Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Entry version 191 (18 Sep 2019)
Sequence version 2 (22 Aug 2003)
Previous versions | rss
Help videoAdd a publicationFeedback
Protein

HLA class I histocompatibility antigen, A-3 alpha chain

Gene

HLA-A

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Antigen-presenting major histocompatibility complex class I (MHCI) molecule, HLA-A*03 serotype. In complex with B2M/beta 2 microglobulin displays primarily viral and tumor-derived peptides on antigen-presenting cells for recognition by alpha-beta T cell receptor (TCR) on HLA-A*03-restricted CD8-positive T cells, guiding antigen-specific T cell immune response to eliminate infected or transformed cells (PubMed:2456340, PubMed:7504010, PubMed:7679507, PubMed:9862734, PubMed:19543285, PubMed:21943705). May also present self-peptides derived from the signal sequence of secreted or membrane proteins, although T cells specific for these peptides are usually inactivated to prevent autoreactivity (PubMed:7679507). Both the peptide and the MHC molecule are recognized by TCR, the peptide is responsible for the fine specificity of antigen recognition and MHC residues account for the MHC restriction of T cells. Typically presents intracellular peptide antigens of 8 to 11 amino acids that arise from cytosolic proteolysis via IFNG-induced immunoproteasome (PubMed:27049119). Can bind different peptides that share a common structural motif defined by the nature of the peptide anchor residues. HLA-A*03:01 presents viral epitopes derived from IAV NP (ILRGSVAHK), HIV-1 nef (QVPLRPMTYK), HIV-1 gag-pol (AIFQSSMTK) as well tumor peptide antigens including PMEL (LIYRRRLMK), NODAL (HAYIQSLLK), TRP-2 (RMYNMVPFF), all having in common hydrophobic amino acids at position 2 and LYS or ARG anchor residues at C-terminal (PubMed:7504010, PubMed:7679507, PubMed:9862734, PubMed:19543285, PubMed:21943705). May also display spliced peptides resulting from the ligation of two separate proteasomal cleavage products that are not contiguous in the parental protein (PubMed:27049119).7 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei31Pathogen-derived peptide antigen1 Publication1
Binding sitei97Pathogen-derived peptide antigen1 Publication1
Binding sitei108Pathogen-derived peptide antigen1 Publication1
Binding sitei140Self-peptide antigen1 Publication1
Binding sitei167Pathogen-derived peptide antigen1 Publication1
Binding sitei170Pathogen-derived peptide antigen1 Publication1
Binding sitei183Self- and pathogen-derived peptide antigen2 Publications1
Binding sitei195Pathogen-derived peptide antigen1 Publication1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Biological processImmunity

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-HSA-1236974 ER-Phagosome pathway
R-HSA-1236977 Endosomal/Vacuolar pathway
R-HSA-198933 Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell
R-HSA-877300 Interferon gamma signaling
R-HSA-8866654 E3 ubiquitin ligases ubiquitinate target proteins
R-HSA-909733 Interferon alpha/beta signaling
R-HSA-983170 Antigen Presentation: Folding, assembly and peptide loading of class I MHC

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
HLA class I histocompatibility antigen, A-3 alpha chain
Alternative name(s):
Human leukocyte antigen A*03
Short name:
HLA-A*031 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:HLA-AImported
Synonyms:HLAA
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiHomo sapiens (Human)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9606 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000005640 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 6

Organism-specific databases

Human Gene Nomenclature Database

More...
HGNCi
HGNC:4931 HLA-A

Online Mendelian Inheritance in Man (OMIM)

More...
MIMi
142800 gene

neXtProt; the human protein knowledge platform

More...
neXtProti
NX_P04439

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini25 – 308ExtracellularSequence analysisAdd BLAST284
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei309 – 332HelicalSequence analysisAdd BLAST24
Topological domaini333 – 365CytoplasmicSequence analysisAdd BLAST33

Keywords - Cellular componenti

Cell membrane, Endoplasmic reticulum, Membrane, MHC I

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the ‘Pathology and Biotech’ section provides information on the disease(s) associated with genetic variations in a given protein. The information is extracted from the scientific literature and diseases that are also described in the <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=omim">OMIM</a> database are represented with a <a href="http://www.uniprot.org/diseases">controlled vocabulary</a> in the following way:<p><a href='/help/involvement_in_disease' target='_top'>More...</a></p>Involvement in diseasei

