Novel nuclear-encoded proteins interacting with a plastid sigma factor, Sig1, in Arabidopsis thaliana
Novel nuclear-encoded proteins interacting with a plastid sigma factor, Sig1, in Arabidopsis thaliana
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DOI：
10.1016/s0014-5793(02)02388-8
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发表时间：
2002-03-13
期刊：
影响因子：
3.5
通讯作者：
Toyoshima, Y
中科院分区：
文献类型：
--
作者：
Morikawa, K;Shiina, T;Toyoshima, Y
Sigma因子结合蛋白参与改变细菌中RNA聚合酶的启动子偏好。我们在拟南芥中发现了核编码蛋白(SIBI)，它被转运到叶绿体中，并与Sig1的第4区域特异地相互作用。SIBI及其同源物T3K9.5是一种新的蛋白质，与任何已知功能的蛋白质都不是同源的。SIBI的表达具有组织特异性、光依赖性和发育时序性。我们认为通过Sigma因子结合蛋白的转录调控在高等植物的质体中发挥作用。(C)2002年欧洲生化学会联合会。爱思唯尔科学公司出版。版权所有。
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.