological Unit

No.	Residues
1	A:102	-	A:166
2	A:131	-	A:145
3	A:206	-	A:261
4	B:25	-	B:80

Asymmetric/Biological Unit

No.	Residues
1	Tyr A:92	-	Pro A:93
2	Tyr A:212	-	Pro A:213
3	His B:31	-	Pro B:32

Asymmetric/Biological Unit (1, 1)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_076691	D	96	N	B2MG_HUMAN	Disease (AMYL8)	398122820	B	D	76	N

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Asymmetric/Biological Unit (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	IG_MHC	PS00290	Immunoglobulins and major histocompatibility complex proteins signature.	B2MG_GORGO	98-104	1	B:78-84
				B2MG_HUMAN	98-104	1	B:78-84
				B2MG_PANTR	98-104	1	B:78-84

Asymmetric/Biological Unit (8, 8)

	ENSEMBL					UniProtKB			PDB
No.	Transcript ID	Exon	Exon ID	Genome Location	Length	ID	Location	Length	Count	Location	Length
1.1a	ENSPTRT00000012956	1a	ENSPTRE00000370636	chr15:41860468-41860604	137	B2MG_PANTR	1-23	23	1	B:0-3	4
1.2a	ENSPTRT00000012956	2a	ENSPTRE00000238527	chr15:41864413-41864691	279	B2MG_PANTR	23-116	94	1	B:3-96	94
1.4	ENSPTRT00000012956	4	ENSPTRE00000238528	chr15:41865318-41865345	28	B2MG_PANTR	116-119	4	1	B:96-99	4
1.5	ENSPTRT00000012956	5	ENSPTRE00000070423	chr15:41866598-41867140	543	B2MG_PANTR	-	0	0	-	-

2.1	ENST00000368168	1	ENSE00001446457	chr1:158301321-158301153	169	CD1B_HUMAN	1-21	21	1	A:3-3	1
2.2a	ENST00000368168	2a	ENSE00001039203	chr1:158300852-158300586	267	CD1B_HUMAN	21-110	90	1	A:3-92	90
2.3	ENST00000368168	3	ENSE00001039193	chr1:158299920-158299642	279	CD1B_HUMAN	110-203	94	1	A:92-185	94
2.4b	ENST00000368168	4b	ENSE00001039201	chr1:158299438-158299160	279	CD1B_HUMAN	203-296	94	1	A:185-278	94
2.5	ENST00000368168	5	ENSE00001039199	chr1:158298804-158298711	94	CD1B_HUMAN	296-327	32	1	A:278-280 (gaps)	17
2.6a	ENST00000368168	6a	ENSE00001598880	chr1:158298047-158297741	307	CD1B_HUMAN	327-333	7	0	-	-

Asymmetric/Biological Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:278
 aligned with CD1B_HUMAN | P29016 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:292
                                    30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310  
           CD1B_HUMAN    21 AFQGPTSFHVIQTSSFTNSTWAQTQGSGWLDDLQIHGWDSDSGTAIFLKPWSKGNFSDKEVAELEEIFRVYIFGFAREVQDFAGDFQMKYPFEIQGIAGCELHSGGAIVSFLRGALGGLDFLSVKNASCVPSPEGGSRAQKFCALIIQYQGIMETVRILLYETCPRYLLGVLNAGKADLQRQVKPEAWLSSGPSPGPGRLQLVCHVSGFYPKPVWVMWMRGEQEQQGTQLGDILPNANWTWYLRATLDVADGEAAGLSCRVKHSSLEGQDIILYWRNPTSIGSIVLAIIVPS 312
               SCOP domains d1gzqa2 A:3-183 CD1, alpha-1 and alpha-2 domains                                                                                                                                     d1gzqa1 A:184-280 CD1, alpha-3 domain                                                                           SCOP domains
               CATH domains ----1gzqA01 A:7-182 Murine Class I Major Histocompatibility Complex, H2-DB, subunit A, domain 1                                                                                     1gzqA02 A:183-278 Immunoglobulins                                                               ---------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eeeeeeeeeeee..eeeeeeeeee..eeeeeee....eeee.........hhhhhhhhhhhhhhhhhhhhhhhhhhh........eeeeeeeeeee.....eeeeeeeee..eeeeeee..eeee...hhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.....eeeeee.......eeeeeeeeeee.....eeeeee..ee....ee...eee...eeeeeeeeeee.hhh..eeeeeehhhhh...eeee..--------------.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 2 (1) 2----------------------------------------------------------------------------------------Exon 2.3  PDB: A:92-185 UniProt: 110-203                                                      --------------------------------------------------------------------------------------------Exon 2.5          Transcript 2 (1)
           Transcript 2 (2) Exon 2.2a  PDB: A:3-92 UniProt: 21-110                                                    --------------------------------------------------------------------------------------------Exon 2.4b  PDB: A:185-278 UniProt: 203-296                                                    ---------------- Transcript 2 (2)
                 1gzq A   3 AFQGPTSFHVIQTSSFTNSTWAQTQGSGWLDDLQIHGWDSDSGTAIFLKPWSKGNFSDKEVAELEEIFRVYIFGFAREVQDFAGDFQMKYPFEIQGIAGCELHSGGAIVSFLRGALGGLDFLSVKNASCVPSPEGGSRAQKFCALIIQYQGIMETVRILLYETCPRYLLGVLNAGKADLQRQVKPEAWLSSGPSPGPGRLQLVCHVSGFYPKPVWVMWMRGEQEQQGTQLGDILPNANWTWYLRATLDVADGEAAGLSCRVKHSSLEGQDIILYWG--------------PG 280
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272     |   -         -| 
                                                                                                                                                                                                                                                                                                             278            279

