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Structural comparison between retro‐inverso and parent peptides: Molecular basis for the biological activity of a retro‐inverso analogue of the immunodominant fragment of VP1 coat protein from foot‐and‐mouth disease virus

Identifieur interne : 00CE38 ( Main/Exploration ); précédent : 00CE37; suivant : 00CE39

Structural comparison between retro‐inverso and parent peptides: Molecular basis for the biological activity of a retro‐inverso analogue of the immunodominant fragment of VP1 coat protein from foot‐and‐mouth disease virus

Auteurs : John A. Carver [Italie, Australie] ; Gennaro Esposito [Italie] ; Paolo Viglino [Italie] ; Federico Fogolari [Italie] ; Gilles Guichard [France] ; Jean-Paul Briand [France] ; Marc H. V. Van Regenmortel [France] ; Fred Brown [États-Unis] ; Paolo Mascagni [Italie]

Source :

RBID : ISTEX:79E3EAAD9A77C2E78765B45A09BCCC05DC33E20C

English descriptors

Abstract

Antibodies induced against intact foot‐and‐mouth disease Virus (FMDV) particles bind to the retro‐inverso analogue of fragment 141–159 of the viral coat protein VP1 of FMDV, variant A, equally well as to the parent peptide. A conformational investigation of this retro‐inverso peptide was carried out by nmr spectroscopy and restrained molecular modeling in order to identify the structural basis for the antigenic mimicry between these retro‐inverso and parent peptides. In 100% trifluoroethanol a well‐defined left‐handed α‐helical region exists from residue 150 to residue 159, which is consistently present in all conformational families obtained from restrained modelling. A less‐defined left‐handed helical region is present in the tract 144–148, which is also consistent for all structures. Conformational flexibility exists about Gly149, which leads to two types of structures, either bent or linear. In the bent structures, a three‐residue inverse tight turn is found, which can be classified as an inverse γ‐turn centered at Gly149. The overall structural features of the retro‐inverso peptide are shown to be similar to those of the parent L‐peptide. The two molecules, however, are roughly mirror images because they share inherently chiral secondary structure elements. By comparing these conformational conclusions with the x‐ray structure of the Fab complex of a corresponding VP1 antigenic fragment, a rationale is proposed to account for the topological requirements of specific recognition that are implied by the equivalent antigenic activity of the natural and retro‐inverso compounds. © 1997 John Wiley & Sons, Inc. Biopoly 41: 569–590, 1997.

Url:
DOI: 10.1002/(SICI)1097-0282(19970415)41:5<569::AID-BIP8>3.0.CO;2-K


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<term>Antigenic mimicry</term>
<term>Aqueous solution</term>
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<term>Best structures</term>
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<term>Bpal</term>
<term>Calibrant distances</term>
<term>Carver</term>
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<term>Chemical shift temperature</term>
<term>Chemical shifts</term>
<term>Conformation</term>
<term>Conformational</term>
<term>Conformational families</term>
<term>Conformational investigation</term>
<term>Conformational variability</term>
<term>Connectivity</term>
<term>Data points</term>
<term>Diana calculations</term>
<term>Distance restraints</term>
<term>Energy energy range</term>
<term>Energy minimization</term>
<term>Felix software</term>
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<term>John wiley sons</term>
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<term>Lower temperatures</term>
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<term>Minimization</term>
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<term>Same topology</term>
<term>Second half</term>
<term>Separate sets</term>
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<term>Side chains</term>
<term>Stable helix</term>
<term>Structural basis</term>
<term>Structural characterization</term>
<term>Structural families</term>
<term>Sweep width</term>
<term>Tocsy spectra</term>
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<term>Antigenic</term>
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<term>Arginine residues</term>
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<term>Best structures</term>
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<term>Bpal</term>
<term>Calibrant distances</term>
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<term>Chemical shift</term>
<term>Chemical shift temperature</term>
<term>Chemical shifts</term>
<term>Conformation</term>
<term>Conformational</term>
<term>Conformational families</term>
<term>Conformational investigation</term>
<term>Conformational variability</term>
<term>Connectivity</term>
<term>Data points</term>
<term>Diana calculations</term>
<term>Distance restraints</term>
<term>Energy energy range</term>
<term>Energy minimization</term>
<term>Felix software</term>
<term>Fmdv</term>
<term>Global backbone rmsd</term>
<term>Global rmsd</term>
<term>Guanidinium group</term>
<term>Helical</term>
<term>Helical arrangement</term>
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<term>Helical structure</term>
<term>Helical tendency</term>
<term>Helix</term>
<term>Hydrogen bond</term>
<term>Hydrogen bonds</term>
<term>Jnha values</term>
<term>John wiley sons</term>
<term>Linear conformations</term>
<term>Linear structures</term>
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<term>Lower temperatures</term>
<term>Magn</term>
<term>Minimization</term>
<term>Mirror images</term>
<term>Modeling</term>
<term>Molecular modeling</term>
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<term>Noesy data</term>
<term>Noesy spectra</term>
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<term>Rowlands</term>
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<term>Stable helix</term>
<term>Structural basis</term>
<term>Structural characterization</term>
<term>Structural families</term>
<term>Sweep width</term>
<term>Tocsy spectra</term>
<term>Torsion</term>
<term>Torsion angles</term>
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<term>Unusual behavior</term>
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<front>
<div type="abstract">Antibodies induced against intact foot‐and‐mouth disease Virus (FMDV) particles bind to the retro‐inverso analogue of fragment 141–159 of the viral coat protein VP1 of FMDV, variant A, equally well as to the parent peptide. A conformational investigation of this retro‐inverso peptide was carried out by nmr spectroscopy and restrained molecular modeling in order to identify the structural basis for the antigenic mimicry between these retro‐inverso and parent peptides. In 100% trifluoroethanol a well‐defined left‐handed α‐helical region exists from residue 150 to residue 159, which is consistently present in all conformational families obtained from restrained modelling. A less‐defined left‐handed helical region is present in the tract 144–148, which is also consistent for all structures. Conformational flexibility exists about Gly149, which leads to two types of structures, either bent or linear. In the bent structures, a three‐residue inverse tight turn is found, which can be classified as an inverse γ‐turn centered at Gly149. The overall structural features of the retro‐inverso peptide are shown to be similar to those of the parent L‐peptide. The two molecules, however, are roughly mirror images because they share inherently chiral secondary structure elements. By comparing these conformational conclusions with the x‐ray structure of the Fab complex of a corresponding VP1 antigenic fragment, a rationale is proposed to account for the topological requirements of specific recognition that are implied by the equivalent antigenic activity of the natural and retro‐inverso compounds. © 1997 John Wiley & Sons, Inc. Biopoly 41: 569–590, 1997.</div>
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