1t0m

From Proteopedia

(Difference between revisions)

Revision as of 07:03, 6 November 2019

Conformational switch in polymorphic H-2K molecules containing an HSV peptide

Structural highlights

1t0m is a 6 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1t0n
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[HA1B_MOUSE] Involved in the presentation of foreign antigens to the immune system. [GB_HHV1F] Envelope glycoprotein that forms spikes at the surface of virion envelope. Essential for the initial attachment to heparan sulfate moities of the host cell surface proteoglycans. Involved in fusion of viral and cellular membranes leading to virus entry into the host cell. Following initial binding of gD to one of its receptors, membrane fusion is mediated by the fusion machinery composed at least of gB and the heterodimer gH/gL. May also be involved in the fusion between the virion envelope and the outer nuclear membrane during virion egress. Also plays a role, together with gK, in virus-induced cell-to-cell fusion (syncytia formation) (By similarity).^[1] [B2MG_MOUSE] Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Polymorphism within the MHC not only affects peptide specificity but also has a critical influence on the T cell repertoire; for example, the CD8 T cell response toward an immunodominant HSV glycoprotein B peptide is more diverse and of higher avidity in H-2(bm8) compared with H-2(b) mice. We have examined the basis for the selection of these distinct antiviral T cell repertoires by comparing the high-resolution structures of K(b) and K(bm8), in complex with cognate peptide Ag. Although K(b) and K(bm8) differ by four residues within the Ag-binding cleft, the most striking difference in the two structures was the disparate conformation adopted by the shared residue, Arg(62). The altered dynamics of Arg(62), coupled with a small rigid-body movement in the alpha(1) helix encompassing this residue, correlated with biased Valpha usage in the B6 mice. Moreover, an analysis of all known TCR/MHC complexes reveals that Arg(62) invariably interacts with the TCR CDR1alpha loop. Accordingly, Arg(62) appears to function as a conformational switch that may govern T cell selection and protective immunity.

The structure of H-2K(b) and K(bm8) complexed to a herpes simplex virus determinant: evidence for a conformational switch that governs T cell repertoire selection and viral resistance.,Webb AI, Borg NA, Dunstone MA, Kjer-Nielsen L, Beddoe T, McCluskey J, Carbone FR, Bottomley SP, Aguilar MI, Purcell AW, Rossjohn J J Immunol. 2004 Jul 1;173(1):402-9. PMID:15210799^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Farnsworth A, Wisner TW, Webb M, Roller R, Cohen G, Eisenberg R, Johnson DC. Herpes simplex virus glycoproteins gB and gH function in fusion between the virion envelope and the outer nuclear membrane. Proc Natl Acad Sci U S A. 2007 Jun 12;104(24):10187-92. Epub 2007 Jun 4. PMID:17548810 doi:http://dx.doi.org/10.1073/pnas.0703790104
↑ Webb AI, Borg NA, Dunstone MA, Kjer-Nielsen L, Beddoe T, McCluskey J, Carbone FR, Bottomley SP, Aguilar MI, Purcell AW, Rossjohn J. The structure of H-2K(b) and K(bm8) complexed to a herpes simplex virus determinant: evidence for a conformational switch that governs T cell repertoire selection and viral resistance. J Immunol. 2004 Jul 1;173(1):402-9. PMID:15210799

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1t0m"

@@ Line 1: / Line 1: @@
 ==Conformational switch in polymorphic H-2K molecules containing an HSV peptide==
-<StructureSection load='1t0m' size='340' side='right' caption='[[1t0m]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
+<StructureSection load='1t0m' size='340' side='right'caption='[[1t0m]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1t0m]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T0M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1T0M FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 ==See Also==
-*[[Beta-2 microglobulin|Beta-2 microglobulin]]
+*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
-*[[Major histocompatibility complex|Major histocompatibility complex]]
+*[[MHC 3D structures of MHC|MHC 3D structures of MHC]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Lk3 transgenic mice]]
 [[Category: Beddoe, T]]

1t0m

From Proteopedia

Revision as of 07:03, 6 November 2019

Conformational switch in polymorphic H-2K molecules containing an HSV peptide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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