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(-) Description

Title :  CRYSTAL STRUCTURE OF MHC CLASS II ASSOCIATED P41 II FRAGMENT IN COMPLEX WITH CATHEPSIN L
 
Authors :  G. Guncar, G. Pungercic, I. Klemencic, V. Turk, D. Turk
Date :  07 Jan 99  (Deposition) - 12 Jan 00  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.00
Chains :  Asym. Unit :  A,B,C,D,I,J
Biol. Unit 1:  A,B,I  (1x)
Biol. Unit 2:  C,D,J  (1x)
Biol. Unit 3:  A (1x),B (1x),C (1x),D (1x),I (1x),J (1x)
Keywords :  Cysteine Proteinase, Cathepsin, Mhc Class Ii, Invariant Chain, Thyroglobulin Type-1 Domain, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  G. Guncar, G. Pungercic, I. Klemencic, V. Turk, D. Turk
Crystal Structure Of Mhc Class Ii-Associated P41 Ii Fragmen Bound To Cathepsin L Reveals The Structural Basis For Differentiation Between Cathepsins L And S.
Embo J. V. 18 793 1999
PubMed-ID: 10022822  |  Reference-DOI: 10.1093/EMBOJ/18.4.793

(-) Compounds

Molecule 1
    ChainsA, C
    EC Number3.4.22.15
    OrganKIDNEY
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
 
Molecule 2
    ChainsB, D
    EC Number3.4.22.15
    OrganKIDNEY
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
 
Molecule 3 - PROTEIN (INVARIANT CHAIN)
    ChainsI, J
    FragmentTHYROGLOBULIN TYPE-1 DOMAIN
    OrganKIDNEY
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymII FRAGMENT, CD74 FRAGMENT

 Structural Features

(-) Chains, Units

  123456
Asymmetric Unit ABCDIJ
Biological Unit 1 (1x)AB  I 
Biological Unit 2 (1x)  CD J
Biological Unit 3 (1x)A (1x)B (1x)C (1x)D (1x)I (1x)J (1x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 2)

Asymmetric Unit (1, 2)
No.NameCountTypeFull Name
1NAG2Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1NAG1Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 2 (1, 1)
No.NameCountTypeFull Name
1NAG1Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 3 (1, 1)
No.NameCountTypeFull Name
1NAG1Ligand/IonN-ACETYL-D-GLUCOSAMINE

(-) Sites  (3, 3)

Asymmetric Unit (3, 3)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASN I:240 , THR I:242 , HOH I:284 , HOH I:333 , HOH I:334 , HOH I:335BINDING SITE FOR RESIDUE NAG I 100
2AC2SOFTWAREASN J:240 , THR J:242 , HOH J:275 , HOH J:318 , HOH J:324BINDING SITE FOR RESIDUE NAG J 100
3ACTAUTHORCYS A:25 , HIS A:163 , CYS C:25 , HIS C:163ACTIVE SITE

(-) SS Bonds  (12, 12)

Asymmetric Unit
No.Residues
1A:22 -A:65
2A:56 -A:98
3A:156 -B:209
4C:22 -C:65
5C:56 -C:98
6C:156 -D:209
7I:197 -I:216
8I:227 -I:234
9I:236 -I:255
10J:197 -J:216
11J:227 -J:234
12J:236 -J:255

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1ICF)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (5, 10)

Asymmetric Unit (5, 10)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CATL1_HUMAN132-143
 
  2A:19-30
C:19-30
2THYROGLOBULIN_1_2PS51162 Thyroglobulin type-1 domain profile.HG2A_HUMAN210-271
 
  2I:194-255
J:194-255
3THYROGLOBULIN_1_1PS00484 Thyroglobulin type-1 repeat signature.HG2A_HUMAN228-257
 
  2I:212-241
J:212-241
4THIOL_PROTEASE_HISPS00639 Eukaryotic thiol (cysteine) proteases histidine active site.CATL1_HUMAN274-284
 
  2A:161-171
C:161-171
5THIOL_PROTEASE_ASNPS00640 Eukaryotic thiol (cysteine) proteases asparagine active site.CATL1_HUMAN295-314
 
  2B:182-201
D:182-201
Biological Unit 1 (5, 5)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CATL1_HUMAN132-143
 
