title: A study of the role of the reactive thiol group of rabbit muscle creatine kinase with a chromophoric reporter group.
abstract: Substrate- and ligand-induced conformational changes were studied in a series of thiol-modified derivatives of rabbit muscle creatine kinase that retained different amounts of enzymic activity. The results indicate that the 'reactive' thiol group of the enzyme is required for the conformational changes associated with formation of a 'transition-state analogue' complex.
mesh_terms: D000244:Adenosine Diphosphate / Q000378:metabolism; D000818:Animals; D003402:Creatine Kinase / Q000378:metabolism*; D008024:Ligands; D009132:Muscles / Q000201:enzymology*; D010663:Phenylmercury Compounds; D011487:Protein Conformation; D011817:Rabbits; D013053:Spectrophotometry
chemical_list: D008024:Ligands; D010663:Phenylmercury Compounds; D000244:Adenosine Diphosphate; D003402:Creatine Kinase