Genome-wide identification of genes involved in raffinose metabolism in Maize

文献类型： 外文期刊

第一作者： Zhou, Mei-Liang

作者： Zhou, Mei-Liang;Zhang, Qian;Zhou, Ming;Shao, Ji-Rong;Zhou, Mei-Liang;Sun, Zhan-Min;Tang, Yi-Xiong;Wu, Yan-Min;Zhu, Xue-Mei

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关键词： metabolic engineering;oligosaccharides;phylogenetic tree;raffinose;stachyose;Zea mays

期刊名称：GLYCOBIOLOGY （ 影响因子：4.313； 五年影响因子：4.942 ）

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收录情况： SCI

摘要： The raffinose family oligosaccharides (RFOs), such as raffinose and stachyose, are synthesized by a set of distinct galactosyltransferases, which sequentially add galactose units to sucrose. The accumulation of RFOs in plant cells are closely associated with the responses to environmental factors, such as cold, heat and drought stresses. Systematic analysis of genes involved in the raffinose metabolism has not been reported to date. Searching the recently available working draft of the maize genome, six kinds of enzyme genes were speculated, which should encode all the enzymes involved in the raffinose metabolism in maize. Expression patterns of some related putative genes were analyzed. The conserved domains and phylogenetic relationships among the deduced maize proteins and their homologs isolated from other plant species were revealed. It was discovered that some of the key enzymes, such as galactinol synthase (ZmGolS5, ZmGolS45 and ZmGolS37), raffinose synthase (ZmRS1, ZmRS2, ZmRS3 and ZmRS10), stachyose synthase (ZmRS8) and-fructofuranosidase, are encoded by multiple gene members with different expression patterns. These results reveal the complexity of the raffinose metabolism and the existence of metabolic channels for diverse RFOs in maize and provide useful information for improving maize stress tolerance through genetic engineering.

分类号： Q5

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