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Comprehensive identification of Arabidopsis thaliana MYB transcription factors interacting with R/B-like BHLH proteins 总被引:8,自引:0,他引:8
Zimmermann IM Heim MA Weisshaar B Uhrig JF 《The Plant journal : for cell and molecular biology》2004,40(1):22-34
In-depth analysis of protein-protein interaction specificities of the MYB protein family of Arabidopsis thaliana revealed a conserved amino acid signature ([DE]Lx(2)[RK]x(3)Lx(6)Lx(3)R) as the structural basis for interaction between MYB and R/B-like BHLH proteins. The motif has successfully been used to predict new MYB/BHLH interactions for A. thaliana proteins, it allows to discriminate between even closely related MYB proteins and it is conserved amongst higher plants. In A. thaliana, the motif is shared by fourteen R2R3 MYB proteins and six 1R MYB proteins. It is located on helices 1 and 2 of the R3 repeat and forms a characteristic surface-exposed pattern of hydrophobic and charged residues. Single-site mutation of any amino acid of the signature impairs the interaction. Two particular amino acids have been determined to account for most of the interaction stability. Functional specificity of MYB/BHLH complexes was investigated in vivo by a transient DFR promoter activation assay. Residues stabilizing the MYB/BHLH interaction were shown to be critical for promoter activation. By virtue of proved and predicted interaction specificities, this study provides a comprehensive survey of the MYB proteins that interact with R/B-like BHLH proteins potentially involved in the TTG1-dependent regulatory interaction network. The results are discussed with respect to multi-functionality, specificity and redundancy of MYB and BHLH protein function. 相似文献
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The Arabidopsis transcription factor MYB77 modulates auxin signal transduction 总被引:6,自引:0,他引:6
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Shin R Burch AY Huppert KA Tiwari SB Murphy AS Guilfoyle TJ Schachtman DP 《The Plant cell》2007,19(8):2440-2453
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植物MYB类转录因子研究进展 总被引:23,自引:0,他引:23
植物MYB转录因子以含有保守的MYB结构域为共同特征,广泛参与植物发育和代谢的调节。含单一MYB结构域的MYB转录因子在维持染色体结构和转录调节上发挥着重要作用,是MYB转录因子家族中较为特殊的一类。含两个MYB结构域的MYB转录因子成员众多,在植物体内主要参与次一代谢的调节和控制细胞的形态发生。含3个MYB结构域的MYB蛋白与c-MYB蛋白高度同源,可能在调节细胞周期中起作用。 相似文献
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Multifunctionality and diversity within the plant MYB-gene family 总被引:49,自引:0,他引:49
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The R2R3-MYB gene family in Arabidopsis thaliana 总被引:25,自引:0,他引:25
MYB factors represent a family of proteins that include the conserved MYB DNA-binding domain. In contrast to animals, plants contain a MYB-protein subfamily that is characterised by the R2R3-type MYB domain. 'Classical' MYB factors, which are related to c-Myb, seem to be involved in the control of the cell cycle in animals, plants and other higher eukaryotes. Systematic screens for knockout mutations in MYB genes, followed by phenotypic analyses and the dissection of mutants with interesting phenotypes, have started to unravel the functions of the 125 R2R3-MYB genes in Arabidopsis thaliana. R2R3-type MYB genes control many aspects of plant secondary metabolism, as well as the identity and fate of plant cells. 相似文献
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Molecular characterization of 60 isolated wheat MYB genes and analysis of their expression during abiotic stress 总被引:3,自引:0,他引:3
The proteins of the MYB superfamily play central roles in developmental processes and defence responses in plants. Sixty unique wheat MYB genes that contain full-length cDNA sequences were isolated. These 60 genes were grouped into three categories, namely one R1R2R3-MYB, 22 R2R3-MYBs, and 37 MYB-related members. The sequence composition of the R2 and R3 repeats was conserved among the 22 wheat R2R3-MYB proteins. Phylogenetic comparison of the members of this superfamily among wheat, rice, and Arabidopsis revealed that the putative functions of some wheat MYB proteins were clustered into the Arabidopsis functional clades. Tissue-specific expression profiles showed that most of the wheat MYB genes were expressed in all of the tissues examined, suggesting that wheat MYB genes take part in multiple cellular processes. The expression analysis during abiotic stress identified a group of MYB genes that respond to one or more stress treatments. The overexpression of a salt-inducible gene, TaMYB32, enhanced the tolerance to salt stress in transgenic Arabidopsis. This study is the first comprehensive study of the MYB gene family in Triticeae. 相似文献
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Arabidopsis TRANSPARENT TESTA GLABRA2 is directly regulated by R2R3 MYB transcription factors and is involved in regulation of GLABRA2 transcription in epidermal differentiation 总被引:6,自引:0,他引:6
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Ishida T Hattori S Sano R Inoue K Shirano Y Hayashi H Shibata D Sato S Kato T Tabata S Okada K Wada T 《The Plant cell》2007,19(8):2531-2543
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The R2R3 MYB transcription factor PavMYB10.1 involves in anthocyanin biosynthesis and determines fruit skin colour in sweet cherry (Prunus avium L.) 总被引:1,自引:0,他引:1
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Wanmei Jin Hua Wang Maofu Li Jing Wang Yuan Yang Xiaoming Zhang Guohua Yan Hong Zhang Jiashen Liu Kaichun Zhang 《Plant biotechnology journal》2016,14(11):2120-2133
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