Novel nuclear-encoded proteins interacting with a plastid sigma factor, Sig1, in Arabidopsis thaliana

被引：67

作者：

Morikawa, K

Shiina, T

Murakami, S

Toyoshima, Y

机构：

[1] Kyoto Univ, Grad Sch Human & Environm Studies, Sakyo Ku, Kyoto 6068501, Japan

[2] Kyoto Prefectural Univ, Fac Human Environm, Sakyo Ku, Kyoto 6065822, Japan

来源：

FEBS LETTERS | 2002年 / 514卷 / 2-3期

基金：

日本学术振兴会;

关键词：

plastid RNA polymerase; sigma factor binding protein;

D O I：

10.1016/S0014-5793(02)02388-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Sigma factor binding proteins are involved in modifying the promoter preferences of the RNA polymerase in bacteria. We found the nuclear encoded protein (SibI) that is transported into chloroplasts and interacts specifically with the region 4 of Sig1 in Arabidopsis. SibI and its homologue, T3K9.5 are novel proteins, which are not homologous to any protein of known function. The expression of sibI was tissue specific, light dependent, and developmentally timed. We suggest the transcriptional regulation by sigma factor binding proteins to function in the plastids of higher plant. (C) 2002 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved.

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页码：300 / 304

页数：5

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