  1A:19-30
-
2THYROGLOBULIN_1_2PS51162 Thyroglobulin type-1 domain profile.HG2A_HUMAN210-271
 
  1I:194-255
-
3THYROGLOBULIN_1_1PS00484 Thyroglobulin type-1 repeat signature.HG2A_HUMAN228-257
 
  1I:212-241
-
4THIOL_PROTEASE_HISPS00639 Eukaryotic thiol (cysteine) proteases histidine active site.CATL1_HUMAN274-284
 
  1A:161-171
-
5THIOL_PROTEASE_ASNPS00640 Eukaryotic thiol (cysteine) proteases asparagine active site.CATL1_HUMAN295-314
 
  1B:182-201
-
Biological Unit 2 (5, 5)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CATL1_HUMAN132-143
 
  1-
C:19-30
2THYROGLOBULIN_1_2PS51162 Thyroglobulin type-1 domain profile.HG2A_HUMAN210-271
 
  1-
J:194-255
3THYROGLOBULIN_1_1PS00484 Thyroglobulin type-1 repeat signature.HG2A_HUMAN228-257
 
  1-
J:212-241
4THIOL_PROTEASE_HISPS00639 Eukaryotic thiol (cysteine) proteases histidine active site.CATL1_HUMAN274-284
 
  1-
C:161-171
5THIOL_PROTEASE_ASNPS00640 Eukaryotic thiol (cysteine) proteases asparagine active site.CATL1_HUMAN295-314
 
  1-
D:182-201
Biological Unit 3 (5, 10)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CATL1_HUMAN132-143
 
  2A:19-30
C:19-30
2THYROGLOBULIN_1_2PS51162 Thyroglobulin type-1 domain profile.HG2A_HUMAN210-271
 
  2I:194-255
J:194-255
3THYROGLOBULIN_1_1PS00484 Thyroglobulin type-1 repeat signature.HG2A_HUMAN228-257
 
  2I:212-241
J:212-241
4THIOL_PROTEASE_HISPS00639 Eukaryotic thiol (cysteine) proteases histidine active site.CATL1_HUMAN274-284
 
  2A:161-171
C:161-171
5THIOL_PROTEASE_ASNPS00640 Eukaryotic thiol (cysteine) proteases asparagine active site.CATL1_HUMAN295-314
 
  2B:182-201
D:182-201

(-) Exons   (7, 16)

Asymmetric Unit (7, 16)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1dENST000000095301dENSE00002143935chr5:149792314-149792188127HG2A_HUMAN1-42420--
1.2aENST000000095302aENSE00000767447chr5:149786887-149786715173HG2A_HUMAN42-100590--
1.2cENST000000095302cENSE00000439662chr5:149786523-14978644480HG2A_HUMAN100-126270--
1.3aENST000000095303aENSE00000767449chr5:149785884-14978582263HG2A_HUMAN127-147210--
1.5ENST000000095305ENSE00000767450chr5:149784743-14978464896HG2A_HUMAN148-179320--
1.6aENST000000095306aENSE00000841201chr5:149784330-14978424388HG2A_HUMAN180-209300--
1.7ENST000000095307ENSE00000767452chr5:149782875-149782684192HG2A_HUMAN209-273652I:194-257
J:194-257
64
64
1.8aENST000000095308aENSE00001673543chr5:149782188-14978212663HG2A_HUMAN273-294222I:257-258
J:257-258
2
2
1.8dENST000000095308dENSE00002129676chr5:149781813-14978171599HG2A_HUMAN294-29630--

2.1aENST000003431501aENSE00001886667chr9:90340434-90341313880CATL1_HUMAN-00--
2.2bENST000003431502bENSE00002159545chr9:90342509-90342644136CATL1_HUMAN1-42420--
2.3aENST000003431503aENSE00001686191chr9:90342942-90343064123CATL1_HUMAN43-83410--
2.4ENST000003431504ENSE00001692924chr9:90343165-90343311147CATL1_HUMAN84-132492A:1-19
-
C:1-19
-
19
-
19
-
2.5aENST000003431505aENSE00000917752chr9:90343500-90343724225CATL1_HUMAN133-207752A:20-94
-
C:20-94
-
75
-
75
-
2.6bENST000003431506bENSE00000917753chr9:90344488-90344650163CATL1_HUMAN208-262552A:95-149
-
C:95-149
-
55
-
55
-
2.7ENST000003431507ENSE00001618315chr9:90345296-90345413118CATL1_HUMAN262-301404A:149-175
B:179-188
C:149-175
D:179-188
27
10
27
10
2.8cENST000003431508cENSE00001931704chr9:90345923-90346307385CATL1_HUMAN301-333332-
B:188-220
-
D:188-220
-
33
-
33

