The structure and function of phytochrome A: the roles of the entire molecule and of its various parts |
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Authors: | Katsushi Manabe Miki Nakazawa |
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Affiliation: | (1) Biological Materials, Faculty of Science, Yokohama City University, Seto 22-2, Kanazawa-ku, 236 Yokohama, Japan;(2) Kihara Institute for Biological Research, Yokohama City University, Maioka 641-12, Totsuka-ku, 244 Yokohama, Japan |
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Abstract: | Phytochrome A is readily cleavable by proteolytic agents to yield an amino-terminal fragment of 66 kilodalton (kDa), which consists of residues 1 to approximately 600, and a dimer of the carboxy-terminal 55-kDa fragment, from residue 600 or so to the carboxyl terminus. The former domain, carrying the tetrapyrrole chromophore, has been studied extensively because of its photoactivity, while less attention has been paid to the non-chromophoric portion until quite recently. However, the evidence gathered to date suggests that this domain is also of great improtance. We present here a review of the structure and the biochemical and physiological functions of the two domains, of parts of these domains, and of the cooperation between them. |
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Keywords: | Carboxy-terminal deletion (phytochrome) Domain structure (phytochrome) Phytochrome Photoconversion Structure and function (phytochrome) Transgenic plants |
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