title: Bruton tyrosine kinase (BTK) in X-linked agammaglobulinemia (XLA).
abstract: X-linked agammaglobulinemia (XLA) is a heritable immunodeficiency disorder that is caused by a differentiation block leading to almost complete absence of B lymphocytes and plasma cells. The affected protein is a cytoplasmic protein tyrosine kinase, Bruton's agammaglobulinemia tyrosine kinase (Btk). Btk along with Tec, Itk, Bmx and Txk belong to a distinct family of protein kinases. These proteins contain five regions; PH, TH, SH3, SH2 and kinase domains. Mutations causing XLA may affect any of these domains. About 380 unique mutations have been identified and are collected in a mutation database, BTKbase. Here, we describe the structure, function, and interactions of the affected signaling molecules in atomic detail.
authors: Institute of Medical Technology, FIN-33014 University of Tampere, Finland.
authors: M
authors: M
authors: Vihinen
authors: P T
authors: PT
authors: Mattsson
authors: C I
authors: CI
authors: Smith
mesh_terms: D000077329:Agammaglobulinaemia Tyrosine Kinase; D000361:Agammaglobulinemia / Q000201:enzymology* / Q000235:genetics / Q000382:microbiology; D006193:Haemophilus influenzae; D006801:Humans; D009154:Mutation; D017434:Protein Structure, Tertiary; D011505:Protein-Tyrosine Kinases / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D015398:Signal Transduction; D013296:Streptococcus pneumoniae; D014960:X Chromosome
chemical_list: D011505:Protein-Tyrosine Kinases; D000077329:Agammaglobulinaemia Tyrosine Kinase; C000625949:BTK protein, human