(-) Sequences/Alignments

Asymmetric 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:175
 aligned with CATL1_HUMAN | P07711 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:175
                                   123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283     
          CATL1_HUMAN   114 APRSVDWREKGYVTPVKNQGQCGSCWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFEST 288
               SCOP domains d1icf.1 A:,B: (Pro)cathepsin L                                                                                                                                                  SCOP domains
               CATH domains 1icfA00 A:1-175 Cysteine proteinases                                                                                                                                            CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ........................hhhhhhhhhhhhhhhhhh.......hhhhhhh.hhh...hhh...hhhhhhhhhhh.....................hhh..............hhhhhhhhhh...eeeee....hhhh..................eeeee........ Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------THIOL_PROTEA----------------------------------------------------------------------------------------------------------------------------------THIOL_PROTE---- PROSITE
           Transcript 2 (1) Exon 2.4           Exon 2.5a  PDB: A:20-94 UniProt: 133-207                                   Exon 2.6b  PDB: A:95-149 UniProt: 208-262              -------------------------- Transcript 2 (1)
           Transcript 2 (2) ----------------------------------------------------------------------------------------------------------------------------------------------------Exon 2.7  PDB: A:149-175    Transcript 2 (2)
                 1icf A   1 APRSVDWREKGYVTPVKNQGQCGSCWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFEST 175
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170     

Chain B from PDB  Type:PROTEIN  Length:42
 aligned with CATL1_HUMAN | P07711 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:42
                                   301       311       321       331  
          CATL1_HUMAN   292 NNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 333
               SCOP domains d1icf.1 A:,B: (Pro)cathepsin L             SCOP domains
               CATH domains 1icfB00 B:179-220                          CATH domains
               Pfam domains ------------------------------------------ Pfam domains
         Sec.struct. author ...eeeee...........eeeee.....hhh.......... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------ SAPs(SNPs)
                    PROSITE ---THIOL_PROTEASE_ASN  ------------------- PROSITE
           Transcript 2 (1) ---------Exon 2.8c  PDB: B:188-220         Transcript 2 (1)
           Transcript 2 (2) Exon 2.7  -------------------------------- Transcript 2 (2)
                 1icf B 179 NNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 220
                                   188       198       208       218  

Chain C from PDB  Type:PROTEIN  Length:175
 aligned with CATL1_HUMAN | P07711 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:175
                                   123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283     
          CATL1_HUMAN   114 APRSVDWREKGYVTPVKNQGQCGSCWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFEST 288
               SCOP domains d1icf.2 C:,D: (Pro)cathepsin L                                                                                                                                                  SCOP domains
               CATH domains 1icfC00 C:1-175 Cysteine proteinases                                                                                                                                            CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ........................hhhhhhhhhhhhhhhhhh.......hhhhhhh.hhh...hhh...hhhhhhhhhhh.....................hhh..............hhhhhhhhhh...eeeee....hhhh..................eeeee........ Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------THIOL_PROTEA----------------------------------------------------------------------------------------------------------------------------------THIOL_PROTE---- PROSITE
           Transcript 2 (1) Exon 2.4           Exon 2.5a  PDB: C:20-94 UniProt: 133-207                                   Exon 2.6b  PDB: C:95-149 UniProt: 208-262              -------------------------- Transcript 2 (1)
           Transcript 2 (2) ----------------------------------------------------------------------------------------------------------------------------------------------------Exon 2.7  PDB: C:149-175    Transcript 2 (2)
                 1icf C   1 APRSVDWREKGYVTPVKNQGQCGSCWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFEST 175
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170     

