Cloned (Comment) | Organism |
---|---|
gene ThaADH, recombinant expression of C-terminally StrepII-tagged in Escherichia coli strain BL21(DE3) | Thauera aromatica |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Zn2+ | zinc-dependent enzyme, the ADH enzymes have a Rossman fold motif containing two zinc atoms per subunit. The first zinc atom is directly involved in catalysis while the second is important for the overall structure of the enzyme | Thauera aromatica |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
6-hydroxycyclohex-1-ene-1-carbonyl-CoA + NAD+ | Thauera aromatica | - |
6-oxocyclohex-1-ene-1-carbonyl-CoA + NADH + H+ | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Thauera aromatica | - |
- |
- |
Purification (Comment) | Organism |
---|---|
recombinant enzyme from Escherichia coli strain BL21(DE3) by affinity chromatography | Thauera aromatica |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
1,2-cyclohexanedione + NADH + H+ | - |
Thauera aromatica | ? + NAD+ | - |
? | |
1,3-cyclopentanedione + NADH + H+ | - |
Thauera aromatica | ? + NAD+ | - |
? | |
6-hydroxycyclohex-1-ene-1-carbonyl-CoA + NAD+ | - |
Thauera aromatica | 6-oxocyclohex-1-ene-1-carbonyl-CoA + NADH + H+ | - |
? | |
additional information | the enzyme exhibits a substrate specificity with highest activities on cyclic alpha- and beta-diketones including 1,2-cyclohexanedione and 1,3-cyclopentanedione, enzyme activity with 1,2-cyclohexanedione, 1,3-cyclohexanedione, and 1,3-cyclopentanedione as well as with 2,3/pentanedione, ethyl pyruvate, and cyclohexanone, but ThaADH converts neither acetophenone nor benzaldehyde which are both preferred substrates of many known zinc-dependent ADHs. The enzyme actually prefers substrates with the reactive carbonyl function being located inside a cyclohexyl or cyclopentyl structure | Thauera aromatica | ? | - |
? |
Subunits | Comment | Organism |
---|---|---|
homodimer | 2 * 38000, SDS-PAGE | Thauera aromatica |
Synonyms | Comment | Organism |
---|---|---|
ThaADH | - |
Thauera aromatica |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
50 | - |
recombinant enzyme | Thauera aromatica |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
6 | - |
recombinant enzyme | Thauera aromatica |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
6 | 7 | recombinant enzyme, maximal activity at pH 6.0, 40% of maximal activity at pH 7.0, and 15% at pH 5.0, profile overview | Thauera aromatica |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NAD+ | specific for, no activity with NADP+ | Thauera aromatica |
General Information | Comment | Organism |
---|---|---|
evolution | the enzyme belongs to the zinc-dependent alcohol dehydrogenases (ADHs) | Thauera aromatica |
metabolism | the enzyme is involved in the benzoate degradation pathway | Thauera aromatica |
additional information | ThaADH three-dimensional structure modeling overview. A bulky aromatic residue, that plays a crucial role in the definition of the substrate binding pockets of most ADHs, is replaced by a glycine residue in ThaADH. This structural difference leads to the formation of one large binding pocket instead of two smaller ones and consequently to a preference for cyclic diketones over linear bulky substrates | Thauera aromatica |