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Literature summary extracted from
- Functional redundancy of steroid C26-monooxygenase activity in Mycobacterium tuberculosis revealed by biochemical and genetic analyses (2010), J. Biol. Chem., 285, 36352-36360.
Cloned(Commentary)
| EC Number | Cloned (Comment) | Organism |
|---|---|---|
| 1.14.15.28 | expressed in Escherichia coli | Mycobacterium tuberculosis |
| 1.14.15.29 | expressed in Escherichia coli | Mycobacterium tuberculosis |
KM Value [mM]
| EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|---|
| 1.14.15.28 | 0.0077 | - |
cholesterol | 21°C, pH 7.4 | Mycobacterium tuberculosis |  |
| 1.14.15.28 | 0.0118 | - |
cholest-4-en-3-one | 21°C, pH 7.4 | Mycobacterium tuberculosis | |
| 1.14.15.29 | 0.0107 | - |
cholesterol | pH and temperature not specified in the publication | Mycobacterium tuberculosis | |
| 1.14.15.29 | 0.0208 | - |
cholest-4-en-3-one | pH and temperature not specified in the publication | Mycobacterium tuberculosis | |
Natural Substrates/ Products (Substrates)
| EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis | the enzyme participates in cholesterol degradation | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis H37Rv | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis H37Rv | the enzyme participates in cholesterol degradation | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis CDC 1551 | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | Mycobacterium tuberculosis CDC 1551 | the enzyme participates in cholesterol degradation | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
Organism
| EC Number | Organism | UniProt | Comment | Textmining |
|---|---|---|---|---|
| 1.14.15.28 | Mycobacterium tuberculosis | - |
- |
- |
| 1.14.15.28 | Mycobacterium tuberculosis H37Rv | - |
- |
- |
| 1.14.15.29 | Mycobacterium tuberculosis | - |
- |
- |
| 1.14.15.29 | Mycobacterium tuberculosis CDC 1551 | - |
- |
- |
| 1.14.15.29 | Mycobacterium tuberculosis H37Rv | - |
- |
- |
Purification (Commentary)
| EC Number | Purification (Comment) | Organism |
|---|---|---|
| 1.14.15.28 | - |
Mycobacterium tuberculosis |
| 1.14.15.29 | - |
Mycobacterium tuberculosis |
Substrates and Products (Substrate)
| EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 1.14.15.28 | (25R)-26-hydroxycholest-4-en-3-one + reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | - |
Mycobacterium tuberculosis | (25R)-26-oxocholest-4-en-3-one + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
| 1.14.15.28 | (25R)-26-oxocholest-4-en-3-one + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | - |
Mycobacterium tuberculosis | (25R)-3-oxocholest-4-en-26-oate + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | Mycobacterium tuberculosis | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme participates in cholesterol degradation | Mycobacterium tuberculosis | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme catalyses the hydroxylation of the C-26 carbon, followed by oxidation of the alcohol to the carboxylic acid via the aldehyde intermediate, initiating the degradation of the alkyl side-chain of cholesterol. The products are exclusively in the (25R) conformation | Mycobacterium tuberculosis | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | Mycobacterium tuberculosis H37Rv | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme participates in cholesterol degradation | Mycobacterium tuberculosis H37Rv | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme catalyses the hydroxylation of the C-26 carbon, followed by oxidation of the alcohol to the carboxylic acid via the aldehyde intermediate, initiating the degradation of the alkyl side-chain of cholesterol. The products are exclusively in the (25R) conformation | Mycobacterium tuberculosis H37Rv | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | dominant P450 enzyme responsible for initiating steroid side chain degradation in Mycobacterium tuberculosis. It is suggested