Genome-wide identification of C2H2 zinc-finger gene family in rice and their phylogeny and expression analysis

Abstract

Transcription factors regulate gene expression in response to various external and internal cues by activating or suppressing downstream genes in a pathway. In this study, we provide a complete overview of the genes encoding C2H2 zinc-finger transcription factors in rice, describing the gene structure, gene expression, genome localization, and phylogenetic relationship of each member. The genome of Oryza sativa codes for 189 C2H2 zinc-finger transcription factors, which possess two main types of zincfingers (named C and Q). The Q-type zinc fingers contain a conserved motif, QALGGH, and are plant specific, whereas C type zinc fingers are found in other organisms as well. A genome-wide microarray based gene expression analysis involving 14 stages of vegetative and reproductive development along with 3 stress conditions has revealed that C2H2 gene family in indica rice could be involved during all the stages of reproductive development from panicle initiation till seed maturation.