EC Number   |
General Information |
Reference |
|---|
    2.4.1.18 | evolution |
Cyanobacterium sp. NBRC 102756 belongs to the cyanobacteria that accumulate water-insoluble alpha-glucan similar to amylopectin rather than glycogen, the latter of which is more commonly produced in these organisms. The amylopectin-producing species invariably have three branching enzyme (BE) homologues, BE1, BE2, and BE3, all belonging to the glycoside hydrolase family 13, GH13, phylogenetic tree. The specific activity of BE3 is much lower than those of BE1 and BE2. Isozymes BE1 and BE2 show similar chain-length preference to BEIIb isoform of Oryza sativa, while the catalytic specificity of BE3 is similar to that of Oryza sativa BEI. These results indicate that starch-producing cyanobacteria have both type-I BE (BE3) and type-II BEs (BE1 and BE2) in terms of chain-length preferences, as is the case of plants |
-, 735716 |
| 2.4.1.18 | evolution |
Cyanobacterium sp. NBRC 102756 belongs to the cyanobacteria that accumulate water-insoluble alpha-glucan similar to amylopectin rather than glycogen, the latter ofwhich is more commonly produced in these organisms. The amylopectin-producing species invariably have three branching enzyme (BE) homologues, BE1, BE2, and BE3, all belonging to the glycoside hydrolase family 13, GH13, phylogenetic tree. The specific activity of BE3 is much lower than those of BE1 and BE2. Isozymes BE1 and BE2 show similar chain-length preference to BEIIb isoform of Oryza sativa, while the catalytic specificity of BE3 is similar to that of Oryza sativa BEI. These results indicate that starch-producing cyanobacteria have both type-I BE (BE3) and type-II BEs (BE1 and BE2) in terms of chain-length preferences, as is the case of plants |
-, 735716 |
| 2.4.1.18 | evolution |
great variation exists as to the preference of branching enzymes of diffeent species for their acceptor chain, either A-chain or B-chain. Phylogenetic tree of alpha-glucan branching enzymes |
-, 735559 |
| 2.4.1.18 | evolution |
great variation exists as to the preference of branching enzymes of different species for their acceptor chain, either A-chain or B-chain. Phylogenetic tree of alpha-glucan branching enzymes |
735559 |
| 2.4.1.18 | evolution |
the branching enzyme is an unusual member of the alpha-amylase family because it has both alpha-1,4-amylase activity and alpha-1,6-transferase activity |
735689 |
| 2.4.1.18 | evolution |
the enzyme belongs to the glycoside hydrolase family 13, GH13. Phylogenetic analysis groups VvGBE with other Vibrio GBEs and closely related to GBEs of enteric bacteria. VvGBE and Escherichia coli GBE are type I bacterial GBEs and share 57% sequence similarity |
736108 |
| 2.4.1.18 | evolution |
the enzyme belongs to the glycoside hydrolase family GH13 |
719000 |
| 2.4.1.18 | malfunction |
enzyme mutations cause porphyria |
757750 |
| 2.4.1.18 | malfunction |
inhibitory effects of these hpSBEIIRNA constructs on the expression of SBEIIa and SBEIIb in maize endosperm, levels of ZmSBEII transcription and SBE activity in kernels of transgenic plants, overview. The transgenic maize lines show increased content of amylopectin chains with high-molecular weight compared to decreased low-molecular weight chains |
737052 |
| 2.4.1.18 | malfunction |
mutations of conserved residues in binding sites I and VI have a debilitating effect on the activity of the enzyme |
735689 |
