title: Soluble adenylate cyclase activity in Neurospora crassa.
abstract: A soluble form of adenylate cyclase was extracted from mycelia of Neurospora crassa wild-type strains. This enzyme activity was purified by chromatography on hexyl-amino-Sepharose, agarose and Blue Sepharose and preparative polyacrylamide-gel electrophoresis. On sodium dodecyl sulphate/polyacrylamide-gel electrophoresis, peak fractions from the later purification steps showed a main polypeptide band with an apparent molecular weight of about 66 000. The following hydrodynamic and molecular parameters were established for the Neurospora soluble adenylate cyclase activity: sedimentation coefficient, 6.25 S; Stokes radius, 7.3 nm; partial specific volume, 0.74 ml/g; molecular weight, 202 000; frictional ratio, 1.65. The isoelectric point of this enzyme activity was 4.65. The enzyme was not activated by GTP, [beta gamma-imido]GTP, fluoride or cholera toxin.
mesh_terms: D000262:Adenylyl Cyclases / Q000302:isolation & purification / Q000378:metabolism*; D002499:Centrifugation, Density Gradient; D002846:Chromatography, Affinity; D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D007700:Kinetics; D009491:Neurospora / Q000201:enzymology*; D009492:Neurospora crassa / Q000201:enzymology*; D012995:Solubility
chemical_list: D000262:Adenylyl Cyclases