Chain B from PDB  Type:PROTEIN  Length:100
 aligned with B2MG_GORGO | P61771 from UniProtKB/Swiss-Prot  Length:119

    Alignment length:100
                                    29        39        49        59        69        79        89        99       109       119
           B2MG_GORGO    20 AIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM 119
               SCOP domains d1gzqb_ B: beta2-microglobulin                                                                       SCOP domains
               CATH domains 1gzqB00 B:0-99 Immunoglobulins                                                                       CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eeeeee.........eeeeeeeeee.....eeeeee..ee....ee...ee.....eeeeeeeee.......eeeeee.......eeee..... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------N----------------------- SAPs(SNPs)
                PROSITE (2) ---------------------------------------------------------------------------------------------------- PROSITE (2)
                PROSITE (3) ------------------------------------------------------------------------------IG_MHC --------------- PROSITE (3)
                 Transcript ---------------------------------------------------------------------------------------------------- Transcript
                 1gzq B   0 MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM  99
                                     9        19        29        39        49        59        69        79        89        99

Chain B from PDB  Type:PROTEIN  Length:100
 aligned with B2MG_HUMAN | P61769 from UniProtKB/Swiss-Prot  Length:119

    Alignment length:100
                                    29        39        49        59        69        79        89        99       109       119
           B2MG_HUMAN    20 AIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM 119
               SCOP domains d1gzqb_ B: beta2-microglobulin                                                                       SCOP domains
               CATH domains 1gzqB00 B:0-99 Immunoglobulins                                                                       CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eeeeee.........eeeeeeeeee.....eeeeee..ee....ee...ee.....eeeeeeeee.......eeeeee.......eeee..... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------N----------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------IG_MHC --------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------- Transcript
                 1gzq B   0 MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM  99
                                     9        19        29        39        49        59        69        79        89        99

Chain B from PDB  Type:PROTEIN  Length:100
 aligned with B2MG_PANTR | P61770 from UniProtKB/Swiss-Prot  Length:119

    Alignment length:100
                                    29        39        49        59        69        79        89        99       109       119
           B2MG_PANTR    20 AIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM 119
               SCOP domains d1gzqb_ B: beta2-microglobulin                                                                       SCOP domains
               CATH domains 1gzqB00 B:0-99 Immunoglobulins                                                                       CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eeeeee.........eeeeeeeeee.....eeeeee..ee....ee...ee.....eeeeeeeee.......eeeeee.......eeee..... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------N----------------------- SAPs(SNPs)
                PROSITE (2) ------------------------------------------------------------------------------IG_MHC --------------- PROSITE (2)
           Transcript 1 (1) 1.1a--------------------------------------------------------------------------------------------1.4  Transcript 1 (1)
           Transcript 1 (2) ---Exon 1.2a  PDB: B:3-96 UniProt: 23-116                                                        --- Transcript 1 (2)
                 1gzq B   0 MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM  99
                                     9        19        29        39        49        59        69        79        89        99