Chain D from PDB  Type:PROTEIN  Length:42
 aligned with CATL1_HUMAN | P07711 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:42
                                   301       311       321       331  
          CATL1_HUMAN   292 NNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 333
               SCOP domains d1icf.2 C:,D: (Pro)cathepsin L             SCOP domains
               CATH domains 1icfD00 D:179-220                          CATH domains
               Pfam domains ------------------------------------------ Pfam domains
         Sec.struct. author ...eeeee...........eeeee.....hhh.......... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------ SAPs(SNPs)
                    PROSITE ---THIOL_PROTEASE_ASN  ------------------- PROSITE
           Transcript 2 (1) ---------Exon 2.8c  PDB: D:188-220         Transcript 2 (1)
           Transcript 2 (2) Exon 2.7  -------------------------------- Transcript 2 (2)
                 1icf D 179 NNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 220
                                   188       198       208       218  

Chain I from PDB  Type:PROTEIN  Length:65
 aligned with HG2A_HUMAN | P04233 from UniProtKB/Swiss-Prot  Length:296

    Alignment length:65
                                   219       229       239       249       259       269     
           HG2A_HUMAN   210 LTKCQEEVSHIPAVHPGSFRPKCDENGNYLPLQCYGSIGYCWCVFPNGTEVPNTRSRGHHNCSES 274
               SCOP domains d1icfi_ I: Class II MHC associated p41 invariant chain fragment   SCOP domains
               CATH domains 1icfI00 I:194-258 Invariant Chain; Chain I                        CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhh.....................eeee....eeee...................... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) THYROGLOBULIN_1_2  PDB: I:194-255 UniProt: 210-271            --- PROSITE (1)
                PROSITE (2) ------------------THYROGLOBULIN_1_1             ----------------- PROSITE (2)
           Transcript 1 (1) Exon 1.7  PDB: I:194-257 UniProt: 209-273 [INCOMPLETE]          - Transcript 1 (1)
           Transcript 1 (2) ---------------------------------------------------------------1. Transcript 1 (2)
                 1icf I 194 LTKCQEEVSHIPAVHPGSFRPKCDENGNYLPLQCYGSIGYCWCVFPNGTEVPNTRSRGHHNCSES 258
                                   203       213       223       233       243       253     

Chain J from PDB  Type:PROTEIN  Length:65
 aligned with HG2A_HUMAN | P04233 from UniProtKB/Swiss-Prot  Length:296

    Alignment length:65
                                   219       229       239       249       259       269     
           HG2A_HUMAN   210 LTKCQEEVSHIPAVHPGSFRPKCDENGNYLPLQCYGSIGYCWCVFPNGTEVPNTRSRGHHNCSES 274
               SCOP domains d1icfj_ J: Class II MHC associated p41 invariant chain fragment   SCOP domains
               CATH domains 1icfJ00 J:194-258 Invariant Chain; Chain I                        CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhh.....................eeee....eeee...................... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) THYROGLOBULIN_1_2  PDB: J:194-255 UniProt: 210-271            --- PROSITE (1)
                PROSITE (2) ------------------THYROGLOBULIN_1_1             ----------------- PROSITE (2)
           Transcript 1 (1) Exon 1.7  PDB: J:194-257 UniProt: 209-273 [INCOMPLETE]          - Transcript 1 (1)
           Transcript 1 (2) ---------------------------------------------------------------1. Transcript 1 (2)
                 1icf J 194 LTKCQEEVSHIPAVHPGSFRPKCDENGNYLPLQCYGSIGYCWCVFPNGTEVPNTRSRGHHNCSES 258
                                   203       213       223       233       243       253     

   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  (2, 4)

Asymmetric Unit

(-) CATH Domains  (3, 6)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (97, 104)

