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UniProtKB - P01891 (1A68_HUMAN)

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Protein

HLA class I histocompatibility antigen, A-68 alpha chain

Gene

HLA-A

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Involved in the presentation of foreign antigens to the immune system.

GO - Molecular functioni

  • beta-2-microglobulin binding Source: UniProtKB
  • peptide antigen binding Source: UniProtKB
  • receptor binding Source: GO_Central
  • RNA binding Source: UniProtKB
View the complete GO annotation on QuickGO ...

GO - Biological processi

View the complete GO annotation on QuickGO ...

Keywordsi

Biological processHost-virus interaction, Immunity

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-909733. Interferon alpha/beta signaling.
R-HSA-983170. Antigen Presentation: Folding, assembly and peptide loading of class I MHC.

Names & Taxonomyi

Protein namesi
Recommended name:
HLA class I histocompatibility antigen, A-68 alpha chain
Alternative name(s):
Aw-68
HLA class I histocompatibility antigen, A-28 alpha chain
MHC class I antigen A*68
Gene namesi
Name:HLA-A
Synonyms:HLAA
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo
Proteomesi
  • UP000005640 Componenti: Chromosome 6

Organism-specific databases

HGNCiHGNC:4931. HLA-A.
MIMi142800. gene.
neXtProtiNX_P01891.

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; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini25 – 308ExtracellularSequence analysisAdd BLAST284
Transmembranei309 – 332HelicalSequence analysisAdd BLAST24
Topological domaini333 – 365CytoplasmicSequence analysisAdd BLAST33

Keywords - Cellular componenti

Membrane, MHC I

Pathology & Biotechi

Organism-specific databases

DisGeNETi3105.
MalaCardsiHLA-A.

Polymorphism and mutation databases

DMDMi13124681.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 241 PublicationAdd BLAST24
ChainiPRO_000001883025 – 365HLA class I histocompatibility antigen, A-68 alpha chainAdd BLAST341

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Glycosylationi110N-linked (GlcNAc...) asparagine1 Publication1
Disulfide bondi125 ↔ 188
Disulfide bondi227 ↔ 283
Modified residuei343PhosphoserineBy similarity1
Modified residuei344PhosphotyrosineBy similarity1
Modified residuei345PhosphoserineBy similarity1
Modified residuei349PhosphoserineBy similarity1
Modified residuei350PhosphoserineCombined sources1
Modified residuei352PhosphoserineCombined sources1
Modified residuei356PhosphoserineCombined sources1
Modified residuei359PhosphoserineCombined sources1

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).By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein, Ubl conjugation

Proteomic databases

EPDiP01891.
MaxQBiP01891.
PeptideAtlasiP01891.
PRIDEiP01891.

PTM databases

iPTMnetiP01891.
SwissPalmiP01891.

Expressioni

Gene expression databases

CleanExiHS_HLA-A.

Interactioni

Subunit structurei

Heterodimer of an alpha chain and a beta chain (beta-2-microglobulin). Interacts with human herpesvirus 8 MIR1 protein (By similarity).By similarity

GO - Molecular functioni

  • beta-2-microglobulin binding Source: UniProtKB
  • receptor binding Source: GO_Central
View the complete GO annotation on QuickGO ...

Protein-protein interaction databases

IntActiP01891. 8 interactors.
MINTiP01891.

Structurei

Secondary structure

1365
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Beta strandi27 – 36Combined sources10
Beta strandi41 – 43Combined sources3
Beta strandi45 – 52Combined sources8
Beta strandi55 – 61Combined sources7
Beta strandi64 – 66Combined sources3
Helixi74 – 76Combined sources3
Helixi81 – 108Combined sources28
Beta strandi113 – 115Combined sources3
Beta strandi118 – 127Combined sources10
Beta strandi133 – 142Combined sources10
Beta strandi145 – 150Combined sources6
Beta strandi157 – 159Combined sources3
Helixi162 – 173Combined sources12
Helixi176 – 185Combined sources10
Helixi187 – 198Combined sources12
Helixi200 – 203Combined sources4
Beta strandi210 – 235Combined sources26
Beta strandi238 – 243Combined sources6
Beta strandi246 – 248Combined sources3
Beta strandi252 – 254Combined sources3
Beta strandi261 – 263Combined sources3
Beta strandi265 – 274Combined sources10
Helixi278 – 280Combined sources3
Beta strandi281 – 286Combined sources6
Beta strandi290 – 292Combined sources3
Beta strandi294 – 296Combined sources3

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1HSBX-ray1.90A25-294[»]
1TMCX-ray2.30A25-199[»]
2HLAX-ray2.60A25-294[»]
4HWZX-ray2.40A25-298[»]
4HX1X-ray1.80A25-296[»]
4I48X-ray2.80A25-296[»]
6EI2X-ray1.61A25-299[»]
ProteinModelPortaliP01891.
SMRiP01891.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP01891.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini209 – 295Ig-like C1-typeAdd BLAST87

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni25 – 114Alpha-1Add BLAST90
Regioni115 – 206Alpha-2Add BLAST92
Regioni207 – 298Alpha-3Add BLAST92
Regioni299 – 308Connecting peptide10

Sequence similaritiesi

Belongs to the MHC class I family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

HOVERGENiHBG016709.
InParanoidiP01891.
PhylomeDBiP01891.

