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1HLA

STRUCTURE OF THE HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN, HLA-A2

Functional Information from GO Data
ChainGOidnamespacecontents
M0000139cellular_componentGolgi membrane
M0001913biological_processT cell mediated cytotoxicity
M0001916biological_processpositive regulation of T cell mediated cytotoxicity
M0002237biological_processresponse to molecule of bacterial origin
M0002376biological_processimmune system process
M0002474biological_processantigen processing and presentation of peptide antigen via MHC class I
M0002481biological_processantigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent
M0002502biological_processpeptide antigen assembly with MHC class I protein complex
M0002503biological_processpeptide antigen assembly with MHC class II protein complex
M0002726biological_processpositive regulation of T cell cytokine production
M0005198molecular_functionstructural molecule activity
M0005515molecular_functionprotein binding
M0005576cellular_componentextracellular region
M0005615cellular_componentextracellular space
M0005765cellular_componentlysosomal membrane
M0005783cellular_componentendoplasmic reticulum
M0005788cellular_componentendoplasmic reticulum lumen
M0005794cellular_componentGolgi apparatus
M0005829cellular_componentcytosol
M0005886cellular_componentplasma membrane
M0005925cellular_componentfocal adhesion
M0006826biological_processiron ion transport
M0006879biological_processintracellular iron ion homeostasis
M0006955biological_processimmune response
M0007608biological_processsensory perception of smell
M0007611biological_processlearning or memory
M0009897cellular_componentexternal side of plasma membrane
M0009986cellular_componentcell surface
M0010038biological_processresponse to metal ion
M0010977biological_processnegative regulation of neuron projection development
M0012507cellular_componentER to Golgi transport vesicle membrane
M0016020cellular_componentmembrane
M0019885biological_processantigen processing and presentation of endogenous peptide antigen via MHC class I
M0019886biological_processantigen processing and presentation of exogenous peptide antigen via MHC class II
M0023026molecular_functionMHC class II protein complex binding
M0030670cellular_componentphagocytic vesicle membrane
M0031901cellular_componentearly endosome membrane
M0031902cellular_componentlate endosome membrane
M0031905cellular_componentearly endosome lumen
M0033077biological_processT cell differentiation in thymus
M0033572biological_processtransferrin transport
M0034756biological_processregulation of iron ion transport
M0034757biological_processnegative regulation of iron ion transport
M0035580cellular_componentspecific granule lumen
M0042026biological_processprotein refolding
M0042605molecular_functionpeptide antigen binding
M0042612cellular_componentMHC class I protein complex
M0042613cellular_componentMHC class II protein complex
M0042802molecular_functionidentical protein binding
M0042803molecular_functionprotein homodimerization activity
M0042824cellular_componentMHC class I peptide loading complex
M0045646biological_processregulation of erythrocyte differentiation
M0048260biological_processpositive regulation of receptor-mediated endocytosis
M0048261biological_processnegative regulation of receptor-mediated endocytosis
M0050680biological_processnegative regulation of epithelial cell proliferation
M0050768biological_processnegative regulation of neurogenesis
M0050778biological_processpositive regulation of immune response
M0050870biological_processpositive regulation of T cell activation
M0051289biological_processprotein homotetramerization
M0055038cellular_componentrecycling endosome membrane
M0060586biological_processmulticellular organismal-level iron ion homeostasis
M0070062cellular_componentextracellular exosome
M0071281biological_processcellular response to iron ion
M0071283biological_processcellular response to iron(III) ion
M0071316biological_processcellular response to nicotine
M1904724cellular_componenttertiary granule lumen
M1990000biological_processamyloid fibril formation
M1990712cellular_componentHFE-transferrin receptor complex
M2000774biological_processpositive regulation of cellular senescence
M2000978biological_processnegative regulation of forebrain neuron differentiation
Functional Information from PROSITE/UniProt
site_idPS00290
Number of Residues7
DetailsIG_MHC Immunoglobulins and major histocompatibility complex proteins signature. YTCHVQH
ChainResidueDetails
ATYR257-HIS263
MTYR78-HIS84

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues89
DetailsRegion: {"description":"Alpha-1","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues91
DetailsRegion: {"description":"Alpha-2","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues6
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"21943705","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"21543847","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues1
DetailsModified residue: {"description":"Sulfotyrosine","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"19159218","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues88
DetailsDomain: {"description":"Ig-like C1-type"}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues1
DetailsModified residue: {"description":"Pyrrolidone carboxylic acid; in form pI 5.3","evidences":[{"source":"PubMed","id":"7554280","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (Glc) (glycation) isoleucine; in hemodialysis-associated amyloidosis","evidences":[{"source":"PubMed","id":"7918443","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues6
DetailsGlycosylation: {"description":"N-linked (Glc) (glycation) lysine; in vitro","evidences":[{"source":"PubMed","id":"7918443","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

239803

PDB entries from 2025-08-06

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