Cloned (Comment) | Organism |
---|---|
expressed in Escherichia coli BL21 cells | Staphylococcus aureus |
expression in Escherichia coli BL21 cells | Staphylococcus aureus |
Crystallization (Comment) | Organism |
---|---|
crystal structures of the enzyme in complex with two transition state analogues, cyclopropane-1,1-dicarboxylate and N-isopropyloxalyl hydroxamate. Hanging-drop vapor-diffusion method | Staphylococcus aureus |
hanging-drop vapor-diffusion method. Crystal structures of Staphylococcus aureus KARI in complex with two transition state analogues, cyclopropane-1,1-dicarboxylate and N-isopropyloxalyl hydroxamate | Staphylococcus aureus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
cyclopropane-1,1-dicarboxylate | binds in a competitively and in multi-dentate manner to the enzyme; the compounds bind competitively and in multi-dentate manner to the enzyme | Staphylococcus aureus | |
N-isopropyloxalyl hydroxamate | binds slowly to the enzyme, binds in a competitively and in multi-dentate manner to the enzyme. The observation that the inhibitor is processed to its deoxygenated form in crystallo provides an alternative explanation for the relatively weak herbicidal/antimicrobial activity affordsed by N-isopropyloxalyl hydroxamate despite its low Ki value; the compounds bind competitively and in multi-dentate manner to the enzyme. Binds slowly to the enzyme. Intact N-isopropyloxalyl hydroxamate is present in only 25% of binding sites, whereas its deoxygenated form is present in the remaining sites. This deoxy form of N-isopropyloxalyl hydroxamate binds rapidly to the enzyme, but with much weaker affinity (Ki: 0.021 mM) | Staphylococcus aureus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.285 | - |
(S)-2-acetolactate | pH 8.0, 25°C | Staphylococcus aureus | |
0.285 | - |
(2S)-2-acetolactate | pH 8.0, 25°C | Staphylococcus aureus |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | Mg2+-dependent enzyme | Staphylococcus aureus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
(S)-2-acetolactate + NADPH + H+ | Staphylococcus aureus | - |
(2R)-2,3-dihydroxy-3-methylbutanoate + NADP+ | - |
? | |
(S)-2-acetolactate + NADPH + H+ | Staphylococcus aureus NCTC 8325 | - |
(2R)-2,3-dihydroxy-3-methylbutanoate + NADP+ | - |
? | |
2-acetolactate + NADPH + H+ | Staphylococcus aureus | - |
3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? | |
2-acetolactate + NADPH + H+ | Staphylococcus aureus NCTC 8325 | - |
3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Staphylococcus aureus | Q2FWK4 | - |
- |
Staphylococcus aureus NCTC 8325 | Q2FWK4 | - |
- |
Purification (Comment) | Organism |
---|---|
- |
Staphylococcus aureus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
(2S)-2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus | 3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? | |
(2S)-2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus NCTC 8325 | 3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? | |
(S)-2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus | (2R)-2,3-dihydroxy-3-methylbutanoate + NADP+ | - |
? | |
(S)-2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus NCTC 8325 | (2R)-2,3-dihydroxy-3-methylbutanoate + NADP+ | - |
? | |
2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus | 3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? | |
2-acetolactate + NADPH + H+ | - |
Staphylococcus aureus NCTC 8325 | 3-hydroxy-3-methyl-2-oxobutyrate + NADP+ | - |
? |
Synonyms | Comment | Organism |
---|---|---|
KARI | - |
Staphylococcus aureus |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.00023 | - |
(S)-2-acetolactate | pH 8.0, 25°C | Staphylococcus aureus | |
0.00023 | - |
(2S)-2-acetolactate | pH 8.0, 25°C | Staphylococcus aureus |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NADPH | - |
Staphylococcus aureus |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0000079 | - |
N-isopropyloxalyl hydroxamate | pH 8.0, 25°C | Staphylococcus aureus | |
0.0000079 | - |
N-isopropyloxalyl hydroxamate | pH 8.0, 25°C, intact N-isopropyloxalyl hydroxamate is present in only 25% of binding sites, whereas its deoxygenated form is present in the remaining sites. This deoxy form of N-isopropyloxalyl hydroxamate binds rapidly to the enzyme, but with much weaker affinity (Ki: 0.021 mM) | Staphylococcus aureus | |
0.00273 | - |
cyclopropane-1,1-dicarboxylate | pH 8.0, 25°C | Staphylococcus aureus | |
0.00277 | - |
cyclopropane-1,1-dicarboxylate | pH 8.0, 25°C | Staphylococcus aureus |