1goz

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{{STRUCTURE_1goz| PDB=1goz | SCENE= }}
{{STRUCTURE_1goz| PDB=1goz | SCENE= }}
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'''STRUCTURAL BASIS FOR THE ALTERED T-CELL RECEPTOR BINDING SPECIFICTY IN A SUPERANTIGENIC STAPHYLOCOCCUS AUREUS ENTEROTOXIN-B MUTANT'''
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===STRUCTURAL BASIS FOR THE ALTERED T-CELL RECEPTOR BINDING SPECIFICTY IN A SUPERANTIGENIC STAPHYLOCOCCUS AUREUS ENTEROTOXIN-B MUTANT===
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==Overview==
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Bacterial superantigens are potent T-cell stimulatory protein molecules produced by Staphylococcus aureus and Streptococcus pyogenes. Their superantigenic activity can be attributed to their ability to cross-link major histocompatibility complex class II molecules with T-cell receptors (TCRs) to form a tri-molecular complex. Each superantigen is known to interact with a specific V(beta) element of TCR. Staphylococcal enterotoxin B (SEB, a superantigen), a primary cause of food poisoning, is also responsible for a significant percentage of non-menstrual associated toxic shock syndrome in patients with a variety of staphylococcal infections. Structural studies have elucidated a binding cavity on the toxin molecule essential for TCR binding. To understand the crucial residues involved in binding, mutagenesis analysis was performed. Our analysis suggest that mutation of a conserved residue Thr(112) to Ser (T112S) in the binding cavity induces a selective reduction in the affinity for binding one TCR V(beta) family and can be attributed to the structural differences in the native and mutant toxins. We present a detailed comparison of the mutant structure determined at 2.0 A with the previously reported native SEB and SEB-TCR V(beta) complex structures.
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(as it appears on PubMed at http://www.pubmed.gov), where 11704673 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11704673}}
==About this Structure==
==About this Structure==
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[[Category: Seb]]
[[Category: Seb]]
[[Category: Staphylococcal enterotoxin]]
[[Category: Staphylococcal enterotoxin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 05:37:40 2008''

Revision as of 02:37, 1 July 2008

Image:1goz.png

Template:STRUCTURE 1goz

STRUCTURAL BASIS FOR THE ALTERED T-CELL RECEPTOR BINDING SPECIFICTY IN A SUPERANTIGENIC STAPHYLOCOCCUS AUREUS ENTEROTOXIN-B MUTANT

Template:ABSTRACT PUBMED 11704673

About this Structure

1GOZ is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.

Reference

Structural and functional role of threonine 112 in a superantigen Staphylococcus aureus enterotoxin B., Baker MD, Papageorgiou AC, Titball RW, Miller J, White S, Lingard B, Lee JJ, Cavanagh D, Kehoe MA, Robinson JH, Acharya KR, J Biol Chem. 2002 Jan 25;277(4):2756-62. Epub 2001 Nov 9. PMID:11704673

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