R&D CENTER

Genome-wide Identification of GATA Transcription Factors in Seven Populus Genomes

Mangi Kim, Hong Xi, and Jongsun Park
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GATA transcription factors (TFs) are widespread eukaryotic regulators whose DNA-binding domain is a class IV zinc finger motif (CX2CX17-20CX2C) followed by a basic region. We identified GATA TFs from seven Populus genomes to understand phylogenomic position of Populus GATA TFs. 262 GATA TFs (389 transcripts) from seven Populus genomes were classified into four subfamilies (I to IV), which are common in both monocots and dicots. Some Populus GATA TFs in subfamily III lack CCT domain found in all Arabidopsis GATA TFs in same subfamily. Populus-specific conserved amino acids on GATA domain were identified in subfamilies I and II against those of Arabidopsis GATA TFs. One GATA TF has maximumly nine alternative transcripts of which some show differences in both untranslated regions. Phylogenetic tree of Populus GATA TFs presents that most of clades show similar number of GATA TFs from each Populus species. We established database in Populus Comparative Genomics Database (http://www.populusgenome.info/) to provide detailed information of GATA TFs analyzed in this study. Our analyses with database will be a corner stone to understand transcription factors among seven Populus genomes.