氧气对荚膜红细菌光合作用基因表达中翻译及翻译后步骤的影响。
Effect of oxygen on translation and posttranslational steps in expression of photosynthesis genes in Rhodobacter capsulatus.
作者信息
Hebermehl M, Klug G
机构信息
Institut für Mikrobiologie und Molekularbiologie, D-35392 Giessen, Germany.
出版信息
J Bacteriol. 1998 Aug;180(15):3983-7. doi: 10.1128/JB.180.15.3983-3987.1998.
Abstract
The formation of the photosynthetic apparatus in Rhodobacter capsulatus is regulated by oxygen tension. Previous studies have shown a regulatory effect of oxygen on the transcription of photosynthesis genes and on the stability of certain mRNA segments. Here we show that oxygen affects puf and puc gene expression posttranslationally and that this regulation depends on the presence of bacteriochlorophyll. Our data suggest that this posttranslational effect of oxygen on puf and puc expression is due to the primary effect of oxygen on bacteriochlorophyll synthesis or assembly of pigment protein complexes. Oxygen does not affect the rates of translation of puf-encoded proteins.
摘要
荚膜红细菌光合装置的形成受氧张力调节。先前的研究表明，氧对光合作用基因的转录以及某些mRNA片段的稳定性具有调节作用。在此我们表明，氧在翻译后影响puf和puc基因的表达，且这种调节依赖于细菌叶绿素的存在。我们的数据表明，氧对puf和puc表达的这种翻译后效应是由于氧对细菌叶绿素合成或色素蛋白复合体组装的主要作用。氧不影响puf编码蛋白的翻译速率。
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