Nicotinate riboside salvage in plants: Presence of nicotinate riboside kinase in mungbean seedlings

被引：12

作者：

Matsui, Ayu ^{[1
]}

Ashihara, Hiroshi ^{[1
]}

机构：

[1] Ochanomizu Univ, Grad Sch Human & Sci, Dept Biol Sci, Bunkyo Ku, Tokyo 1128610, Japan

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2008年 / 46卷 / 01期

关键词：

NAD synthesis; nicotinate riboside; nucleoside salvage; pyridine nucleotide cycle;

D O I：

10.1016/j.plaphy.2007.10.008

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Salvage of nicotinate riboside for NAD synthesis was investigated in mungbean seedlings. Nicotinate riboside kinase activity was detected in extracts from cotyledons. Exogenously supplied [carboxyl-C-14]nicotinate riboside was readily converted into pyridine nucleotides in cotyledons of mungbean seedlings. This conversion was also found in embryonic axes, but the rate was lower than in cotyledons. These results suggest that, in addition to the seven-component pyridine nucleotide cycle (PNC VII), an eight-component cycle (PNC VIII) involving nicotinate riboside kinase operates in plants. (c) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：104 / 108

页数：5

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