1KB5

MURINE T-CELL RECEPTOR VARIABLE DOMAIN/FAB COMPLEX

DOI: 10.2210/pdb1KB5/pdb

Classification: COMPLEX (IMMUNOGLOBULIN/RECEPTOR)
Organism(s): Mus musculus
Expression System: Mus musculus
Mutation(s): No

Deposited: 1997-04-06 Released: 1998-04-08
Deposition Author(s): Housset, D., Mazza, G., Gregoire, C., Piras, C., Malissen, B., Fontecilla-Camps, J.C.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.50 Å
R-Value Work: 0.219
R-Value Observed: 0.221

wwPDB Validation 3D Report Full Report

This is version 1.4 of the entry. See complete history.

Literature

The three-dimensional structure of a T-cell antigen receptor V alpha V beta heterodimer reveals a novel arrangement of the V beta domain.

Housset, D., Mazza, G., Gregoire, C., Piras, C., Malissen, B., Fontecilla-Camps, J.C.

(1997) EMBO J 16: 4205-4216

PubMed: 9250664 Search on PubMedSearch on PubMed Central
DOI: 10.1093/emboj/16.14.4205
Primary Citation of Related Structures:
1KB5

PubMed Abstract:

The crystal structure of a mouse T-cell antigen receptor (TCR) Fv fragment complexed to the Fab fragment of a specific anti-clonotypic antibody has been determined to 2.6 A resolution. The polypeptide backbone of the TCR V alpha domain is very similar to those of other crystallographically determined V alphas, whereas the V beta structure is so far unique among TCR V beta domains in that it displays a switch of the c" strand from the inner to the outer beta-sheet. The beta chain variable region of this TCR antigen-binding site is characterized by a rather elongated third complementarity-determining region (CDR3beta) that packs tightly against the CDR3 loop of the alpha chain, without leaving any intervening hydrophobic pocket. Thus, the conformation of the CDR loops with the highest potential diversity distinguishes the structure of this TCR antigen-binding site from those for which crystallographic data are available. On the basis of all these results, we infer that a significant conformational change of the CDR3beta loop found in our TCR is required for binding to its cognate peptide-MHC ligand.

Related Citations:

An Alphabeta T Cell Receptor Structure at 2.5 A and its Orientation in the Tcr-Mhc Complex
Garcia, K.C., Degano, M., Stanfield, R.L., Brunmark, A., Jackson, M.R., Peterson, P.A., Teyton, L., Wilson, I.A.
(1996) Science 274: 209

Structure of the Complex between Human T-Cell Receptor, Viral Peptide and Hla-A2
Garboczi, D.N., Ghosh, P., Utz, U., Fan, Q.R., Biddison, W.E., Wiley, D.C.
(1996) Nature 384: 134

Crystal Structure of the Beta Chain of a T Cell Antigen Receptor
Bentley, G.A., Boulot, G., Karjalainen, K., Mariuzza, R.A.
(1995) Science 267: 1984

Crystal Structure of the V Alpha Domain of a T Cell Antigen Receptor
Fields, B.A., Ober, B., Malchiodi, E.L., Lebedeva, M.I., Braden, B.C., Ysern, X., Kim, J.K., Shao, X., Ward, E.S., Mariuzza, R.A.
(1995) Science 270: 1821

Engineered Secreted T-Cell Receptor Alpha Beta Heterodimers
Gregoire, C., Rebai, N., Schweisguth, F., Necker, A., Mazza, G., Auphan, N., Millward, A., Schmitt-Verhulst, A.M., Malissen, B.
(1991) Proc Natl Acad Sci U S A 88: 8077

Organizational Affiliation:

Laboratoire de Cristallographie et Cristallogénèse des Protéines, Institut de Biologie Structurale Jean-Pierre Ebel CEA-CNRS, Grenoble, France.

Macromolecules

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(by identity cutoff) | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
KB5-C20 T-CELL ANTIGEN RECEPTOR	A	115	Mus musculus	Mutation(s): 0
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Reference Sequence

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Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
KB5-C20 T-CELL ANTIGEN RECEPTOR	B	117	Mus musculus	Mutation(s): 0
Find proteins for P04214 (Mus musculus) Explore P04214 Go to UniProtKB: P04214
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Reference Sequence

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Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
ANTIBODY DESIRE-1	L	214	Mus musculus	Mutation(s): 0 Gene Names: Igkc
Find proteins for P01837 (Mus musculus) Explore P01837 Go to UniProtKB: P01837
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Reference Sequence

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(by identity cutoff) | Structure

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
ANTIBODY DESIRE-1	H	219	Mus musculus	Mutation(s): 0 Gene Names: Igh-1a
Find proteins for P01865 (Mus musculus) Explore P01865 Go to UniProtKB: P01865
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Reference Sequence