HLA-A*03:01 allele increases the susceptibility to multiple sclerosis (MS), an autoimmune disease of the central nervous system (PubMed:10746785). Proposed to contribute to the initiation phase of the disease by presenting myelin PLP1 self-peptide (KLIETYFSK) to autoreactive CD8-positive T cells capable of initiating the first autoimmune attacks (PubMed:18953350).2 Publications

Organism-specific databases

DisGeNET

More...
DisGeNETi
3105

MalaCards human disease database

More...
MalaCardsi
HLA-A

Open Targets

More...
OpenTargetsi
ENSG00000206503

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...
PharmGKBi
PA35055

Chemistry databases

ChEMBL database of bioactive drug-like small molecules

More...
ChEMBLi
CHEMBL2632

Drug and drug target database

More...
DrugBanki
DB11294 Coccidioides immitis spherule
DB06226 Nelipepimut-S

Polymorphism and mutation databases

BioMuta curated single-nucleotide variation and disease association database

More...
BioMutai
HLA-A

Domain mapping of disease mutations (DMDM)

More...
DMDMi
34223717

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 24Add BLAST24
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000001881525 – 365HLA class I histocompatibility antigen, A-3 alpha chainAdd BLAST341

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi110N-linked (GlcNAc...) asparagineBy similarity1
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi125 ↔ 188PROSITE-ProRule annotation2 Publications
Disulfide bondi227 ↔ 283PROSITE-ProRule annotation2 Publications
<p>This subsection of the ‘PTM / Processing’ section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei343PhosphoserineBy similarity1
Modified residuei344PhosphotyrosineBy similarity1
Modified residuei349PhosphoserineBy similarity1
Modified residuei350PhosphoserineBy similarity1
Modified residuei352PhosphoserineCombined sources1
Modified residuei356PhosphoserineCombined sources1
Modified residuei359PhosphoserineCombined sources1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Polyubiquitinated in a post ER compartment by interaction with human herpesvirus 8 MIR1 protein. This targets the protein for rapid degradation via the ubiquitin system.By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein, Ubl conjugation

Proteomic databases

Encyclopedia of Proteome Dynamics

More...
EPDi
P04439

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
P04439

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...
MassIVEi
P04439

MaxQB - The MaxQuant DataBase

More...
MaxQBi
P04439

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
P04439

PeptideAtlas

More...
PeptideAtlasi
P04439

PRoteomics IDEntifications database

More...
PRIDEi
P04439

ProteomicsDB human proteome resource

More...
ProteomicsDBi
51714

PTM databases

GlyConnect protein glycosylation platform

More...
GlyConnecti
1324

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
P04439

SwissPalm database of S-palmitoylation events

More...
SwissPalmi
P04439

Miscellaneous databases

CutDB - Proteolytic event database

More...
PMAP-CutDBi
P04439

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the ‘Expression’ section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified ‘at protein level’. <br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Ubiquitous.Curated

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSG00000206503 Expressed in 239 organ(s), highest expression level in mononuclear cell

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
P04439 baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
P04439 HS

Organism-specific databases

Human Protein Atlas

More...
HPAi
CAB078470

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Heterotrimer that consists of an alpha chain HLA-A*03, a beta chain B2M and a peptide (peptide-HLA-A*03-B2M) (PubMed:7504010, PubMed:7679507, PubMed:21943705). Early in biogenesis, HLA-A-B2M dimer interacts with the components of the peptide-loading complex composed of TAPBP, TAP1-TAP2, TAPBPL, PDIA3/ERP57 and CALR.

Interacts with TAP1-TAP2 transporter via TAPBP; this interaction is obligatory for the loading of peptide epitopes delivered to the ER by TAP1-TAP2 transporter.

Interacts with TAPBPL; TAPBPL binds peptide-free HLA-A-B2M complexes or those loaded with low affinity peptides, likely facilitating peptide exchange for higher affinity peptides. Only optimally assembled peptide-HLA-B2M trimer translocates to the surface of antigen-presenting cells, where it interacts with TCR and CD8 coreceptor on the surface of T cells. HLA-A (via polymorphic alpha-1 and alpha-2 domains) interacts with antigen-specific TCR (via CDR3 domains). One HLA-A molecule (mainly via nonpolymorphic alpha-3 domain) interacts with one CD8A homodimer (via CDR-like loop); this interaction insures peptide-HLA-A-B2M recognition by CD8-positive T cells only (By similarity).

