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Q9TQE0

- 2B19_HUMAN

UniProt

Q9TQE0 - 2B19_HUMAN

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Protein
HLA class II histocompatibility antigen, DRB1-9 beta chain
Gene
HLA-DRB1
Organism
Homo sapiens (Human)
Status
Reviewed - Annotation score: 5 out of 5 - Experimental evidence at protein leveli

Functioni

Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route; where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules; and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments; exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides; autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs; other cells of the gastrointestinal tract; such as epithelial cells; express MHC class II molecules and CD74 and act as APCs; which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen; three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form a heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs; CD74 undergoes a sequential degradation by various proteases; including CTSS and CTSL; leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B-cells; the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal microenvironment has been implicated in the regulation of antigen loading into MHC II molecules; increased acidification produces increased proteolysis and efficient peptide loading.

GO - Molecular functioni

  1. peptide antigen binding Source: UniProtKB

GO - Biological processi

  1. T cell costimulation Source: Reactome
  2. T cell receptor signaling pathway Source: Reactome
  3. T-helper 1 type immune response Source: UniProtKB
  4. antigen processing and presentation of exogenous peptide antigen via MHC class II Source: Reactome
  5. cytokine-mediated signaling pathway Source: Reactome
  6. detection of bacterium Source: UniProtKB
  7. humoral immune response mediated by circulating immunoglobulin Source: UniProtKB
  8. immune response Source: UniProtKB
  9. immunoglobulin production involved in immunoglobulin mediated immune response Source: UniProtKB
  10. inflammatory response to antigenic stimulus Source: UniProtKB
  11. interferon-gamma-mediated signaling pathway Source: Reactome
  12. negative regulation of T cell proliferation Source: UniProtKB
  13. negative regulation of interferon-gamma production Source: UniProtKB
  14. positive regulation of insulin secretion involved in cellular response to glucose stimulus Source: UniProtKB
  15. protein tetramerization Source: UniProtKB
  16. regulation of interleukin-10 secretion Source: UniProtKB
  17. regulation of interleukin-4 production Source: UniProtKB
Complete GO annotation...

Keywords - Biological processi

Immunity

Enzyme and pathway databases

ReactomeiREACT_121399. MHC class II antigen presentation.
REACT_12555. Downstream TCR signaling.
REACT_12582. Phosphorylation of CD3 and TCR zeta chains.
REACT_12596. Translocation of ZAP-70 to Immunological synapse.
REACT_12623. Generation of second messenger molecules.
REACT_19324. PD-1 signaling.
REACT_25078. Interferon gamma signaling.

Names & Taxonomyi

Protein namesi
Recommended name:
HLA class II histocompatibility antigen, DRB1-9 beta chain
Alternative name(s):
MHC class II antigen DRB1*9
Short name:
DR-9
Short name:
DR9
Gene namesi
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
ProteomesiUP000005640: Unplaced

Organism-specific databases

HGNCiHGNC:4948. HLA-DRB1.

Subcellular locationi

Cell membrane; Single-pass type I membrane protein. Endoplasmic reticulum membrane; Single-pass type I membrane protein. Golgi apparatustrans-Golgi network membrane; Single-pass type I membrane protein. Endosome membrane; Single-pass type I membrane protein. Lysosome membrane; Single-pass type I membrane protein. Late endosome membrane; Single-pass type I membrane protein
Note: The MHC class II complex transits through a number of intracellular compartments in the endocytic pathway until it reaches the cell membrane for antigen presentation.1 Publication

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Topological domaini30 – 227198Extracellular Reviewed prediction
Add
BLAST
Transmembranei228 – 25023Helical; Reviewed prediction
Add
BLAST
Topological domaini251 – 26616Cytoplasmic Reviewed prediction
Add
BLAST

