Sequence of a Tobacco (Nicotiana tabacum) Gene Coding for Type A Phytochrome
Sequence of a Tobacco (Nicotiana tabacum) Gene Coding for Type A Phytochrome
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烟草（Nicotiana tabacum）A 型光敏色素基因编码的序列
DOI：
10.1104/pp.101.4.1407
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发表时间：
1993
期刊：
影响因子：
7.4
通讯作者：
F. Nagy
中科院分区：
文献类型：
--
作者：
É. Ádám;Maria Deak;Steve A. Kay;Nam;F. Nagy
光是高等植物生活中最重要的环境刺激之一。光不仅是光合作用的能量来源，也是植物生长发育的环境信号。为了感知不断变化的空间方向，数量和光的质量，高等植物开发了几种光感受器，其中研究和表征最多的是光敏色素。这种独特的植物色蛋白以两种约120 kD的多肽的二聚体形式存在，每种多肽具有共价连接的线性四吡咯发色团（Vierstra et al.，1984年）。光敏色素分子以生理上无活性的Pr形式合成。Pr形式可以通过红光照射（L1，660-670 nm）转化为活性Pfr形式，其可以通过随后的远红光照射（L2，660-670 nm）返回到非活性Pr形式。730 nm）。这种光诱导的相互转换性使光敏色素能够作为控制信号转导链的细胞开关，最终导致不同的分子和生理反应;有关综述，请参见Furuya（1989）。光敏色素
Light is one of the most important environmental stimuli in the life of higher plants. Light is used not only as the source of energy for photosynthesis but also as an environmental signal for plant growth and development. To perceive the ever-changing spatial direction, quantity, and quality of light, higher plants developed several photoreceptors, among which the best studied and characterized is phytochrome. This unique plant chromoprotein exists as a dimer of two polypeptides of approximately 120 kD, each with a covalently attached linear tetrapyrrol chromophore (Vierstra et al., 1984). The phytochrome molecule is synthesized as the physio-logically inactive Pr form. The Pr form can be converted by red illumination (L,,, 660-670 nm) to the active Pfr form, which can be returned to the inactive Pr form by a subsequent far-red illumination (I!,,,, 730 nm). This photo-induced inter-convertibility enables phytochrome to act as a cellular switch that controls signal transduction chains, culminating in different molecular and physiological responses; for a review see Furuya (1989). phytochrome