title: The stimulation of coupling factor 1 ATPase by tentoxin.
abstract: Tentoxin at 10--1000 micrometer causes a marked species-selective stimulation of coupling factor 1 Ca2+-dependent ATPase activity (Ka 6.3 . 10(3) M-1). This effect decreases the Km for ATP to about 0.3 mM and increases V 2.75-fold. Above 1.6 micrometer tentoxin the rate of coupled electron transport was reduced to basal without uncoupling.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D004789:Enzyme Activation; D007700:Kinetics; D009183:Mycotoxins / Q000494:pharmacology*; D010456:Peptides, Cyclic / Q000494:pharmacology*; D010944:Plants / Q000201:enzymology; D006180:Proton-Translocating ATPases / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D009183:Mycotoxins; D010456:Peptides, Cyclic; D000251:Adenosine Triphosphatases; D006180:Proton-Translocating ATPases; C003384:tentoxin