1d1z: Difference between revisions

Revision as of 22:08, 30 June 2008

This article has been automatically seeded. Changes to this page should pertain to the PDB entry only and not to the protein or biomolecule in general.

File:1d1z.png

Template:STRUCTURE 1d1z

CRYSTAL STRUCTURE OF THE XLP PROTEIN SAPCRYSTAL STRUCTURE OF THE XLP PROTEIN SAP

Template:ABSTRACT PUBMED 10549287

About this StructureAbout this Structure

1D1Z is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

ReferenceReference

Crystal structures of the XLP protein SAP reveal a class of SH2 domains with extended, phosphotyrosine-independent sequence recognition., Poy F, Yaffe MB, Sayos J, Saxena K, Morra M, Sumegi J, Cantley LC, Terhorst C, Eck MJ, Mol Cell. 1999 Oct;4(4):555-61. PMID:10549287

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OCA

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-==Overview==
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-SAP, the product of the gene mutated in X-linked lymphoproliferative syndrome (XLP), consists of a single SH2 domain that has been shown to bind the cytoplasmic tail of the lymphocyte coreceptor SLAM. Here we describe structures that show that SAP binds phosphorylated and nonphosphorylated SLAM peptides in a similar mode, with the tyrosine or phosphotyrosine residue inserted into the phosphotyrosine-binding pocket. We find that specific interactions with residues N-terminal to the tyrosine, in addition to more characteristic C-terminal interactions, stabilize the complexes. A phosphopeptide library screen and analysis of mutations identified in XLP patients confirm that these extended interactions are required for SAP function. Further, we show that SAP and the similar protein EAT-2 recognize the sequence motif TIpYXX(V/I).
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 [[Category: Yaffe, M B.]]
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