Asymmetric Unit(hide GO term definitions)
Chain A,B,C,D   (CATL1_HUMAN | P07711)
molecular function
    GO:0005518    collagen binding    Interacting selectively and non-covalently with collagen, a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals. Collagen is highly enriched in glycine (some regions are 33% glycine) and proline, occurring predominantly as 3-hydroxyproline (about 20%).
    GO:0004197    cysteine-type endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0008234    cysteine-type peptidase activity    Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0001968    fibronectin binding    Interacting selectively and non-covalently with a fibronectin, a group of related adhesive glycoproteins of high molecular weight found on the surface of animal cells, connective tissue matrices, and in extracellular fluids.
    GO:0042393    histone binding    Interacting selectively and non-covalently with a histone, any of a group of water-soluble proteins found in association with the DNA of eukaroytic chromosomes. They are involved in the condensation and coiling of chromosomes during cell division and have also been implicated in nonspecific suppression of gene activity.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    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).
    GO:0043394    proteoglycan binding    Interacting selectively and non-covalently with a proteoglycan, any glycoprotein in which the carbohydrate units are glycosaminoglycans.
    GO:0004252    serine-type endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
    GO:0097655    serpin family protein binding    Interacting selectively and non-covalently with any member of the serpin protein family (serine protease inhibitors or classified inhibitor family I4). Serpins are a broadly distributed family of protease inhibitors that use a conformational change to inhibit target enzymes. They are central in controlling many important proteolytic cascades. The majority of serpins inhibit serine proteases, but serpins that inhibit caspases and papain-like cysteine proteases have also been identified. Rarely, serpins perform a non-inhibitory function; for example, several human serpins function as hormone transporters and certain serpins function as molecular chaperones or tumor suppressors.
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: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:0019886    antigen processing and presentation of exogenous peptide antigen via MHC class II    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 II protein complex. The peptide antigen is typically, but not always, processed from a whole protein.
    GO:0097067    cellular response to thyroid hormone stimulus    A change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a thyroid hormone stimulus.
    GO:0030574    collagen catabolic process    The proteolytic chemical reactions and pathways resulting in the breakdown of collagen in the extracellular matrix, usually carried out by proteases secreted by nearby cells.
    GO:0022617    extracellular matrix disassembly    A process that results in the breakdown of the extracellular matrix.
    GO:0071888    macrophage apoptotic process    Any apoptotic process in a macrophage, a mononuclear phagocyte present in a variety of tissues.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0051603    proteolysis involved in cellular protein catabolic process    The hydrolysis of a peptide bond or bonds within a protein as part of the chemical reactions and pathways resulting in the breakdown of a protein by individual cells.
    GO:0002224    toll-like receptor signaling pathway    Any series of molecular signals generated as a consequence of binding to a toll-like receptor. Toll-like receptors directly bind pattern motifs from a variety of microbial sources to initiate innate immune response.
cellular component
    GO:0036021    endolysosome lumen    The volume enclosed by the membrane of an endolysosome. An endolysosome is a transient hybrid organelle formed by fusion of a late endosome with a lysosome.
    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:0043202    lysosomal lumen    The volume enclosed within the lysosomal membrane.
    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:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

