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(-) Description

Title :  CRYSTAL STRUCTURE OF THE NEONATAL FC RECEPTOR COMPLEXED WITH A HETERODIMERIC FC
 
Authors :  W. L. Martin, A. P. West Jr. , L. Gan, P. J. Bjorkman
Date :  31 Jan 01  (Deposition) - 14 Feb 01  (Release) - 25 Sep 13  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.80
Chains :  Asym./Biol. Unit :  A,B,C,D
Keywords :  Mhc Class I Fold, Ig Constant Domains, Immune System (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  W. L. Martin, A. P. West Jr. , L. Gan, P. J. Bjorkman
Crystal Structure At 2. 8 A Of An Fcrn/Heterodimeric Fc Complex: Mechanism Of Ph-Dependent Binding.
Mol. Cell V. 7 867 2001
PubMed-ID: 11336709  |  Reference-DOI: 10.1016/S1097-2765(01)00230-1

(-) Compounds

Molecule 1 - NEONATAL FC RECEPTOR A
    ChainsA
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPBJ-5GS
    Expression System StrainCHO-K1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentEXTRACELLULAR DOMAIN
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymIGG RECEPTOR FCRN LARGE SUBUNIT P51, FCRN
 
Molecule 2 - BETA-2-MICROGLOBULIN
    ChainsB
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPBJ-5GS
    Expression System StrainCHO-K1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentFC FRAGMENT
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymHDFC
 
Molecule 3 - IG GAMMA-2A CHAIN C REGION
    ChainsC
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPBJ-5GS
    Expression System StrainCHO-K1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentWILD-TYPE FC FRAGMENT
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymWTFC
 
Molecule 4 - IG GAMMA-2A CHAIN C REGION
    ChainsD
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPBJ-5GS
    Expression System StrainCHO-K1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentNON-FCRN-BINDING FC FRAGMENT
    MutationYES
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymNBFC

 Structural Features

(-) Chains, Units

  1234
Asymmetric/Biological Unit ABCD

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (7, 28)

Asymmetric/Biological Unit (7, 28)
No.NameCountTypeFull Name
1BMA3Ligand/IonBETA-D-MANNOSE
2CYS2Mod. Amino AcidCYSTEINE
3FUC3Ligand/IonALPHA-L-FUCOSE
4FUL1Ligand/IonBETA-L-FUCOSE
5MAN5Ligand/IonALPHA-D-MANNOSE
6NAG10Ligand/IonN-ACETYL-D-GLUCOSAMINE
7NDG4Ligand/Ion2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE

(-) Sites  (28, 28)

