期刊
GENE
卷 453, 期 1-2, 页码 1-8出版社
ELSEVIER
DOI: 10.1016/j.gene.2009.12.006
关键词
Gene evolution; DNA-binding domain; Developmental regulation; Transcriptional regulation
资金
- U.S. Department of Agriculture-Cooperative State Research, Education, and Extension Service
Transcription factors containing two or three imperfect tandem repeats of the Myb DNA-binding domain (named R2R3 and R1R2R3, respectively) regulate important processes in growth and development. This study characterizes the structure, evolution, and expression of these proteins in the potato pathogen Phytophthora infestans and other oomycetes. P. infestans was found to encode five R2R3 and nine R1R2R3 transcription factor-like proteins, plus several with additional configurations of Myb domains. Sets of R2R3 and R1R2R3 orthologs are well-conserved in three Phytophthora species. Analyses of sites that bind DNA in canonical Myb transcription factors, such as mammalian c-Myb, revealed unusual diversification in the DNA recognition helices of the oomycete proteins. While oomycete R2R3 proteins contain c-Myb-like helices, R1R2R3 proteins exhibit either c-Myb-like or novel sequences. This suggests divergence in their DNA-binding specificities, which was confirmed by electrophoretic mobility shift assays. Eight of the P. infestans R2R3 and R1R2R3 genes are up-regulated during sporulation and three during zoospore release, which suggests their involvement in spore development. This is supported by the observation that an oomycete that does not form zoospores, Hyaloperonospora arabidopsidis, contains one-third fewer of these genes than Phytophthora. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据