[关键词]
[摘要]
目的 为阐明广藿香类胡萝卜素代谢途径,克隆了广藿香Pogostemon cablin八氢番茄红素脱氢酶(phytoene desaturase,PDS)基因,并对其进行相关生物信息学分析。方法 搜索本课题组建立的广藿香转录组数据库,获得PDS基因全长序列,并设计全长引物进行PCR验证;利用生物信息学软件对PDS基因进行生物信息学分析。结果 本研究获得的广藿香PDS基因命名为PcPDS1(GenBank登录号为KC854409),该基因全长1 960个碱基,编码569个氨基酸。基于生物信息软件分析了PcPDS1基因编码蛋白的理化特性。系统进化树分析结果表明,PcPDS1基因与黄龙胆Gentiana lutea的PDS序列同源性最高,与烟草Nicotiana tabacum、番薯Ipomoea batatas次之,与自然进化关系保持一致。结论 成功克隆、分析了广藿香PcPDS1基因。
[Key word]
[Abstract]
Objective In order to elucidate the carotenoid metabolic pathway in Pogostemon cablin, a phytoene desaturase (PDS) of P. cablin (PcPDS1) gene was cloned and analyzed bioinformatically. Methods The full length PDS gene sequence was retrieved from transcriptomic database of P. cablin, the full length primer was designed for PCR verification, and PcPDS1 gene was analyzed using several bioinformatical softwares. Results PcPDS1 (NCBI accession, KC854409) contained 1 960 bp length of open reading frame (ORF) and encoded 569 amino acids postulated. Additionally, the physical and chemical properties of PcPDS1-coded protein were analyzed by bioinformatical softwares. Phylogenetic analysis showed that PcPDS1 was tightly clustered with PDS genes in Gentiana lutea, Nicotiana tabacum, and Ipomoea batatas, which is consistent to the phylogenetic relationship of species. Conclusion PcPDS1 is successfully coloned and molecularly characterized.
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[基金项目]
广东省科技厅粤港关键领域重点突破项目(2009A03090101);广州市科技计划基础研究项目(2013J4100076);广东食品药品职业学院课题(2012YZ002)