Chen LC, Wu CY, Chen CF, Chiang CF. Purification of chlorpromazine-sensitive GTPase from rat cerebral cortex.
PREPARATIVE BIOCHEMISTRY 1995;
25:183-95. [PMID:
8570568 DOI:
10.1080/10826069508010120]
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Abstract
The chlorpromazine-sensitive GTPase from the cell membrane of rat cerebral cortex was purified to homogenity by using DEAE Bio-Gel A agarose, hydroxyapatite and heparin agarose chromatography. The purified chlorpromazine-sensitive GTPase was purified 370-fold to obtain a final specific activity of 40 mumol GTP hydrolyzed2min/mg protein. The purified enzyme was inhibited by chlorpromazine but not by compound 48/80. Magnesium was required for its activity instead of calcium. The purified enzyme had an apparent pH optimum of 8.0, and molecular weight was estimated to be 58,000.
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