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A combined NMR and molecular dynamics simulation study to determine the conformational properties of agonists and antagonists against experimental autoimmune encephalomyelitis

Mantzourani, Efthymia D., Blokar, Klemen, Tselios, Theodore V., Matsoukas, John M., Platts, James A., Mavromoustakos, Thomas M. and Grdadolnik, Simona Golic 2008. A combined NMR and molecular dynamics simulation study to determine the conformational properties of agonists and antagonists against experimental autoimmune encephalomyelitis. Bioorganic & Medicinal Chemistry 16 (5) , pp. 2171-2182. 10.1016/j.bmc.2007.11.083

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Abstract

Myelin basic protein (MBP) is one of the best characterized autoantigens causing multiple sclerosis (MS), via a procedure that involves a stable formation of the trimolecular complex of a T-cell Receptor (TCR), an MBP epitope, and the receptor HLA-DR2b. Experimental autoimmune encephalomyelitis (EAE) is considered as an instructive model for MS in humans, and plenty of X-ray data is available for a number of EAE inducing peptide-receptor complexes. To date, though, there are no data available for complexes involving peptides reversing EAE, namely antagonists. Conformational properties of the EAE inducing epitope MBP87–99 were analyzed in DMSO using the NOE connectivities and vicinal HN–Hα coupling constants, and compared with the antagonist altered peptide ligands. A robust method, which is based on a combination of molecular dynamics and energy minimization, is proposed for identifying the putative bioactive conformations. Generated conformations are compared with the known X-ray structure of MBP83–96 (human sequence numbering) in the HLA-DR2b complex. The structural motif for the agonist–antagonist activity is discussed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Pharmacy
Subjects: R Medicine > RM Therapeutics. Pharmacology
R Medicine > RS Pharmacy and materia medica
Uncontrolled Keywords: NMR; Molecular dynamics; Bioactive conformation; Agonist–antagonist activity
Publisher: Elsevier
ISSN: 0968-0896
Last Modified: 04 Jun 2017 03:12
URI: http://orca-mwe.cf.ac.uk/id/eprint/18092

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