眼虫叶绿体氨酰-tRNA合成酶的转录和翻译位点。
The sites of transcription and translation for Euglena chloroplastic aminoacyl-tRNA synthetases.
作者信息
Hecker L I, Egan J, Reynolds R J, Nix C E, Schiff J A, Barnett W E
出版信息
Proc Natl Acad Sci U S A. 1974 May;71(5):1910-4. doi: 10.1073/pnas.71.5.1910.
Abstract
We find that cycloheximide completely blocks the light-induced apearance of Euglena chloroplastic aminoacyl-tRNA synthetases in dark-grown cells of Euglena gracilis var. bacillaris. Streptomycin, on the other hand, has no effect on the light-induction of these organellar enzymes. These observations, together with the finding that an aplastidic mutant (strain W(3)BUL, which has neither significant plastid structure nor detectable chloroplast DNA) contains low levels of the chloroplastic synthetases, indicate that the chloroplastic synthetases are transcriptional products of nuclear genes and are translated on cytoplasmic ribosomes prior to compartmentalization within the chloroplasts.
摘要
我们发现，放线菌酮完全阻断了纤细裸藻变种巴氏裸藻黑暗培养细胞中光诱导的叶绿体氨酰 - tRNA合成酶的出现。另一方面，链霉素对这些细胞器酶的光诱导没有影响。这些观察结果，连同无质体突变体（W(3)BUL菌株，既没有明显的质体结构，也没有可检测到的叶绿体DNA）含有低水平叶绿体合成酶这一发现，表明叶绿体合成酶是核基因的转录产物，并且在被分隔到叶绿体内之前在细胞质核糖体上进行翻译。
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