Genetic evidence for a silent SUC gene in yeast.

Genetic evidence for a silent SUC gene in yeast.
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酵母中沉默 SUC 基因的遗传证据。

DOI:
10.1093/genetics/98.1.41
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发表时间:
1981
期刊:
影响因子:
3.3
通讯作者:
Botstein,D
Botstein,D
中科院分区:
生物学2区
文献类型:
--
作者:
Carlson,M;Osmond,BC;Botstein,D

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Saccharomyces的ucgenes (SUC1-SUC7)是分散在酵母基因组中的一个基因家族。ASUC+等位基因在任何位点上都具有产生转化酶的能力,从而能够发酵蔗糖。大多数酵母菌株不携带任何可能的suc +等位基因。我们研究了自然存在的阴性(su0)等位基因,目的是区分su0等位基因结构的两种可能模型:(1)su0等位基因对应于简单的缺乏su0遗传信息;(2) su0等位基因是“沉默的”su0基因,它们要么产生缺陷产物,要么不表达。为了便于这些研究,我们构建了具有同源toS的蔗糖非发酵菌株。但在uc2位点携带菌株FL100 (Lacroute 1968)自然存在的负等位基因suc20。利用这些菌株研究了FL100的su20等位基因和S288C的su10、su30等su0等位基因的遗传特性。结果表明,在重组实验中,uc20等位基因恢复到活跃的Suc+状态,并在uc2基因的三个点上提供功能信息;因此,这个基因似乎是一个“沉默”的基因。对S288C中沉默的suc基因(对应于suc2以外的位点)的类似测试未能发现任何其他沉默基因。
TheSUCgenes (SUC1-SUC7) of Saccharomyces are a family of genes that are dispersed in the yeast genome. ASUC+allele at any locus confers the ability to produce the enzyme invertase and, thus, to ferment sucrose. Most yeast strains do not carrySUC+alleles at all possibleSUCloci. We have investigated the naturally occurring negative (suc0) alleles present atSUCloci with the aim of distinguishing between two possible models for the structure ofsuc0alleles: (1)suc0alleles correspond to a simple absence ofSUCgenetic information; (2)suc0alleles are "silent"SUCgenes that either produce a defective product or are not expressed. To facilitate these studies, sucrose-nonfermenting strains were constructed that are congenic toS. cerevisiaestrain S288C (SUC2+), but carry at theSUC2locus the naturally occurring negative allele,suc20, of strain FL100 (Lacroute 1968). These strains were used to study the genetic properties of thesuc20allele of FL100 and thesuc0alleles (suc10, suc30, etc.) of S288C. Thesuc20allele was shown to revert to an active Suc+state and to provide functional information at three points in theSUC2gene in recombination experiments; thissuc20gene thus appears to be a "silent" gene. Similar tests for silentSUCgenes in S288C (corresponding to loci other thanSUC2) failed to reveal any additional silent genes.
DOI: 10.1016/s0021-9258(18)93579-9
发表时间: 1968-04
期刊: The Journal of biological chemistry
影响因子: --
作者:
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发表时间: 1980
期刊: Cell
影响因子: 64.5
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发表时间: 1978
期刊: Cell
影响因子: 64.5
作者:
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发表时间: 1970
影响因子: 10.5
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