Analysis of mboat family reveals the diversity of MBOAT1 amplification in Solanaceae
2015
Wang, Peng (Ministry of Agriculture of China, Hainan (China). Chinese Academy of Tropical Agricultural Sciences and Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Tropical Crops Genetic Resources Institute) | Gai, Jiangtao (Ministry of Agriculture of China, Hainan (China). Chinese Academy of Tropical Agricultural Sciences and Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Tropical Crops Genetic Resources Institute) | Xu, Shitao (Hainan University, Hainan (China). College of Applied Science and Technology) | Chen, Zhenxi (Huaqiao University, Fujian (China). College of Chemical Engineering) | Luo, Zhaopeng (Zhengzhou Tobacco Research Institute of CNTC, Henan (China). High-tech Zone) | Cao, Zhenmu (Ministry of Agriculture of China, Hainan (China). Chinese Academy of Tropical Agricultural Sciences and Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Tropical Crops Genetic Resources Institute) | Jin, Lifeng (Zhengzhou Tobacco Research Institute of CNTC, Henan (China). High-tech Zone) | Li, Feng (Zhengzhou Tobacco Research Institute of CNTC, Henan (China). High-tech Zone)
Genes containing an MBOAT (membrane-bound O-acyltransferase) domain form a large gene family in plants whose members play important roles in plant triacylglycerol biosynthesis. Among these genes, most belong to the MBOAT1 subfamily. Here we describe the identification and analysis of MBOAT genes in Solanaceae. Through data mining of four sequenced geno es of Solanaceae, we identified 52 MBOAT members. The MBOAT genes fell into four distinct groups, with MBOAT1 subfamily genes accounting for about half of the total number of genes. Several MBOAT1 genes were present in the genomes of hot pepper, tomato and potato, whereas only one was identified in Nicotiana benthamiana. Most of tomato MBOAT1 genes were loc lized in chromosomes in the form of clusters, which is the same in potato, indicating that the population of MBOAT1 members was mainly the result of tandem duplication. Some tomato MBOAT1 genes were not expressed, and all MBOAT1 genes were devoid of introns and were significantly shorter than other MBOAT members were. While average pairwise Ka/Ks values weresignificantly lower within the MBOAT1 subfamily, some MBOAT1 genes showed signs of positive selection.
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