title: Identification of a calcium-binding protein as a calcium-dependent regulator of brain adenylate cyclase.
abstract: An activating factor of adenylate cyclase (EC 4.6.1.1) HAS BEEN OBTAINED FROM DETERGENT-DISPERSED PREPARATIONS OF PORCINE CEREBRAL CORTEX BY COLUMN CHROMATOGRAPHY ON ECTEOLA-cellulose. The factor was identified by acrylamide gel electrophoresis and by enzyme activation studies as the Ca2+-binding protein that regulates the activity of a brain cyclic nucleotide phosphodiesterase. This Ca2+-binding protein confers a Ca2+-dependent activation upon the adenylate cyclase, which is reversed by the subsequent addition of egta in excess of the free Ca2+. It is proposed that this Ca2+-dependent regulator controls enzymatic activities responsible for the synthesis of adenosine 3':5'-monophosphate and for the hydrolysis of guanosine 3':5'-monophosphate.
mesh_terms: D000262:Adenylyl Cyclases / Q000378:metabolism*; D000818:Animals; D001921:Brain / Q000201:enzymology*; D002118:Calcium / Q000378:metabolism / Q000494:pharmacology*; D002540:Cerebral Cortex / Q000032:analysis; D000242:Cyclic AMP / Q000096:biosynthesis; D006152:Cyclic GMP / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004789:Enzyme Activation / Q000187:drug effects; D005026:Ethylene Glycols / Q000494:pharmacology; D009419:Nerve Tissue Proteins / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D010727:Phosphoric Diester Hydrolases / Q000378:metabolism; D011485:Protein Binding; D013552:Swine
chemical_list: D005026:Ethylene Glycols; D009419:Nerve Tissue Proteins; D000242:Cyclic AMP; D010727:Phosphoric Diester Hydrolases; D000262:Adenylyl Cyclases; D006152:Cyclic GMP; D002118:Calcium