Genetically engineered G-alpha proteins and uses thereof
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United States of America Patent
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Oct 1, 2013
Grant Date -
Sep 1, 2011
app pub date -
Aug 28, 2009
filing date -
Aug 29, 2008
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Abstract
The present invention relates to novel engineered Ga proteins and assay methods of using such proteins to advance drug discovery. Engineered Ga proteins described by the invention contain alterations of at least one and preferably two or more amino acid residues that are highly conserved among all four subfamilies of Ga proteins. A preferred engineered protein disclosed here is a double mutant, Gαπ R178M A326S. This specific combination of mutations yields an unexpectedly amplified effect on Ga function both in terms of GTPase activity (GTP hydrolysis) and GDP dissociation. This synergistic effect may have a profound influence on the way GPCR signaling pathways are examined for the development of new pharmacotherapies, particularly in the field of central nervous system disorders such as Parkinson's disease.
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