GASA encodes a class of cysteine-rich functional proteins and widely exists in plants. Most GASA proteins are involved in the signal transmission of plant hormones and regulate plant growth and development, but their function in Jatropha curcas is still unknown. In our study, we cloned a member of GASA family from J. curcas-JcGASA6. JcGASA6 protein has a GASA conserved domain and is located in tonoplast. The three-dimensional structure of JcGASA6 protein is highly consistent with antibacterial protein Snakin-1. Moreover, JcGASA6 was activated by JcERF1, JcPYL9 and JcFLX. Both JcCNR8 and JcSIZ1 can interact with JcGASA6 in the nucleus. The expression of JcGASA6 increased continuously during male flower development, and overexpression of JcGASA6 cause filament elongation of stamen in tobacco. All our results reveal the function of JcGASA6 from the protein and gene levels, and enriched signal network of GASA Protein in hormone crosstalk.
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