title: Pleckstrin homology domains of tec family protein kinases.
abstract: Pleckstrin homology (PH) domains have been shown to be involved in different interactions, including binding to inositol compounds, protein kinase C isoforms, and heterotrimeric G proteins. In some cases, the most important function of PH domains is transient localisation of proteins to membranes, where they can interact with their partners. Tec family protein tyrosine kinases contain a PH domain. In Btk, also PH domain mutations lead into an immunodeficiency, X-linked agammaglobulinemia (XLA). A new disease-causing mutation was identified in the PH domain. The structures for the PH domains of Bmx, Itk, and Tec were modelled based on Btk structure. The domains seem to have similar scaffolding and electrostatic polarisation but to have some differences in the binding regions. The models provide new insight into the specificity, function, and regulation of Tec family kinases.
authors.affiliation: Institue of Medical Technology, University of Tampere, P.O. Box 607, Tampere, FIN-33101, Finland.
authors.forename: M P
authors.initials: MP
authors.lastname: Okoh
authors.forename: M
authors.initials: M
authors.lastname: Vihinen
mesh_terms: D000077329:Agammaglobulinaemia Tyrosine Kinase; D000361:Agammaglobulinemia / Q000097:blood / Q000235:genetics*; D000595:Amino Acid Sequence; D001665:Binding Sites; D016384:Consensus Sequence; D004251:DNA Transposable Elements; D005091:Exons; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D020125:Mutation, Missense; D017433:Protein Structure, Secondary; D011505:Protein-Tyrosine Kinases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment; D017384:Sequence Deletion; D017386:Sequence Homology, Amino Acid; D014960:X Chromosome; D018909:src Homology Domains
chemical_list: D004251:DNA Transposable Elements; C089848:Tec protein-tyrosine kinase; D011505:Protein-Tyrosine Kinases; D000077329:Agammaglobulinaemia Tyrosine Kinase; C000625949:BTK protein, human