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Title 

High-resolution crystal structure of the PDZ1 domain of human protein tyrosine phosphatase PTP-Bas

Authors 

Sang-Ok LeeMi-Kyung LeeBonsu KuKwang-Hee BaeSang Chul LeeH M LimSeung Jun KimSeung-Wook Chi

Publisher 

Elsevier

Issue Date 

2016

Citation 

Biochemical and Biophysical Research Communications, vol. 478, no. 0, pp. 1205-1210

Keywords 

Binding specificityCrystal structurePDZ domainProtein tyrosine phosphatase-BasophilTandem-PH-domain-containing protein-1

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?? 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.

ISSN 

0006-291X

Link 

http://dx.doi.org/10.1016/j.bbrc.2016.08.095

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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