Entry
Name
B cell receptor signaling pathway - Enhydra lutris kenyoni (northern sea otter)
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 system
BRITE hierarchy
Pathway map
elk04662 B cell receptor signaling pathway
Ortholog table
Other DBs
Organism
Enhydra lutris kenyoni (northern sea otter) [GN:
elk ]
Gene
111139538 B-cell antigen receptor complex-associated protein alpha chain [KO:K06506 ]
111158187 B-cell antigen receptor complex-associated protein beta chain isoform X1 [KO:K06507 ]
111154926 dual adapter for phosphotyrosine and 3-phosphotyrosine and 3-phosphoinositide [KO:K12229 ]
111145636 ras-related C3 botulinum toxin substrate 1 isoform X1 [KO:K04392 ]
111160304 ras-related C3 botulinum toxin substrate 3 isoform X1 [KO:K07861 ]
111154080 B-cell scaffold protein with ankyrin repeats isoform X1 [KO:K26239 ]
111144797 serine/threonine-protein phosphatase 2B catalytic subunit beta isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
111154144 serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
111154566 serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
111154209 nuclear factor of activated T-cells, cytoplasmic 1 isoform X1 [KO:K04446 ]
111141582 LOW QUALITY PROTEIN: nuclear factor of activated T-cells, cytoplasmic 2 [KO:K17332 ]
111152752 nuclear factor of activated T-cells, cytoplasmic 3 isoform X1 [KO:K17333 ]
111145457 caspase recruitment domain-containing protein 11 isoform X1 [KO:K07367 ]
111154234 mucosa-associated lymphoid tissue lymphoma translocation protein 1 [KO:K07369 ] [EC:3.4.22.-]
111143470 phosphatidylinositol 3-kinase regulatory subunit gamma isoform X1 [KO:K02649 ]
111155224 phosphatidylinositol 3-kinase regulatory subunit alpha isoform X1 [KO:K02649 ]
111143790 phosphatidylinositol 3-kinase regulatory subunit beta [KO:K02649 ]
111155003 LOW QUALITY PROTEIN: phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit beta isoform [KO:K00922 ] [EC:2.7.1.153 ]
111154641 phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform isoform X1 [KO:K00922 ] [EC:2.7.1.153 ]
111139555 leukocyte immunoglobulin-like receptor subfamily B member 3 isoform X1 [KO:K06512 ]
111140050 leukocyte immunoglobulin-like receptor subfamily B member 3 [KO:K06512 ]
111140043 LOW QUALITY PROTEIN: leukocyte immunoglobulin-like receptor subfamily A member 1 [KO:K06512 ]
111140495 leukocyte immunoglobulin-like receptor subfamily B member 3 [KO:K06512 ]
111139554 leukocyte immunoglobulin-like receptor subfamily A member 6 isoform X1 [KO:K06512 ]
111144693 phosphoinositide 3-kinase adapter protein 1 isoform X1 [KO:K12230 ]
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 pathway
elk04610 Complement and coagulation cascades
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KO pathway
LinkDB
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