Crystallization (Comment) | Organism |
---|---|
molecular replacement method using the coordinates of human sorbitol dehydrogenase, PDB ID 1PL8. Each monomer contains a bidomain architecture composed of a large catalytic domain of residues Ala5 through Val167, and residues Arg308 through Leu362, and a smaller cofactor-binding domain with residues Ala168 through Tyr307, with a large cleft separating the two domains | Neurospora crassa |
Protein Variants | Comment | Organism |
---|---|---|
D211S | strong decrease in activity | Neurospora crassa |
D211S/I212R | strong decrease in activity, increase in activity with cofactor NADP+ | Neurospora crassa |
D211S/I212R/D213N | strong decrease in activity, increase in activity with cofactor NADP+ | Neurospora crassa |
D211S/I212R/S348T | strong decrease in activity, increase in activity with cofactor NADP+ | Neurospora crassa |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.14 | - |
NAD+ | wild-type, pH 8.0, 25°C | Neurospora crassa | |
0.48 | - |
NADP+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
0.55 | - |
NADP+ | mutant D211S/I212R/S348T, pH 8.0, 25°C | Neurospora crassa | |
1.45 | - |
NADP+ | mutant D211S/I212R/D213N, pH 8.0, 25°C | Neurospora crassa | |
2.9 | - |
NAD+ | mutant D211S, pH 8.0, 25°C | Neurospora crassa | |
3.6 | - |
NAD+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
5 | - |
NADP+ | or above, mutant D211S, pH 8.0, 25°C | Neurospora crassa | |
5 | - |
NAD+ | or above, mutant D211S/I212R/D213N, pH 8.0, 25°C | Neurospora crassa | |
5 | - |
NAD+ | or above, mutant D211S/I212R/S348T, pH 8.0, 25°C | Neurospora crassa | |
8 | - |
NADP+ | or above, wild-type, pH 8.0, 25°C | Neurospora crassa |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Zn2+ | a structural zinc ion is situated at a loop region located adjacent to the catalytic domain, where it is ligated by enzyme residues Cys108, Cys111, Cys114, and Cys122. The catalytically requisite zinc ion constitutes the second metal found in each monomer of LAD. This metal is coordinated by residues Cys53, His78, and Glu79, with a water molecule completing a near-tetrahedral coordination sphere | Neurospora crassa |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Neurospora crassa | Q7SI09 | - |
- |
Purification (Comment) | Organism |
---|---|
- |
Neurospora crassa |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
adonitol + NAD+ | - |
Neurospora crassa | ? + NADH + H+ | - |
? | |
L-arabinitol + NAD+ | - |
Neurospora crassa | L-xylulose + NADH + H+ | - |
? | |
L-arabinitol + NADP+ | no activity with cofactor NADP+ for wild-type | Neurospora crassa | L-xylulose + NADPH + H+ | - |
? | |
additional information | no substrate: D-arabinitol. The promiscuity of LAD towards different substrates is restricted to five-carbon sugars, and no activity is observed towards either D-sorbitol or D-mannitol | Neurospora crassa | ? | - |
? | |
xylitol + NAD+ | - |
Neurospora crassa | D-xylulose + NADH + H+ | - |
? |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
3.18 | - |
NAD+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
8.23 | - |
NADP+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
8.58 | - |
NAD+ | mutant D211S, pH 8.0, 25°C | Neurospora crassa | |
10.83 | - |
NAD+ | wild-type, pH 8.0, 25°C | Neurospora crassa | |
11.9 | - |
NADP+ | mutant D211S/I212R/D213N, pH 8.0, 25°C | Neurospora crassa | |
20.16 | - |
NADP+ | mutant D211S/I212R/S348T, pH 8.0, 25°C | Neurospora crassa |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NAD+ | electron density corresponding to the bound NAD+ cofactor is observed within the smaller nucleotide-binding domain, along a crevice between the two domains. The adenine ring is nestled in a shallow pocket created by numerous hydrophobic residues, including Ile212, Val232, Thr260, and Val262. The nicotinamide is adjacent to the catalytic zinc ion, where it is poised for hydride transfer to the C2 atom of the substrate | Neurospora crassa |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.88 | - |
NAD+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
2.92 | - |
NAD+ | mutant D211S, pH 8.0, 25°C | Neurospora crassa | |
8.27 | - |
NADP+ | mutant D211S/I212R/D213N, pH 8.0, 25°C | Neurospora crassa | |
17.17 | - |
NADP+ | mutant D211S/I212R, pH 8.0, 25°C | Neurospora crassa | |
36.6 | - |
NADP+ | mutant D211S/I212R/S348T, pH 8.0, 25°C | Neurospora crassa | |
79 | - |
NAD+ | wild-type, pH 8.0, 25°C | Neurospora crassa |