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.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P01891-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAVMAPRTLV LLLSGALALT QTWAGSHSMR YFYTSVSRPG RGEPRFIAVG 
        60         70         80         90        100
YVDDTQFVRF DSDAASQRME PRAPWIEQEG PEYWDRNTRN VKAQSQTDRV 
       110        120        130        140        150
DLGTLRGYYN QSEAGSHTIQ MMYGCDVGSD GRFLRGYRQD AYDGKDYIAL 
       160        170        180        190        200
KEDLRSWTAA DMAAQTTKHK WEAAHVAEQW RAYLEGTCVE WLRRYLENGK 
       210        220        230        240        250
ETLQRTDAPK THMTHHAVSD HEATLRCWAL SFYPAEITLT WQRDGEDQTQ 
       260        270        280        290        300
DTELVETRPA GDGTFQKWVA VVVPSGQEQR YTCHVQHEGL PKPLTLRWEP 
       310        320        330        340        350
SSQPTIPIVG IIAGLVLFGA VITGAVVAAV MWRRKSSDRK GGSYSQAASS 
       360 
DSAQGSDVSL TACKV
Length:365
Mass (Da):40,909
Last modified:February 21, 2001 - v4
Checksum:i78539C59DB8B1DFC
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti206T → A in AAF74211 (PubMed:10803837).Curated1
Sequence conflicti231S → G AA sequence (PubMed:6179086).Curated1

Polymorphismi

The following alleles of A-68 are known: A*68:01 (Aw68.1), A*68:02, A*68:03. A*68:04, A*68:05, A*68:06, A*68:07, A*68:08, A*68:09, A*68:10, A*68:16 and A*68:17. The sequence shown is that of A*68:01.Curated

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_00438936V → M in allele A*68:02. 3 Publications1
Natural variantiVAR_01036286 – 87RN → EE in allele A*68:10. 1 Publication2
Natural variantiVAR_05630489R → G. Corresponds to variant dbSNP:rs199474430Ensembl.1
Natural variantiVAR_01036394Q → H in allele A*68:03, allele A*68:04 and allele A*68:05. 3 PublicationsCorresponds to variant dbSNP:rs78306866Ensembl.1
Natural variantiVAR_01036497T → I in allele A*68:04. 1
Natural variantiVAR_01036598D → H in allele A*68:05. 1
Natural variantiVAR_056305101D → N. Corresponds to variant dbSNP:rs1136688Ensembl.1
Natural variantiVAR_004390121M → R in allele A*68:02. 3 Publications1
Natural variantiVAR_004391129S → P in allele A*68:02. 3 PublicationsCorresponds to variant dbSNP:rs1136700Ensembl.1
Natural variantiVAR_056306133F → L. Corresponds to variant dbSNP:rs1059488Ensembl.1
Natural variantiVAR_010366138R → E in allele A*68:06; requires 2 nucleotide substitutions. 1 Publication1
Natural variantiVAR_004392138R → H in allele A*68:02. 3 Publications1
Natural variantiVAR_010367140D → H in allele A*68:06 and allele A*68:07. 1 Publication1
Natural variantiVAR_010368140D → V in allele A*68:17. 2 Publications1
Natural variantiVAR_004393140D → Y in allele A*68:02. 3 Publications1
Natural variantiVAR_010369175H → L in allele A*68:16. 1 Publication1
Natural variantiVAR_010370180W → L in allele A*68:08. 1 Publication1
Natural variantiVAR_010371180W → Q in allele A*68:09; requires 2 nucleotide substitutions. 1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U03861 mRNA. Translation: AAA03602.1.
X03070 Genomic DNA. Translation: CAB56605.1.
X03071 Genomic DNA. Translation: CAB56606.1.
U41057 mRNA. Translation: AAB41292.1.
AJ315642 Genomic DNA. Translation: CAC44382.1.
AF144013 Genomic DNA. Translation: AAF74211.1.
AJ245567 Genomic DNA. Translation: CAB59722.1.
AH005127 Genomic DNA. Translation: AAB50567.1.
U89946 Genomic DNA. Translation: AAB82079.1.
U89947 Genomic DNA. Translation: AAB82080.1.
AJ001274 mRNA. Translation: CAA04647.1.
AH006296 Genomic DNA. Translation: AAC25782.1.
AH007538 Genomic DNA. Translation: AAD22270.1.
AH007605 Genomic DNA. Translation: AAD27539.1.
AJ223972 Genomic DNA. Translation: CAA11708.1.
AH007201 Genomic DNA. Translation: AAD02208.1.
AH009406 Genomic DNA. Translation: AAF73477.1.
PIRiA02187. HLHU28.
A24671. HLHUAW.
I38441.
UniGeneiHs.181244.
Hs.713441.

Genome annotation databases

EnsembliENST00000457879; ENSP00000403575; ENSG00000235657.

Keywords - Coding sequence diversityi

Polymorphism

Similar proteinsi

Entry informationi

Entry namei1A68_HUMAN
AccessioniPrimary (citable) accession number: P01891
Secondary accession number(s): O19673
, O19695, O19794, O19795, O43907, O77938, O98010, P10315, P79505, Q9MYA5, Q9MYC4, Q9TQG7, Q9TQN5, Q9UIN2
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: February 21, 2001
Last modified: March 28, 2018
This is version 176 of the entry and version 4 of the sequence. See complete history.
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.

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome