Atlas One · Host Biology · Scale 03 — Molecular

BTK

BTK (Bruton's tyrosine kinase) is the critical BCR signaling kinase activating PLCγ2-Ca²⁺ and NF-κB → B-cell survival; germline BTK loss causes X-linked agammaglobulinemia; ibrutinib (covalent BTK inhibitor) and zanubrutinib are approved for CLL, MCL, WM, and MZL.

Also known as: BTK, Bruton's tyrosine kinase, BTK inhibitor, ibrutinib, zanubrutinib, acalabrutinib, pirtobrutinib, X-linked agammaglobulinemia, XLA, BCR signaling kinase

Scale 03 — MolecularScale
draftStatus
2026-06-06Last Reviewed
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btk

BTK

BTK (Bruton's tyrosine kinase) is the critical BCR signaling kinase activating PLCγ2-Ca²⁺ and NF-κB → B-cell survival; germline BTK loss causes X-linked agammaglobulinemia; ibrutinib (covalent BTK inhibitor) and zanubrutinib are approved for CLL, MCL, WM, and MZL.