2Z0P image
Entry Detail
PDB ID:
2Z0P
Title:
Crystal structure of PH domain of Bruton's tyrosine kinase
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2007-05-07
Release Date:
2008-05-13
Method Details:
Experimental Method:
Resolution:
2.58 Å
R-Value Free:
0.3
R-Value Work:
0.24
R-Value Observed:
0.24
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Tyrosine-protein kinase BTK
Chain IDs:A, B, C, D
Chain Length:169
Number of Molecules:4
Biological Source:Homo sapiens
Primary Citation
Crystal structure of the Bruton's tyrosine kinase PH domain with phosphatidylinositol
Biochem.Biophys.Res.Commun. 377 23 28 (2008)
PMID: 18809383 DOI: 10.1016/j.bbrc.2008.09.055

Abstact

Bruton's tyrosine kinase (Btk) of the Tec family possesses a Pleckstrin homology (PH) domain, which is responsible for plasma membrane targeting. In this study, the crystal structure of the Btk PH domain in complex with dibutylyl-phosphatidylinositol-3,4,5-triphosphate was determined. The structure revealed that the Btk PH domain forms a homodimer and that each molecule binds phosphatidylinositol in the binding pocket. The side chain of Lys18 within a Btk-specific insertion in the beta1-beta2 loop is able to form a hydrogen bond with the diacylglycerol moiety of phosphatidylinositol. The other Btk-specific insertion in the beta5-beta6 loop constitutes the dimerization interface. Thus, the modes of phosphatidylinositol recognition and Btk PH domain dimerization are distinct from those of other PH domains.

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Primary Citation of related structures