By similarity3 Publications

GO - Molecular functioni

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

More...
BioGridi
109350, 106 interactors

Protein interaction database and analysis system

More...
IntActi
P04439, 30 interactors

Molecular INTeraction database

More...
MINTi
P04439

STRING: functional protein association networks

More...
STRINGi
9606.ENSP00000379873

Chemistry databases

BindingDB database of measured binding affinities

More...
BindingDBi
P04439

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

1365
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
P04439

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini209 – 295Ig-like C1-typeAdd BLAST87

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni25 – 114Alpha-1Add BLAST90
Regioni115 – 206Alpha-2Add BLAST92
Regioni207 – 298Alpha-3Add BLAST92
Regioni299 – 308Connecting peptide10

<p>This subsection of the ‘Family and domains’ section provides general information on the biological role of a domain. The term ‘domain’ is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The alpha-1 domain is a structural part of the peptide-binding cleft.1 Publication
The alpha-2 domain is a structural part of the peptide-binding cleft (PubMed:21543847, PubMed:21943705). Mediates the interaction with TAP1-TAP2 complex (By similarity).By similarity2 Publications
The alpha-3 Ig-like domain mediates the interaction with CD8 coreceptor.By similarity

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the MHC class I family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG410II5V Eukaryota
ENOG4111K8F LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00970000193340

Database of Orthologous Groups

More...
OrthoDBi
1390181at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P04439

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.60.40.10, 1 hit
3.30.500.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR007110 Ig-like_dom
IPR036179 Ig-like_dom_sf
IPR013783 Ig-like_fold
IPR003006 Ig/MHC_CS
IPR003597 Ig_C1-set
IPR011161 MHC_I-like_Ag-recog
IPR037055 MHC_I-like_Ag-recog_sf
IPR011162 MHC_I/II-like_Ag-recog
IPR001039 MHC_I_a_a1/a2
IPR010579 MHC_I_a_C

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF07654 C1-set, 1 hit
PF00129 MHC_I, 1 hit
PF06623 MHC_I_C, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01638 MHCCLASSI

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00407 IGc1, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF48726 SSF48726, 1 hit
SSF54452 SSF54452, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50835 IG_LIKE, 1 hit
PS00290 IG_MHC, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

This entry has 1 described isoform and 47 potential isoforms that are computationally mapped.Show allAlign All

P04439-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAVMAPRTLL LLLSGALALT QTWAGSHSMR YFFTSVSRPG RGEPRFIAVG
60 70 80 90 100
YVDDTQFVRF DSDAASQRME PRAPWIEQEG PEYWDQETRN VKAQSQTDRV
110 120 130 140 150
DLGTLRGYYN QSEAGSHTIQ IMYGCDVGSD GRFLRGYRQD AYDGKDYIAL
160 170 180 190 200
NEDLRSWTAA DMAAQITKRK WEAAHEAEQL RAYLDGTCVE WLRRYLENGK
210 220 230 240 250
ETLQRTDPPK THMTHHPISD HEATLRCWAL GFYPAEITLT WQRDGEDQTQ
260 270 280 290 300
DTELVETRPA GDGTFQKWAA VVVPSGEEQR YTCHVQHEGL PKPLTLRWEL
310 320 330 340 350
SSQPTIPIVG IIAGLVLLGA VITGAVVAAV MWRRKSSDRK GGSYTQAASS
360
DSAQGSDVSL TACKV
Length:365
Mass (Da):40,841
Last modified:August 22, 2003 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iDEDFCEC4450E0580
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 47 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
P018921A02_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P304431A01_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P018911A68_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P137461A11_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P055341A24_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P161881A30_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P304501A26_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P103141A32_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P304531A34_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
P304591A74_HUMAN
HLA class I histocompatibility anti...
HLA-A HLAA
365Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
There are more potential isoformsShow all

<p>This subsection of the ‘Sequence’ section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence CAA25162 differs from that shown. Reason: Erroneous gene model prediction.1 Publication

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Sequence’ section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti1M → MARGDQ in CAA25162 (PubMed:6609814).Curated1
Sequence conflicti319G → A in AAB66582 (PubMed:10079303).Curated1

<p>This subsection of the ‘Sequence’ section provides information on polymorphic variants. If the variant is associated with a disease state, the description of the latter can be found in the <a href="http://www.uniprot.org/manual/involvement_in_disease">'Involvement in disease'</a> subsection.<p><a href='/help/polymorphism' target='_top'>More...</a></p>Polymorphismi

The HLA-A*03 allele group comprises at least 334 different alleles. The sequence shown is that of HLA-A*03:01.Curated

