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猫和大鼠神经节乙酰胆碱酯酶与非特异性胆碱酯酶之间的相互关系。

Interrelationships between ganglionic acetylcholinesterase and nonspecific cholinesterase of the cat and rat.

作者信息

Koelle G B, Rickard K K, Ruch G A

出版信息

Proc Natl Acad Sci U S A. 1979 Nov;76(11):6012-6. doi: 10.1073/pnas.76.11.6012.

Abstract

When homogenates of cat or rat superior cervical ganglia in Krebs-Ringer solution were incubated at 37 degrees C, the ensuing decrease in acetylcholinesterase (acetylcholine acylhydrolase, EC 3.1.1.7) activity was increased significantly by prior administration in vivo of tetramonoisopropylpyrophosphotetramide at doses that produced selective alkylphosphorylation of butyrylcholinesterase or propionylcholinesterase. These findings are consistent with the proposal that the latter enzymes are posttranscriptional precursors of acetylcholinesterase. Results of similar studies with homogenates of ganglia in water or in M NaCl/1% Triton X-100 were inconclusive, as were those of heat-inactivation studies and immunoprecipitation of the enzymes.

摘要

当将猫或大鼠颈上神经节在 Krebs-Ringer 溶液中的匀浆在 37℃孵育时,体内预先给予能使丁酰胆碱酯酶或丙酰胆碱酯酶发生选择性烷基磷酸化的剂量的四单异丙基焦磷四酰胺,会使随后乙酰胆碱酯酶(乙酰胆碱酰基水解酶,EC 3.1.1.7)活性的降低显著增加。这些发现与后一种酶是乙酰胆碱酯酶转录后前体的提议一致。在水中或 0.15M NaCl/1% Triton X-100 中对神经节匀浆进行的类似研究结果尚无定论,热灭活研究和酶的免疫沉淀结果也是如此。

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