Mutations preventing expression of sup3 tRNASer nonsense suppressors of Schizosaccharomyces pombe

Mutations preventing expression of sup3 tRNASer nonsense suppressors of Schizosaccharomyces pombe
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突变阻止粟酒裂殖酵母sup3 tRNASer无义抑制子的表达

DOI:
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发表时间:
1985
影响因子:
5.3
通讯作者:
D. Söll
D. Söll
中科院分区:
生物学2区
文献类型:
--
作者:
D. Pearson;I. Willis;H. Hottinger;J. Bell;A. Kumar;U. Leupold;D. Söll

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粟酒裂殖酵母中sup3-e tRNASerUGA 或sup3-i tRNASerUAA 对无义密码子的抑制作用因抑制基因座内的突变而减少或消除。通过菌落杂交从粟酒裂殖酵母基因组克隆库中分离出25个抑制失活的sup3-e基因和13个突变体sup3-i基因。这些回复等位基因的序列分析证实了sup3 tRNA基因内突变热点的遗传证据。发现了十五种类型的点突变或插入。其中许多取代了真核 tRNA 基因中高度或完全保守的碱基。酿酒酵母提取物中改变的sup3基因的转录能够识别影响tRNA前体的5'端成熟或剪接速率或两者的突变。总共发现了七个改变转录效率的突变。其中,五个位于内部转录控制区域之外。
Suppression of nonsense codons in Schizosaccharomyces pombe by sup3-e tRNASerUGA or sup3-i tRNASerUAA is reduced or abolished by mutations within the suppressor locus. Twenty-five suppressor-inactive sup3-e genes and thirteen mutant sup3-i genes were isolated from S. pombe genomic clone banks by colony hybridization. Sequence analysis of these revertant alleles corroborates genetic evidence for mutational hotspots within the sup3 tRNA gene. Fifteen types of point mutations or insertions were found. Many of these replace bases which are highly or completely conserved in eucaryotic tRNA genes. Transcription of the altered sup3 genes in a Saccharomyces cerevisiae extract enabled the identification of mutations which affect the rate of 5'-end maturation or splicing of the tRNA precursors or both. A total of seven mutations were found which alter transcriptional efficiencies. Of these, five are located outside the internal transcription control regions.
真核 tRNA 基因的稳定转录复合物形成取决于两个基因内控制区域的有限分离。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Dingermann,T;Sharp,S;Schaack,J;Söll,D
通讯作者: Söll,D
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Schaack,J;Sharp,S;Dingermann,T;Söll,D
通讯作者: Söll,D
一种质粒克隆载体,可以对插入的片段进行正选择。
DOI: 10.1016/0378-1119(80)90022-0
发表时间: 1980
期刊: Gene
影响因子: 3.5
作者:
Roberts,TM;Swanberg,SL;Poteete,A;Riedel,G;Backman,K
通讯作者: Backman,K
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Sharp,S;Dingermann,T;Schaack,J;DeFranco,D;Söll,D
通讯作者: Söll,D
同源 III 类基因在酵母可溶性无细胞提取物中的特异性转录。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Klekamp,MS;Weil,PA
通讯作者: Weil,PA