Asymmetric Unit (28, 28)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREVAL C:264 , ASP C:265 , GLN C:295 , ASN C:297 , THR C:299 , FUL C:502 , NAG C:503BINDING SITE FOR RESIDUE NAG C 501
02AC2SOFTWAREGLN C:295 , NAG C:501BINDING SITE FOR RESIDUE FUL C 502
03AC3SOFTWAREPHE C:241 , VAL C:264 , ARG C:301 , NAG C:501 , BMA C:504 , MAN C:505BINDING SITE FOR RESIDUE NAG C 503
04AC4SOFTWAREPHE C:243 , NAG C:503 , MAN C:505 , MAN C:508 , MAN D:558BINDING SITE FOR RESIDUE BMA C 504
05AC5SOFTWARENAG C:503 , BMA C:504 , NAG C:506BINDING SITE FOR RESIDUE MAN C 505
06AC6SOFTWARELYS C:246 , MAN C:505BINDING SITE FOR RESIDUE NAG C 506
07AC7SOFTWAREBMA C:504 , NAG C:509 , NAG D:553BINDING SITE FOR RESIDUE MAN C 508
08AC8SOFTWARELYS C:334 , MAN C:508BINDING SITE FOR RESIDUE NAG C 509
09AC9SOFTWAREVAL D:264 , ASP D:265 , ASN D:297 , THR D:299 , FUC D:552 , NAG D:553BINDING SITE FOR RESIDUE NAG D 551
10BC1SOFTWARENAG D:551BINDING SITE FOR RESIDUE FUC D 552
11BC2SOFTWAREMAN C:508 , SER D:239 , VAL D:264 , ARG D:301 , NAG D:551 , BMA D:554 , MAN D:555BINDING SITE FOR RESIDUE NAG D 553
12BC3SOFTWAREPHE D:241 , PHE D:243 , NAG D:553 , MAN D:555 , MAN D:558BINDING SITE FOR RESIDUE BMA D 554
13BC4SOFTWAREPHE D:243 , NAG D:553 , BMA D:554 , NAG D:556BINDING SITE FOR RESIDUE MAN D 555
14BC5SOFTWARELYS D:246 , VAL D:262 , MAN D:555BINDING SITE FOR RESIDUE NAG D 556
15BC6SOFTWAREBMA C:504 , PHE D:241 , BMA D:554 , NAG D:559BINDING SITE FOR RESIDUE MAN D 558
16BC7SOFTWAREPHE D:241 , ILE D:242 , LYS D:334 , MAN D:558BINDING SITE FOR RESIDUE NAG D 559
17BC8SOFTWAREASN A:87BINDING SITE FOR RESIDUE NDG A 601
18BC9SOFTWAREASN A:104 , FUC A:652BINDING SITE FOR RESIDUE NDG A 651
19CC1SOFTWAREGLU A:170 , NDG A:651BINDING SITE FOR RESIDUE FUC A 652
20CC2SOFTWAREASN A:128 , FUC A:702 , NAG A:703BINDING SITE FOR RESIDUE NDG A 701
21CC3SOFTWARETRP A:129 , GLY A:131 , THR A:136 , ASP A:137 , ASN A:141 , NDG A:701 , HIS C:433 , ASN C:434BINDING SITE FOR RESIDUE FUC A 702
22CC4SOFTWARENDG A:701 , BMA A:704 , MAN A:708 , GLU C:356 , GLU D:438 , LYS D:439BINDING SITE FOR RESIDUE NAG A 703
23CC5SOFTWARENAG A:703 , MAN A:708BINDING SITE FOR RESIDUE BMA A 704
24CC6SOFTWARENAG A:703 , BMA A:704 , NDG A:709 , GLU C:356BINDING SITE FOR RESIDUE MAN A 708
25CC7SOFTWAREMAN A:708 , PRO C:346 , GLN C:347 , VAL C:348 , LYS C:439 , GLN D:347BINDING SITE FOR RESIDUE NDG A 709
26CC8SOFTWAREASN A:225 , LEU A:241BINDING SITE FOR RESIDUE NAG A 751
27CC9SOFTWAREGLN A:34 , CYS A:48 , GLY A:49 , ASP B:53 , GLN C:419BINDING SITE FOR RESIDUE CYS A 901
28DC1SOFTWARELEU A:210 , LYS A:211 , CYS A:226BINDING SITE FOR RESIDUE CYS A 951

(-) SS Bonds  (7, 7)

Asymmetric/Biological Unit
No.Residues
1A:98 -A:161
2A:200 -A:254
3B:25 -B:80
4C:261 -C:321
5C:367 -C:425
6D:261 -D:321
7D:367 -D:425

(-) Cis Peptide Bonds  (3, 3)

Asymmetric/Biological Unit
No.Residues
1His B:31 -Pro B:32
2Tyr C:373 -Pro C:374
3Tyr D:373 -Pro D:374

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1I1A)

(-) PROSITE Motifs  (1, 2)

Asymmetric/Biological Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.B2MG_RAT98-104  1B:78-84
FCGRN_RAT274-280  1A:252-258

(-) Exons   (6, 6)

Asymmetric/Biological Unit (6, 6)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENSRNOT000000230171ENSRNOE00000164042chr3:108927919-10892799274B2MG_RAT1-23231B:1-33
1.2ENSRNOT000000230172ENSRNOE00000164162chr3:108930763-108931041279B2MG_RAT23-116941B:3-9694
1.3ENSRNOT000000230173ENSRNOE00000164268chr3:108931555-10893158329B2MG_RAT116-11941B:96-994
1.4ENSRNOT000000230174ENSRNOE00000164313chr3:108932497-108932718222B2MG_RAT-00--

2.1ENSRNOT000000279441ENSRNOE00000200618chr1:95575645-95575374272FCGRN_RAT1-24240--
2.2ENSRNOT000000279442ENSRNOE00000332713chr1:95575029-95574764266FCGRN_RAT24-112891A:5-9086
2.3ENSRNOT000000279443ENSRNOE00000317180chr1:95574558-95574285274FCGRN_RAT113-204921A:91-18292
2.4ENSRNOT000000279444ENSRNOE00000200632chr1:95568691-95568422270FCGRN_RAT204-294911A:182-26988
2.5ENSRNOT000000279445ENSRNOE00000200697chr1:95567379-95567263117FCGRN_RAT294-333400--
2.6ENSRNOT000000279446ENSRNOE00000200642chr1:95567073-95566717357FCGRN_RAT333-368360--

