Genome-wide Identification and Bioinformatics Analysis of the SUS Gene Family in Banana
Sucrose synthase(SUS)is a crucial enzyme in plant sucrose metabolism that can catalyze both the decomposition and synthesis of sucrose.SUS is encoded by multiple gene families,and all members of the SUS gene family have been iso-lated from several species.However,there have been no reports on the SUS gene family in bananas.Five SUS genes,named MaSUS1-5,were identified from the banana genome in this study and were unevenly distributed on four chromosomes,in-cluding Chr3,Chr7,Chr8,and Chr9.Its amino acid numbers range from 624 aa to 844 aa.Random coils and α-helixes were the main secondary structures.All five SUS genes were located in the cytoplasm by subcellular localization prediction analysis.Evolutionary tree analysis revealed that MaSUS1 and MaSUS4 belong to the SUS Ⅱ subfamily,MaSUS2 and MaSUS5 belong to the SUS Ⅲ subfamily,and MaSUS3 belongs to the SUS Ⅰ subfamily.The number of exons ranged from 12 to 15,and the number of introns ranged from 11 to 14.The prediction of cis-acting elements revealed that the number of light-responsive elements was the highest,followed by hormone-responsive elements,and that of stress-responsive elements was the lowest.This study provides a preliminary basis for studying the molecular mechanisms of regulating sucrose metabolism in bananas.
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