GO - Cellular componenti

  1. ER to Golgi transport vesicle membrane Source: Reactome
  2. Golgi membrane Source: Reactome
  3. MHC class II protein complex Source: UniProtKB-KW
  4. clathrin-coated endocytic vesicle membrane Source: Reactome
  5. endocytic vesicle membrane Source: Reactome
  6. external side of plasma membrane Source: UniProtKB
  7. extracellular space Source: UniProt
  8. integral component of lumenal side of endoplasmic reticulum membrane Source: Reactome
  9. late endosome membrane Source: UniProtKB
  10. lysosomal membrane Source: UniProtKB
  11. plasma membrane Source: Reactome
  12. trans-Golgi network membrane Source: Reactome
  13. transport vesicle membrane Source: Reactome
Complete GO annotation...

Keywords - Cellular componenti

Cell membrane, Endoplasmic reticulum, Endosome, Golgi apparatus, Lysosome, Membrane, MHC II

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Signal peptidei1 – 2929
Add
BLAST
Chaini30 – 266237HLA class II histocompatibility antigen, DRB1-9 beta chain
PRO_0000018953Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Disulfide bondi44 ↔ 108 By similarity
Glycosylationi48 – 481N-linked (GlcNAc...) Reviewed prediction
Disulfide bondi146 ↔ 202 By similarity
Cross-linki254 – 254Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) By similarity

Post-translational modificationi

Ubiquitinated by MARCH1 and MARCH8 at Lys-254 leading to sorting into the endosome system and down-regulation of MHC class II Inferred.1 Publication

Keywords - PTMi

Disulfide bond, Glycoprotein, Isopeptide bond, Ubl conjugation

Proteomic databases

PaxDbiQ9TQE0.
PRIDEiQ9TQE0.

PTM databases

PhosphoSiteiQ9TQE0.

Expressioni

Gene expression databases

CleanExiHS_HLA-DRB1.
GenevestigatoriQ9TQE0.

Interactioni

Subunit structurei

Heterodimer of an alpha and a beta subunit; also referred as MHC class II molecule. In the endoplasmic reticulum (ER) it forms a heterononamer; 3 MHC class II molecules bind to a CD74 homotrimer (also known as invariant chain or HLA class II histocompatibility antigen gamma chain). In the endosomal/lysosomal system; CD74 undergoes sequential degradation by various proteases; leaving a small fragment termed CLIP on each MHC class II molecule. MHC class II molecule interacts with HLA_DM, and HLA_DO in B-cells, in order to release CLIP and facilitate the binding of antigenic peptides.

Structurei

3D structure databases

ProteinModelPortaliQ9TQE0.
SMRiQ9TQE0. Positions 30-219.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini126 – 21691Ig-like C1-type
Add
BLAST

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni30 – 12495Beta-1
Add
BLAST
Regioni125 – 227103Beta-2
Add
BLAST

Sequence similaritiesi

Belongs to the MHC class II family.

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG68200.
HOVERGENiHBG012730.
InParanoidiQ9TQE0.

Family and domain databases

Gene3Di2.60.40.10. 1 hit.
3.10.320.10. 1 hit.
InterProiIPR007110. Ig-like_dom.
IPR013783. Ig-like_fold.
IPR003006. Ig/MHC_CS.
IPR003597. Ig_C1-set.
IPR011162. MHC_I/II-like_Ag-recog.
IPR014745. MHC_II_a/b_N.
IPR000353. MHC_II_b_N.
[Graphical view]
PfamiPF07654. C1-set. 1 hit.
PF00969. MHC_II_beta. 1 hit.
[Graphical view]
ProDomiPD000328. MHC_II_b_N. 1 hit.
[Graphical view] [Entries sharing at least one domain]
SMARTiSM00407. IGc1. 1 hit.
SM00921. MHC_II_beta. 1 hit.
[Graphical view]
SUPFAMiSSF54452. SSF54452. 1 hit.
PROSITEiPS50835. IG_LIKE. 1 hit.
PS00290. IG_MHC. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

