Evidence for a monooxygenase‐catalyzed primary process in the catabolism of chlorophyll

FEBS Letters

Curty, Christophe¹  Engel, Norbert¹  Gossauer, Albert¹ 

[1] Institut für Organische Chemie der Universität, ch. du Musée 9, Pérolles, CH-1700 Fribourg, Switzerland

关键词: Chlorophyll catabolism;    Monooxygenase;    18O labeling;    Chlorella protothecoides;    19-Formyl-1[21H;    22H]bilinone;   

DOI  :  10.1016/0014-5793(95)00348-D

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Only recently have products of the enzymatic breakdown of the chlorophylls been characterized for the first time. All catabolites isolated until now from a chlorophyte and from angiosperms have in common the position at which the primary oxygenative ring cleavage occurs, yielding linear tetrapyrroles (19-formyl-1[21H,22H]bilinones). In vivo studies of ^18,18O₂ incorporation in one of the chlorophyll catabolites isolated from Chlorella protothecoides show unequivocally that of the two oxygen atoms inserted into the pigment, only the formyl oxygen originates from dioxygen whereas the other one, the lactamic oxygen atom, derives from water. These findings suggest a monooxygenase-catalyzed primary process in the catabolism of chlorophyll.

【 授权许可】

Unknown