1osz

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{{STRUCTURE_1osz| PDB=1osz | SCENE= }}
{{STRUCTURE_1osz| PDB=1osz | SCENE= }}
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'''MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND AN (L4V) MUTANT OF THE VESICULAR STOMATITIS VIRUS NUCLEOPROTEIN'''
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===MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND AN (L4V) MUTANT OF THE VESICULAR STOMATITIS VIRUS NUCLEOPROTEIN===
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==Overview==
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The T lineage repertoire is shaped by T cell receptor (TCR)-dependent positive and negative thymic selection processes. Using TCR-transgenic (N15tg) beta2-microglobulin-deficient (beta2m-/-) RAG-2(-/-) H-2(b) mice specific for the VSV8 (RGYVYQGL) octapeptide bound to Kb, we identified a single weak agonist peptide variant V4L (L4) inducing phenotypic and functional T cell maturation. The cognate VSV8 peptide, in contrast, triggers negative selection. The crystal structure of L4/Kb was determined and refined to 2.1 A for comparison with the VSV8/Kb structure at similar resolution. Aside from changes on the p4 side chain of L4 and the resulting alteration of the exposed Kb Lys-66 side chain, these two structures are essentially identical. Hence, a given TCR recognizes subtle distinctions between highly related ligands, resulting in dramatically different selection outcomes. Based on these finding and the recent structural elucidation of the N15-VSV8/Kb complex, moreover, it appears that the germ-line Valpha repertoire contributes in a significant way to positive selection.
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{{ABSTRACT_PUBMED_9707600}}
==About this Structure==
==About this Structure==
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[[Category: Thymic selection]]
[[Category: Thymic selection]]
[[Category: Transmembrane protein]]
[[Category: Transmembrane protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 09:48:06 2008''

Revision as of 06:48, 29 July 2008

Image:1osz.png

Template:STRUCTURE 1osz

MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND AN (L4V) MUTANT OF THE VESICULAR STOMATITIS VIRUS NUCLEOPROTEIN

Template:ABSTRACT PUBMED 9707600

About this Structure

1OSZ is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.

Reference

Differential thymic selection outcomes stimulated by focal structural alteration in peptide/major histocompatibility complex ligands., Ghendler Y, Teng MK, Liu JH, Witte T, Liu J, Kim KS, Kern P, Chang HC, Wang JH, Reinherz EL, Proc Natl Acad Sci U S A. 1998 Aug 18;95(17):10061-6. PMID:9707600

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