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Details on Person UniProt:P40259 CD79B

Class:IdReferenceGeneProduct:51120
_chainChangeLogsignal peptide:1-28 added on Fri February 6 2015;chain:29-229 added on Fri February 6 2015
_displayNameUniProt:P40259 CD79B
_timestamp2024-11-03 19:44:58
chainsignal peptide:1-28
chain:29-229
checksumC467175567D10883
commentFUNCTION Required in cooperation with CD79A for initiation of the signal transduction cascade activated by the B-cell antigen receptor complex (BCR) which leads to internalization of the complex, trafficking to late endosomes and antigen presentation. Enhances phosphorylation of CD79A, possibly by recruiting kinases which phosphorylate CD79A or by recruiting proteins which bind to CD79A and protect it from dephosphorylation.SUBUNIT Heterodimer of alpha and beta chains; disulfide-linked. Part of the B-cell antigen receptor complex where the alpha/beta chain heterodimer is non-covalently associated with an antigen-specific membrane-bound surface immunoglobulin of two heavy chains and two light chains (PubMed:35981043). Interacts with LYN (By similarity).INTERACTION Following antigen binding, the BCR has been shown to translocate from detergent-soluble regions of the cell membrane to lipid rafts although signal transduction through the complex can also occur outside lipid rafts.ALTERNATIVE PRODUCTS B-cells.DOMAIN The transmembrane helices of CD79A and CD79B chains and two IgM heavy chains assembly in a four-helix bundle structure that appears to be conserved among different BCR isotypes.PTM Phosphorylated on tyrosine upon B-cell activation by SRC-type Tyr-kinases such as BLK, LYN and SYK.DISEASE The disease is caused by variants affecting the gene represented in this entry.ONLINE INFORMATION CD79B mutation db
descriptionrecommendedName: B-cell antigen receptor complex-associated protein beta chain alternativeName: B-cell-specific glycoprotein B29 alternativeName: Ig-beta alternativeName: Immunoglobulin-associated B29 protein cdAntigenNameCD79b/cdAntigenName
geneNameCD79B
B29
IGB
identifierP40259
isSequenceChangedFALSE
keyword3D-structure
Adaptive immunity
Alternative splicing
Cell membrane
Direct protein sequencing
Disease variant
Disulfide bond
Glycoprotein
Immunity
Immunoglobulin domain
Membrane
Phosphoprotein
Proteomics identification
Receptor
Reference proteome
Signal
Transmembrane
Transmembrane helix
modified[InstanceEdit:9836292] Weiser, Joel, 2023-05-25
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9862192] Weiser, Joel, 2024-02-26
[InstanceEdit:9926675] Weiser, Joel, 2024-11-03
nameCD79B
referenceDatabase[ReferenceDatabase:2] UniProt
referenceGene[ReferenceDNASequence:8998209] ENSEMBL:ENSG00000007312 CD79B [Homo sapiens]
secondaryIdentifierCD79B_HUMAN
Q53FS2
Q9BU06
sequenceLength229
species[Species:48887] Homo sapiens
(isoformParent)[ReferenceIsoform:144843] UniProt:P40259-2 CD79B [Homo sapiens]
[ReferenceIsoform:403944] UniProt:P40259-1 CD79B [Homo sapiens]
[ReferenceIsoform:8967792] UniProt:P40259-3 CD79B [Homo sapiens]
(referenceEntity)[EntityWithAccessionedSequence:197156] CD79B [plasma membrane] [Homo sapiens]
[EntityWithAccessionedSequence:983634] p-Y196,Y207-CD79B [plasma membrane] [Homo sapiens]
[EntityWithAccessionedSequence:9940589] CD79B (GC B cell) [plasma membrane] [Homo sapiens]
(referenceSequence)[ModifiedResidue:983533] O4'-phospho-L-tyrosine (unknown) at 207
[ModifiedResidue:983598] O4'-phospho-L-tyrosine at 199
[ModifiedResidue:983665] O4'-phospho-L-tyrosine at 196
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