Chain I,J   (HG2A_HUMAN | P04233)
molecular function
    GO:0042289    MHC class II protein binding    Interacting selectively and non-covalently with major histocompatibility complex class II molecules; a set of molecules displayed on cell surfaces that are responsible for lymphocyte recognition and antigen presentation.
    GO:0042658    MHC class II protein binding, via antigen binding groove    Interacting selectively and non-covalently with the antigen binding groove of major histocompatibility complex class II molecules.
    GO:0023026    MHC class II protein complex binding    Interacting selectively and non-covalently with the class II major histocompatibility complex.
    GO:0001540    amyloid-beta binding    Interacting selectively and non-covalently with amyloid-beta peptide/protein and/or its precursor.
    GO:0019955    cytokine binding    Interacting selectively and non-covalently with a cytokine, any of a group of proteins that function to control the survival, growth and differentiation of tissues and cells, and which have autocrine and paracrine activity.
    GO:0004896    cytokine receptor activity    Combining with a cytokine and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity.
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0035718    macrophage migration inhibitory factor binding    Interacting selectively and non-covalently with the cytokine, macrophage migration inhibitory factor.
    GO:0050998    nitric-oxide synthase binding    Interacting selectively and non-covalently with the enzyme nitric-oxide synthase.
    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).
    GO:0044183    protein binding involved in protein folding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules) that contributes to the process of protein folding.
biological process
    GO:0045058    T cell selection    The process in which T cells that express T cell receptors that are restricted by self MHC protein complexes and tolerant to self antigens are selected for further maturation.
    GO:0000187    activation of MAPK activity    The initiation of the activity of the inactive enzyme MAP kinase (MAPK).
    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: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:0019883    antigen processing and presentation of endogenous antigen    The process in which an antigen-presenting cell expresses antigen (peptide or lipid) of endogenous origin on its cell surface in association with an MHC protein complex.
    GO:0019886    antigen processing and presentation of exogenous peptide antigen via MHC class II    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 II protein complex. The peptide antigen is typically, but not always, processed from a whole protein.
    GO:0008283    cell proliferation    The multiplication or reproduction of cells, resulting in the expansion of a cell population.
    GO:0051085    chaperone mediated protein folding requiring cofactor    The process of assisting in the correct posttranslational noncovalent assembly of proteins, which is dependent on additional protein cofactors. This process occurs over one or several cycles of nucleotide hydrolysis-dependent binding and release.
    GO:0006952    defense response    Reactions, triggered in response to the presence of a foreign body or the occurrence of an injury, which result in restriction of damage to the organism attacked or prevention/recovery from the infection caused by the attack.
    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:0016064    immunoglobulin mediated immune response    An immune response mediated by immunoglobulins, whether cell-bound or in solution.
    GO:0006886    intracellular protein transport    The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.
    GO:0050900    leukocyte migration    The movement of a leukocyte within or between different tissues and organs of the body.
    GO:0035691    macrophage migration inhibitory factor signaling pathway    A series of molecular signals initiated by the binding of macrophage migration inhibitory factor to a receptor on the surface of a cell, and ending with regulation of a downstream cellular process, e.g. transcription.
    GO:0043518    negative regulation of DNA damage response, signal transduction by p53 class mediator    Any process that stops, prevents, or reduces the frequency, rate or extent of the cascade of processes induced by the cell cycle regulator phosphoprotein p53, or an equivalent protein, in response to the detection of DNA damage.
    GO:0045581    negative regulation of T cell differentiation    Any process that stops, prevents, or reduces the frequency, rate or extent of T cell differentiation.
    GO:0043066    negative regulation of apoptotic process    Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
    GO:1902166    negative regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator    Any process that stops, prevents or reduces the frequency, rate or extent of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator.
    GO:0002906    negative regulation of mature B cell apoptotic process    Any process that stops, prevents, or reduces the frequency, rate, or extent of mature B cell apoptotic process.
    GO:0002792    negative regulation of peptide secretion    Any process that stops, prevents, or reduces the frequency, rate, or extent of peptide secretion.
    GO:0045060    negative thymic T cell selection    The process of elimination of immature T cells in the thymus which react strongly with self-antigens.
    GO:0030890    positive regulation of B cell proliferation    Any process that activates or increases the rate or extent of B cell proliferation.
    GO:0070374    positive regulation of ERK1 and ERK2 cascade    Any process that activates or increases the frequency, rate or extent of signal transduction mediated by the ERK1 and ERK2 cascade.
    GO:0045582    positive regulation of T cell differentiation    Any process that activates or increases the frequency, rate or extent of T cell differentiation.
    GO:2000343    positive regulation of chemokine (C-X-C motif) ligand 2 production    Any process that activates or increases the frequency, rate or extent of chemokine (C-X-C motif) ligand 2 production.
