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利福霉素衍生物对人白血病淋巴细胞RNA聚合酶的作用

Action of rifamycin derivatives on RNA polymerase of human leukemic lymphocytes.

作者信息

Tsai M J, Saunders G F

出版信息

Proc Natl Acad Sci U S A. 1973 Jul;70(7):2072-6. doi: 10.1073/pnas.70.7.2072.

Abstract

The mechanism of inhibition of human RNA polymerase by four rifamycin derivatives was investigated. Derivative AF/013 (3-formyl rifamycin SV:O-n-octyloxime) with strong hydrophobic side chains prevents the polymerase from binding to DNA and also affects the size of RNA synthesized. Derivative PR/19 (3'-acetyl-1'-benzyl-2'-methylpyrrolo[3,2-c]-4-desoxy-rifamycin SV) only affects RNA synthesis when RNA polymerase has been previously incubated with the drug or when the reaction was performed at high salt concentration [0.14 M (NH(4))(2)-SO(4)]. Our results suggest that these drugs exert their inhibitory actions by binding to the enzyme instead of DNA.

摘要

研究了四种利福霉素衍生物对人RNA聚合酶的抑制机制。具有强疏水侧链的衍生物AF/013(3-甲酰基利福霉素SV:O-正辛基肟)可阻止聚合酶与DNA结合,并且还会影响合成的RNA的大小。衍生物PR/19(3'-乙酰基-1'-苄基-2'-甲基吡咯并[3,2-c]-4-脱氧-利福霉素SV)仅在RNA聚合酶预先与该药物孵育时或在高盐浓度[0.14 M硫酸铵]下进行反应时才影响RNA合成。我们的结果表明,这些药物通过与酶而非DNA结合来发挥其抑制作用。

相似文献

3
Isolation and characterization of human DNA-dependent RNA polymerase.人源DNA依赖性RNA聚合酶的分离与鉴定
Biochim Biophys Acta. 1974 Sep 27;366(1):61-9. doi: 10.1016/0005-2787(74)90318-9.

本文引用的文献

1
Studies on the binding of RNA polymerase to polynucleotides.RNA聚合酶与多核苷酸结合的研究。
J Mol Biol. 1966 Dec 28;22(2):199-209. doi: 10.1016/0022-2836(66)90126-4.
6
Actions of the rifamycins.利福霉素的作用。
Bacteriol Rev. 1971 Sep;35(3):290-309. doi: 10.1128/br.35.3.290-309.1971.
7
RNA polymerase.RNA聚合酶
Annu Rev Biochem. 1971;40:711-40. doi: 10.1146/annurev.bi.40.070171.003431.
9
Inhibition of DNA-dependent RNA synthesis by rifamycins.利福霉素对依赖DNA的RNA合成的抑制作用。
J Antibiot (Tokyo). 1968 Mar;21(3):234-6. doi: 10.7164/antibiotics.21.234.
10
Mode of action of rafamycin on the RNA polymerase reaction.雷法霉素对RNA聚合酶反应的作用模式。
Biochim Biophys Acta. 1968 Mar 18;157(1):218-9. doi: 10.1016/0005-2787(68)90286-4.

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