SPE1 AND SPE2 - 2 ESSENTIAL GENES IN THE BIOSYNTHESIS OF POLYAMINES THAT MODULATE +1-RIBOSOMAL FRAMESHIFTING IN SACCHAROMYCES-CEREVISIAE

被引：38

作者：

BALASUNDARAM, D

DINMAN, JD

TABOR, CW

TABOR, H

机构：

来源：

JOURNAL OF BACTERIOLOGY | 1994年 / 176卷 / 22期

关键词：

D O I：

10.1128/JB.176.22.7126-7128.1994

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

We previously showed that a mutant of Saccharomyces cerevisiae, which cannot make spermidine as a result of a deletion in the SPE2 gene (spe2 Delta), exhibits a marked elevation in +1 ribosomal frameshifting efficiency in response to the Ty1 frameshift sequence, CUU AGG C. In the present study, we found that spermidine deprivation alone does not result in increased +1 ribosomal frameshifting efficiency. The high level of +1 ribosomal frameshifting efficiency in spe2 Delta cells is the result of the combined effects of both spermidine deprivation and the large increase in the level of intracellular putrescine resulting from the derepression of the gene for ornithine decarboxylase (SPE1) in spermidine deficient strains.

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页码：7126 / 7128

页数：3

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