CD8A

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	Wikidata
View/Edit Human

CD8a (Cluster of Differentiation 8a), is a human gene.^[1]

Function

The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigen displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 alpha chain isoforms. Two alternative transcripts encoding distinct isoforms, one membrane associated and one secreted, have been identified.^[1]

Interactions

CD8A has been shown to interact with:

References

↑ ^1.0 ^1.1 "Entrez Gene: CD8A CD8a molecule".
↑ Doucey MA, Goffin L, Naeher D, Michielin O, Baumgärtner P, Guillaume P, Palmer E, Luescher IF (January 2003). "CD3 delta establishes a functional link between the T cell receptor and CD8". J. Biol. Chem. 278 (5): 3257–64. doi:10.1074/jbc.M208119200. PMID 12215456.
↑ ^3.0 ^3.1 Gao GF, Willcox BE, Wyer JR, Boulter JM, O'Callaghan CA, Maenaka K, Stuart DI, Jones EY, Van Der Merwe PA, Bell JI, Jakobsen BK (May 2000). "Classical and nonclassical class I major histocompatibility complex molecules exhibit subtle conformational differences that affect binding to CD8alphaalpha". J. Biol. Chem. 275 (20): 15232–8. doi:10.1074/jbc.275.20.15232. PMID 10809759.
↑ Gao GF, Tormo J, Gerth UC, Wyer JR, McMichael AJ, Stuart DI, Bell JI, Jones EY, Jakobsen BK (June 1997). "Crystal structure of the complex between human CD8alpha(alpha) and HLA-A2". Nature. 387 (6633): 630–4. doi:10.1038/42523. PMID 9177355.
↑ Sanders SK, Giblin PA, Kavathas P (September 1991). "Cell-cell adhesion mediated by CD8 and human histocompatibility leukocyte antigen G, a nonclassical major histocompatibility complex class 1 molecule on cytotrophoblasts". J. Exp. Med. 174 (3): 737–40. doi:10.1084/jem.174.3.737. PMC 2118947. PMID 1908512.