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Sequence’ section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural variantiVAR_05031089R → G. Corresponds to variant dbSNP:rs199474430Ensembl.1
Natural variantiVAR_05031194Q → H. Corresponds to variant dbSNP:rs78306866Ensembl.1
Natural variantiVAR_050312101D → N. Corresponds to variant dbSNP:rs1136688Ensembl.1
Natural variantiVAR_050313121I → M. Corresponds to variant dbSNP:rs1136695Ensembl.1
Natural variantiVAR_050314129S → P. Corresponds to variant dbSNP:rs1136700Ensembl.1
Natural variantiVAR_050315131G → W. Corresponds to variant dbSNP:rs1136702Ensembl.1
Natural variantiVAR_050316133F → L. Corresponds to variant dbSNP:rs1059488Ensembl.1
Natural variantiVAR_050317151N → K. Corresponds to variant dbSNP:rs1059509Ensembl.1
Natural variantiVAR_050318166I → TCombined sourcesCorresponds to variant dbSNP:rs1059516Ensembl.1
Natural variantiVAR_050319169R → H. Corresponds to variant dbSNP:rs1059520Ensembl.1
Natural variantiVAR_004351176E → V in allele A*03:02; results in inefficient A*03:02-restricted T cell recognition of epitopes derived from influenza A virus.. 1 PublicationCorresponds to variant dbSNP:rs9256983Ensembl.1
Natural variantiVAR_004352180L → Q in allele A*03:02. 1
Natural variantiVAR_016604185D → E in allele A*03:05. Corresponds to variant dbSNP:rs1059542Ensembl.1
Natural variantiVAR_033149186G → A in allele A*03:06. Corresponds to variant dbSNP:rs41545519Ensembl.1
Natural variantiVAR_016605199G → R in allele A*03:04. Corresponds to variant dbSNP:rs41559916Ensembl.1
Natural variantiVAR_050320205R → H. Corresponds to variant dbSNP:rs17185861Ensembl.1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AF015930 mRNA Translation: AAB66582.1
X00492 Genomic DNA Translation: CAA25162.1 Sequence problems.
AH009116 Genomic DNA Translation: AAF29557.1
AL671277 Genomic DNA No translation available.
U32184 mRNA Translation: AAB63980.1
AF217561 mRNA Translation: AAF28734.1
AH008295 Genomic DNA Translation: AAF03243.1
AJ401085 Genomic DNA Translation: CAC06086.1
AJ401086 Genomic DNA Translation: CAC06087.1
AJ401087 Genomic DNA Translation: CAC06088.1
AJ748743 Genomic DNA Translation: CAG38621.1
BA000025 Genomic DNA Translation: BAB63400.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS34373.1

Protein sequence database of the Protein Information Resource

More...
PIRi
A02192 HLHUA3

NCBI Reference Sequences

More...
RefSeqi
NP_002107.3, NM_002116.7

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENST00000376809; ENSP00000366005; ENSG00000206503
ENST00000396634; ENSP00000379873; ENSG00000206503

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
3105

Keywords - Coding sequence diversityi

Polymorphism

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

<p>This subsection of the <a href="http://www.uniprot.org/manual/cross_references_section">Cross-references</a> section provides links to various web resources that are relevant for a specific protein.<p><a href='/help/web_resource' target='_top'>More...</a></p>Web resourcesi

IPD-IMGT/HLA

Immuno Polymorphism Database-ImMunoGeneTics/HLA

IEDB

The Immune Epitope Database

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF015930 mRNA Translation: AAB66582.1
X00492 Genomic DNA Translation: CAA25162.1 Sequence problems.
AH009116 Genomic DNA Translation: AAF29557.1
AL671277 Genomic DNA No translation available.
U32184 mRNA Translation: AAB63980.1
AF217561 mRNA Translation: AAF28734.1
AH008295 Genomic DNA Translation: AAF03243.1
AJ401085 Genomic DNA Translation: CAC06086.1
AJ401086 Genomic DNA Translation: CAC06087.1
AJ401087 Genomic DNA Translation: CAC06088.1
AJ748743 Genomic DNA Translation: CAG38621.1
BA000025 Genomic DNA Translation: BAB63400.1
CCDSiCCDS34373.1
PIRiA02192 HLHUA3
RefSeqiNP_002107.3, NM_002116.7

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
2XPGX-ray2.60A25-298[»]
3RL1X-ray2.00A25-298[»]
3RL2X-ray2.39A25-298[»]
6ENYelectron microscopy5.80F25-365[»]
SMRiP04439
ModBaseiSearch...

