G protein-coupled receptor fusion proteins in drug discovery

Milligan, G., Feng, G.J., Ward, R.J., Sartania, N. , Ramsay, D., McLean, A.J. and Carrillo, J.J. (2004) G protein-coupled receptor fusion proteins in drug discovery. Current Pharmaceutical Design, 10(17), pp. 1989-2001. (doi: 10.2174/1381612043384295) (PMID:15279540)

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Publisher's URL: http://dx.doi.org/10.2174/1381612043384295


A wide range of peptides and polypeptides can be appended to either the N- or C-terminus of G proteincoupled receptors without disrupting substantially ligand binding and signal transduction. Following fusion of fluorescent proteins, reporter gene constructs or G protein α subunits to the C-terminal tail of a receptor high content and G protein activation assays can be employed to identify agonist ligands. Further modification of the receptor fusions to introduce enhanced levels of constitutive activity and to physically destabilise the protein allows antagonist / inverse agonists screens to be developed in parallel. Equivalent C-terminal addition of pairs of complementary, non-functional, polypeptide fragments allows the application of enzyme complementation techniques. Introduction of N-terminal tags to receptors has also allowed the introduction of novel assay techniques based on a pH-sensitive cyanine dye. These have the capacity to overcome certain limitations of GPCR-fluorescent protein fusions.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Milligan, Professor Graeme and Sartania, Dr Nana
Authors: Milligan, G., Feng, G.J., Ward, R.J., Sartania, N., Ramsay, D., McLean, A.J., and Carrillo, J.J.
College/School:College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
Journal Name:Current Pharmaceutical Design
Publisher:Bentham Science Publishers
ISSN (Online):1873-4286
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
325011Post transitional modification and the function of regulator of G protien signallingGraeme MilliganBiotechnology and Biological Sciences Research Council (BBSRC)C17789Institute of Neuroscience and Psychology