EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.7.9.5 | ATP + alpha-glucan + H2O |
dikinases use ATP as a dual phosphate donor and transfer the beta- and gamma-phosphate groups to two distinct acceptor molecules, a glucan and water. A conserved histidine residue within this domain is capable of accepting the beta-phosphate group of ATP following nucleotide binding and hydrolysis. The phosphoramidate bond is acid labile, but rather stable under alkaline conditions. The gamma-phosphate group is transferred to water |
Solanum tuberosum |
AMP + phospho-alpha-glucan + phosphate |
- |
? |
2.7.9.5 | ATP + alpha-glucan + H2O |
dikinases use ATP as a dual phosphate donor and transfer the beta- and gamma-phosphate groups to two distinct acceptor molecules, a glucan and water. A conserved histidine residue within this domain is capable of accepting the beta-phosphate group of ATP following nucleotide binding and hydrolysis. The phosphoramidate bond is acid labile, but rather stable under alkaline conditions. The gamma-phosphate group is transferred to water |
Arabidopsis thaliana |
AMP + phospho-alpha-glucan + phosphate |
- |
? |
2.7.9.5 | ATP + alpha-glucan + H2O |
GWD phosphorylates the hydroxyl group at carbon atom 3, the gamma-phosphate group of ATP is transferred to water and the beta-phosphate group to an autocatalytical histidine residue via a phosphoramidate bond. GWD-dependent phosphorylation alters the granule surface structure, which favors the action of PWD. PWD phosphorylates also non pre-phosphorylated glucan chains |
Arabidopsis thaliana |
AMP + phospho-alpha-glucan + phosphate |
- |
? |
2.7.9.5 | ATP + crystalline maltodextrin + H2O |
crystalline maltodextrin (MDcryst) is used as a model substrate for glucan phosphorylating enzyme activity that mimics features of native starches, such as allomorph and crystallinity but omitted branching. Significant phosphorylation of MDcryst by PWD requires the preceding action of GWD. GWD-dependent phosphorylation alters the granule surface structure, which favors the action of PWD |
Arabidopsis thaliana |
AMP + phospho-alpha-glucosyl-maltodextrin + phosphate |
- |
? |
2.7.9.5 | ATP + phospho-maltodextrin + H2O |
only pre-phosphorylated, crystallised (insoluble) maltodextrin |
Arabidopsis thaliana |
AMP + O-phospho-[phospho-maltodextrin] + phosphate |
- |
? |
2.7.9.5 | ATP + [phospho-alpha-glucan] |
the enzyme phosphorylates granular starch that has previously been phosphorylated by EC 2.7.9.4, alpha-glucan, water dikinase |
Arabidopsis sp. |
AMP + O-phospho-[phospho-alpha-glucan] + phosphate |
- |
? |
2.7.9.5 | ATP + [phospho-alpha-glucan] |
the enzyme transfers the beta-phosphate of ATP to the phosphoglucan, whereas the gamma-phosphate is transferred to water. The protein phosphorylates itself with the beta-phosphate of ATP at a His residue of the enzyme, which is then transferred to the glucan |
Arabidopsis sp. |
AMP + O-phospho-[phospho-alpha-glucan] + phosphate |
- |
? |
2.7.9.5 | ATP + [phospho-alpha-glucan] + H2O |
- |
Solanum tuberosum |
AMP + O-phospho-[phospho-alpha-glucan] + phosphate |
- |
? |
2.7.9.5 | ATP + [phospho-alpha-glucan] + H2O |
- |
Arabidopsis thaliana |
AMP + O-phospho-[phospho-alpha-glucan] + phosphate |
- |
? |
2.7.9.5 | ATP + [phospho-alpha-glucan] + H2O |
important enzymes of starch metabolism. Catalyzes the addition of phosphate groups to amylopectin chains at the surface of starch granules, changing its physicochemical properties |
Arabidopsis thaliana |
AMP + O-phospho-[phospho-alpha-glucan] + phosphate |
- |
? |