EC Number   |
General Information |
Reference |
|---|
    2.4.1.21 | malfunction |
a mutant lacking starch synthase 4 is impaired in its ability to initiate starch granules, its chloroplasts rarely contain more than one large granule, and the plants have a pale appearance and reduced growth. The chloroplastic alpha-amylase AMY3 abundance is reduced in mutants lacking starch synthase 3 and/or 4 |
757161 |
| 2.4.1.21 | malfunction |
Arabidopsis thaliana mutants lacking the SS4 isoform of starch synthase have strongly reduced numbers of starch granules per chloroplast |
736892 |
| 2.4.1.21 | malfunction |
downregulating the expression of isoform SSIIa results in either shrunken or opaque grains with an elevated proportion of A-type starch granules. Shrunken seeds have severely reduced starch content and cannot be maintained in succeeding generations |
756775 |
| 2.4.1.21 | malfunction |
mutants lacking starch synthase 4 reveal a strongly reduced granule number per chloroplast |
758043 |
| 2.4.1.21 | malfunction |
mutations in the starch synthase IIIa gene, in combination with a highly expressed Waxy gene, lead to a high level of resistant starch |
758222 |
| 2.4.1.21 | malfunction |
starch synthase I deficiency also affects the extent of binding of other isozymes to starch granules |
735862 |
| 2.4.1.21 | metabolism |
glycogen synthesis occurs via ADP-glucose in Streptomyces coelicolor, with the pathway being strictly regulated in connection with other routes involved with oligo- and polysaccharides, as well as with antibiotic synthesis in the bacterium, metabolic scenario for glucose 6-phosphate partitioning, overview |
-, 719739 |
| 2.4.1.21 | metabolism |
granule bound starch synthase I is the dominant enzyme controlling long amylose chain synthesis. The enzyme plays a key role in determining the amylose content of cereal grains, and it competes with starch branching enzyme I during starch biosynthesis |
758321 |
| 2.4.1.21 | metabolism |
granule-bound proteins involved in amylopectin synthesis are partitioned into the starch granule as a result of their association within protein complexes, and starch synthase IIa plays a crucial role in trafficking starch synthase I and starch branching enzyme IIb into the granule matrix. A mutant starch synthase IIa that has lost catalytic activity and is unable to bind to starch additionally leads to greatly reduced activities of starch synthase I and starch branching enzyme IIb |
718799 |
| 2.4.1.21 | metabolism |
isoform SS4 interacts with the proteins fibrillin 1a and 1b, which are mainly located in plastoglobules |
736998 |
