Department of Biochemistry, Université libre de Bruxelles, School of Medicine, Waterloo Boulevard 115; B-1000 Brussels, Belgium
Abstract:
The interaction of a calcium-dependent regulator protein (CDR) of brain adenylate cyclase (EC 4.6.1.1) with synaptic membranes from guinea pig brain was examined using 125I-CDR as a tracer molecule. 125I-CDR binding was reversible, saturable, and temperature sensitive. The same Ca2+ and Mg2+ dependence was observed for 125I-CDR binding and for brain adenylate cyclase activation by CDR.