Cloned (Comment) | Organism |
---|---|
gene iolG | Bacillus subtilis |
Crystallization (Comment) | Organism |
---|---|
purified wild-type BsIDH and K97V mutant in apo-, holo- and ternary complexes with inositol and inosose, mixing of 0.002 ml of protein solution containing 10mg/ml protein in 25 mM Tris pH 8.0, with 0.002 ml reservoir solution containing 0.1-0.2 M tri-sodium citrate, pH 5.4, and 1.6-2.9 M ammonium sulfate, for the holo-enzyme complexes with 0.1 M tri-sodium citrate pH 5.4, 2.6 M ammonium sulfate and either inositol or inosose at 4 mg/0.1 ml mother liquid, cryoprotection with 25% ethylene glycol, X-ray diffraction structure determination and analysis at 2.3 A resolution | Bacillus subtilis |
Protein Variants | Comment | Organism |
---|---|---|
K97V | site-directed mutagenesis, inactive mutant | Bacillus subtilis |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | Bacillus subtilis | the enzyme shows a broad substrate spectrum while remaining highly stereoselective. BsIDH is able to oxidize the mono-saccharides alpha-D-glucose and alpha-D-xylose but not beta-D-glucose, D-mannose and D-galactose | ? | - |
? | |
myo-inositol + NAD+ | Bacillus subtilis | the NAD+-dependent enzyme catalyses the oxidation of the axial hydroxyl group of myo-inositol to form scyllo-inosose | scyllo-inosose + NADH + H+ | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Bacillus subtilis | - |
gene iolG | - |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
myo-inositol + NAD+ = 2,4,6/3,5-pentahydroxycyclohexanone + NADH + H+ | Lys97, Asp172, and His176 are the catalytic triad involved in the catalytic mechanism, overview | Bacillus subtilis |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | the enzyme shows a broad substrate spectrum while remaining highly stereoselective. BsIDH is able to oxidize the mono-saccharides alpha-D-glucose and alpha-D-xylose but not beta-D-glucose, D-mannose and D-galactose | Bacillus subtilis | ? | - |
? | |
additional information | structure-function analysis, overview | Bacillus subtilis | ? | - |
? | |
myo-inositol + NAD+ | - |
Bacillus subtilis | scyllo-inosose + NADH + H+ | - |
? | |
myo-inositol + NAD+ | the NAD+-dependent enzyme catalyses the oxidation of the axial hydroxyl group of myo-inositol to form scyllo-inosose | Bacillus subtilis | scyllo-inosose + NADH + H+ | - |
? |
Subunits | Comment | Organism |
---|---|---|
tetramer | BsIDH is a tetramer, with an arrangement consisting of 2 long continuous beta-sheets, formed from all 4 monomers, in which the central 2 strands are crossed over to form the core of the tetramer. Each subunit in the tetramer consists of two domains, an N-terminal Rossmann fold domain containing the cofactor-binding site, and a C-terminal domain containing the inositol-binding site, structure-function analysis, overview | Bacillus subtilis |
Synonyms | Comment | Organism |
---|---|---|
BsIDH | - |
Bacillus subtilis |
inositol dehydrogenase | - |
Bacillus subtilis |
iolG | - |
Bacillus subtilis |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NAD+ | - |
Bacillus subtilis |
General Information | Comment | Organism |
---|---|---|
metabolism | inositol dehydrogenase is responsible for the first step in myo-inositol degradation | Bacillus subtilis |