    GO:0001961    positive regulation of cytokine-mediated signaling pathway    Any process that activates or increases the frequency, rate or extent of a cytokine mediated signaling pathway.
    GO:0002606    positive regulation of dendritic cell antigen processing and presentation    Any process that activates or increases the frequency, rate, or extent of dendritic cell antigen processing and presentation.
    GO:0048146    positive regulation of fibroblast proliferation    Any process that activates or increases the frequency, rate or extent of multiplication or reproduction of fibroblast cells.
    GO:0060907    positive regulation of macrophage cytokine production    Any process that increases the rate, frequency or extent of macrophage cytokine production. Macrophage cytokine production is the appearance of a chemokine due to biosynthesis or secretion following a cellular stimulus, resulting in an increase in its intracellular or extracellular levels.
    GO:0090023    positive regulation of neutrophil chemotaxis    Any process that increases the frequency, rate, or extent of neutrophil chemotaxis. Neutrophil chemotaxis is the directed movement of a neutrophil cell, the most numerous polymorphonuclear leukocyte found in the blood, in response to an external stimulus, usually an infection or wounding.
    GO:0050731    positive regulation of peptidyl-tyrosine phosphorylation    Any process that activates or increases the frequency, rate or extent of the phosphorylation of peptidyl-tyrosine.
    GO:0002830    positive regulation of type 2 immune response    Any process that activates or increases the frequency, rate, or extent of a type 2 immune response.
    GO:0045059    positive thymic T cell selection    The process of sparing immature T cells in the thymus which react with self-MHC protein complexes with low affinity levels from apoptotic death.
    GO:0001516    prostaglandin biosynthetic process    The chemical reactions and pathways resulting in the formation of prostaglandins, any of a group of biologically active metabolites which contain a cyclopentane ring.
    GO:0006461    protein complex assembly    The aggregation, arrangement and bonding together of a set of components to form a protein complex.
    GO:0043030    regulation of macrophage activation    Any process that modulates the frequency or rate of macrophage activation.
    GO:0007165    signal transduction    The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
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:0042613    MHC class II protein complex    A transmembrane protein complex composed of an MHC class II alpha and MHC class II beta chain, and with or without a bound peptide or polysaccharide antigen.
    GO:0035693    NOS2-CD74 complex    A protein complex comprising nitric oxide synthase 2 and CD74. This stable complex formation is thought to prevent CD74 degradation by caspases.
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0030669    clathrin-coated endocytic vesicle membrane    The lipid bilayer surrounding a clathrin-coated endocytic vesicle.
    GO:0030666    endocytic vesicle membrane    The lipid bilayer surrounding an endocytic vesicle.
    GO:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    GO:0005789    endoplasmic reticulum membrane    The lipid bilayer surrounding the endoplasmic reticulum.
    GO:0005768    endosome    A vacuole to which materials ingested by endocytosis are delivered.
    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:0071556    integral component of lumenal side of endoplasmic reticulum membrane    The component of the endoplasmic reticulum membrane consisting of the gene products that penetrate only the lumenal side of the membrane.
    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:0005622    intracellular    The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.
    GO:0005770    late endosome    A prelysosomal endocytic organelle differentiated from early endosomes by lower lumenal pH and different protein composition. Late endosomes are more spherical than early endosomes and are mostly juxtanuclear, being concentrated near the microtubule organizing center.
    GO:0043202    lysosomal lumen    The volume enclosed within the lysosomal 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:0035692    macrophage migration inhibitory factor receptor complex    A protein complex that binds macrophage migration inhibitory factor. Comprises CD74 and CD44 cell surface proteins.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005771    multivesicular body    A type of endosome in which regions of the limiting endosomal membrane invaginate to form internal vesicles; membrane proteins that enter the internal vesicles are sequestered from the cytoplasm.
    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.
    GO:0032588    trans-Golgi network membrane    The lipid bilayer surrounding any of the compartments that make up the trans-Golgi network.
    GO:0030658    transport vesicle membrane    The lipid bilayer surrounding a transport vesicle.
    GO:0005773    vacuole    A closed structure, found only in eukaryotic cells, that is completely surrounded by unit membrane and contains liquid material. Cells contain one or several vacuoles, that may have different functions from each other. Vacuoles have a diverse array of functions. They can act as a storage organelle for nutrients or waste products, as a degradative compartment, as a cost-effective way of increasing cell size, and as a homeostatic regulator controlling both turgor pressure and pH of the cytosol.

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 Related Entries

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        CATL1_HUMAN | P077111cjl 1cs8 1mhw 2nqd 2vhs 2xu1 2xu3 2xu4 2xu5 2yj2 2yj8 2yj9 2yjb 2yjc 3bc3 3h89 3h8b 3h8c 3hha 3hwn 3iv2 3k24 3kse 3of8 3of9 4axl 4axm 5f02 5i4h 5mae 5maj 5mqy
        HG2A_HUMAN | P042331a6a 1iie 1l3h 1muj 3pdo 3pgc 3pgd 3qxa 3qxd 4aen 4ah2 4x5w 5ksu 5ksv

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