Parnes JR (1989). "Molecular biology and function of CD4 and CD8". Adv. Immunol. 44: 265–311. doi:10.1016/S0065-2776(08)60644-6. PMID 2493728.
Li L, Li HS, Pauza CD, Bukrinsky M, Zhao RY (2006). "Roles of HIV-1 auxiliary proteins in viral pathogenesis and host-pathogen interactions". Cell Res. 15 (11–12): 923–34. doi:10.1038/sj.cr.7290370. PMID 16354571.
Stove V, Verhasselt B (2006). "Modelling thymic HIV-1 Nef effects". Curr. HIV Res. 4 (1): 57–64. doi:10.2174/157016206775197583. PMID 16454711.
Nakayama K, Kawachi Y, Tokito S, Minami N, Yamamoto R, Imai T, Gachelin G, Nakauchi H (1992). "Recent duplication of the two human CD8 beta-chain genes". J. Immunol. 148 (6): 1919–27. PMID 1541829.
Leahy DJ, Axel R, Hendrickson WA (1992). "Crystal structure of a soluble form of the human T cell coreceptor CD8 at 2.6 A resolution". Cell. 68 (6): 1145–62. doi:10.1016/0092-8674(92)90085-Q. PMID 1547508.
Erickson JD, Trojanowski JQ, Eiden LE (1991). "Regional distribution and partial molecular characterization of CD4-related mRNA in human brain and peripheral tissues". Brain Res. Mol. Brain Res. 10 (1): 23–31. doi:10.1016/0169-328X(91)90052-Y. PMID 1676132.
Moebius U, Kober G, Griscelli AL, Hercend T, Meuer SC (1991). "Expression of different CD8 isoforms on distinct human lymphocyte subpopulations". Eur. J. Immunol. 21 (8): 1793–800. doi:10.1002/eji.1830210803. PMID 1831127.
Mittler RS, Rankin BM, Kiener PA (1991). "Physical associations between CD45 and CD4 or CD8 occur as late activation events in antigen receptor-stimulated human T cells". J. Immunol. 147 (10): 3434–40. PMID 1834739.
Sanders SK, Giblin PA, Kavathas P (1991). "Cell-cell adhesion mediated by CD8 and human histocompatibility leukocyte antigen G, a nonclassical major histocompatibility complex class 1 molecule on cytotrophoblasts". J. Exp. Med. 174 (3): 737–40. doi:10.1084/jem.174.3.737. PMC 2118947. PMID 1908512.
Barber EK, Dasgupta JD, Schlossman SF, Trevillyan JM, Rudd CE (1989). "The CD4 and CD8 antigens are coupled to a protein-tyrosine kinase (p56lck) that phosphorylates the CD3 complex". Proc. Natl. Acad. Sci. U.S.A. 86 (9): 3277–81. doi:10.1073/pnas.86.9.3277. PMC 287114. PMID 2470098.
Norment AM, Lonberg N, Lacy E, Littman DR (1989). "Alternatively spliced mRNA encodes a secreted form of human CD8 alpha. Characterization of the human CD8 alpha gene". J. Immunol. 142 (9): 3312–9. PMID 2496167.
Nakayama K, Tokito S, Okumura K, Nakauchi H (1989). "Structure and expression of the gene encoding CD8 alpha chain (Leu-2/T8)". Immunogenetics. 30 (5): 393–7. doi:10.1007/BF02425282. PMID 2509342.
Giblin P, Ledbetter JA, Kavathas P (1989). "A secreted form of the human lymphocyte cell surface molecule CD8 arises from alternative splicing". Proc. Natl. Acad. Sci. U.S.A. 86 (3): 998–1002. doi:10.1073/pnas.86.3.998. PMC 286608. PMID 2536941.
Aruffo A, Seed B (1989). "Expression of cDNA clones encoding the thymocyte antigens CD1a, b, c demonstrates a hierarchy of exclusion in fibroblasts". J. Immunol. 143 (5): 1723–30. PMID 2701945.
Bowcock AM, Kavathas P, Margolskee RF, Herzenberg L, Cavalli-Sforza LL (1986). "An RFLP associated with pcDLeu2-14, a human T-cell differentiation antigen CD8 (Leu2) cDNA mapped to 2p12". Nucleic Acids Res. 14 (19): 7817. doi:10.1093/nar/14.19.7817. PMC 311807. PMID 2877435.
Norment AM, Littman DR (1989). "A second subunit of CD8 is expressed in human T cells". EMBO J. 7 (11): 3433–9. PMC 454842. PMID 3145195.
Littman DR, Thomas Y, Maddon PJ, Chess L, Axel R (1985). "The isolation and sequence of the gene encoding T8: a molecule defining functional classes of T lymphocytes". Cell. 40 (2): 237–46. doi:10.1016/0092-8674(85)90138-2. PMID 3871356.
Sukhatme VP, Sizer KC, Vollmer AC, Hunkapiller T, Parnes JR (1985). "The T cell differentiation antigen Leu-2/T8 is homologous to immunoglobulin and T cell receptor variable regions". Cell. 40 (3): 591–7. doi:10.1016/0092-8674(85)90207-7. PMID 3918796.
Parnes JR, Sizer KC, Sukhatme VP, Hunkapiller T (1986). "Structure of Leu-2/T8 as deduced from the sequence of a cDNA clone". Behring Inst. Mitt. (77): 48–55. PMID 3936473.

External links

CD8a+protein,+human at the US National Library of Medicine Medical Subject Headings (MeSH)
Human CD8A genome location and CD8A gene details page in the UCSC Genome Browser.
Human MAL genome location and MAL gene details page in the UCSC Genome Browser.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

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[entrez-1] 1.0 ^1.1 "Entrez Gene: CD8A CD8a molecule".

[pmid12215456-2] Doucey MA, Goffin L, Naeher D, Michielin O, Baumgärtner P, Guillaume P, Palmer E, Luescher IF (January 2003). "CD3 delta establishes a functional link between the T cell receptor and CD8". J. Biol. Chem. 278 (5): 3257–64. doi:10.1074/jbc.M208119200. PMID 12215456.

[pmid10809759-3] 3.0 ^3.1 Gao GF, Willcox BE, Wyer JR, Boulter JM, O'Callaghan CA, Maenaka K, Stuart DI, Jones EY, Van Der Merwe PA, Bell JI, Jakobsen BK (May 2000). "Classical and nonclassical class I major histocompatibility complex molecules exhibit subtle conformational differences that affect binding to CD8alphaalpha". J. Biol. Chem. 275 (20): 15232–8. doi:10.1074/jbc.275.20.15232. PMID 10809759.

