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首页> 美国卫生研究院文献>Journal of Bacteriology >New cytoplasmic genetic element that controls 20S RNA synthesis during sporulation in yeast.
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New cytoplasmic genetic element that controls 20S RNA synthesis during sporulation in yeast.

机译：新的胞质遗传元件可控制酵母在孢子形成过程中合成20S RNA。

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摘要

Under conditions that induce meiosis and sporulation in Saccharomyces cerevisiae, most strains accumulate a 20S RNA, amounting to as much as 15% of the newly synthesized RNA. The ability of cells to accumulate this new RNA species depends on a dominant genetic element that is cytoplasmically inherited, but is distinct from the other cytoplasmic elements that have been previously identified. The ability to synthesize 20S RNA does not depend on mitochondrial DNA, 2-micron DNA, the translational suppressor psi, the genetic element carrying URE3, or double-stranded killer RNA. However, all 20S- strains examined were also nonkillers, although many nonkiller strains were 20S+. This work also shows that 20S RNA accumulating is not essential for sporulation even though it is induced only by conditions that initiate sporulation. Furthermore, strains that are unable to complete meiosis are still capable of producing 20S RNA when placed under the nitrogen starvation conditions that promote sporulation.
机译：在酿酒酵母中诱导减数分裂和孢子形成的条件下，大多数菌株会积累20S RNA，最多占新合成RNA的15％。细胞积累这种新的RNA种类的能力取决于细胞质遗传的主要遗传元件，但不同于先前已经确定的其他细胞质元件。合成20S RNA的能力不取决于线粒体DNA，2微米DNA，翻译抑制因子psi，携带URE3的遗传元件或双链杀手RNA。但是，尽管许多非杀手菌株均为20S +，但所有检查的20S-菌株也均为非杀手菌株。这项工作还表明，即使仅由引发孢子形成的条件诱导，20S RNA积累对于孢子形成也不是必需的。此外，当放置在促进孢子形成的氮饥饿条件下时，不能完全减数分裂的菌株仍然能够产生20S RNA。

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