(-) Sequences/Alignments

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:265
 aligned with FCGRN_RAT | P13599 from UniProtKB/Swiss-Prot  Length:366

    Alignment length:265
                                    36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286     
            FCGRN_RAT    27 LPLMYHLAAVSDLSTGLPSFWATGWLGAQQYLTYNNLRQEADPCGAWIWENQVSWYWEKETTDLKSKEQLFLEAIRTLENQINGTFTLQGLLGCELAPDNSSLPTAVFALNGEEFMRFNPRTGNWSGEWPETDIVGNLWMKQPEAARKESEFLLTSCPERLLGHLERGRQNLEWKEPPSMRLKARPGNSGSSVLTCAAFSFYPPELKFRFLRNGLASGSGNCSTGPNGDGSFHAWSLLEVKRGDEHHYQCQVEHEGLAQPLTVDL 291
               SCOP domains d1i1aa2 A:5-178 Fc (IgG) receptor, alpha-1 and alpha-2 domains                                                                                                                d1i1aa1 A:179-269 Fc (IgG) receptor, alpha-3 domain                                         SCOP domains
               CATH domains 1i1aA01 A:5-177 Murine Class I Major Histocompatibility Complex, H2-DB, subunit A, domain 1                                                                                  1i1aA02 A:178-269 Immunoglobulins                                                            CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeeeeeee.........eeeeeee..eeeeeee......ee.hhhh......hhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeeeeeeee.....eeeeeeeee..eeeeeee....eee..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.....eeeeeee.....eeeeeeeeeee.....eeeeee..ee.....eeeee.....eeeeeeeeee..hhh.eeeeee.......eee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------IG_MHC ----------- PROSITE
           Transcript 2 (1) Exon 2.2  PDB: A:5-90 UniProt: 24-112 [INCOMPLETE]                                    Exon 2.3  PDB: A:91-182 UniProt: 113-204                                                    --------------------------------------------------------------------------------------- Transcript 2 (1)
           Transcript 2 (2) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 2.4  PDB: A:182-269 UniProt: 204-294 [INCOMPLETE]                                   Transcript 2 (2)
                 1i1a A   5 LPLMYHLAAVSDLSTGLPSFWATGWLGAQQYLTYNNLRQEADPCGAWIWENQVSWYWEKETTDLKSKEQLFLEAIRTLENQINGTFTLQGLLGCELAPDNSSLPTAVFALNGEEFMRFNPRTGNWSGEWPETDIVGNLWMKQPEAARKESEFLLTSCPERLLGHLERGRQNLEWKEPPSMRLKARPGNSGSSVLTCAAFSFYPPELKFRFLRNGLASGSGNCSTGPNGDGSFHAWSLLEVKRGDEHHYQCQVEHEGLAQPLTVDL 269
                                    14        24        34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264     

Chain B from PDB  Type:PROTEIN  Length:99
 aligned with B2MG_RAT | P07151 from UniProtKB/Swiss-Prot  Length:119

    Alignment length:99
                                    30        40        50        60        70        80        90       100       110         
             B2MG_RAT    21 IQKTPQIQVYSRHPPENGKPNFLNCYVSQFHPPQIEIELLKNGKKIPNIEMSDLSFSKDWSFYILAHTEFTPTETDVYACRVKHVTLKEPKTVTWDRDM 119
               SCOP domains d1i1ab_ B: beta2-microglobulin                                                                      SCOP domains
               CATH domains 1i1aB00 B:1-99 Immunoglobulins                                                                      CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeeee.........eeeeeeeeee.....eeeeee..ee....ee...ee.....eeeeeeeee.......eeeeee.......eeee..... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------------------------------------------------------------------------IG_MHC --------------- PROSITE
           Transcript 1 (1) 1.1--------------------------------------------------------------------------------------------1.3  Transcript 1 (1)
           Transcript 1 (2) --Exon 1.2  PDB: B:3-96 UniProt: 23-116                                                         --- Transcript 1 (2)
                 1i1a B   1 IQKTPQIQVYSRHPPENGKPNFLNCYVSQFHPPQIEIELLKNGKKIPNIEMSDLSFSKDWSFYILAHTEFTPTETDVYACRVKHVTLKEPKTVTWDRDM  99
                                    10        20        30        40        50        60        70        80        90         

Chain C from PDB  Type:PROTEIN  Length:205
 aligned with IGG2A_RAT | P20760 from UniProtKB/Swiss-Prot  Length:322