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Asymmetric/Biological Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: 2-Layer Sandwich (8480)

Topology: Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 (402)

Homologous Superfamily: Murine Class I Major Histocompatibility Complex, H2-DB, subunit A, domain 1 (400)

Human (Homo sapiens) (249)

1gzqA01

A:7-182

Class: Mainly Beta (13760)

Architecture: Sandwich (5577)

Topology: Immunoglobulin-like (3897)

Homologous Superfamily: Immunoglobulins (2282)

Human (Homo sapiens) (912)

2a	1gzqB00	B:0-99
2b	1gzqA02	A:183-278

(no "Pfam Domain" information available for 1GZQ)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (CD1B_HUMAN | P29016)

molecular function
	GO:0030881	beta-2-microglobulin binding	Interacting selectively and non-covalently with beta-2-microglobulin.
	GO:0030883	endogenous lipid antigen binding	Interacting selectively and non-covalently with an endogenous cellular lipid antigen.
	GO:0030884	exogenous lipid antigen binding	Interacting selectively and non-covalently with an exogenous lipid antigen (examples include microbial lipids and glycolipids).
	GO:0071723	lipopeptide binding	Interacting selectively and non-covalently with a lipopeptide, any of a group of organic compounds comprising two or more amino acids linked by peptide bonds and containing a nonprotein group consisting of a lipid or lipids.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
	GO:0002250	adaptive immune response	An immune response mediated by cells expressing specific receptors for antigen produced through a somatic diversification process, and allowing for an enhanced secondary response to subsequent exposures to the same antigen (immunological memory).
	GO:0048007	antigen processing and presentation, exogenous lipid antigen via MHC class Ib	The process in which an antigen-presenting cell expresses lipid antigen of exogenous origin in association with an MHC class Ib protein complex on its cell surface. Class Ib here refers to non-classical class I molecules, such as those of the CD1 family.
	GO:0006955	immune response	Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
	GO:0002376	immune system process	Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
	GO:0050776	regulation of immune response	Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus.
cellular component
	GO:0009986	cell surface	The external part of the cell wall and/or plasma membrane.
	GO:0005768	endosome	A vacuole to which materials ingested by endocytosis are delivered.
	GO:0010008	endosome membrane	The lipid bilayer surrounding an endosome.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0005765	lysosomal membrane	The lipid bilayer surrounding the lysosome and separating its contents from the cell cytoplasm.
	GO:0005764	lysosome	A small lytic vacuole that has cell cycle-independent morphology and is found in most animal cells and that contains a variety of hydrolases, most of which have their maximal activities in the pH range 5-6. The contained enzymes display latency if properly isolated. About 40 different lysosomal hydrolases are known and lysosomes have a great variety of morphologies and functions.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain B (B2MG_GORGO | P61771)

biological process
	GO:0002474	antigen processing and presentation of peptide antigen via MHC class I	The process in which an antigen-presenting cell expresses a peptide antigen on its cell surface in association with an MHC class I protein complex. Class I here refers to classical class I molecules.
	GO:0006955	immune response	Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
	GO:0002376	immune system process	Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
cellular component
	GO:0042612	MHC class I protein complex	A transmembrane protein complex composed of a MHC class I alpha chain and an invariant beta2-microglobin chain, and with or without a bound peptide antigen. Class I here refers to classical class I molecules.
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

Chain B (B2MG_HUMAN | P61769)

