Organism | UniProt | Comment | Textmining |
---|---|---|---|
Brassica napus | H9XTI6 and H9XTI4 and H9XTI5 | H9XTI6, i.e. isoform Gpat4-A1, H9XTI4 i.e. isoform Gpat4-C1, H9XTI5, i.e. isoform Gpat4-C2 | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | all three Gpat4 isoforms exhibit sn-2 acyltransferase and phosphatase activities with dicarboxylic acid-CoA as acyl donor. When non-substituted acyl-CoA is used as acyl donor, the rate of acylation is considerably lower and phosphatase activity is not manifested | Brassica napus | ? | - |
? | |
sn-glycerol 3-phosphate + 15-carboxypentadecanoyl-CoA | - |
Brassica napus | CoA + 2-(15-carboxypentadecanoyl)-sn-glycerol 3-phosphate | reaction mainly occurs in sn-2 position. Intrinsic phosphatase activity of the enzymes finally leads to formation of 2-(15-carboxypentadecanoyl)-sn-glycerol | ? | |
sn-glycerol 3-phosphate + palmitoyl-CoA | - |
Brassica napus | CoA + 2-palmitoyl-sn-glycerol 3-phosphate | phosphatase activity of the enzymes does not act on non-substituted acyl residues | ? |
Synonyms | Comment | Organism |
---|---|---|
GPAT4 | - |
Brassica napus |
General Information | Comment | Organism |
---|---|---|
physiological function | RNAi-mediated down-regulation of all Gpat4 homologues causes abnormal development of several reproductive organs and reduced seed set. Both pollen grains and developing embryo sacs of the downregulated Gpat4 lines are affected. The gpat4 mature embryos show decreased cutin content and altered monomer composition. The defective embryo development affects the oil body morphology, oil content, and fatty acid composition in Gpat4-lacking seeds | Brassica napus |