The role of ECL2 in CGRP receptor activation:a combined modelling and experimental approach

Woolley, Michael J., Watkins, Harriet A., Taddese, Bruck, Karakullukcu, Z. Gamze, Barwell, James, Smith, Kevin J., Hay, Debbie L., Poyner, David R., Reynolds, Christopher A. and Conner, Alex C. (2013). The role of ECL2 in CGRP receptor activation:a combined modelling and experimental approach. Journal of the Royal Society Interface, 10 (88),

Abstract

The calcitonin gene-related peptide (CGRP) receptor is a complex of a cal-citonin receptor-like receptor (CLR), which is a family B G-protein-coupled receptor (GPCR) and receptor activity modifying protein 1. The role of the second extracellular loop (ECL2) of CLR in binding CGRP and coupling to Gs was investigated using a combination of mutagenesis and modelling. An alanine scan of residues 271-294 of CLR showed that the ability of CGRP to produce cAMP was impaired by point mutations at 13 residues; most of these also impaired the response to adrenomedullin (AM). These data were used to select probable ECL2-modelled conformations that are involved in agonist binding, allowing the identification of the likely contacts between the peptide and receptor. The implications of the most likely structures for receptor activation are discussed. © 2013 The Authors.

Publication DOI: https://doi.org/10.1098/rsif.2013.0589
Divisions: Life & Health Sciences > Pharmacy
Life & Health Sciences > Chronic and Communicable Conditions
Life & Health Sciences
Life & Health Sciences > Cellular and Molecular Biomedicine
Additional Information: © 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses by/3.0/, which permits unrestricted use, provided the original author and source are credited. Funding: Wellcome Trust [091496]; New Zealand Heart Foundation; MRC [G1001812]
Uncontrolled Keywords: calcitonin gene-related peptide,calcitonin receptor-like receptor,class B G-protein-coupled receptor,loop modelling,site-directed mutagenesis,Biophysics,Biotechnology,Bioengineering,Biomedical Engineering,Biomaterials,Biochemistry
Full Text Link: http://rsif.roy ... /10/88/20130589
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2013-11
Authors: Woolley, Michael J.
Watkins, Harriet A.
Taddese, Bruck
Karakullukcu, Z. Gamze
Barwell, James
Smith, Kevin J.
Hay, Debbie L.
Poyner, David R. ( 0000-0003-1590-112X)
Reynolds, Christopher A.
Conner, Alex C.

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License: Creative Commons Attribution


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