Cloned (Comment) | Organism |
---|---|
in Escherichia coli with plasmid pet28a | Aquifex aeolicus |
Crystallization (Comment) | Organism |
---|---|
data reading at -173°C | Aquifex aeolicus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0000066 | - |
phosphoenolpyruvate | same enzyme preparation as before, substitution with 5 microM Cu2+, pH 5.0, 40°C | Aquifex aeolicus | |
0.00004 | - |
phosphoenolpyruvate | independently prepared enzyme, substitution with 50 microM Cd2+, pH 5.0, 40°C | Aquifex aeolicus | |
0.00014 | - |
phosphoenolpyruvate | same enzyme preparation as following, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00015 | - |
phosphoenolpyruvate | same enzyme preparation as following, substitution with 5 microM Cu2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00016 | - |
phosphoenolpyruvate | independently prepared enzyme, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00016 | - |
phosphoenolpyruvate | recombinant enzyme produced in Escherichia coli, native Zn2+ and Fe2+ not substituted, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00028 | - |
phosphoenolpyruvate | same enzyme preparation as following, substitution with 50 microM Zn2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.0005 | - |
D-arabinose 5-phosphate | same enzyme preparation as following, substitution with 50 microM Zn2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00123 | - |
D-arabinose 5-phosphate | recombinant enzyme produced in Escherichia coli, native Zn2+ and Fe2+ not substituted, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00156 | - |
D-arabinose 5-phosphate | same enzyme preparation as following, substitution with 5 microM Cu2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.002 | - |
D-arabinose 5-phosphate | same enzyme preparation as following, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.00227 | - |
D-arabinose 5-phosphate | independently prepared enzyme, substitution with 50 microM Cd2+, pH 5.0, 40°C | Aquifex aeolicus | |
0.00318 | - |
D-arabinose 5-phosphate | independently prepared enzyme, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.01926 | - |
D-arabinose 5-phosphate | same enzyme preparation as before, substitution with 5 microM Cu2+, pH 5.0, 40°C | Aquifex aeolicus |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Cd2+ | second in enzyme activity, square pyramidal delocalized electronic structure computed with quantum mechanics/molecular mechanics geometry optimization | Aquifex aeolicus | |
Cu2+ | third in enzyme activity, octahedral or distorted tetrahedral delocalized electronic structure computed with quantum mechanics/molecular mechanics geometry optimization, product is bound in its linear conformation in the crystal structure of the enzyme with Cu2+, greenish color of enzyme, new absorption peak at 380 nm instead of 505 nm | Aquifex aeolicus | |
Fe2+ | unsubstituted enzyme with lowest enzyme activity | Aquifex aeolicus | |
additional information | the type of metal bound in the active site affects the behavior of the enzyme in vivo and the rate of product release in the crystal environment | Aquifex aeolicus | |
Zn2+ | highest enzyme activity, square pyramidal delocalized electronic structure computed with quantum mechanics/molecular mechanics geometry optimization | Aquifex aeolicus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
phosphoenolpyruvate + D-arabinose 5-phosphate + H2O | Aquifex aeolicus | - |
2-dehydro-3-deoxy-D-octonate 8-phosphate + phosphate | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Aquifex aeolicus | O66496 | - |
- |
Purification (Comment) | Organism |
---|---|
enzyme purification followed by incubation with 50 microM Cd2+, Zn2+, or Cu2+ in 20 mM Tris-HCl buffer, pH 7.5, to substitute the metal ions Fe2+ or Co2+ | Aquifex aeolicus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
phosphoenolpyruvate + D-arabinose 5-phosphate + H2O | - |
Aquifex aeolicus | 2-dehydro-3-deoxy-D-octonate 8-phosphate + phosphate | - |
? |
Synonyms | Comment | Organism |
---|---|---|
3-deoxy-D-manno-octulosonate 8-phosphate synthase | - |
Aquifex aeolicus |
Kdo8P synthase | - |
Aquifex aeolicus |
KDO8PS | - |
Aquifex aeolicus |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.31 | - |
phosphoenolpyruvate | recombinant enzyme produced in Escherichia coli, native Zn2+ and Fe2+ not substituted, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.34 | - |
phosphoenolpyruvate | enzyme preparation 1, substitution with 5 microM Cu2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.36 | - |
phosphoenolpyruvate | enzyme preparation 1, substitution with 5 microM Cu2+, pH 5.0, 40°C | Aquifex aeolicus | |
0.41 | - |
phosphoenolpyruvate | enzyme preparation 1, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.46 | - |
phosphoenolpyruvate | independent enzyme preparation 2, substitution with 50 microM Cd2+, pH 5.0, 40°C | Aquifex aeolicus | |
0.47 | - |
phosphoenolpyruvate | enzyme preparation 1, substitution with 50 microM Zn2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus | |
0.48 | - |
phosphoenolpyruvate | independent preparation 2 enzyme, substitution with 50 microM Cd2+, 100 mM Tris-acetate, pH 7.5, 40°C | Aquifex aeolicus |
General Information | Comment | Organism |
---|---|---|
metabolism | catalyzes the formation of 3-deoxy-D-manno-octulosonate 8-phosphate (KDO8P), a key precursor in the biosynthesis of the endotoxin of Gram-negative bacteria | Aquifex aeolicus |