Pyridoxine 5'-phosphate synthase
| Pyridoxine 5'-phosphate synthase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.6.99.2 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
In enzymology, a pyridoxine 5'-phosphate synthase (EC 2.6.99.2) is an enzyme that catalyzes the chemical reaction
- 1-deoxy-D-xylulose 5-phosphate + 3-amino-2-oxopropyl phosphate pyridoxine 5'-phosphate + phosphate + 2 H2O
Thus, the two substrates of this enzyme are 1-deoxy-D-xylulose 5-phosphate and 3-amino-2-oxopropyl phosphate, whereas its 3 products are pyridoxine 5'-phosphate, phosphate, and H2O.
Classification
This enzyme belongs to the family of transferases, specifically those transferring nitrogenous groups transferring other nitrogenous groups.
Nomenclature
The systematic name of this enzyme class is 1-deoxy-D-xylulose-5-phosphate:3-amino-2-oxopropyl phosphate 3-amino-2-oxopropyltransferase (phosphate-hydrolysing; cyclizing). Other names in common use include pyridoxine 5-phosphate phospho lyase, PNP synthase, and PdxJ.
Biological role
This enzyme participates in vitamin B6 metabolism.
References
- Garrido-Franco M (2003). "Pyridoxine 5'-phosphate synthase: de novo synthesis of vitamin B6 and beyond". Biochim. Biophys. Acta. 1647 (1–2): 92&ndash, 7. doi:10.1016/s1570-9639(03)00065-7. PMID 12686115.
- Garrido-Franco M, Laber B, Huber R, Clausen T (2002). "Enzyme-ligand complexes of pyridoxine 5'-phosphate synthase: implications for substrate binding and catalysis". J. Mol. Biol. 321 (4): 601&ndash, 12. doi:10.1016/S0022-2836(02)00695-2. PMID 12206776.
- Laber B, Maurer W, Scharf S, Stepusin K, Schmidt FS (1999). "Vitamin B6 biosynthesis: formation of pyridoxine 5'-phosphate from 4-(phosphohydroxy)-L-threonine and 1-deoxy-D-xylulose-5-phosphate by PdxA and PdxJ protein". FEBS Lett. 449 (1): 45&ndash, 8. doi:10.1016/S0014-5793(99)00393-2. PMID 10225425.
- Franco MG, Laber B, Huber R, Clausen T (2001). "Structural basis for the function of pyridoxine 5'-phosphate synthase". Structure. 9 (3): 245&ndash, 53. doi:10.1016/S0969-2126(01)00584-6. PMID 11286891.