ATP turnover of proteasome

Value 110 ATP/min/26S Range: ±12 ATP/min/26S
Organism Budding yeast Saccharomyces cerevisiae
Reference Henderson A, Erales J, Hoyt MA, Coffino P. Dependence of proteasome processing rate on substrate unfolding. J Biol Chem. 2011 May 20 286(20):17495-502. doi: 10.1074/jbc.M110.212027 abstract and p.17499 left column bottom paragraph & p.17500 table 2 & p.17501 left column bottom paragraphPubMed ID21454622
Method "The ATPase activity reported as number of ATP molecules hydrolyzed per min per doubly-capped 26S proteasome particle...Proteasome ATPase activity was measured in a coupled assay (19, 20) in 25 mM HEPES (pH 7.5), 100 mM KCl, 20 mM MgCl2, 10% glycerol, 250 mU/ml LDH/pyruvate kinase (Sigma), 7.5 mM phospho(enol)pyruvic acid, 1 mM NADH, 2mM DTT, and 5mM ATP."
Comments "ATP turnover was 110/min./proteasome, and was not markedly changed by substrate...The rate of ATP turnover was 110/proteasome/min. and varied modestly among several independently prepared lots."
Entered by Uri M
ID 109936