Catalyzes the formation of diacylglycerol from 2-monoacylglycerol and fatty acyl-CoA. Probably not involved in absorption of dietary fat in the small intestine. a 2-acylglycerol + an acyl-CoA = a 1,2-diacyl-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1,2-di-(9Z-octadecenoyl)-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z-octadecenoyl)-glycerol = 1,2-di-(9Z-octadecenoyl)-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + butanoyl-CoA = 1-butyryl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + octanoyl-CoA = 1-octanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + dodecanoyl-CoA = 1-dodecanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + tetradecanoyl-CoA = 1-tetradecanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + hexadecanoyl-CoA = 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + octadecanoyl-CoA = 1-octadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + eicosanoyl-CoA = 1-eicosanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (9Z,12Z)-octadecadienoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1-(9Z,12Z)-octadecadienoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (5Z,8Z,11Z,14Z)-eicosatetraenoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-dodecanoylglycerol = 1-dodecanoyl-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-tetradecanoylglycerol = 1-tetradecanoyl-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-hexadecanoylglycerol = 1-hexadecanoyl-2-(9Z-octadecenoyl)glycerol + CoA (9Z)-octadecenoyl-CoA + 1-octadecanoylglycerol = 1-octadecanoyl-2-(9Z)-octadecenoylglycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z,12Z-octadecadienoyl)-glycerol = 1-(9Z,12Z-octadecadienoyl)-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z,12Z,15Z-octadecatrienoyl)-glycerol = 1-(9Z,12Z,15Z-octadecatrienoyl)-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-glycerol = 1-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-2-(9Z-octadecenoyl)-glycerol + CoA hexadecane-1,2-diol + hexadecanoyl-CoA = 2-hydroxyhexadecyl hexadecanoate + CoA Glycerolipid metabolism; triacylglycerol biosynthesis. Expressed at high level in kidney and stomach. Expressed at lower level in brown and white adipose tissue, uterus and liver. Not detected in small intestine. Belongs to the diacylglycerol acyltransferase family.