Alternative Translation and Functional Diversity of Release Factor 2 and Lysyl-tRNA Synthetase

Alternative Translation and Functional Diversity of Release Factor 2 and Lysyl-tRNA Synthetase
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释放因子 2 和赖氨酰-tRNA 合成酶的选择性翻译和功能多样性

DOI:
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发表时间:
1990
期刊:
影响因子:
--
通讯作者:
O. Mikuni
O. Mikuni
中科院分区:
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文献类型:
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作者:
Yoshikazu Nakamura;K. Kawakami;O. Mikuni

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prfB基因编码peptide-chain-release factor 2,其催化细菌中无义密码子UGA和UAA处的翻译终止。prfB突变导致UGA的误读,即,增加移码或抑制。这些翻译错误是由于在UGA效率低下的翻译终止。作为一个极端的情况,prfB中的蛋白石(UGA)突变被自体抑制。prfB基因与herC在同一操纵子中,herC是由复制缺陷型ColEl质粒的抑制突变定义的基因。herC基因与编码赖氨酰-tRNA合成酶的主要种类的基因lysS一致。因此,prfB和lysS在同一操纵子中的遗传组织可能表明这些基因产物的结构、功能和进化相关性。
The prfB gene encodes pep tide-chain-release factor 2 which catalyzes translation termination at nonsense codons UGA and UAA in bacteria. Mutations in prfB cause misreading of UGA, i.e., increased frameshift or suppression. These translational errors were due to inefficient translation termination at UGA. As one extreme case, an opal (UGA) mutation in prfB is autogenously suppressed. The prfB gene is in the same operon with herC, a gene defined by a suppressor mutation of a replication-defective ColEl plasmid. The herC gene coincides with lysS, a gene encoding a major species of lysyl-tRNA synthetase. Thus, the genetic organization of prfB and lysS in the same operon may suggest structural, functional and evolutional relevance of these gene products.
DOI: 10.1073/pnas.82.11.3616
发表时间: 1985-01-01
影响因子: 11.1
作者:
CRAIGEN, WJ;COOK, RG;CASKEY, CT
通讯作者: CASKEY, CT
大肠杆菌色氨酸操纵子基础水平表达的调节。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Roesser,JR;Nakamura,Y;Yanofsky,C
通讯作者: Yanofsky,C