PDBsum entry 5glj

Hydrolase

PDB id: 5glj

Contents

Protein chains

96 a.a.

Metals

_CL ×4

Waters ×491

References listed in PDB file

Key reference

• Title: High-Resolution crystal structure of the pdz1 domain of human protein tyrosine phosphatase ptp-Bas.
• Authors: S.O.Lee, M.K.Lee, B.Ku, K.H.Bae, S.C.Lee, H.M.Lim, S.J.Kim, S.W.Chi.
• Ref.: Biochem Biophys Res Commun, 2016, 478, 1205-1210. [DOI no: 10.1016/j.bbrc.2016.08.095]
• PubMed id: 27544031

Abstract

Protein tyrosine phosphatase-Basophil (PTP-Bas) is a membrane-associated protein tyrosine phosphatase with five PDZ domains and is involved in apoptosis, tumorigenesis, and insulin signaling. The interaction between PTP-Bas and tandem-PH-domain-containing protein 1/2 (TAPP1/2) plays an essential role in the regulation of insulin signaling. Despite its high sequence homology with the other PDZ domains, only the PDZ1 domain of PTP-Bas showed distinct binding specificity for TAPP1/2. Although the interaction between PTP-Bas PDZ1 and TAPP1/2 is a therapeutic target for diabetes, the structural basis for the interaction has not been elucidated. In the present study, we determined the crystal structure of the PTP-Bas PDZ1 domain at 1.6 Å resolution. In addition, we calculated the structural models of complexes of PTP-Bas PDZ1 and the C-terminal peptides of TAPP1/2 (referred to as TAPP1p/2p). Structural comparison with the PTP-Bas PDZ2/RA-GEF2 peptide complex revealed a structural basis for distinct binding specificity of PTP-Bas PDZ1 for TAPP1p/2p peptides. Our high-resolution crystal structure of PTP-Bas PDZ1 will serve as a useful template for rational structure-based design of novel anti-diabetes therapeutics.