Suppr超能文献

乙酰辅酶A和辅酶A类似物。它们对大鼠脑胆碱乙酰转移酶的影响。

Acetyl-coenzyme A and coenzyme A analogues. Their effects on rat brain choline acetyltransferase.

作者信息

Rossier J

出版信息

Biochem J. 1977 Aug 1;165(2):321-6. doi: 10.1042/bj1650321.

Abstract

Choline acetyltransferase has the same affinity for acetyl-CoA, propionyl-CoA and butyryl-CoA (Km=1.4 micron). Choline acetyltransferase may use the two latter compounds as substrate, but the longer the acyl chain the lower will be Vmax. CoA is an inhibitor (Ki=1.8 micron). The position of the 3'-phosphate is of primary importance. Desphospho-CoA is a weak inhibitor (Ki=500 micron). 5'-AMP is already an inhibitor (Ki=2500 micron). Phosphopantetheine is not an inhibitor. Dextran Blue is a potent inhibitor (Ki=0.05 micron). Choline acetyltransferase binds to hydrophobic affinity columns. Because of its affinity for nucleotides, affinity for Dextran Blue and hydrophobicity, it is proposed that it contains the 'nucleotide fold', which is a common structural domain present in several enzymes binding nucleotides.

摘要

胆碱乙酰转移酶对乙酰辅酶A、丙酰辅酶A和丁酰辅酶A具有相同的亲和力(米氏常数Km = 1.4微米)。胆碱乙酰转移酶可能将后两种化合物用作底物,但酰基链越长,最大反应速度(Vmax)就越低。辅酶A是一种抑制剂(抑制常数Ki = 1.8微米)。3'-磷酸的位置至关重要。去磷酸辅酶A是一种弱抑制剂(Ki = 500微米)。5'-腺苷酸已经是一种抑制剂(Ki = 2500微米)。磷酸泛酰巯基乙胺不是抑制剂。葡聚糖蓝是一种强效抑制剂(Ki = 0.05微米)。胆碱乙酰转移酶能与疏水亲和柱结合。由于它对核苷酸有亲和力、对葡聚糖蓝有亲和力且具有疏水性,因此有人提出它含有“核苷酸折叠”结构,这是存在于几种结合核苷酸的酶中的一种常见结构域。

相似文献

引用本文的文献

5
Muscarinic receptors and ligands in cancer.癌症中的毒蕈碱受体与配体
Am J Physiol Cell Physiol. 2009 Feb;296(2):C221-32. doi: 10.1152/ajpcell.00514.2008. Epub 2008 Nov 26.
8
Prediction of neutral salt elution profiles for affinity chromatography.亲和色谱中性盐洗脱曲线的预测
Proc Natl Acad Sci U S A. 1981 Apr;78(4):2287-91. doi: 10.1073/pnas.78.4.2287.

本文引用的文献

1
THE SYNTHESIS OF SELENOCOENZYME A.硒辅酶A的合成
J Am Chem Soc. 1965 Jun 20;87:2708-16. doi: 10.1021/ja01090a031.
2
3
Tissue sulfhydryl groups.组织巯基
Arch Biochem Biophys. 1959 May;82(1):70-7. doi: 10.1016/0003-9861(59)90090-6.
10
The enzymic acetylation of choline analogues.胆碱类似物的酶促乙酰化作用。
J Neurochem. 1970 Feb;17(2):171-7. doi: 10.1111/j.1471-4159.1970.tb02198.x.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验