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

Q9TQE0-1 [UniParc]FASTAAdd to Basket

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MVCLKLPGGS CMAALTVTLM VLSSPLALAG DTQPRFLKQD KFECHFFNGT    50
ERVRYLHRGI YNQEENVRFD SDVGEYRAVT ELGRPVAESW NSQKDFLERR 100
RAEVDTVCRH NYGVGESFTV QRRVHPEVTV YPAKTQPLQH HNLLVCSVSG 150
FYPGSIEVRW FRNGQEEKAG VVSTGLIQNG DWTFQTLVML ETVPRSGEVY 200
TCQVEHPSVM SPLTVEWRAR SESAQSKMLS GVGGFVLGLL FLGAGLFIYF 250
RNQKGHSGLQ PTGFLS 266
Length:266
Mass (Da):29,826
Last modified:May 1, 2000 - v1
Checksum:iAD46B4AD27BAD8F2
GO

Polymorphismi

The following alleles of DRB1-9 are known: DRB1*09:01, DRB1*09:02, DRB1*09:03, DRB1*09:04, DRB1*09:05, DRB1*09:06, DRB1*09:07 and DRB1*09:08. The sequence shown is that of DRB1*09:01.

Natural variant

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Natural varianti5 – 51K → R.
Corresponds to variant rs9270305 [ dbSNP | Ensembl ].
VAR_056537
Natural varianti236 – 2361V → M.
Corresponds to variant rs2230816 [ dbSNP | Ensembl ].
VAR_056538
Natural varianti262 – 2621T → R.
Corresponds to variant rs9269744 [ dbSNP | Ensembl ].
VAR_056539

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
U66826 mRNA. Translation: AAD43829.1.
M17387 mRNA. Translation: AAA36297.1.
PIRiA25925.
C28515.
UniGeneiHs.485130.
Hs.534322.
Hs.696211.
Hs.736560.

Genome annotation databases

EnsembliENST00000437784; ENSP00000405960; ENSG00000229074.
ENST00000444645; ENSP00000409322; ENSG00000236884.

Polymorphism databases

DMDMi34395508.

Keywords - Coding sequence diversityi

Polymorphism

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
U66826 mRNA. Translation: AAD43829.1 .
M17387 mRNA. Translation: AAA36297.1 .
PIRi A25925.
C28515.
UniGenei Hs.485130.
Hs.534322.
Hs.696211.
Hs.736560.

3D structure databases

ProteinModelPortali Q9TQE0.
SMRi Q9TQE0. Positions 30-219.
ModBasei Search...
MobiDBi Search...

PTM databases

PhosphoSitei Q9TQE0.

Polymorphism databases

DMDMi 34395508.

Proteomic databases

PaxDbi Q9TQE0.
PRIDEi Q9TQE0.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

Ensembli ENST00000437784 ; ENSP00000405960 ; ENSG00000229074 .
ENST00000444645 ; ENSP00000409322 ; ENSG00000236884 .

Organism-specific databases

GeneCardsi GC06M032546.
GC06Mk32516.
GC06Ml32694.
H-InvDB HIX0166371.
HIX0166636.
HGNCi HGNC:4948. HLA-DRB1.
MIMi 142857. gene.
neXtProti NX_Q9TQE0.
GenAtlasi Search...

Phylogenomic databases

eggNOGi NOG68200.
HOVERGENi HBG012730.
InParanoidi Q9TQE0.

Enzyme and pathway databases

Reactomei REACT_121399. MHC class II antigen presentation.
REACT_12555. Downstream TCR signaling.
REACT_12582. Phosphorylation of CD3 and TCR zeta chains.
REACT_12596. Translocation of ZAP-70 to Immunological synapse.
REACT_12623. Generation of second messenger molecules.
REACT_19324. PD-1 signaling.
REACT_25078. Interferon gamma signaling.

Miscellaneous databases

ChiTaRSi HLA-DRB1. human.
NextBioi 13654002.
PROi Q9TQE0.
SOURCEi Search...

Gene expression databases

CleanExi HS_HLA-DRB1.
Genevestigatori Q9TQE0.

