WRKY
Brief Introduction
- The plant WRKY gene family was first identified from sweet potato by Ishiguro and Nakamura in the year 1994[1][2][3]. WRKY gene family members contain one or two highly conserved WRKY domains consisted of approximately 60 amino acids and a novel zinc finger motif in the C-terminal region[2][3][4][5][6][7].WRKY proteins with two WRKY domains were classified into Group I, whereas most proteins with one WRKY domain were classified into Group II[2][5][6].
- WRKY factors play a important role in responses to abiotic stresses and regulating the pathogen-induced defense program. Some WRKY factors have been reported to be associated with defence-induced mitogen-activated protein kinase (MAPK) signaling cascades. Some WRKY proteins seem to be involved in some other plant-specific processes, such as trichome development, the biosynthesis of secondary metabolites and senecence[2][3][4][5].
- The previous phylogenetic analysis of WRKY domains showed WRKY domains of the same type forming independent domains within their species, suggesting that numerous WRKY gene duplications occurred after the divergence of the monocotyledons from dicotyledons some 50–80 million years ago[5][7].
- Pfam: PF03106
Japonica Group
Indica Group
References
- ↑ Ishiguro S, Nakamura K. Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5' upstream regions of genes coding for sporamin and beta-amylase from sweet potato. Mol Gen Genet. 1994 Sep 28;244(6):563-71.
- ↑ 2.0 2.1 2.2 2.3 Eulgem T, Rushton P J, Robatzek S, et al. The WRKY superfamily of plant transcription factors[J]. Trends in plant science, 2000, 5(5): 199-206.
- ↑ 3.0 3.1 3.2 Ülker B, Somssich I E. WRKY transcription factors: from DNA binding towards biological function[J]. Current opinion in plant biology, 2004, 7(5): 491-498.
- ↑ 4.0 4.1 Ross C A, Liu Y, Shen Q J. The WRKY gene family in rice (Oryza sativa)[J]. Journal of Integrative Plant Biology, 2007, 49(6): 827-842.
- ↑ 5.0 5.1 5.2 5.3 Ramamoorthy R, Jiang S Y, Kumar N, et al. A comprehensive transcriptional profiling of the WRKY gene family in rice under various abiotic and phytohormone treatments[J]. Plant and cell physiology, 2008, 49(6): 865-879.
- ↑ 6.0 6.1 Xie Z, Zhang Z L, Zou X, et al. Annotations and functional analyses of the rice WRKY gene superfamily reveal positive and negative regulators of abscisic acid signaling in aleurone cells[J]. Plant physiology, 2005, 137(1): 176-189.
- ↑ 7.0 7.1 Wu K L, Guo Z J, Wang H H, et al. The WRKY family of transcription factors in rice and Arabidopsis and their origins[J]. DNA research, 2005, 12(1): 9-26.
