EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
2.4.1.242 | additional information | - |
additional information | kinetics of isozymes | Pisum sativum |
EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.4.1.21 | ADP-glucose + alpha-1,4-polyglucan | Pisum sativum | granule-bound starch synthase I synthesizes the amylose component of starch | ADP + alpha-1,4-polyglucan | - |
? | |
2.4.1.242 | ADP-glucose + (1,4-alpha-glucosyl)n | Pisum sativum | - |
ADP + (1,4-alpha-glucosyl)n+1 | - |
? | |
2.4.1.242 | additional information | Pisum sativum | isozyme GBSSI synthesizes the amylose component of starch, while isozyme GBSSII does not, due to kinetic differences | ? | - |
? |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
2.4.1.21 | Pisum sativum | - |
- |
- |
2.4.1.242 | Pisum sativum | - |
2 isozymes GBSSI and GBSSII in wild-type plants, isozyme GBSSI in rug5 mutant, and isozyme GBSSII in lam mutant | - |
EC Number | Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|---|
2.4.1.242 | additional information | - |
starch synthase and malto-oligosaccharide elongation activities of isozymes, overview | Pisum sativum |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.4.1.21 | ADP-glucose + alpha-1,4-polyglucan | granule-bound starch synthase I synthesizes the amylose component of starch | Pisum sativum | ADP + alpha-1,4-polyglucan | - |
? | |
2.4.1.21 | ADP-glucose + maltopentaose | - |
Pisum sativum | ADP + maltohexaose | granule-bound starch synthase I, smaller amounts of longer malto-oligosaccharides are also produced suggesting that starch synthase I adds 1 or more glucose units to the primer | ? | |
2.4.1.21 | ADP-glucose + maltotriose | - |
Pisum sativum | ADP + maltotetraose | starch synthase II adds only 1 glucose unit to the primer | ? | |
2.4.1.242 | ADP-glucose + (1,4-alpha-glucosyl)n | - |
Pisum sativum | ADP + (1,4-alpha-glucosyl)n+1 | - |
? | |
2.4.1.242 | additional information | isozyme GBSSI synthesizes the amylose component of starch, while isozyme GBSSII does not, due to kinetic differences | Pisum sativum | ? | - |
? | |
2.4.1.242 | additional information | isozyme GBSSI in isolated starch granules elongates malto-oligosaccharides progressively, adding more than one glucose molecule for each enzyme-glucan encounter, isozyme GBSSII also elongates malto-oligosaccharides but with lower affinity and not progressively | Pisum sativum | ? | - |
? |
EC Number | Synonyms | Comment | Organism |
---|---|---|---|
2.4.1.242 | GBSSI | - |
Pisum sativum |
2.4.1.242 | granule-bound starch synthase I | - |
Pisum sativum |
EC Number | Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|---|
2.4.1.242 | 25 | - |
assay at | Pisum sativum |
EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|---|
2.4.1.242 | 8.5 | - |
assay at | Pisum sativum |