EC Number   |
Natural Substrates |
|---|
    2.4.1.21 | ADP-alpha-D-glucose + [(1->4)-alpha-D-glucosyl]n |
- |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-D-glucosyl)n |
granule-bound starch synthase I is responsible for biosynthesis of extra-long unit chains of amylopectin in rice |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-D-glucosyl)n |
SSIII is able to partially function in production of DP12 to DP25 chains. SSIII is not required for the normal population of these chains |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-D-glucosyl)n |
the activity of SSII is required in Arabidopsis for production of the normal frequency of amylopectin chains of DP12 to DP25. None of the other SS classes can completely compensate for loss of SSII, however, SSIII is able to partially function in production of DP12 to DP25 chains |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-glucosyl)n |
amylopectin chains are synthesized by the coordinated actions of SSI, SSIIa, and SSIIIa isoforms |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-glucosyl)n |
function of SSI is mainly involved in the synthesis of small outer chains during amylopectin cluster synthesis |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-glucosyl)n |
low CO2 level up-regulates GBSS biosynthesis at the transcriptional level |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-glucosyl)n |
SSI regulates the population of short chains. Low activity of SSI gives rise to the decrease of short chains in amylopectin of indica rice varieties, suggesting that SSI effects the differences in physicochemical properties between the varieties |
| 2.4.1.21 | ADP-glucose + (1,4-alpha-glucosyl)n |
SSII is a starch synthase for the synthesis of both transit and storage starch |
| 2.4.1.21 | ADP-glucose + alpha-1,4-polyglucan |
granule-bound starch synthase I synthesizes the amylose component of starch |