    Alignment length:205
                                   123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283       293       303       313     
            IGG2A_RAT   114 SVFIFPPKTKDVLTITLTPKVTCVVVDISQNDPEVRFSWFIDDVEVHTAQTHAPEKQSNSTLRSVSELPIVHRDWLNGKTFKCKVNSGAFPAPIEKSISKPEGTPRGPQVYTMAPPKEEMTQSQVSITCMVKGFYPPDIYTEWKMNGQPQENYKNTPPTMDTDGSYFLYSKLNVKKETWQQGNTFTCSVLHEGLHNHHTEKSLSH 318
               SCOP domains d1i1ac1 C:239-341 Immunoglobulin heavy chain gamma constant domain 2, CH2-gamma                        d1i1ac2 C:342-443 Immunoglobulin heavy chain gamma constant domain 3, CH3-gamma                        SCOP domains
               CATH domains 1i1aC01 C:239-337 Immunoglobulins                                                                  1i1aC02 C:338-443 Immunoglobulins                                                                          CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeee..hhhhhhh.....eeeeee..........eeeeee...ee...eeeeeee.....eeeeeeee.hhhhhhh...eeeeee.......eeeee..........eeeee..hhhhh...eeeeeeeeeee.....eeeeee..ee...eee...ee.....eeeeeeeeeehhhhhh...eeeeee...hhh.eeeeee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1i1a C 239 SVFIFPPKTKDVLTITLTPKVTCVVVDISQNDPEVRFSWFIDDVEVHTAQTHAPEKQSNSTLRSVSELPIVHRDWLNGKTFKCKVNSGAFPAPIEKSISKPEGTPRGPQVYTMAPPKEEMTQSQVSITCMVKGFYPPDIYTEWKMNGQPQENYKNTPPTMDTDGSYFLYSKLNVKKETWQQGNTFTCSVLHEGLHNHHTEKSLSH 443
                                   248       258       268       278       288       298       308       318       328       338       348       358       368       378       388       398       408       418       428       438     

Chain D from PDB  Type:PROTEIN  Length:205
 aligned with IGG2A_RAT | P20760 from UniProtKB/Swiss-Prot  Length:322

    Alignment length:205
                                   123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283       293       303       313     
            IGG2A_RAT   114 SVFIFPPKTKDVLTITLTPKVTCVVVDISQNDPEVRFSWFIDDVEVHTAQTHAPEKQSNSTLRSVSELPIVHRDWLNGKTFKCKVNSGAFPAPIEKSISKPEGTPRGPQVYTMAPPKEEMTQSQVSITCMVKGFYPPDIYTEWKMNGQPQENYKNTPPTMDTDGSYFLYSKLNVKKETWQQGNTFTCSVLHEGLHNHHTEKSLSH 318
               SCOP domains d1i1ad1 D:239-341 Immunoglobulin heavy chain gamma constant domain 2, CH2-gamma                        d1i1ad2 D:342-443 Immunoglobulin heavy chain gamma constant domain 3, CH3-gamma                        SCOP domains
               CATH domains 1i1aD01 D:239-337 Immunoglobulins                                                                  1i1aD02 D:338-443 Immunoglobulins                                                                          CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......hhhhhh......ee................eee.........eee............eeeee.hhhhhh.....eee........................eeeee..........eeeeeeeeeee......eeeee..ee...eee...ee.....eeeeeeeeeehhhhhh...eeeeee...hhh.eeeeee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1i1a D 239 SVFIFPPKTKDVLGGGLTPKVTCVVVDISQNDPEVRFSWFIDDVEVHTAQTHAPEKQSNSTLRSVSELPIVERDWLNGKTFKCKVNSGAFPAPIEKSISKPEGTPRGPQVYTMAPPKEEMTQSQVSITCMVKGFYPPDIYTEWKMNGQPQENYKNTPPTMDTDGSYFLYSKLNVKKETWQQGNTFTCSVLHEGLENEHTEKSLSH 443
                                   248       258       268       278       288       298       308       318       328       338       348       358       368       378       388       398       408       418       428       438     

   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 '|'

 Classification and Annotation

(-) SCOP Domains  (5, 7)

Asymmetric/Biological Unit

(-) CATH Domains  (2, 7)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)
(-)
Class: Mainly Beta (13760)
2a1i1aB00B:1-99
2b1i1aA02A:178-269
2c1i1aD02D:338-443
2d1i1aC02C:338-443
2e1i1aD01D:239-337
2f1i1aC01C:239-337

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1I1A)

