1mi5
From Proteopedia
(New page: 200px<br /> <applet load="1mi5" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mi5, resolution 2.5Å" /> '''The crystal structur...) |
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| - | [[Image:1mi5.gif|left|200px]]<br /> | + | [[Image:1mi5.gif|left|200px]]<br /><applet load="1mi5" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="1mi5" size=" | + | |
caption="1mi5, resolution 2.5Å" /> | caption="1mi5, resolution 2.5Å" /> | ||
'''The crystal structure of LC13 TcR in complex with HLAB8-EBV peptide complex'''<br /> | '''The crystal structure of LC13 TcR in complex with HLAB8-EBV peptide complex'''<br /> | ||
==Overview== | ==Overview== | ||
| - | We have examined the basis for immunodominant or "public" TCR usage in an | + | We have examined the basis for immunodominant or "public" TCR usage in an antiviral CTL response. Residues encoded by each of the highly selected genetic elements of an immunodominant clonotype recognizing Epstein-Barr virus were critical to the antigen specificity of the receptor. Upon recognizing antigen, the immunodominant TCR undergoes extensive conformational changes in the complementarity determining regions (CDRs), including the disruption of the canonical structures of the germline-encoded CDR1alpha and CDR2alpha loops to produce an enhanced fit with the HLA-peptide complex. TCR ligation induces conformational changes in the TCRalpha constant domain thought to form part of the docking site for CD3epsilon. These findings indicate that TCR immunodominance is associated with structural properties conferring receptor specificity and suggest a novel structural link between TCR ligation and intracellular signaling. |
==Disease== | ==Disease== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1MI5 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http:// | + | 1MI5 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MI5 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
| - | [[Category: Brooks, A | + | [[Category: Brooks, A G.]] |
| - | [[Category: Burrows, S | + | [[Category: Burrows, S R.]] |
| - | [[Category: Clements, C | + | [[Category: Clements, C S.]] |
[[Category: Kjer-Nielsen, L.]] | [[Category: Kjer-Nielsen, L.]] | ||
[[Category: McCluskey, J.]] | [[Category: McCluskey, J.]] | ||
| - | [[Category: Purcell, A | + | [[Category: Purcell, A W.]] |
[[Category: Rossjohn, J.]] | [[Category: Rossjohn, J.]] | ||
| - | [[Category: Whisstock, J | + | [[Category: Whisstock, J C.]] |
[[Category: epstein barr virus]] | [[Category: epstein barr virus]] | ||
[[Category: hla b8]] | [[Category: hla b8]] | ||
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[[Category: t cell receptor]] | [[Category: t cell receptor]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:55:23 2008'' |
Revision as of 11:55, 21 February 2008
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The crystal structure of LC13 TcR in complex with HLAB8-EBV peptide complex
Contents |
Overview
We have examined the basis for immunodominant or "public" TCR usage in an antiviral CTL response. Residues encoded by each of the highly selected genetic elements of an immunodominant clonotype recognizing Epstein-Barr virus were critical to the antigen specificity of the receptor. Upon recognizing antigen, the immunodominant TCR undergoes extensive conformational changes in the complementarity determining regions (CDRs), including the disruption of the canonical structures of the germline-encoded CDR1alpha and CDR2alpha loops to produce an enhanced fit with the HLA-peptide complex. TCR ligation induces conformational changes in the TCRalpha constant domain thought to form part of the docking site for CD3epsilon. These findings indicate that TCR immunodominance is associated with structural properties conferring receptor specificity and suggest a novel structural link between TCR ligation and intracellular signaling.
Disease
Known diseases associated with this structure: Abacavir hypersensitivity, susceptibility to OMIM:[142830], Hypoproteinemia, hypercatabolic OMIM:[109700], Spondyloarthropathy, susceptibility to, 1 OMIM:[142830], Stevens-Johnson syndrome, carbamazepine-induced, susceptibility to OMIM:[142830]
About this Structure
1MI5 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
A structural basis for the selection of dominant alphabeta T cell receptors in antiviral immunity., Kjer-Nielsen L, Clements CS, Purcell AW, Brooks AG, Whisstock JC, Burrows SR, McCluskey J, Rossjohn J, Immunity. 2003 Jan;18(1):53-64. PMID:12530975
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