Protein enhancement of hammerhead ribozyme catalysis.

Protein enhancement of hammerhead ribozyme catalysis.
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锤头核酶催化的蛋白质增强。

DOI:
10.1126/science.7692597
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发表时间:
1993
期刊:
影响因子:
56.9
通讯作者:
D. Herschlag
D. Herschlag
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Z. Tsuchihashi;M. Khosla;D. Herschlag

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当核酶的识别序列延伸超过一定长度时,周转减慢,特异性降低。在这里,它表明,蛋白质可以帮助核酶克服这些一般限制核酶活性。通过锤头状核酶对RNA寡核苷酸的切割在加入衍生自人免疫缺陷病毒1型的p7核衣壳(NC)蛋白的蛋白后增强10- 20倍。NC蛋白还增强核酶区分具有不同序列的RNA寡核苷酸的切割的能力。这些催化改进可归因于该RNA结合蛋白的链交换活性。可以想象,内源性或添加的蛋白质可以提供体内核酶活性和特异性的类似增加。
When the recognition sequence of a ribozyme is extended beyond a certain length, turnover is slowed and specificity is decreased. Here, it is shown that a protein can help a ribozyme overcome these general limitations on ribozyme activity. Cleavage of an RNA oligonucleotide by a hammerhead ribozyme is enhanced 10- to 20-fold upon addition of a protein derived from the p7 nucleocapsid (NC) protein of human immunodeficiency virus-type 1. The NC protein also enhances the ability of the ribozyme to discriminate between cleavage of RNA oligonucleotides with differing sequences. These catalytic improvements can be attributed to the strand exchange activity of this RNA binding protein. It is conceivable that endogenous or added proteins may provide analogous increases in ribozyme activity and specificity in vivo.
核糖核酸酶 P(一种核糖核蛋白酶)的蛋白质部分的作用。
DOI: 10.1126/science.3122322
发表时间: 1988
期刊: Science (New York, N.Y.)
影响因子: --
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