Transcriptome-wide Identification and Expression Profiles of WRKY Transcription Factor in Prunella vulgaris / 中国实验方剂学杂志

ABSTRACT

Objective:To identify WRKY genes from the transcriptome dataset of Prunella vulgaris by bioinformatics method, and analyze the protein characteristics and expression level of these genes. Method:WRKY transcription factor were identified from the P. vulgaris transcriptome database，their motif，physical and chemical properties，functional annotations，family evolution and expression patterns were analyzed, and their functions were predicted. Result:A total of 23 WRKY transcription factors were identified from P. vulgaris in this study by computational prediction method.Structural analysis found that WRKY proteins contained a highly conserved motif WRKYGQK. Phylogenetic analysis of WRKYs together with the homologous genes from Arabidopsis thaliana could be divided into two groups（group Ⅰ-Ⅱ）. There were 7 members in group Ⅰ，and 16 members in group Ⅱ, group Ⅱ was subdivided into five subgroups，namely group Ⅱb （3 members），Ⅱc（5 members），Ⅱd（3 members），Ⅱe（5 members）. The physical and chemical properties of WRKY protein showed that the amino acid number was between 85 and 599，the molecular weight was between 9 527.5-66 438.45 Da，the theoretical isoelectric point was between 5.01-9.83.Among them, c13719.graph_c0，c32199.graph_c0，c24547.graph_c0，c37881.graph_c0 may play a role in the regulation of secondary metabolitessynthesis of P. vulgaris.And c32199.graph_c0，c26537.graph_c0，c23728.graph_c0 may has an effect in identifying and defensing pathogens in P. vulgaris.The transcriptional profiles of these 23 WRKY genes in various tissues were investigated using transcriptome dataset.The results showed that the expression level of WRKY genes varied significantly in different tissues. Conclusion:This study identifies the organization and transcriptional profiles of PmWRKY genes for the first time, so as to provide the helpful information for further studies of functions of WRKYs.