Summary

Name CD19
Full Name B-lymphocyte antigen CD19
Synonyms B-lymphocyte surface antigen B4, Differentiation antigen CD19, T-cell surface antigen Leu-12
Primary ID P15391
Links - -
Type protein
Relations 16
Pathways B-cell activation, EBV infection
Function Functions as coreceptor for the B-cell antigen receptor complex (BCR) on B-lymphocytes. Decreases the threshold for activation of downstream signaling pathways and for triggering B-cell responses to antigens (PubMed:2463100, PubMed:1373518, PubMed:16672701). Activates signaling pathways that lead to the activation of phosphatidylinositol 3-kinase and the mobilization of intracellular Ca(2+) stores (PubMed:9382888, PubMed:9317126, PubMed:12387743, PubMed:16672701). Is not required for early steps during B cell differentiation in the blood marrow (PubMed:9317126). Required for normal differentiation of B-1 cells (By similarity). Required for normal B cell differentiation and proliferation in response to antigen challenges (PubMed:2463100, PubMed:1373518). Required for normal levels of serum immunoglobulins, and for production of high-affinity antibodies in response to antigen challenge (PubMed:9317126, PubMed:12387743, PubMed:16672701).

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Modifications Tables

Relations

Regulator Mechanism target score
+ up-regulates img/direct-activation.png phosphorylation CD19 0.765
Publications: 2 Organism: Homo Sapiens
Pathways:B-cell activation, EBV infection
+ up-regulates activity img/direct-activation.png phosphorylation CD19 0.765
Publications: 3 Organism: Mus Musculus
Pathways:B-cell activation, EBV infection
+ up-regulates activity img/direct-activation.png phosphorylation CD19 0.554
Publications: 1 Organism: Mus Musculus
+ up-regulates activity img/direct-activation.png binding CD19 0.777
Publications: 1 Organism: Homo Sapiens
Pathways:EBV infection
+ up-regulates activity img/indirect-activation.png MAPK1 0.4
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding PI3K 0.497
Publications: 2 Organism: Mus Musculus
Pathways:B-cell activation, EBV infection
+ up-regulates activity img/direct-activation.png binding VAV1 0.713
Publications: 1 Organism: Mus Musculus
+ up-regulates img/indirect-activation.png B_cell_maturation 0.7
Publications: 1 Organism: Mus Musculus
Pathways:EBV infection
+ up-regulates activity img/direct-activation.png binding PIK3R1 0.562
Publications: 2 Organism: Mus Musculus
+ down-regulates activity img/direct_inhibition.png binding CD19 0.4
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding LYN 0.765
Publications: 1 Organism: Mus Musculus
Pathways:B-cell activation, EBV infection