ATP COUPLED ARSENICAL PUMP OF E COLI
ATP COUPLED ARSENICAL PUMP OF E COLI
批准号:
6258843
负责人:
ROBERT A MITCHELL
金额:
$0.01万
依托单位国家:
美国
项目类别:
财政年份:
1997
资助国家:
美国
项目状态:
已结题
起止时间:
1997-06-01 至 1999-11-30
中文摘要
我们正在研究ArsA ATP酶催化ATP的水解,
看看它是否能催化磷酸盐-水的氧气交换
线粒体F1 ATP酶活性。 对后者的研究提供了
关于ATP水解与
能量耦合和位点-位点相互作用(P. Boyer结合
改变机制)。 在高浓度的
我们现在用低水平的ATP来检测
由单一站点周转产生。 这是可能的,因为
获得更大量的纯化ArsA蛋白。
英文摘要
We are studying the hydrolysis of ATP catalyzed by ArsA ATPase to
see if it catalyses an phosphate-water oxygen exchange analogous to
that of mitochonrial F1 ATPase. Studies on the latter have provided
important information on the relation between ATP hydrolysis and
energy coupling and on site-site interactions (P. Boyer's binding
change mechanism). No exchange was detected at high concentrations of
ATP and we are now using low levels of ATP to try to examine ATP
produced by single site turnover. This is now possible because of the
availability of larger amounts of purified ArsA protein.
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