molecular function
	GO:0042802	identical protein binding	Interacting selectively and non-covalently with an identical protein or proteins.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
	GO:0033077	T cell differentiation in thymus	The process in which a precursor cell type acquires the specialized features of a T cell via a differentiation pathway dependent upon transit through the thymus.
	GO:0019731	antibacterial humoral response	An immune response against bacteria mediated through a body fluid. Examples of this process are the antibacterial humoral responses in Mus musculus and Drosophila melanogaster.
	GO:0019885	antigen processing and presentation of endogenous peptide antigen via MHC class I	The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex. The peptide antigen is typically, but not always, processed from a whole protein. Class I here refers to classical class I molecules.
	GO:0002479	antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent	The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class I protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class I molecule. Class I here refers to classical class I molecules.
	GO:0002480	antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-independent	The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class I protein complex following intracellular transport via a pathway not requiring TAP (transporter associated with antigen processing). The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell. Class I here refers to classical class I molecules.
	GO:0002481	antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent	The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
	GO:0002474	antigen processing and presentation of peptide antigen via MHC class I	The process in which an antigen-presenting cell expresses a peptide antigen on its cell surface in association with an MHC class I protein complex. Class I here refers to classical class I molecules.
	GO:0044267	cellular protein metabolic process	The chemical reactions and pathways involving a specific protein, rather than of proteins in general, occurring at the level of an individual cell. Includes cellular protein modification.
	GO:0071281	cellular response to iron ion	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an iron ion stimulus.
	GO:0071222	cellular response to lipopolysaccharide	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a lipopolysaccharide stimulus; lipopolysaccharide is a major component of the cell wall of gram-negative bacteria.
	GO:0050829	defense response to Gram-negative bacterium	Reactions triggered in response to the presence of a Gram-negative bacterium that act to protect the cell or organism.
	GO:0050830	defense response to Gram-positive bacterium	Reactions triggered in response to the presence of a Gram-positive bacterium that act to protect the cell or organism.
	GO:0006955	immune response	Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
	GO:0002376	immune system process	Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
	GO:0045087	innate immune response	Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
	GO:0060333	interferon-gamma-mediated signaling pathway	A series of molecular signals initiated by the binding of interferon-gamma to a receptor on the surface of a cell, and ending with regulation of a downstream cellular process, e.g. transcription. Interferon gamma is the only member of the type II interferon found so far.
	GO:0055072	iron ion homeostasis	Any process involved in the maintenance of an internal steady state of iron ions within an organism or cell.
	GO:0010977	negative regulation of neuron projection development	Any process that decreases the rate, frequency or extent of neuron projection development. Neuron projection development is the process whose specific outcome is the progression of a neuron projection over time, from its formation to the mature structure. A neuron projection is any process extending from a neural cell, such as axons or dendrites (collectively called neurites).
	GO:1900121	negative regulation of receptor binding	Any process that stops, prevents or reduces the frequency, rate or extent of a protein or other molecule binding to a receptor.
	GO:0002726	positive regulation of T cell cytokine production	Any process that activates or increases the frequency, rate, or extent of T cell cytokine production.
	GO:0001916	positive regulation of T cell mediated cytotoxicity	Any process that activates or increases the frequency, rate or extent of T cell mediated cytotoxicity.
	GO:1904434	positive regulation of ferrous iron binding	Any process that activates or increases the frequency, rate or extent of ferrous iron binding.
	GO:0032092	positive regulation of protein binding	Any process that activates or increases the frequency, rate or extent of protein binding.
	GO:1900122	positive regulation of receptor binding	Any process that activates or increases the frequency, rate or extent of a protein or other molecule binding to a receptor.
	GO:0048260	positive regulation of receptor-mediated endocytosis	Any process that activates or increases the frequency, rate or extent of receptor mediated endocytosis, the uptake of external materials by cells, utilizing receptors to ensure specificity of transport.
	GO:1904437	positive regulation of transferrin receptor binding	Any process that activates or increases the frequency, rate or extent of transferrin receptor binding.
	GO:0042026	protein refolding	The process carried out by a cell that restores the biological activity of an unfolded or misfolded protein, using helper proteins such as chaperones.
	GO:0050690	regulation of defense response to virus by virus	Any viral process that modulates the frequency, rate, or extent of the antiviral response of the host cell or organism.
	GO:0050776	regulation of immune response	Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus.
	GO:0003254	regulation of membrane depolarization	Any process that modulates the rate, frequency or extent of membrane depolarization. Membrane depolarization is the process in which membrane potential changes in the depolarizing direction from the resting potential, usually from negative to positive.
	GO:0046686	response to cadmium ion	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a cadmium (Cd) ion stimulus.
	GO:0042493	response to drug	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
	GO:0002237	response to molecule of bacterial origin	Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus by molecules of bacterial origin such as peptides derived from bacterial flagellin.
	GO:0001895	retina homeostasis	A tissue homeostatic process involved in the maintenance of an internal equilibrium within the retina of the eye, including control of cellular proliferation and death and control of metabolic function.
cellular component
	GO:0012507	ER to Golgi transport vesicle membrane	The lipid bilayer surrounding a vesicle transporting substances from the endoplasmic reticulum to the Golgi.
	GO:0005794	Golgi apparatus	A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
	GO:0000139	Golgi membrane	The lipid bilayer surrounding any of the compartments of the Golgi apparatus.
	GO:1990712	HFE-transferrin receptor complex	A protein complex containing at least HFE and a transferrin receptor (either TFR1/TFRC or TFR2), proposed to play a role in the sensing of transferrin-bound Fe (Fe2-Tf) on the plasma membrane to regulate hepcidin transcription.
	GO:0042612	MHC class I protein complex	A transmembrane protein complex composed of a MHC class I alpha chain and an invariant beta2-microglobin chain, and with or without a bound peptide antigen. Class I here refers to classical class I molecules.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0031905	early endosome lumen	The volume enclosed by the membrane of an early endosome.
	GO:0031901	early endosome membrane	The lipid bilayer surrounding an early endosome.
	GO:0005788	endoplasmic reticulum lumen	The volume enclosed by the membranes of the endoplasmic reticulum.
	GO:0009897	external side of plasma membrane	The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
	GO:0070062	extracellular exosome	A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
	GO:0005615	extracellular space	That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
	GO:0005925	focal adhesion	Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0030670	phagocytic vesicle membrane	The lipid bilayer surrounding a phagocytic vesicle.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain B (B2MG_PANTR | P61770)