[pmid9177355-4] Gao GF, Tormo J, Gerth UC, Wyer JR, McMichael AJ, Stuart DI, Bell JI, Jones EY, Jakobsen BK (June 1997). "Crystal structure of the complex between human CD8alpha(alpha) and HLA-A2". Nature. 387 (6633): 630–4. doi:10.1038/42523. PMID 9177355.

[pmid1908512-5] Sanders SK, Giblin PA, Kavathas P (September 1991). "Cell-cell adhesion mediated by CD8 and human histocompatibility leukocyte antigen G, a nonclassical major histocompatibility complex class 1 molecule on cytotrophoblasts". J. Exp. Med. 174 (3): 737–40. doi:10.1084/jem.174.3.737. PMC 2118947. PMID 1908512.

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v t e Proteins: clusters of differentiation (see also list of human clusters of differentiation)
1-50	CD1 a-c 1A 1D 1E CD2 CD3 γ δ ε CD4 CD5 CD6 CD7 CD8 a CD9 CD10 CD11 a b c d CD13 CD14 CD15 CD16 A B CD18 CD19 CD20 CD21 CD22 CD23 CD24 CD25 CD26 CD27 CD28 CD29 CD30 CD31 CD32 A B CD33 CD34 CD35 CD36 CD37 CD38 CD39 CD40 CD41 CD42 a b c d CD43 CD44 CD45 CD46 CD47 CD48 CD49 a b c d e f CD50
51-100	CD51 CD52 CD53 CD54 CD55 CD56 CD57 CD58 CD59 CD61 CD62 E L P CD63 CD64 A B C CD66 a b c d e f CD68 CD69 CD70 CD71 CD72 CD73 CD74 CD78 CD79 a b CD80 CD81 CD82 CD83 CD84 CD85 a d e h j k CD86 CD87 CD88 CD89 CD90 CD91 - CD92 CD93 CD94 CD95 CD96 CD97 CD98 CD99 CD100
101-150	CD101 CD102 CD103 CD104 CD105 CD106 CD107 a b CD108 CD109 CD110 CD111 CD112 CD113 CD114 CD115 CD116 CD117 CD118 CD119 CD120 a b CD121 a b CD122 CD123 CD124 CD125 CD126 CD127 CD129 CD130 CD131 CD132 CD133 CD134 CD135 CD136 CD137 CD138 CD140b CD141 CD142 CD143 CD144 CD146 CD147 CD148 CD150
151-200	CD151 CD152 CD153 CD154 CD155 CD156 a b c CD157 CD158 (a d e i k) CD159 a c CD160 CD161 CD162 CD163 CD164 CD166 CD167 a b CD168 CD169 CD170 CD171 CD172 a b g CD174 CD177 CD178 CD179 a b CD180 CD181 CD182 CD183 CD184 CD185 CD186 CD191 CD192 CD193 CD194 CD195 CD196 CD197 CDw198 CDw199 CD200
201-250	CD201 CD202b CD204 CD205 CD206 CD207 CD208 CD209 CDw210 a b CD212 CD213a 1 2 CD217 CD218 (a b) CD220 CD221 CD222 CD223 CD224 CD225 CD226 CD227 CD228 CD229 CD230 CD233 CD234 CD235 a b CD236 CD238 CD239 CD240CE CD240D CD241 CD243 CD244 CD246 CD247 - CD248 CD249
251-300	CD252 CD253 CD254 CD256 CD257 CD258 CD261 CD262 CD263 CD264 CD265 CD266 CD267 CD268 CD269 CD271 CD272 CD273 CD274 CD275 CD276 CD278 CD279 CD280 CD281 CD282 CD283 CD284 CD286 CD288 CD289 CD290 CD292 CDw293 CD294 CD295 CD297 CD298 CD299
301-350	CD300A CD301 CD302 CD303 CD304 CD305 CD306 CD307 CD309 CD312 CD314 CD315 CD316 CD317 CD318 CD320 CD321 CD322 CD324 CD325 CD326 CD328 CD329 CD331 CD332 CD333 CD334 CD335 CD336 CD337 CD338 CD339 CD340 CD344 CD349 CD350

CD8A

Contents

Function

Interactions

See also

References

Further reading

External links

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