Molecular biology of light-responsive genes in cyanobacteria

光养生物直接或间接地对各种光环境做出反应，以达到优化光合作用的目的。然而，光驯化的分子机制尚未被详细阐明。我们利用可转化蓝藻聚球藻PCC6803对光响应机制进行了分子分析。我们在本研究中鉴定的基因有slr2031(丝氨酸/苏氨酸蛋白磷酸酶)、spkA(丝氨酸/苏氨酸蛋白激酶)、spkB(丝氨酸/苏氨酸蛋白激酶)、pisJ1操纵子(光敏色素样光受体和信号转导途径基因)。我们还利用DNA微阵列对高光响应基因进行了分析。通过我们的工作，给出了蓝藻对光环境响应的分子机制的整体轮廓。

Phototrophic organisms respond to various light environments for the purpose of optimization of photosynthesis directly or indirectly. However, the molecular mechanism of light acclimation has not yet been elucidated in detail. We took advantage of transformable cyanobacterium Synechocystis sp.PCC 6803 for molecular analysis of light-responsive mechanism. Genes we have identified in this study are slr2031 (putative Ser/Thr protein phosphatase), spkA (Ser/Thr protein kinase), spkB (Ser/Thr protein kinase), pisJl operon (phytochrome-like photoreceptor and signal transduction pathway genes). We also analyzed high light-responsive genes by using DNA microarray. Through our works, outline of the whole image was given for molecular mechanism with which cyanobacteria respond to light environments.