molecular function
	GO:0042802	identical protein binding	Interacting selectively and non-covalently with an identical protein or proteins.
biological process
	GO:0033077	T cell differentiation in thymus	The process in which a precursor cell type acquires the specialized features of a T cell via a differentiation pathway dependent upon transit through the thymus.
	GO:0019731	antibacterial humoral response	An immune response against bacteria mediated through a body fluid. Examples of this process are the antibacterial humoral responses in Mus musculus and Drosophila melanogaster.
	GO:0019885	antigen processing and presentation of endogenous peptide antigen via MHC class I	The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex. The peptide antigen is typically, but not always, processed from a whole protein. Class I here refers to classical class I molecules.
	GO:0002481	antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent	The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
	GO:0002474	antigen processing and presentation of peptide antigen via MHC class I	The process in which an antigen-presenting cell expresses a peptide antigen on its cell surface in association with an MHC class I protein complex. Class I here refers to classical class I molecules.
	GO:0071281	cellular response to iron ion	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an iron ion stimulus.
	GO:0071222	cellular response to lipopolysaccharide	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a lipopolysaccharide stimulus; lipopolysaccharide is a major component of the cell wall of gram-negative bacteria.
	GO:0050829	defense response to Gram-negative bacterium	Reactions triggered in response to the presence of a Gram-negative bacterium that act to protect the cell or organism.
	GO:0050830	defense response to Gram-positive bacterium	Reactions triggered in response to the presence of a Gram-positive bacterium that act to protect the cell or organism.
	GO:0006955	immune response	Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
	GO:0002376	immune system process	Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
	GO:0045087	innate immune response	Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
	GO:0055072	iron ion homeostasis	Any process involved in the maintenance of an internal steady state of iron ions within an organism or cell.
	GO:0010977	negative regulation of neuron projection development	Any process that decreases the rate, frequency or extent of neuron projection development. Neuron projection development is the process whose specific outcome is the progression of a neuron projection over time, from its formation to the mature structure. A neuron projection is any process extending from a neural cell, such as axons or dendrites (collectively called neurites).
	GO:1900121	negative regulation of receptor binding	Any process that stops, prevents or reduces the frequency, rate or extent of a protein or other molecule binding to a receptor.
	GO:0002726	positive regulation of T cell cytokine production	Any process that activates or increases the frequency, rate, or extent of T cell cytokine production.
	GO:0001916	positive regulation of T cell mediated cytotoxicity	Any process that activates or increases the frequency, rate or extent of T cell mediated cytotoxicity.
	GO:1904434	positive regulation of ferrous iron binding	Any process that activates or increases the frequency, rate or extent of ferrous iron binding.
	GO:0032092	positive regulation of protein binding	Any process that activates or increases the frequency, rate or extent of protein binding.
	GO:1900122	positive regulation of receptor binding	Any process that activates or increases the frequency, rate or extent of a protein or other molecule binding to a receptor.
	GO:0048260	positive regulation of receptor-mediated endocytosis	Any process that activates or increases the frequency, rate or extent of receptor mediated endocytosis, the uptake of external materials by cells, utilizing receptors to ensure specificity of transport.
	GO:1904437	positive regulation of transferrin receptor binding	Any process that activates or increases the frequency, rate or extent of transferrin receptor binding.
	GO:0042026	protein refolding	The process carried out by a cell that restores the biological activity of an unfolded or misfolded protein, using helper proteins such as chaperones.
	GO:0003254	regulation of membrane depolarization	Any process that modulates the rate, frequency or extent of membrane depolarization. Membrane depolarization is the process in which membrane potential changes in the depolarizing direction from the resting potential, usually from negative to positive.
	GO:0002237	response to molecule of bacterial origin	Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus by molecules of bacterial origin such as peptides derived from bacterial flagellin.
	GO:0001895	retina homeostasis	A tissue homeostatic process involved in the maintenance of an internal equilibrium within the retina of the eye, including control of cellular proliferation and death and control of metabolic function.
cellular component
	GO:0005794	Golgi apparatus	A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
	GO:1990712	HFE-transferrin receptor complex	A protein complex containing at least HFE and a transferrin receptor (either TFR1/TFRC or TFR2), proposed to play a role in the sensing of transferrin-bound Fe (Fe2-Tf) on the plasma membrane to regulate hepcidin transcription.
	GO:0042612	MHC class I protein complex	A transmembrane protein complex composed of a MHC class I alpha chain and an invariant beta2-microglobin chain, and with or without a bound peptide antigen. Class I here refers to classical class I molecules.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0009897	external side of plasma membrane	The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
	GO:0070062	extracellular exosome	A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
	GO:0005615	extracellular space	That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
	GO:0005925	focal adhesion	Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

