Application | Comment | Organism |
---|---|---|
pharmacology | the enzyme is a target for the antitubercular drug isoniazid. InhA inhibitors targeted at the enoyl substrate binding site may be effective against existing isoniazid-resistant strains of Mycobacterium tuberculosis | Mycobacterium tuberculosis |
Protein Variants | Comment | Organism |
---|---|---|
A124V | mutantion results in resistance of Mycobacterium smegmatis to triclosan and significantly reduced affinity of the enzyme for triclosan | Mycolicibacterium smegmatis |
I21V | InhA mutation that occur in isoniazid-resistant clinical isolates of Mycobacterium tuberculosis, show unimpaired inhibition by triclosan, with uncompetitive inhibition constant | Mycobacterium tuberculosis |
I47T | InhA mutation that occur in isoniazid-resistant clinical isolates of Mycobacterium tuberculosis, show unimpaired inhibition by triclosan, with uncompetitive inhibition constant | Mycobacterium tuberculosis |
M161V | mutantion results in resistance of Mycobacterium smegmatis to triclosan and significantly reduced affinity of the enzyme for triclosan | Mycolicibacterium smegmatis |
Y158F | mutation reduces the affinity of triclosan for the enzyme and results in noncompetitive inhibition | Mycobacterium tuberculosis |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
isoniazid | - |
Mycobacterium tuberculosis | |
isoniazid | - |
Mycolicibacterium smegmatis | |
triclosan | binding of triclosan to wild-type InhA is uncompetitive with respect to both NADH and trans-2-dodecenoyl-CoA. Replacement of Y158, the catalytic tyrosine residue, with Phe, reduces the affinity of triclosan for the enzyme and results in noncompetitive inhibition. I47T and I21V, two InhA mutations that occur in isoniazid-resistant clinical isolates of Mycobacterium tuberculosis, show unimpaired inhibition by triclosan, with uncompetitive inhibition constants | Mycobacterium tuberculosis | |
triclosan | - |
Mycolicibacterium smegmatis |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.002 | - |
NADH | pH 6.8, 25°C, mutant enzyme Y158F | Mycobacterium tuberculosis | |
0.01 | - |
trans-2-hexadecenoyl-CoA | pH 6.8, 25°C, mutant enzyme M161V | Mycolicibacterium smegmatis | |
0.036 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I47T | Mycobacterium tuberculosis | |
0.046 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, wild-type enzyme | Mycobacterium tuberculosis | |
0.066 | - |
NADH | pH 6.8, 25°C, wild-type enzyme | Mycobacterium tuberculosis | |
0.07 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I21V | Mycobacterium tuberculosis | |
0.07 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme Y158F | Mycobacterium tuberculosis | |
0.072 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme A124V | Mycolicibacterium smegmatis | |
0.104 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme S94A | Mycobacterium tuberculosis | |
0.12 | - |
NADH | pH 6.8, 25°C, mutant enzyme I21V | Mycobacterium tuberculosis | |
0.142 | - |
NADH | pH 6.8, 25°C, mutant enzyme A124V | Mycolicibacterium smegmatis | |
0.152 | - |
NADH | pH 6.8, 25°C, mutant enzyme I47T | Mycobacterium tuberculosis | |
0.25 | - |
NADH | pH 6.8, 25°C, mutant enzyme S94A | Mycobacterium tuberculosis | |
0.332 | - |
trans-2-hexadecenoyl-CoA | pH 6.8, 25°C, mutant enzyme M161V | Mycolicibacterium smegmatis |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Mycobacterium tuberculosis | P9WGR1 | - |
- |
Mycobacterium tuberculosis ATCC 25618 | P9WGR1 | - |
- |
Mycolicibacterium smegmatis | P42829 | - |
- |
Mycolicibacterium smegmatis ATCC 700084 | P42829 | - |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
