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Literature summary for 2.4.1.242 extracted from
- Characterization of a granule-bound starch synthase isoform found in the pericarp of wheat (1998), Plant Physiol., 118, 451-459.
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 59000 | - |
x * 59000, isozyme GBSSII, SDS-PAGE, x * 61000, isozyme GBSSI, SDS-PAGE | Triticum aestivum |
| 61000 | - |
x * 59000, isozyme GBSSII, SDS-PAGE, x * 61000, isozyme GBSSI, SDS-PAGE | Triticum aestivum |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| ADP-glucose + (1,4-alpha-glucosyl)n | Triticum aestivum | - |
ADP + (1,4-alpha-glucosyl)n+1 | - |
? |  |
| additional information | Triticum aestivum | isozyme GBSSII has an important function in amylose synthesis in the pericarp of seeds | ? | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Triticum aestivum | - |
cultivars Morikei CD-1479 and Chinese Spring, i.e. waxy wheat, 2 isozymes GBSSI, i.e. the waxy protein, and GBSSII | - |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| endosperm | isozyme GBSSI | Triticum aestivum | - |
| additional information | tissue-specific expression of isozymes GBSSI and GBSSII in different organs | Triticum aestivum | - |
| pericarp | isozyme GBSSII | Triticum aestivum | - |
| seed | immature | Triticum aestivum | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 0.00003 | - |
endosperm | Triticum aestivum |
| 0.00032 | - |
pericarp | Triticum aestivum |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| ADP-glucose + (1,4-alpha-glucosyl)n | - |
Triticum aestivum | ADP + (1,4-alpha-glucosyl)n+1 | - |
? | |
| ADP-glucose + (1,4-alpha-glucosyl)n | substrate for the granule-bound enzyme are starch granules | Triticum aestivum | ADP + (1,4-alpha-glucosyl)n+1 | - |
? | |
| additional information | isozyme GBSSII has an important function in amylose synthesis in the pericarp of seeds | Triticum aestivum | ? | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| ? | x * 59000, isozyme GBSSII, SDS-PAGE, x * 61000, isozyme GBSSI, SDS-PAGE | Triticum aestivum |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| GBSSI | - |
Triticum aestivum |
| GBSSII | - |
Triticum aestivum |
| granule-bound starch synthase I | - |
Triticum aestivum |
| granule-bound starch synthase II | - |
Triticum aestivum |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 25 | - |
assay at | Triticum aestivum |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 8.3 | - |
assay at | Triticum aestivum |
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Release 2023.1 (January 2023)
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