1fyr

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spinqualitylabelsall models 1fyr, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

DIMER FORMATION THROUGH DOMAIN SWAPPING IN THE CRYSTAL STRUCTURE OF THE GRB2-SH2 AC-PYVNV COMPLEX

Contents 1 Overview 2 Disease 3 About this Structure 4 Reference

Overview

Src homology 2 (SH2) domains are key modules in intracellular signal, transduction. They link activated cell surface receptors to downstream, targets by binding to phosphotyrosine-containing sequence motifs. The, crystal structure of a Grb2-SH2 domain-phosphopeptide complex was, determined at 2.4 A resolution. The asymmetric unit contains four, polypeptide chains. There is an unexpected domain swap so that individual, chains do not adopt a closed SH2 fold. Instead, reorganization of the EF, loop leads to an open, nonglobular fold, which associates with an, equivalent partner to generate an intertwined dimer. As in previously, reported crystal structures of canonical Grb2-SH2 domain-peptide, complexes, each of the four hybrid SH2 domains in the two domain-swapped, dimers binds the phosphopeptide in a type I beta-turn conformation. This, report is the first to describe domain swapping for an SH2 domain. While, in vivo evidence of dimerization of Grb2 exists, our SH2 dimer is, metastable and a physiological role of this new form of dimer formation, remains to be demonstrated.

Disease

Known diseases associated with this structure: Autism, suseptibility to, 9 OMIM:[164860], Central hypoventilation syndrome, congenital OMIM:[100790], Haddad syndrome OMIM:[100790], Hepatocellular carcinoma, childhood type OMIM:[164860], Renal cell carcinoma, papillary, familial and sporadic OMIM:[164860]

About this Structure

1FYR is a Protein complex structure of sequences from Homo sapiens with ACE as ligand. Full crystallographic information is available from OCA.

Reference

Dimer formation through domain swapping in the crystal structure of the Grb2-SH2-Ac-pYVNV complex., Schiering N, Casale E, Caccia P, Giordano P, Battistini C, Biochemistry. 2000 Nov 7;39(44):13376-82. PMID:11063574

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