Suppr超能文献

鸟苷三磷酸(GTP)的光亲和类似物与微管蛋白的相互作用。

Interactions of a photoaffinity analog of GTP with the proteins of microtubules.

作者信息

Geahlen R L, Haley B E

出版信息

Proc Natl Acad Sci U S A. 1977 Oct;74(10):4375-7. doi: 10.1073/pnas.74.10.4375.

Abstract

Tubulin dimers isolated from brain contain two GTP binding sites, a nonexchangeable site and an exchangeable site. To localize the exchangeable site, we used a photoaffinity analog of GTP, 8-azidoguanosine triphosphate (8-N3GTP), which supports tubulin polymerization in the absence of activating light. Photolysis of tubulin polymerized in the presence of 0.01 to 0.1 mM [beta, gamma-32P]8-N3GTP resulted in covalent incorporation of radioactivity only onto the beta monomer. Photolysis with 8-N3GTP also prevented any further repolymerization of the tubulin whereas like treatment in the presence of GTP had no effect. Preincubation of tubulin with GTP prevented photo-incorporation of [beta, gamma-32P]8-N3GTP whereas preincubation with ATP did not.

摘要

从大脑中分离出的微管蛋白二聚体含有两个GTP结合位点,一个不可交换位点和一个可交换位点。为了定位可交换位点,我们使用了一种GTP的光亲和类似物,8-叠氮鸟苷三磷酸(8-N3GTP),它在没有激活光的情况下支持微管蛋白聚合。在0.01至0.1 mM [β,γ-32P]8-N3GTP存在下聚合的微管蛋白经光解后,放射性仅共价结合到β单体上。用8-N3GTP进行光解也阻止了微管蛋白的任何进一步再聚合,而在GTP存在下进行类似处理则没有效果。微管蛋白与GTP预孵育可防止[β,γ-32P]8-N3GTP的光掺入,而与ATP预孵育则没有此作用。

相似文献

3
Localization of the ATP binding site on alpha-tubulin.α-微管蛋白上ATP结合位点的定位
Arch Biochem Biophys. 1983 Sep;225(2):475-81. doi: 10.1016/0003-9861(83)90056-5.
4
Aberrant guanosine triphosphate-beta-tubulin interaction in Alzheimer's disease.
Ann Neurol. 1989 Aug;26(2):210-5. doi: 10.1002/ana.410260205.
10
Direct photoaffinity labeling of tubulin with guanosine 5'-triphosphate.
Biochemistry. 1985 Mar 12;24(6):1555-60. doi: 10.1021/bi00327a040.

本文引用的文献

2
SYNTHESIS OF NUCLEOTIDE ANHYDRIDES BY ANION EXCHANGE.通过阴离子交换合成核苷酸酐。
Biochim Biophys Acta. 1964 Sep 11;91:1-13. doi: 10.1016/0926-6550(64)90164-1.
4
Are cytoplasmic microtubules heteropolymers?细胞质微管是异源聚合物吗?
Proc Natl Acad Sci U S A. 1971 Aug;68(8):1762-6. doi: 10.1073/pnas.68.8.1762.
5
Microtubule assembly in the absence of added nucleotides.在未添加核苷酸的情况下微管装配。
Proc Natl Acad Sci U S A. 1973 Mar;70(3):765-8. doi: 10.1073/pnas.70.3.765.
8
Tublin: nucleotide binding and enzymic activity.微管蛋白:核苷酸结合与酶活性。
J Mol Biol. 1974 Nov 5;89(3):455-68. doi: 10.1016/0022-2836(74)90475-6.

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