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Literature summary for 2.3.1.20 extracted from
- Characterization of a type-2 diacylglycerol acyltransferase from Haematococcus pluvialis reveals possible allostery of the recombinant enzyme (2020), Lipids, 55, 425-433.
Cloned(Commentary)
| Cloned (Comment) | Organism |
|---|---|
| gene DGAT2, identified from a transcriptome database, DNA and amino acid sequence determination and analysis of DGAT2 isozymes, DGAT2A, DGAT2B, DGAT2D, and DGAT2E, sequence comparisons and phylogenetic analysis, recombinant expression in TAG-deficient Saccharomyces cerevisiae strain H1246. Triacylglycerol (TAG) is synthesized with expression of HpDGAT2A and HPDGAT2D, but no TAG is detected in cells expressing HpDGAT2B and HpDGAT2E | Haematococcus lacustris |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| additional information | - |
additional information | Michaelis-Menten or allosteric sigmoidal kinetics | Haematococcus lacustris |
Localization
| Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|
| membrane | isozymes HpDGAT2B and HpDGAT2D contain two transmembrane domains each, while isozymes HpDGAT2A and HpDGAT2E do not | Haematococcus lacustris | 16020 | - |
| microsome | - |
Haematococcus lacustris | - |
- |
Metals/Ions
| Metals/Ions | Comment | Organism | Structure |
|---|---|---|---|
| Mg2+ | required | Haematococcus lacustris |  |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 25275 | - |
HpDGAT2A isozyme, sequence calculation | Haematococcus lacustris |
| 34864 | - |
HpDGAT2E isozyme, sequence calculation | Haematococcus lacustris |
| 37606 | - |
HpDGAT2D isozyme, sequence calculation | Haematococcus lacustris |
| 39912 | - |
HpDGAT2B isozyme, sequence calculation | Haematococcus lacustris |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| acyl-CoA + 1,2-diacyl-sn-glycerol | Haematococcus lacustris | - |
CoA + 1,2,3-triacylglycerol | - |
? | |
| acyl-CoA + 1,2-diacyl-sn-glycerol | Haematococcus lacustris UTEX 2505 | - |
CoA + 1,2,3-triacylglycerol | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Haematococcus lacustris | A0A699ZU33 | - |
- |
| Haematococcus lacustris UTEX 2505 | A0A699ZU33 | - |
- |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| acyl-CoA + 1,2-diacyl-sn-glycerol | - |
Haematococcus lacustris | CoA + 1,2,3-triacylglycerol | - |
? | |
| acyl-CoA + 1,2-diacyl-sn-glycerol | - |
Haematococcus lacustris UTEX 2505 | CoA + 1,2,3-triacylglycerol | - |
? | |
| additional information | the TAG isolated from yeast producing HpDGAT2D contains about 80% of 18:1 and 16:1 and about 20% of 18:0 and 16:0, suggesting thatHpDGAT2D may have a lower preference for 16:0-containing substrate | Haematococcus lacustris | ? | - |
- |
|
| additional information | the TAG isolated from yeast producing HpDGAT2D contains about 80% of 18:1 and 16:1 and about 20% of 18:0 and 16:0, suggesting thatHpDGAT2D may have a lower preference for 16:0-containing substrate | Haematococcus lacustris UTEX 2505 | ? | - |
- |
|
| oleoyl-CoA + 1,2-dioleoyl-sn-glycerol | - |
Haematococcus lacustris | CoA + 1,2,3-trioleoyl-sn-glycerol | - |
? | |
| oleoyl-CoA + 1,2-dioleoyl-sn-glycerol | - |
Haematococcus lacustris UTEX 2505 | CoA + 1,2,3-trioleoyl-sn-glycerol | - |
? | |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| DGAT | - |
Haematococcus lacustris |
| DGAT2 | - |
Haematococcus lacustris |
| diacylglycerol acyltransferase | - |
Haematococcus lacustris |
| HpDGAT2A | - |
Haematococcus lacustris |
| HpDGAT2B | - |
Haematococcus lacustris |
| HpDGAT2D | - |
Haematococcus lacustris |
| HpDGAT2E | - |
Haematococcus lacustris |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 30 | - |
assay at | Haematococcus lacustris |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 7.4 | - |
assay at | Haematococcus lacustris |
pI Value
| Organism | Comment | pI Value Maximum | pI Value |
|---|---|---|---|
| Haematococcus lacustris | isoelectric focusing, HpDGAT2D isozyme | - |
9.54 |
| Haematococcus lacustris | isoelectric focusing, HpDGAT2B isozyme | - |
9.6 |
| Haematococcus lacustris | isoelectric focusing, HpDGAT2E isozyme | - |
9.72 |
| Haematococcus lacustris | isoelectric focusing, HpDGAT2A isozyme | - |
9.86 |
General Information
| General Information | Comment | Organism |
|---|---|---|
| metabolism | diacylglycerol acyltransferase (DGAT) catalyzes the last step of the acyl-CoA-dependent triacylglycerol (TAG) biosynthesis and appears to represent a bottleneck in algal TAG formation. In Haematococcus pluvialis, the fatty acid composition of total lipids and TAG is changed when the algae cells are subjected to light stress, in which 16:0, 18:1, and 18:2 increase with the concomitant decreases in 18:3 | Haematococcus lacustris |
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