Protein-protein interaction databases

BioGridi109350, 106 interactors
IntActiP04439, 30 interactors
MINTiP04439
STRINGi9606.ENSP00000379873

Chemistry databases

BindingDBiP04439
ChEMBLiCHEMBL2632
DrugBankiDB11294 Coccidioides immitis spherule
DB06226 Nelipepimut-S

PTM databases

GlyConnecti1324
iPTMnetiP04439
SwissPalmiP04439

Polymorphism and mutation databases

BioMutaiHLA-A
DMDMi34223717

Proteomic databases

EPDiP04439
jPOSTiP04439
MassIVEiP04439
MaxQBiP04439
PaxDbiP04439
PeptideAtlasiP04439
PRIDEiP04439
ProteomicsDBi51714

Protocols and materials databases

ABCD curated depository of sequenced antibodies

More...
ABCDi
P04439

The DNASU plasmid repository

More...
DNASUi
3105
Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENST00000376809; ENSP00000366005; ENSG00000206503
ENST00000396634; ENSP00000379873; ENSG00000206503
GeneIDi3105

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
3105
DisGeNETi3105

GeneCards: human genes, protein and diseases

More...
GeneCardsi
HLA-A
HGNCiHGNC:4931 HLA-A
HPAiCAB078470
MalaCardsiHLA-A
MIMi142800 gene
neXtProtiNX_P04439
OpenTargetsiENSG00000206503
PharmGKBiPA35055

GenAtlas: human gene database

More...
GenAtlasi
Search...

Phylogenomic databases

eggNOGiENOG410II5V Eukaryota
ENOG4111K8F LUCA
GeneTreeiENSGT00970000193340
OrthoDBi1390181at2759
PhylomeDBiP04439

Enzyme and pathway databases

ReactomeiR-HSA-1236974 ER-Phagosome pathway
R-HSA-1236977 Endosomal/Vacuolar pathway
R-HSA-198933 Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell
R-HSA-877300 Interferon gamma signaling
R-HSA-8866654 E3 ubiquitin ligases ubiquitinate target proteins
R-HSA-909733 Interferon alpha/beta signaling
R-HSA-983170 Antigen Presentation: Folding, assembly and peptide loading of class I MHC

Miscellaneous databases

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...
ChiTaRSi
HLA-A human

The Gene Wiki collection of pages on human genes and proteins

More...
GeneWikii
HLA-A

Database of phenotypes from RNA interference screens in Drosophila and Homo sapiens

More...
GenomeRNAii
3105

Pharos

More...
Pharosi
P04439
PMAP-CutDBiP04439

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSG00000206503 Expressed in 239 organ(s), highest expression level in mononuclear cell
ExpressionAtlasiP04439 baseline and differential
GenevisibleiP04439 HS

Family and domain databases

Gene3Di2.60.40.10, 1 hit
3.30.500.10, 1 hit
InterProiView protein in InterPro
IPR007110 Ig-like_dom
IPR036179 Ig-like_dom_sf
IPR013783 Ig-like_fold
IPR003006 Ig/MHC_CS
IPR003597 Ig_C1-set
IPR011161 MHC_I-like_Ag-recog
IPR037055 MHC_I-like_Ag-recog_sf
IPR011162 MHC_I/II-like_Ag-recog
IPR001039 MHC_I_a_a1/a2
IPR010579 MHC_I_a_C
PfamiView protein in Pfam
PF07654 C1-set, 1 hit
PF00129 MHC_I, 1 hit
PF06623 MHC_I_C, 1 hit
PRINTSiPR01638 MHCCLASSI
SMARTiView protein in SMART
SM00407 IGc1, 1 hit
SUPFAMiSSF48726 SSF48726, 1 hit
SSF54452 SSF54452, 1 hit
PROSITEiView protein in PROSITE
PS50835 IG_LIKE, 1 hit
PS00290 IG_MHC, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry namei1A03_HUMAN
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P04439
Secondary accession number(s): O19546
, O19756, Q65A82, Q9GJE6, Q9GJE7, Q9GJE8, Q9MYE6, Q9MYG4, Q9TPR8
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 13, 1987
Last sequence update: August 22, 2003
Last modified: September 18, 2019
This is version 191 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
  3. Human chromosome 6
    Human chromosome 6: entries, gene names and cross-references to MIM
  4. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  5. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  6. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again