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草莓VPE基因家族的全基因组鉴定与分子特征分析

Genome-wide identification and molecular characterization of VPE gene family in strawberry

  • 摘要: 草莓是世界范围内重要的高效特色经济作物,其野生型和栽培种资源的基因组测序均已完成。液泡加工酶(VPE)是一类半胱氨酸蛋白酶,在植物液泡蛋白加工及激活过程中发挥重要作用,会诱发液泡破裂和启动蛋白水解级联介导植物细胞程序性死亡。基于草莓中有关VPE基因家族的相关报道仍鲜见。开展了草莓VPE基因的全基因组鉴定及其分子特征分析,通过系统发育分析,总共鉴定到54个草莓VPE基因,均分布在植物液泡内,结构多样化但都具有保守的Peptidase_C13结构域。另外在栽培草莓中鉴定到野生草莓所没有的顺式作用调控元件,推测栽培草莓的部分VPE基因经过了独自进化。对草莓VPE基因家族分子进行特征分析,发现其在液泡介导的细胞编程性死亡过程中发挥功能,为今后探索草莓VPE蛋白在草莓生长和果实品质调控技术以及逆境响应分子机制奠定基础。

     

    Abstract: Strawberry is an important and highly economic crop worldwide, with the genomes of both its wild-type and cultivated varieties having been fully sequenced. Vacuolar processing enzyme (VPE), a class of cysteine proteases, play a critical role in the processing and activation of vacuolar proteins in plants. They are also implicated in inducing vacuole rupture and initiating proteolytic cascades that mediate programmed cell death. Despite their importance, research on the VPE gene family in strawberry remains limited. In this study, strawberry VPE genes were identified on the level of whole genome and analyzed on its molecular characterization. A total of 54 strawberry VPE genes were identified through phylogenetic analysis, all of which were distributed in plant vesicles, and exhibited diverse structures but shared a conserved Peptidase_C13 structural domain. The results showed that cis-acting regulatory elements were identified in cultivated strawberries, which were absent in wild types, suggesting that some VPE genes in cultivated strawberries may have undergone independent evolution. Molecular characterization of the strawberry VPE gene family revealed its functional role in vacuolar-mediated programmed cell death. These findings lay the foundation for exploring the regulation techniques of strawberry VPE proteins in strawberry growth and fruit quality, as well as the molecular mechanisms of stress response in the future.

     

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