Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-29 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan; Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo, Chiba 271-8510, Japan.
FEBS Lett. 2013 Oct 11;587(20):3354-9. doi: 10.1016/j.febslet.2013.08.031. Epub 2013 Sep 10.
The phycobilisome (PBS) is a photosynthetic light-harvesting complex in red algae, whose structural genes are separately encoded by both the nuclear and chloroplast genomes. While the expression of PBS genes in both genomes is responsive to environmental changes to modulate light-harvesting efficiency, little is known about how gene expression of the two genomes is coordinated. In this study, we focused on the four nuclear-encoded chloroplast sigma factors to understand aspects of this coordination, and found that SIG2 directs the expression of chloroplast PBS genes in the red alga Cyanidioschyzon merolae.
藻胆体（PBS）是红藻中的一种光合光捕获复合物，其结构基因分别由核基因组和叶绿体基因组单独编码。虽然两个基因组中 PBS 基因的表达都对环境变化有响应，以调节光捕获效率，但对于两个基因组中基因表达的协调方式知之甚少。在这项研究中，我们专注于四个核编码的叶绿体 σ 因子，以了解这种协调的某些方面，发现 SIG2 指导红藻 Cyanidioschyzon merolae 中叶绿体 PBS 基因的表达。
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