Molecular characterization of EgMYB1, a putative transcriptional repressor of the lignin biosynthetic pathway
Molecular characterization of EgMYB1, a putative transcriptional repressor of the lignin biosynthetic pathway
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DOI：
10.1016/j.plantsci.2007.08.007
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发表时间：
2007-11-01
期刊：
影响因子：
5.2
通讯作者：
Grima-Pettenati, Jacqueline
中科院分区：
文献类型：
--
作者：
Legay, Sylvain;Lacombe, Eric;Grima-Pettenati, Jacqueline
从桉树木质部cDNA文库中克隆了一个大型植物R2R3 MYB家族的转录因子EgMYB 1。EgMYB 1在桉树茎和根的次生木质部中优先表达，相应的蛋白定位于细胞核。EgMYB 1特异性结合位于木质素生物合成基因启动子中的MBSIIG位点，并在植物中抑制这些基因的转录。这些结果表明，EgMYB 1，亚组4的新成员，是一个负调控的木质素分支途径，并代表了一个新的工具，控制木质素的配置文件在植物中。(C)2007爱思唯尔爱尔兰有限公司保留所有权利。
EgMYB1, a transcription factor of the large plant R2R3 MYB family was cloned from a Eucalyptus xylem cDNA library. EgMYB1 is preferentially expressed in the secondary xylem of stems and roots of Eucalyptus trees, and the corresponding protein is localized in the nucleus. EgMYB1 binds specifically the MBSIIG sites located in the promoters of lignin biosynthetic genes, and represses the transcription of these genes in planta. These results suggest that EgMYB1, a new member of subgroup 4, is a negative regulator of the lignin branch pathway and represents a new tool for controlling lignin profiles in plants. (C) 2007 Elsevier Ireland Ltd. All rights reserved.