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	1gzq
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	CD1B_HUMAN \| P29016
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1a1m	MHC CLASS I MOLECULE B*5301 COMPLEXED WITH PEPTIDETYPDINQML FROM GAG PROTEIN OF HIV2
1a1n	MHC CLASS I MOLECULE B*3501 COMPLEXED WITH PEPTIDE VPLRPMTYFROM THE NEF PROTEIN (75- 82) OF HIV1
1a1o	MHC CLASS I MOLECULE B5301 COMPLEXED WITH PEPTIDE LS6 (KPIVQYDNF) FROM THE MALARIA PARASITE P. FALCIPARUM
1a6z	HFE (HUMAN) HEMOCHROMATOSIS PROTEIN
1a9b	DECAMER-LIKE CONFORMATION OF A NANO-PEPTIDE BOUND TO HLA-B 3501 DUE TO NONSTANDARD POSITIONING OF THE C-TERMINUS
1a9e	DECAMER-LIKE CONFORMATION OF A NANO-PEPTIDE BOUND TO HLA-B 3501 DUE TO NONSTANDARD POSITIONING OF THE C-TERMINUS
1agb	ANTAGONIST HIV-1 GAG PEPTIDES INDUCE STRUCTURAL CHANGES IN HLA B8 - HIV-1 GAG PEPTIDE (GGRKKYKL - 3R MUTATION)
1agc	ANTAGONIST HIV-1 GAG PEPTIDES INDUCE STRUCTURAL CHANGES IN HLA B8 - HIV-1 GAG PEPTIDE (GGKKKYQL - 7Q MUTATION)
1agd	ANTAGONIST HIV-1 GAG PEPTIDES INDUCE STRUCTURAL CHANGES IN HLA B8 - HIV-1 GAG PEPTIDE (GGKKKYKL - INDEX PEPTIDE)
1age	ANTAGONIST HIV-1 GAG PEPTIDES INDUCE STRUCTURAL CHANGES IN HLA B8 - HIV-1 GAG PEPTIDE (GGKKKYRL - 7R MUTATION)
1agf	ANTAGONIST HIV-1 GAG PEPTIDES INDUCE STRUCTURAL CHANGES IN HLA B8 - HIV-1 GAG PEPTIDE (GGKKRYKL - 5R MUTATION)
1akj	COMPLEX OF THE HUMAN MHC CLASS I GLYCOPROTEIN HLA-A2 ANDTHE T CELL CORECEPTOR CD8
1ce6	MHC CLASS I H-2DB COMPLEXED WITH A SENDAI VIRUSNUCLEOPROTEIN PEPTIDE
1de4	HEMOCHROMATOSIS PROTEIN HFE COMPLEXED WITH TRANSFERRINRECEPTOR
1e27	NONSTANDARD PEPTIDE BINDING OF HLA-B*5101 COMPLEXED WITH HIV IMMUNODOMINANT EPITOPE KM1 (LPPVVAKEI)
1e28	NONSTANDARD PEPTIDE BINDING OF HLA-B*5101 COMPLEXED WITH HIV IMMUNODOMINANT EPITOPE KM2 (TAFTIPSI)
1efx	STRUCTURE OF A COMPLEX BETWEEN THE HUMAN NATURAL KILLER CELL RECEPTOR KIR2DL2 AND A CLASS I MHC LIGAND HLA-CW3
1exu	CRYSTAL STRUCTURE OF THE HUMAN MHC-RELATED FC RECEPTOR
1gzp	CD1B IN COMPLEX WITH GM2 GANGLIOSIDE
1hhg
1hhh
1hhi
1hhj	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA -A 0201) COMPLEX WITH A NONAMERIC PEPTIDE FROM HIV-1 REVERSE TRANSCRIPTASE (RESIDUES 309-317)
