Entry Name B cell receptor signaling pathway - Ursus arctos (brown bear)
Description B cells are an important component of adaptive immunity. They produce and secrete millions of different antibody molecules, each of which recognizes a different (foreign) antigen. The B cell receptor (BCR) is an integral membrane protein complex that is composed of two immunoglobulin (Ig) heavy chains, two Ig light chains and two heterodimers of Ig-alpha and Ig-beta. After BCR ligation by antigen, three main protein tyrosine kinases (PTKs) -the SRC-family kinase LYN, SYK and the TEC-family kinase BTK- are activated. Phosphatidylinositol 3-kinase (PI3K) and phospholipase C-gamma 2 (PLC-gamma 2) are important downstream effectors of BCR signalling. This signalling ultimately results in the expression of immediate early genes that further activate the expression of other genes involved in B cell proliferation, differentiation and Ig production as well as other processes.
Class Organismal Systems; Immune systemBRITE hierarchy
Pathway map uah04662 B cell receptor signaling pathway
Other DBs Organism Ursus arctos (brown bear) [GN:
uah ]
Gene 113241630 SOS1; LOW QUALITY PROTEIN: son of sevenless homolog 1 [KO:K03099 ]
113243504 CD79A; B-cell antigen receptor complex-associated protein alpha chain [KO:K06506 ]
113244670 RAC3; ras-related C3 botulinum toxin substrate 3 isoform X1 [KO:K07861 ]
113244955 VAV3; guanine nucleotide exchange factor VAV3 isoform X1 [KO:K05730 ]
113251772 PIK3AP1; phosphoinositide 3-kinase adapter protein 1 isoform X1 [KO:K12230 ]
113252399 NFATC3; nuclear factor of activated T-cells, cytoplasmic 3 isoform X1 [KO:K17333 ]
113252535 PLCG2; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-2 isoform X1 [KO:K05859 ] [EC:3.1.4.11 ]
113253458 MALT1; mucosa-associated lymphoid tissue lymphoma translocation protein 1 isoform X1 [KO:K07369 ] [EC:3.4.22.-]
113253544 NFATC1; nuclear factor of activated T-cells, cytoplasmic 1 isoform X1 [KO:K04446 ]
113253989 PIK3CB; phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit beta isoform isoform X1 [KO:K00922 ] [EC:2.7.1.153 ]
113254730 PIK3R3; phosphatidylinositol 3-kinase regulatory subunit gamma isoform X2 [KO:K02649 ]
113254799 PIK3CA; phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform [KO:K00922 ] [EC:2.7.1.153 ]
113255266 PIK3R1; phosphatidylinositol 3-kinase regulatory subunit alpha isoform X1 [KO:K02649 ]
113256705 PIK3R2; phosphatidylinositol 3-kinase regulatory subunit beta [KO:K02649 ]
113258729 NFATC2; nuclear factor of activated T-cells, cytoplasmic 2 isoform X1 [KO:K17332 ]
113259177 PPP3CB; serine/threonine-protein phosphatase 2B catalytic subunit beta isoform isoform X3 [KO:K04348 ] [EC:3.1.3.16 ]
113263101 NFKB1; nuclear factor NF-kappa-B p105 subunit isoform X3 [KO:K02580 ]
113263114 DAPP1; dual adapter for phosphotyrosine and 3-phosphotyrosine and 3-phosphoinositide [KO:K12229 ]
113265279 CD79B; B-cell antigen receptor complex-associated protein beta chain isoform X2 [KO:K06507 ]
113266577 VAV2; guanine nucleotide exchange factor VAV2 isoform X1 [KO:K05730 ]
113267943 RAC1; ras-related C3 botulinum toxin substrate 1 isoform X2 [KO:K04392 ]
113267978 CARD11; caspase recruitment domain-containing protein 11 isoform X1 [KO:K07367 ]
113270001 PPP3CC; serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform isoform X2 [KO:K04348 ] [EC:3.1.3.16 ]
113270537 PIK3CD; phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform isoform X1 [KO:K00922 ] [EC:2.7.1.153 ]
Compound C01245 D-myo-Inositol 1,4,5-trisphosphate
C05981 Phosphatidylinositol-3,4,5-trisphosphate
Reference Authors Niiro H, Clark EA.
Title Regulation of B-cell fate by antigen-receptor signals.
Journal Reference Authors Kurosaki T.
Title Genetic analysis of B cell antigen receptor signaling.
Journal Reference Authors Nitschke L.
Title The role of CD22 and other inhibitory co-receptors in B-cell activation.
Journal Reference Authors Morgan BP, Marchbank KJ, Longhi MP, Harris CL, Gallimore AM.
Title Complement: central to innate immunity and bridging to adaptive responses.
Journal Reference Authors Kurosaki T.
Title Regulation of B-cell signal transduction by adaptor proteins.
Journal Reference Authors Nitschke L, Tsubata T.
Title Molecular interactions regulate BCR signal inhibition by CD22 and CD72.
Journal Reference Authors Jumaa H, Hendriks RW, Reth M.
Title B cell signaling and tumorigenesis.
Journal Reference Authors Rickert RC.
Title Regulation of B lymphocyte activation by complement C3 and the B cell coreceptor complex.
Journal Reference Authors Zouali M, Sarmay G
Title B lymphocyte signaling pathways in systemic autoimmunity: implications for pathogenesis and treatment.
Journal Reference Authors Chiles TC.
Title Regulation and function of cyclin D2 in B lymphocyte subsets.
Journal Reference Authors Allam A, Marshall AJ
Title Role of the adaptor proteins Bam32, TAPP1 and TAPP2 in lymphocyte activation.
Journal Reference Authors Gold MR
Title To make antibodies or not: signaling by the B-cell antigen receptor.
Journal Reference Authors Fu C, Turck CW, Kurosaki T, Chan AC
Title BLNK: a central linker protein in B cell activation.
Journal Reference Authors Okada T, Maeda A, Iwamatsu A, Gotoh K, Kurosaki T
Title BCAP: the tyrosine kinase substrate that connects B cell receptor to phosphoinositide 3-kinase activation.
Journal Reference Authors Shinohara H, Maeda S, Watarai H, Kurosaki T
Title IkappaB kinase beta-induced phosphorylation of CARMA1 contributes to CARMA1 Bcl10 MALT1 complex formation in B cells.
Journal Related uah04610 Complement and coagulation cascades
uah04810 Regulation of actin cytoskeleton
KO pathway