(-) Gene Ontology  (59, 65)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (FCGRN_RAT | P13599)
molecular function
    GO:0019864    IgG binding    Interacting selectively and non-covalently with an immunoglobulin of an IgG isotype.
    GO:0019770    IgG receptor activity    Combining with an immunoglobulin of an IgG isotype via the Fc region, and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity.
    GO:0003823    antigen binding    Interacting selectively and non-covalently with an antigen, any substance which is capable of inducing a specific immune response and of reacting with the products of that response, the specific antibody or specifically sensitized T-lymphocytes, or both. Binding may counteract the biological activity of the antigen.
    GO:0030881    beta-2-microglobulin binding    Interacting selectively and non-covalently with beta-2-microglobulin.
    GO:0042605    peptide antigen binding    Interacting selectively and non-covalently with an antigen peptide.
biological process
    GO:0038094    Fc-gamma receptor signaling pathway    A series of molecular signals initiated by the binding of the Fc portion of immunoglobulin G (IgG) to an Fc-gamma receptor on the surface of a signal-receiving cell, and ending with regulation of a downstream cellular process, e.g. transcription. The Fc portion of an immunoglobulin is its C-terminal constant region.
    GO:0019882    antigen processing and presentation    The process in which an antigen-presenting cell expresses antigen (peptide or lipid) on its cell surface in association with an MHC protein complex.
    GO:0006959    humoral immune response    An immune response mediated through a body fluid.
    GO:0006955    immune response    Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
cellular component
    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: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_RAT | P07151)
molecular function
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0003674    molecular_function    Elemental activities, such as catalysis or binding, describing the actions of a gene product at the molecular level. A given gene product may exhibit one or more molecular functions.
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: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: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.

Chain C,D   (IGG2A_RAT | P20760)
molecular function
    GO:0003823    antigen binding    Interacting selectively and non-covalently with an antigen, any substance which is capable of inducing a specific immune response and of reacting with the products of that response, the specific antibody or specifically sensitized T-lymphocytes, or both. Binding may counteract the biological activity of the antigen.
    GO:0034987    immunoglobulin receptor binding    Interacting selectively and non-covalently with one or more specific sites on an immunoglobulin receptor molecule.
biological process
    GO:0050853    B cell receptor signaling pathway    A series of molecular signals initiated by the cross-linking of an antigen receptor on a B cell.
    GO:0006958    complement activation, classical pathway    Any process involved in the activation of any of the steps of the classical pathway of the complement cascade which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes.
    GO:0042742    defense response to bacterium    Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism.
    GO:0045087    innate immune response    Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
    GO:0006911    phagocytosis, engulfment    The internalization of bacteria, immune complexes and other particulate matter or of an apoptotic cell by phagocytosis, including the membrane and cytoskeletal processes required, which involves one of three mechanisms: zippering of pseudopods around a target via repeated receptor-ligand interactions, sinking of the target directly into plasma membrane of the phagocytosing cell, or induced uptake via an enhanced membrane ruffling of the phagocytosing cell similar to macropinocytosis.
    GO:0006910    phagocytosis, recognition    The initial step in phagocytosis involving adhesion to bacteria, immune complexes and other particulate matter, or an apoptotic cell and based on recognition of factors such as bacterial cell wall components, opsonins like complement and antibody or protein receptors and lipids like phosphatidyl serine, and leading to intracellular signaling in the phagocytosing cell.
    GO:0050871    positive regulation of B cell activation    Any process that activates or increases the frequency, rate or extent of B cell activation.
cellular component
    GO:0072562    blood microparticle    A phospholipid microvesicle that is derived from any of several cell types, such as platelets, blood cells, endothelial cells, or others, and contains membrane receptors as well as other proteins characteristic of the parental cell. Microparticles are heterogeneous in size, and are characterized as microvesicles free of nucleic acids.
    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:0042571    immunoglobulin complex, circulating    An immunoglobulin complex that is secreted into extracellular space and found in mucosal areas or other tissues or circulating in the blood or lymph. In its canonical form, a circulating immunoglobulin complex is composed of two identical heavy chains and two identical light chains, held together by disulfide bonds. Some forms of are polymers of the basic structure and contain additional components such as J-chain and the secretory component.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        B2MG_RAT | P071511ed3 1frt 1kjm 1kjv 2frt 3fru
        FCGRN_RAT | P135991frt 2frt 3fru
        IGG2A_RAT | P207601fn4 1i1c 4uao

(-) Related Entries Specified in the PDB File

1fc1 FC FRAGMENT OF IGG
1i1c NON-FCRN BINDING FC FRAGMENT OF RAT IGG2A
3fru NEONATAL FC RECEPTOR