Family and domain databases

Gene3Di 2.60.40.10. 1 hit.
3.10.320.10. 1 hit.
InterProi IPR007110. Ig-like_dom.
IPR013783. Ig-like_fold.
IPR003006. Ig/MHC_CS.
IPR003597. Ig_C1-set.
IPR011162. MHC_I/II-like_Ag-recog.
IPR014745. MHC_II_a/b_N.
IPR000353. MHC_II_b_N.
[Graphical view ]
Pfami PF07654. C1-set. 1 hit.
PF00969. MHC_II_beta. 1 hit.
[Graphical view ]
ProDomi PD000328. MHC_II_b_N. 1 hit.
[Graphical view ] [Entries sharing at least one domain ]
SMARTi SM00407. IGc1. 1 hit.
SM00921. MHC_II_beta. 1 hit.
[Graphical view ]
SUPFAMi SSF54452. SSF54452. 1 hit.
PROSITEi PS50835. IG_LIKE. 1 hit.
PS00290. IG_MHC. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ALLELE DRB1*09:01).
    Tissue: Blood.
  2. "Allelic variation in the DR subregion of the human major histocompatibility complex."
    Bell J.I., Denney D. Jr., Foster L., Belt T.K., Todd J.A., McDevitt H.O.
    Proc. Natl. Acad. Sci. U.S.A. 84:6234-6238(1987) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 30-115 (ALLELE DRB1*09:01).
  3. "Allelic diversity is generated by intraexon sequence exchange at the DRB1 locus of primates."
    Gyllensten U.B., Sundvall M., Erlich H.A.
    Proc. Natl. Acad. Sci. U.S.A. 88:3686-3690(1991) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 30-115.
  4. "Polymorphism of HLA-DR beta chains in DR4, -7, and -9 haplotypes: implications for the mechanisms of allelic variation."
    Gregersen P.K., Moriuchi T., Karr R.W., Obata F., Moriuchi J., Maccari J., Goldberg D., Winchester R.J., Silver J.
    Proc. Natl. Acad. Sci. U.S.A. 83:9149-9153(1986) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 45-266.
  5. "Invariant chain structure and MHC class II function."
    Cresswell P.
    Cell 84:505-507(1996) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  6. "Presentation of antigens by MHC class II molecules: getting the most out of them."
    Villadangos J.A.
    Mol. Immunol. 38:329-346(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  7. "Autophagy in MHC class II presentation: sampling from within."
    Menendez-Benito V., Neefjes J.
    Immunity 26:1-3(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  8. "MHC class II molecules on the move for successful antigen presentation."
    Rocha N., Neefjes J.
    EMBO J. 27:1-5(2008) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  9. "MHC class II stabilization at the surface of human dendritic cells is the result of maturation-dependent MARCH I down-regulation."
    De Gassart A., Camosseto V., Thibodeau J., Ceppi M., Catalan N., Pierre P., Gatti E.
    Proc. Natl. Acad. Sci. U.S.A. 105:3491-3496(2008) [PubMed] [Europe PMC] [Abstract]
    Cited for: UBIQUITINATION BY MARCH1, SUBCELLULAR LOCATION.
  10. "MHC class II transport at a glance."
    Berger A.C., Roche P.A.
    J. Cell Sci. 122:1-4(2009) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  11. "CD74 in antigen presentation, inflammation, and cancers of the gastrointestinal tract."
    Beswick E.J., Reyes V.E.
    World J. Gastroenterol. 15:2855-2861(2009) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.

Entry informationi

Entry namei2B19_HUMAN
AccessioniPrimary (citable) accession number: Q9TQE0
Secondary accession number(s): Q30149
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 29, 2003
Last sequence update: May 1, 2000
Last modified: September 3, 2014
This is version 111 of the entry and version 1 of the sequence. [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

Complete proteome, Reference proteome

Documents

  1. Human chromosome 6
    Human chromosome 6: entries, gene names and cross-references to MIM
  2. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  3. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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