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大肠杆菌RNA聚合酶的模板特异性抑制剂。

Template specific inhibitors of E. coli RNA polymerase.

作者信息

Chou H J, Froehlich J P, Pitha J

出版信息

Nucleic Acids Res. 1978 Mar;5(3):691-6. doi: 10.1093/nar/5.3.691.

Abstract

Electroneutral analogs of polynucleotides, poly-9-vinyladenine and poly-1-vinyluracil inhibit E. coli RNA polymerase in all combinations where the single stranded polynucleotides are used as templates and the vinyl analogs are complementary to them. As templates both the ribo- and deoxyribopolynucleotides were tested; variation of the template concentration in the presence of vinyl analogs produced a competitive pattern of inhibition. The electroneutral analogs do not inhibit the enzyme activity when non-complementary single stranded polynucleotides or double stranded polynucleotides are used as templates; the latter fully supports transcription even when one of the strands is complementary to the analog.

摘要

多核苷酸的电中性类似物,聚-9-乙烯基腺嘌呤和聚-1-乙烯基尿嘧啶,在以单链多核苷酸为模板且乙烯基类似物与之互补的所有组合中,均能抑制大肠杆菌RNA聚合酶。作为模板,对核糖和脱氧核糖多核苷酸都进行了测试;在乙烯基类似物存在的情况下,模板浓度的变化产生了竞争性抑制模式。当使用非互补单链多核苷酸或双链多核苷酸作为模板时,电中性类似物不会抑制酶活性;即使其中一条链与类似物互补,双链多核苷酸仍能充分支持转录。

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