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1vac

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Revision as of 07:34, 30 December 2020

MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND CHICKEN OVALBUMIN

Structural highlights

1vac is a 3 chain structure with sequence from Chick and Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	BETA-2-MICROGLOBULIN (LK3 transgenic mice)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[HA1B_MOUSE] Involved in the presentation of foreign antigens to the immune system. [OVAL_CHICK] Non-inhibitory serpin. Storage protein of egg white.^[1] ^[2] [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

Sequence analysis of peptides naturally presented by major histocompatibility complex (MHC) class I molecules has revealed allele-specific motifs in which the peptide length and the residues observed at certain positions are restricted. Nevertheless, peptides containing the standard motif often fail to bind with high affinity or form physiologically stable complexes. Here we present the crystal structure of a well-characterized antigenic peptide from ovalbumin [OVA-8, ovalbumin-(257-264), SIINFEKL] in complex with the murine MHC class I H-2Kb molecule at 2.5-A resolution. Hydrophobic peptide residues Ile-P2 and Phe-P5 are packed closely together into binding pockets B and C, suggesting that the interplay of peptide anchor (P5) and secondary anchor (P2) residues can couple the preferred sequences at these positions. Comparison with the crystal structures of H-2Kb in complex with peptides VSV-8 (RGYVYQGL) and SEV-9 (FAPGNYPAL), where a Tyr residue is used as the C pocket anchor, reveals that the conserved water molecule that binds into the B pocket and mediates hydrogen bonding from the buried anchor hydroxyl group could not be likewise positioned if the P2 side chain were of significant size. Based on this structural evidence, H-2Kb has at least two submotifs: one with Tyr at P5 (or P6 for nonamer peptides) and a small residue at P2 (i.e., Ala or Gly) and another with Phe at P5 and a medium-sized hydrophobic residue at P2 (i.e., Ile). Deciphering of these secondary submotifs from both crystallographic and immunological studies of MHC peptide binding should increase the accuracy of T-cell epitope prediction.

Crystal structure of an H-2Kb-ovalbumin peptide complex reveals the interplay of primary and secondary anchor positions in the major histocompatibility complex binding groove.,Fremont DH, Stura EA, Matsumura M, Peterson PA, Wilson IA Proc Natl Acad Sci U S A. 1995 Mar 28;92(7):2479-83. PMID:7708669^[3]

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

References

↑ Meek RL, Walsh KA, Palmiter RD. The signal sequence of ovalbumin is located near the NH2 terminus. J Biol Chem. 1982 Oct 25;257(20):12245-51. PMID:6749856
↑ Robinson A, Meredith C, Austen BM. Isolation and properties of the signal region from ovalbumin. FEBS Lett. 1986 Jul 28;203(2):243-6. PMID:3732511
↑ Fremont DH, Stura EA, Matsumura M, Peterson PA, Wilson IA. Crystal structure of an H-2Kb-ovalbumin peptide complex reveals the interplay of primary and secondary anchor positions in the major histocompatibility complex binding groove. Proc Natl Acad Sci U S A. 1995 Mar 28;92(7):2479-83. PMID:7708669

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/1vac"

@@ Line 1: / Line 1: @@
 ==MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND CHICKEN OVALBUMIN==
-<StructureSection load='1vac' size='340' side='right' caption='[[1vac]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
+<StructureSection load='1vac' size='340' side='right'caption='[[1vac]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1vac]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [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=1VAC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1VAC FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1vac]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [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=1VAC OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1VAC FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BETA-2-MICROGLOBULIN ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1vac FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1vac OCA], [http://pdbe.org/1vac PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1vac RCSB], [http://www.ebi.ac.uk/pdbsum/1vac PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1vac ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1vac FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1vac OCA], [http://pdbe.org/1vac PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1vac RCSB], [http://www.ebi.ac.uk/pdbsum/1vac PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1vac ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ 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|MHC 3D structures]]
 == References ==
 <references/>
@@ Line 37: / Line 37: @@
 </StructureSection>
 [[Category: Chick]]
+[[Category: Large Structures]]
 [[Category: Lk3 transgenic mice]]
 [[Category: Fremont, D H]]

1vac

From Proteopedia

Revision as of 07:34, 30 December 2020

MHC CLASS I H-2KB HEAVY CHAIN COMPLEXED WITH BETA-2 MICROGLOBULIN AND CHICKEN OVALBUMIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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