HLA-DRB4

From Wikipedia, the free encyclopedia

Major histocompatibility complex, class II, DR beta 4

Identifiers

HLA-DRB4; HLA DRB1; DRB4; HLA-DR4B

Gene ontology
Molecular Function:	• MHC class II receptor activity
Cellular Component:	• integral to plasma membrane • membrane • integral to membrane • MHC class II protein complex
Biological Process:	• antigen processing and presentation of peptide or polysaccharide antigen via MHC class II • immune response • signal transduction • pathogenesis

Orthologs

Human

Mouse

Entrez

3126

n/a

Refseq

XM_940103 (mRNA)
XP_945196 (protein)

n/a (mRNA)
n/a (protein)

Pubmed search

[1]

n/a

Major histocompatibility complex, class II, DR beta 4, also known as HLA-DRB4, is a human gene.

HLA-DRB4 belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (DRA) and a beta (DRB) chain, both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa and its gene contains 6 exons. Exon one encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, exon 4 encodes the transmembrane domain and exon 5 encodes the cytoplasmic tail. Within the DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. DRB1 is expressed at a level five times higher than its paralogues DRB3, DRB4 and DRB5. The presence of DRB4 is linked with allelic variants of DRB1, otherwise it is omitted. There are 4 related pseudogenes: DRB2, DRB6, DRB7, DRB8 and DRB9.^[1]

[edit] References

^ Entrez Gene: HLA-DRB4 major histocompatibility complex, class II, DR beta 4.

[edit] Further reading

Germain RN (1996). "Binding domain regulation of MHC class II molecule assembly, trafficking, fate, and function.". Semin. Immunol. 7 (6): 361–72. doi:10.1006/smim.1995.0041. PMID 8775462.
O'Brien RM, Cram DS, Russ GR, et al. (1992). "Nucleotide sequences of the HLA-DRw12 and DRw8 B1 chains from an Australian aborigine.". Hum. Immunol. 34 (2): 147–51. PMID 1358866.
Kenter M, Otting N, Anholts J, et al. (1992). "Mhc-DRB diversity of the chimpanzee (Pan troglodytes).". Immunogenetics 37 (1): 1–11. PMID 1428007.
Dong RP, Kimura A, Sasazuki T (1992). "Sequence analysis of three novel DRw14-DRB1 alleles.". Immunogenetics 36 (2): 130–3. PMID 1612646.
Piatier-Tonneau D, Gastinel LN, Amblard F, et al. (1991). "Interaction of CD4 with HLA class II antigens and HIV gp120.". Immunogenetics 34 (2): 121–8. PMID 1869305.
Nong Y, Kandil O, Tobin EH, et al. (1991). "The HIV core protein p24 inhibits interferon-gamma-induced increase of HLA-DR and cytochrome b heavy chain mRNA levels in the human monocyte-like cell line THP1.". Cell. Immunol. 132 (1): 10–6. PMID 1905983.
Rosenstein Y, Burakoff SJ, Herrmann SH (1990). "HIV-gp120 can block CD4-class II MHC-mediated adhesion.". J. Immunol. 144 (2): 526–31. PMID 1967269.
Callahan KM, Fort MM, Obah EA, et al. (1990). "Genetic variability in HIV-1 gp120 affects interactions with HLA molecules and T cell receptor.". J. Immunol. 144 (9): 3341–6. PMID 1970352.
Bowman MR, MacFerrin KD, Schreiber SL, Burakoff SJ (1991). "Identification and structural analysis of residues in the V1 region of CD4 involved in interaction with human immunodeficiency virus envelope glycoprotein gp120 and class II major histocompatibility complex molecules.". Proc. Natl. Acad. Sci. U.S.A. 87 (22): 9052–6. PMID 1978941.
Gyllensten UB, Sundvall M, Erlich HA (1991). "Allelic diversity is generated by intraexon sequence exchange at the DRB1 locus of primates.". Proc. Natl. Acad. Sci. U.S.A. 88 (9): 3686–90. PMID 2023919.
Lee KW, Johnson AH, Hurley CK (1990). "Two divergent routes of evolution gave rise to the DRw13 haplotypes.". J. Immunol. 145 (9): 3119–25. PMID 2212675.
Gorski J (1989). "First domain sequence of the HLA-DRB1 chain from two HLA-DRw14 homozygous typing cell lines: TEM (Dw9) and AMALA (Dw16).". Hum. Immunol. 24 (2): 145–9. PMID 2466818.
Fan WM, Kasahara M, Gutknecht J, et al. (1990). "Shared class II MHC polymorphisms between humans and chimpanzees.". Hum. Immunol. 26 (2): 107–21. PMID 2511168.
Clayton LK, Sieh M, Pious DA, Reinherz EL (1989). "Identification of human CD4 residues affecting class II MHC versus HIV-1 gp120 binding.". Nature 339 (6225): 548–51. doi:10.1038/339548a0. PMID 2543930.
Abe A, Ito I, Ohkubo M, et al. (1990). "Two distinct subtypes of the HLA-DRw12 haplotypes in the Japanese population detected by nucleotide sequence analysis and oligonucleotide genotyping.". Immunogenetics 30 (6): 422–6. PMID 2592019.
Diamond DC, Sleckman BP, Gregory T, et al. (1988). "Inhibition of CD4+ T cell function by the HIV envelope protein, gp120.". J. Immunol. 141 (11): 3715–7. PMID 2846691.
Owerbach D, Rich C, Taneja K (1986). "Characterization of three HLA-DR beta genes isolated from an HLA-DR 3/4 insulin-dependent diabetic patient.". Immunogenetics 24 (1): 41–6. PMID 3015788.
Karr RW, Gregersen PK, Obata F, et al. (1986). "Analysis of DR beta and DQ beta chain cDNA clones from a DR7 haplotype.". J. Immunol. 137 (9): 2886–90. PMID 3020127.
Andersson G, Larhammar D, Widmark E, et al. (1987). "Class II genes of the human major histocompatibility complex. Organization and evolutionary relationship of the DR beta genes.". J. Biol. Chem. 262 (18): 8748–58. PMID 3036826.
Wu S, Saunders TL, Bach FH (1987). "Polymorphism of human Ia antigens generated by reciprocal intergenic exchange between two DR beta loci.". Nature 324 (6098): 676–9. doi:10.1038/324676a0. PMID 3099214.