1ED3

CRYSTAL STRUCTURE OF RAT MINOR HISTOCOMPATIBILITY ANTIGEN COMPLEX RT1-AA/MTF-E.

DOI: 10.2210/pdb1ED3/pdb

Classification: IMMUNE SYSTEM
Organism(s): Rattus norvegicus
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2000-01-26 Released: 2001-02-28
Deposition Author(s): Speir, J.A., Stevens, J., Joly, E., Butcher, G.W., Wilson, I.A.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.55 Å
R-Value Free: 0.282
R-Value Work: 0.222

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Two different, highly exposed, bulged structures for an unusually long peptide bound to rat MHC class I RT1-Aa.

Speir, J.A., Stevens, J., Joly, E., Butcher, G.W., Wilson, I.A.

(2001) Immunity 14: 81-92

PubMed: 11163232 Search on PubMed
DOI: 10.1016/s1074-7613(01)00091-7
Primary Citation of Related Structures:
1ED3

PubMed Abstract:

The rat MHC class Ia molecule RT1-Aa has the unusual capacity to bind long peptides ending in arginine, such as MTF-E, a thirteen-residue, maternally transmitted minor histocompatibility antigen. The antigenic structure of MTF-E was unpredictable due to its extraordinary length and two arginines that could serve as potential anchor residues. The crystal structure of RT1-Aa-MTF-E at 2.55 A shows that both peptide termini are anchored, as in other class I molecules, but the central residues in two independent pMHC complexes adopt completely different bulged conformations based on local environment. The MTF-E epitope is fully exposed within the putative T cell receptor (TCR) footprint. The flexibility demonstrated by the MTF-E structures illustrates how different TCRs may be raised against chemically identical, but structurally dissimilar, pMHC complexes.

Related Citations:

Identification of the rat maternally transmitted minor histocompatibility antigen
Bhuyan, P.K., Young, L.L., Lindahl, K.F., Butcher, G.W.
(1997) J Immunol 158: 3753

Efficient generation of major histocompatibility complex class I-peptide complexes using synthetic peptide libraries
Stevens, J., Wiesmuller, K.-H., Barker, P.J., Walden, P., Bucher, G.W., Joly, E.
(1998) J Biol Chem 273: 2874

Peptide length preferences for rat and mouse MHC class I molecules using random peptide libraries
Stevens, J., Wiesmuller, K.-H., Walden, P., Joly, E.
(1998) Eur J Biochem 28: 1272

The rat cim effect: TAP allele-dependent changes in a class I MHC anchor motif and evidence against C-terminal trimming of peptides in the ER
Powis, S.J., Young, L.L., Joly, E., Barker, P.J., Richardson, L., Brandt, R.P., Melief, C.J., Howard, J.C., Butcher, G.W.
(1996) Immunity 4: 159

An analysis of the antigen binding site of RT1-Aa suggests an allele-specific motif
Thorpe, C.J., Moss, D.S., Powis, S.J., Howard, J.C., Butcher, G.W., Travers, P.J.
(1995) Immunogenetics 41: 329

Organizational Affiliation:

Department of Molecular Biology and, Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

Macromolecules

Find similar proteins by:

(by identity cutoff) | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CLASS I MAJOR HISTOCOMPATIBILITY ANTIGEN RT1-AA	A, D	275	Rattus norvegicus	Mutation(s): 0
Find proteins for P16391 (Rattus norvegicus) Explore P16391 Go to UniProtKB: P16391
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Reference Sequence

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(by identity cutoff) | Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-2-MICROGLOBULIN	B, E	99	Rattus norvegicus	Mutation(s): 0 Gene Names: B2m
Find proteins for P07151 (Rattus norvegicus) Explore P07151 Go to UniProtKB: P07151
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Reference Sequence

Find similar proteins by: Sequence | Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDE MTF-E (13N3E)	C, F	13	N/A	Mutation(s): 0
Find proteins for P05504 (Rattus norvegicus) Explore P05504 Go to UniProtKB: P05504
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Reference Sequence