that cholest-4-en-3-one rather than cholesterol is the most relevant in vivo substrate | Mycobacterium tuberculosis CDC 1551 | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme participates in cholesterol degradation | Mycobacterium tuberculosis CDC 1551 | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholest-4-en-3-one + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | the enzyme catalyses the hydroxylation of the C-26 carbon, followed by oxidation of the alcohol to the carboxylic acid via the aldehyde intermediate, initiating the degradation of the alkyl side-chain of cholesterol. The products are exclusively in the (25R) conformation | Mycobacterium tuberculosis CDC 1551 | (25R)-3-oxocholest-4-en-26-oate + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.28 | cholesterol + 6 reduced [2Fe-2S] ferredoxin + 3 O2 | - |
Mycobacterium tuberculosis | 3beta-hydroxycholest-5-en-26-oic acid + 6 oxidized [2Fe-2S] ferredoxin + 4 H2O | - |
? | |
| 1.14.15.29 | cholest-4-en-3-one + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | - |
Mycobacterium tuberculosis | (25S)-26-hydroxycholest-4-en-3-one + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | CYP125A1 generates oxidized sterols of the (25S)-26-hydroxy configuration | ? | |
| 1.14.15.29 | cholest-4-en-3-one + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | - |
Mycobacterium tuberculosis H37Rv | (25S)-26-hydroxycholest-4-en-3-one + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | CYP125A1 generates oxidized sterols of the (25S)-26-hydroxy configuration | ? | |
| 1.14.15.29 | cholest-4-en-3-one + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | - |
Mycobacterium tuberculosis CDC 1551 | (25S)-26-hydroxycholest-4-en-3-one + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | CYP125A1 generates oxidized sterols of the (25S)-26-hydroxy configuration | ? | |
| 1.14.15.29 | cholesterol + reduced ferredoxin [iron-sulfur] cluster + O2 | - |
Mycobacterium tuberculosis | 26-hydroxycholesterol + oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
| 1.14.15.29 | cholesterol + reduced ferredoxin [iron-sulfur] cluster + O2 | - |
Mycobacterium tuberculosis H37Rv | 26-hydroxycholesterol + oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
| 1.14.15.29 | cholesterol + reduced ferredoxin [iron-sulfur] cluster + O2 | - |
Mycobacterium tuberculosis CDC 1551 | 26-hydroxycholesterol + oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
Synonyms
| EC Number | Synonyms | Comment | Organism |
|---|---|---|---|
| 1.14.15.28 | CYP142A1 | - |
Mycobacterium tuberculosis |
| 1.14.15.29 | CYP125A1 | - |
Mycobacterium tuberculosis |
| 1.14.15.29 | steroid C26-monooxygenase | - |
Mycobacterium tuberculosis |
Temperature Optimum [°C]
| EC Number | Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|---|
| 1.14.15.28 | 21 | - |
assay at | Mycobacterium tuberculosis |
Turnover Number [1/s]
| EC Number | Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|---|
| 1.14.15.28 | 0.278 | - |
cholesterol | 21°C, pH 7.4 | Mycobacterium tuberculosis | |
| 1.14.15.28 | 1.4 | - |
cholest-4-en-3-one | 21°C, pH 7.4 | Mycobacterium tuberculosis | |
| 1.14.15.29 | 0.47 | - |
cholesterol | pH and temperature not specified in the publication | Mycobacterium tuberculosis | |
| 1.14.15.29 | 2.92 | - |
cholest-4-en-3-one | pH and temperature not specified in the publication | Mycobacterium tuberculosis | |
Cofactor
| EC Number | Cofactor | Comment | Organism | Structure |
|---|---|---|---|---|
| 1.14.15.28 | cytochrome P450 | cytochrome P450-dependent monooxygenase | Mycobacterium tuberculosis | |
| 1.14.15.29 | NADH | - |
Mycobacterium tuberculosis | |
kcat/KM [mM/s]
| EC Number | kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|---|
| 1.14.15.28 | 36.1 | - |
cholesterol | 21°C, pH 7.4 | Mycobacterium tuberculosis | |
| 1.14.15.28 | 118.6 | - |
cholest-4-en-3-one | 21°C, pH 7.4 | Mycobacterium tuberculosis | |
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