Suppr超能文献

白喉毒素作用机制的研究。IV. 无细胞体系中毒素作用对辅因子(NAD)需求的特异性。

Studies on the mode of action of diphtheria toxin. IV. Specificity of the cofactor (NAD) requirement for toxin action in cell-free systems.

作者信息

Goor R S, Pappenheimer A M

出版信息

J Exp Med. 1967 Nov 1;126(5):913-21. doi: 10.1084/jem.126.5.913.

Abstract

The ability of a number of nucleotides related to NAD to replace NAD as cofactors for inhibition by diphtheria toxin of peptide bond formation has been examined. Neither NADH nor NADP are active. Of some 14 analogues closely related structurally to NAD that have been tested, only 3-thiocarboxamide pyridine-AD is as active as NAD itself. Replacement of the 3-carboxamide group on the pyridine ring by an acetyl group, or deamination of the purine ring, resulted in derivatives with reduced activity. The results were interpreted as suggesting that NAD and certain related nucleotides are capable of specific interaction with diphtheria toxin. Using the method of equilibrium dialysis, reversible binding of 1 mole of NAD per mole of toxin has been demonstrated. Toxoid does not interact with NAD.

摘要

已对一些与烟酰胺腺嘌呤二核苷酸(NAD)相关的核苷酸作为辅因子替代NAD以抑制白喉毒素对肽键形成的能力进行了研究。烟酰胺腺嘌呤二核苷酸磷酸(NADH)和烟酰胺腺嘌呤二核苷酸磷酸(NADP)均无活性。在已测试的约14种结构上与NAD密切相关的类似物中,只有3-硫代甲酰胺吡啶-AD与NAD本身活性相同。吡啶环上的3-甲酰胺基团被乙酰基取代,或嘌呤环脱氨基,会产生活性降低的衍生物。这些结果被解释为表明NAD和某些相关核苷酸能够与白喉毒素发生特异性相互作用。使用平衡透析法,已证明每摩尔毒素可与1摩尔NAD发生可逆结合。类毒素不与NAD相互作用。

相似文献

10
Studies on transferase II using diphtheria toxin.使用白喉毒素对转移酶II的研究。
Cold Spring Harb Symp Quant Biol. 1969;34:595-602. doi: 10.1101/sqb.1969.034.01.068.

引用本文的文献

1
Bacterial toxins: cellular mechanisms of action.细菌毒素:细胞作用机制
Microbiol Rev. 1984 Sep;48(3):199-221. doi: 10.1128/mr.48.3.199-221.1984.
10
Diphtheria toxin: mode of action and structure.白喉毒素:作用方式与结构
Bacteriol Rev. 1975 Mar;39(1):54-85. doi: 10.1128/br.39.1.54-85.1975.

本文引用的文献

3
Measurement of protein-binding phenomena by gel filtration.通过凝胶过滤法测定蛋白质结合现象。
Biochim Biophys Acta. 1962 Oct 8;63:530-2. doi: 10.1016/0006-3002(62)90124-5.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验