Crystallization (Comment) | Organism |
---|---|
crystal structure of the dimeric XPRTase-GMP complex was determined to 2.05 A resolution | Bacillus subtilis |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
GMP | competitive against 5-phospho-alpha-D-ribose 1-diphosphate | Bacillus subtilis | |
Pyrophosphate | noncompetitive | Bacillus subtilis | |
XMP | competitive against 5-phospho-alpha-D-ribose 1-diphosphate | Bacillus subtilis |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0022 | - |
xanthine | - |
Bacillus subtilis | |
0.03 | - |
5-phospho-alpha-D-ribose 1-diphosphate | cosubstrate: xanthine | Bacillus subtilis | |
0.281 | - |
guanine | - |
Bacillus subtilis | |
1.25 | - |
hypoxanthine | - |
Bacillus subtilis |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Bacillus subtilis | P42085 | - |
- |
Purification (Comment) | Organism |
---|---|
purification and formation of nucleotide free, GMP and XMP saturated complexes | Bacillus subtilis |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
5-phospho-alpha-D-ribose 1-diphosphate + guanine | - |
Bacillus subtilis | GMP + diphosphate | - |
? | |
5-phospho-alpha-D-ribose 1-diphosphate + hypoxanthine | - |
Bacillus subtilis | IMP + diphosphate | - |
? | |
5-phospho-alpha-D-ribose 1-diphosphate + xanthine | in a sequential reaction mechanism XPRTase binds first 5-phospho-alpha-D-ribose 1-diphosphate, stabilizing its active dimeric form, and subsequently xanthine | Bacillus subtilis | 9-(5-phospho-beta-D-ribosyl)xanthine + diphosphate | - |
? |
Synonyms | Comment | Organism |
---|---|---|
XPRTase | - |
Bacillus subtilis |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.03 | - |
guanine | - |
Bacillus subtilis | |
0.5 | - |
hypoxanthine | - |
Bacillus subtilis | |
11 | - |
xanthine | - |
Bacillus subtilis |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8 | 8.5 | substrate: xanthine | Bacillus subtilis |
9.5 | - |
substrate: hypoxanthine | Bacillus subtilis |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.022 | - |
XMP | Kis | Bacillus subtilis | |
0.033 | - |
GMP | Kis | Bacillus subtilis |