Jones A M, Edgerton M D
Department of Biology, University of North Carolina, Chapel Hill 27599-3280.
Semin Cell Biol. 1994 Oct;5(5):295-302. doi: 10.1006/scel.1994.1036.
Red and far-red light control of plant growth and development is mediated by the photoreceptor phytochrome. The way plants utilize red and far-red light is unique in nature, as are the molecular properties of phytochrome, the molecule that provides the mechanistic basis for this type of light perception. Much of what we know about how plants perceive red light has come from research on the structure and function of this photoreceptor. This review discusses the main structural features of phytochrome and some new ideas concerning the relationship between phytochrome structure and function. We propose that phytochrome functions as a dimer and that receptor recognition of phytochrome depends on its gross conformation. We also describe a conserved amino acid repeat within the phytochrome molecule and propose that this repeat is important for dimerization and/or phototransformation.
植物生长和发育的红光及远红光控制是由光受体光敏色素介导的。植物利用红光和远红光的方式在自然界中是独特的，光敏色素的分子特性也是如此，该分子为这种光感知类型提供了机制基础。我们对植物如何感知红光的许多了解都来自于对这种光受体结构和功能的研究。本综述讨论了光敏色素的主要结构特征以及一些关于光敏色素结构与功能关系的新观点。我们提出光敏色素作为二聚体发挥作用，并且光敏色素的受体识别取决于其总体构象。我们还描述了光敏色素分子内一个保守的氨基酸重复序列，并提出该重复序列对二聚化和/或光转化很重要。