1hhk
1hla	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN A2 ( HLA-A2, HUMAN LEUCOCYTE ANTIGEN)
1hsa	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN HLA- B(ASTERISK)2705
1hsb	CLASS I HISTOCOMPATIBILITY ANTIGEN AW68.1 ( LEUCOCYTE ANTIGEN)
1i4f	CRYSTAL STRUCTURE OF HLA-A*0201/MAGE-A4- PEPTIDE COMPLEX
1i7r	CRYSTAL STRUCTURE OF CLASS I MHC A2 IN COMPLEX WITH PEPTIDEP1058
1i7t	CRYSTAL STRUCTURE OF CLASS I MHC A2 IN COMPLEX WITH PEPTIDEP1049-5V
1i7u	CRYSTAL STRUCTURE OF CLASS I MHC A2 IN COMPLEX WITH PEPTIDEP1049-6V
1im3	CRYSTAL STRUCTURE OF THE HUMAN CYTOMEGALOVIRUS PROTEIN US2BOUND TO THE MHC CLASS I MOLECULE HLA-A2/TAX
1im9	CRYSTAL STRUCTURE OF THE HUMAN NATURAL KILLER CELLINHIBITORY RECEPTOR KIR2DL1 BOUND TO ITS MHC LIGAND HLA-CW4
1jf1	CRYSTAL STRUCTURE OF HLA-A2*0201 IN COMPLEX WITH ADECAMERIC ALTERED PEPTIDE LIGAND FROM THE MART-1/MELAN-A
1jht	CRYSTAL STRUCTURE OF HLA-A2*0201 IN COMPLEX WITH ANONAMERIC ALTERED PEPTIDE LIGAND (ALGIGILTV) FROM THE MART-1/MELAN-A.
1jnj	NMR SOLUTION STRUCTURE OF THE HUMAN BETA2- MICROGLOBULIN
1qlf	MHC CLASS I H-2DB COMPLEXED WITH GLYCOPEPTIDE K3G
1qqd	CRYSTAL STRUCTURE OF HLA-CW4, A LIGAND FOR THE KIR2D NATURAL KILLER CELL INHIBITORY RECEPTOR
1tmc	TRUNCATED HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN HLA-AW68 COMPLEXED WITH A DECAMERIC PEPTIDE (EVAPPEYHRK)
2clr	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA -A 0201) COMPLEXED WITH A DECAMERIC PEPTIDE FROM CALRETICULIN
2hla	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN AW 68.1 (HLA-AW 68.1, HUMAN LEUCOCYTE ANTIGEN)
3hla	HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN A2. 1 (HLA-A2.1 HUMAN LEUCOCYTE ANTIGEN)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (4, 6)

Sites (6, 6)

SS Bonds (4, 4)

Cis Peptide Bonds (3, 3)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (1, 1)

PROSITE Motifs (1, 1)

Exons (8, 8)

Sequences/Alignments

Classification and Annotation

SCOP Domains (3, 3)

CATH Domains (2, 3)

Pfam Domains (0, 0)

Gene Ontology (65, 114)

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Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File