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Genome-Wide Identification and Comparative Analysis of the 3-Hydroxy-3-methylglutaryl Coenzyme A Reductase (HMGR) Gene Family in Gossypium

文献类型： 外文期刊

作者： Liu, Wei 1 ; Zhang, Zhiqiang 1 ; Li, Wei 1 ; Zhu, Wei 1 ; Ren, Zhongying 1 ; Wang, Zhenyu 1 ; Li, Lingli 1 ; Jia, Lin 1 ; Zhu, Shuijin 4 ; Ma, Zongbin 3 ;

作者机构： 1.Collaborative Innovation Center of Henan Grain Crops/Agronomy College, Henan Agricultural University, Zhengzhou 450002, China

2.State Key Laboratory of Cotton Biology/Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang 455000, China

3.Henan Agr Univ, Agron Coll, Collaborat Innovat Ctr Henan Grain Crops, Zhengzhou 450002, Henan, Peoples R China

4.;Zhejiang Univ, Dept Agron, Hangzhou 310058, Zhejiang, Peoples R China

5.Department of Agronomy, Zhejiang University, Hangzhou 310058, China

关键词： Gossypium; HMGR; terpene biosynthesis; gene expansion; pseudogene

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN： 1420-3049

年卷期： 2018 年 23 卷 2 期

页码：

收录情况： SCI

摘要： Terpenes are the largest and most diverse class of secondary metabolites in plants and play a very important role in plant adaptation to environment. 3-Hydroxy-3-methylglutaryl coenzyme A reductase (HMGR) is a rate-limiting enzyme in the process of terpene biosynthesis in the cytosol. Previous study found the HMGR genes underwent gene expansion in Gossypium raimondii, but the characteristics and evolution of the HMGR gene family in Gossypium genus are unclear. In this study, genome-wide identification and comparative study of HMGR gene family were carried out in three Gossypium species with genome sequences, i.e., G. raimondii, Gossypium arboreum, and Gossypium hirsutum. In total, nine, nine and 18 HMGR genes were identified in G. raimondii, G. arboreum, and G. hirsutum, respectively. The results indicated that the HMGR genes underwent gene expansion and a unique gene cluster containing four HMGR genes was found in all the three Gossypium species. The phylogenetic analysis suggested that the expansion of HMGR genes had occurred in their common ancestor. There was a pseudogene that had a 10-bp deletion resulting in a frameshift mutation and could not be translated into functional proteins in G. arboreum and the A-subgenome of G. hirsutum. The expression profiles of the two pseudogenes showed that they had tissue-specific expression. Additionally, the expression pattern of the pseudogene in the A-subgenome of G. hirsutum was similar to its paralogous gene in the D-subgenome of G. hirsutum. Our results provide useful information for understanding cytosolic terpene biosynthesis in Gossypium species.

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