Author:
Rymerson Robert T.,Carroll Kenneth K.,Rip Jack W.
Abstract
Dolichol kinase activity in microsomes from etiolated rye seedlings had a pH optimum at 8 with a shoulder at pH 6.5. Triton X-100 (0.4%) was required for optimum activity. Exogenous divalent cations did not enhance activity, although Mg+2 was added routinely. Rye microsomes were found to contain dolichol and polyprenol in a ratio of 3 to 2. Rye, soybean embryo, and rat liver microsomes catalyzed the synthesis of 78, 52, and 516 nmol [14C]dolichyl phosphate/(mg microsomal protein∙h) compared with 21, 22, and 49 nmol [3H]polyprenyl phosphate/(mg microsomal protein∙h), respectively. It is clear that microsomes from plant systems can catalyze the phosphorylation of polyprenol better than rat liver when compared with their abilities to catalyze the phosphorylation of dolichol. It is not known whether one or more kinases is responsible for catalyzing the phosphorylation of these two closely related groups of compounds.Key words: dolichol, polyprenol, dolichyl phosphate, polyprenyl phosphate, kinases.
Publisher
Canadian Science Publishing
Subject
Cell Biology,Molecular Biology,Biochemistry
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献