Journal
GENETICS AND MOLECULAR BIOLOGY
Volume 39, Issue 4, Pages 524-538Publisher
SOC BRASIL GENETICA
DOI: 10.1590/1678-4685-GMB-2016-0024
Keywords
Triacylglycerol biosynthesis; DGAT; phylogeny; gene structure
Funding
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) [559636/2009-1, 472574/2011-6]
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior)
- FAPERGS (Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul)
- FINEP (Financiadora de Projetos)
- MCT (Ministerio de Ciencia e Tecnologia)
- DOCFIX (CAPES/FAPERGS) fellowships
- CNPq research fellowships [307868/2011-7, 303967/2008-0]
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Since the first diacylglycerol acyltransferase (DGAT) gene was characterized in plants, a number of studies have focused on understanding the role of DGAT activity in plant triacylglycerol (TAG) biosynthesis. DGAT enzyme is essential in controlling TAGs synthesis and is encoded by different genes. DGAT1 and DGAT2 are the two major types of DGATs and have been well characterized in many plants. On the other hand, the DGAT3 and WS/DGAT have received less attention. In this study, we present the first general view of the presence of putative DGAT3 and WS/DGAT in several plant species and report on the diversity and evolution of these genes and its relationships with the two main DGAT genes (DGAT1 and DGAT2). According to our analyses DGAT1, DGAT2, DGAT3 and WS/DGAT are very divergent genes and may have distinct origin in plants. They also present divergent expression patterns in different organs and tissues. The maintenance of several types of genes encoding DGAT enzymes in plants demonstrates the importance of DGAT activity for TAG biosynthesis. Evolutionary history studies of DGATs coupled with their expression patterns help us to decipher their functional role in plants, helping to drive future bio-technological studies.
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