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PMID: 11060013 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Structure of a covalently stabilized complex of a human alphabeta T-cell receptor, influenza HA peptide and MHC class II molecule, HLA-DR1.

The EMBO journal ·Vol. 19 ·No. 21 ·2000-11-01 ·Pages 5611-24

Hennecke J, Carfi A, Wiley DC

Abstract

An alphabeta T-cell receptor (alphabetaTCR)/hemagglutinin (HA) peptide/human leukocyte antigen (HLA)-DR1 complex was stabilized by flexibly linking the HA peptide with the human HA1.7 alphabetaTCR, to increase the local concentration of the interacting proteins once the peptide has been loaded onto the major histocompatibility complex (MHC) molecule. The structure of the complex, determined by X-ray crystallography, has a binding mode similar to that of the human B7 alphabetaTCR on a pMHCI molecule. Twelve of the 15 MHC residues contacted are at the same positions observed earlier in class I MHC/peptide/TCR complexes. One contact, to an MHC loop outside the peptide-binding site, is conserved and specific to pMHCII complexes. TCR gene usage in the response to HA/HLA-DR appears to conserve charged interactions between three lysines of the peptide and acidic residues on the TCR.

MeSH Terms
Amino Acid Sequence Binding Sites/genetics Crystallography, X-Ray Drug Stability HLA-DR1 Antigen/chemistry,genetics Hemagglutinin Glycoproteins, Influenza Virus/chemistry,genetics Humans In Vitro Techniques Macromolecular Substances Models, Molecular Molecular Sequence Data Protein Conformation Protein Engineering Protein Folding Receptors, Antigen, T-Cell, alpha-beta/chemistry,genetics Recombinant Proteins/chemistry,genetics Sequence Homology, Amino Acid Static Electricity
Chemicals
HLA-DR1 Antigen Hemagglutinin Glycoproteins, Influenza Virus Macromolecular Substances Receptors, Antigen, T-Cell, alpha-beta Recombinant Proteins
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Hennecke J
Department of Molecular and Cellular Biology, Harvard University, Howard Hughes Medical Institute, 7 Divinity Avenue, Cambridge, MA 02138, USA.
Carfi A
Wiley D C
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Article Info
Journal
The EMBO journal
Abbr.
EMBO J
ISSN
0261-4189
Published
2000-11-01
Pages
5611-24
Language
English
Region
England
NLM ID
8208664
PMCID
PMC305780
Subset
IM
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