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          Institute: MPI für Biochemie     Collection: Independent Research Groups     Display Documents



ID: 39334.0, MPI für Biochemie / Independent Research Groups
Conformational and molecular modeling studies of sulfated cholecystokinin-15
Authors:Giragossian, C.; Stone, S.; Papini, A. M.; Moroder, L.; Mierke, D. F.
Language:English
Date of Publication (YYYY-MM-DD):2002-05-10
Title of Journal:Biochemical and Biophysical Research Communications
Journal Abbrev.:Biochem. Biophys. Res. Commun.
Volume:293
Issue / Number:3
Start Page:1053
End Page:1059
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Conformational features of the C-terminal carboxyamidated pentadecapeptide of CCK ((SHRISDRD)-H-19[SO4]-YMGWMDF(33)-NH2) were determined by NMR spectroscopy in a zwitterionic membrane- mimetic solvent system, composed of DPC micelles. The C- terminal octapeptide consisted of a well-defined pseudohelix that was nearly identical to the structure previously reported for nonsulfated CCK-8 in the same solvent system. N-terminal amino acids of CCK-15 were highly disordered, with no clear conformational preference. Extensive NOE-restrained molecular dynamics simulations of the CCK-15/CCK1-R complex suggested that almost all the experimentally determined intermolecular contact points provided by NMR, site-directed mutagenesis, and photo-affinity labeling could be simultaneously satisfied, when the N-terminus of the ligand is placed in close spatial proximity to the N-terminus of the receptor. (C) 2002 Elsevier Science (USA). All rights reserved.
Free Keywords:cholecystokinin; CCK; CCK-15; G-protein coupled receptor; NMR solution structure
Comment of the Author/Creator:Date: 2002, MAY 10
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Biochemie/Independent Research Groups/Bioorganic Chemistry (L. Moroder)
External Affiliations:Brown Univ, Dept Chem, Div Biol & Med, Providence, RI 02912 USA; Brown Univ, Dept Chem, Div Biol & Med, Providence, RI 02912 USA; Univ Cape Town, Dept Chem, ZA-7701 Rondebosch, South Africa; Univ Florence, Dept Organ Chem Ugo Schiff, I-50121 Florence, Italy; Brown Univ, Dept Mol Pharmacol, Div Biol & Med, Providence, RI 02912 USA
Identifiers:ISI:000175640800026 [ID No:1]
ISSN:0006-291X [ID No:2]
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