trans-2-dodecenoyl-CoA + NADH + H+ | - |
Mycobacterium tuberculosis | dodecanoyl-CoA + NAD+ | - |
? | |
trans-2-dodecenoyl-CoA + NADH + H+ | - |
Mycolicibacterium smegmatis | dodecanoyl-CoA + NAD+ | - |
? | |
trans-2-dodecenoyl-CoA + NADH + H+ | - |
Mycolicibacterium smegmatis ATCC 700084 | dodecanoyl-CoA + NAD+ | - |
? | |
trans-2-dodecenoyl-CoA + NADH + H+ | - |
Mycobacterium tuberculosis ATCC 25618 | dodecanoyl-CoA + NAD+ | - |
? | |
trans-2-hexadecenoyl-CoA + NADH + H+ | - |
Mycobacterium tuberculosis | hexadecanoyl-CoA + NAD+ | - |
? | |
trans-2-hexadecenoyl-CoA + NADH + H+ | - |
Mycolicibacterium smegmatis | hexadecanoyl-CoA + NAD+ | - |
? | |
trans-2-hexadecenoyl-CoA + NADH + H+ | - |
Mycolicibacterium smegmatis ATCC 700084 | hexadecanoyl-CoA + NAD+ | - |
? | |
trans-2-hexadecenoyl-CoA + NADH + H+ | - |
Mycobacterium tuberculosis ATCC 25618 | hexadecanoyl-CoA + NAD+ | - |
? |
Synonyms | Comment | Organism |
---|---|---|
InhA | - |
Mycobacterium tuberculosis |
InhA | - |
Mycolicibacterium smegmatis |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
25 | - |
assay at | Mycobacterium tuberculosis |
25 | - |
assay at | Mycolicibacterium smegmatis |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.35 | - |
NADH | pH 6.8, 25°C, mutant enzyme Y158F | Mycobacterium tuberculosis | |
0.35 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme Y158F | Mycobacterium tuberculosis | |
8.35 | - |
NADH | pH 6.8, 25°C, wild-type enzyme | Mycobacterium tuberculosis | |
8.35 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, wild-type enzyme | Mycobacterium tuberculosis | |
11.7 | - |
trans-2-hexadecenoyl-CoA | pH 6.8, 25°C, mutant enzyme M161V | Mycolicibacterium smegmatis | |
12 | - |
NADH | pH 6.8, 25°C, mutant enzyme I47T | Mycobacterium tuberculosis | |
12 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I47T | Mycobacterium tuberculosis | |
14.35 | - |
NADH | pH 6.8, 25°C, mutant enzyme A124V | Mycolicibacterium smegmatis | |
14.35 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme A124V | Mycolicibacterium smegmatis | |
15.4 | - |
NADH | pH 6.8, 25°C, mutant enzyme I21V | Mycobacterium tuberculosis | |
15.4 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I21V | Mycobacterium tuberculosis | |
16.55 | - |
NADH | pH 6.8, 25°C, mutant enzyme S94A | Mycobacterium tuberculosis | |
16.55 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme S94A | Mycobacterium tuberculosis |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
6.8 | - |
assay at | Mycobacterium tuberculosis |
6.8 | - |
assay at | Mycolicibacterium smegmatis |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0044 | - |
triclosan | mutant enzyme M161V, pH 6.8, 25°C | Mycolicibacterium smegmatis | |
0.036 | - |
triclosan | mutant enzyme Y158F, pH 6.8, 25°C | Mycobacterium tuberculosis |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
5 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme Y158F | Mycobacterium tuberculosis | |
148.3 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme S94A | Mycobacterium tuberculosis | |
181.52 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, wild-type enzyme | Mycobacterium tuberculosis | |
198.3 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme A124V | Mycolicibacterium smegmatis | |
220 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I21V | Mycobacterium tuberculosis | |
333.3 | - |
trans-2-dodecenoyl-CoA | pH 6.8, 25°C, mutant enzyme I47T | Mycobacterium tuberculosis | |
1166.7 | - |
trans-2-hexadecenoyl-CoA | pH 6.8, 25°C, mutant enzyme M161V | Mycolicibacterium smegmatis |