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1d4t

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{{STRUCTURE_1d4t| PDB=1d4t | SCENE= }}
{{STRUCTURE_1d4t| PDB=1d4t | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE XLP PROTEIN SAP IN COMPLEX WITH A SLAM PEPTIDE'''
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===CRYSTAL STRUCTURE OF THE XLP PROTEIN SAP IN COMPLEX WITH A SLAM PEPTIDE===
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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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{{ABSTRACT_PUBMED_10549287}}
==About this Structure==
==About this Structure==
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[[Category: Signal transduction]]
[[Category: Signal transduction]]
[[Category: Tyrosine kinase]]
[[Category: Tyrosine kinase]]
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Revision as of 19:24, 30 June 2008

Image:1d4t.png

Template:STRUCTURE 1d4t

CRYSTAL STRUCTURE OF THE XLP PROTEIN SAP IN COMPLEX WITH A SLAM PEPTIDE

Template:ABSTRACT PUBMED 10549287

About this Structure

1D4T is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

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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