In enzymology, a saccharopine dehydrogenase (NAD+, L-lysine-forming) (EC 1.5.1.7) is an enzyme that catalyzes the chemical reaction
| saccharopine dehydrogenase (NAD+, L-lysine-forming) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Saccharopine dehydrogenase (L-lysine-forming) homodimer, Saccharomyces cerevisiae | |||||||||
| Identifiers | |||||||||
| EC no. | 1.5.1.7 | ||||||||
| CAS no. | 9073-96-5 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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- N6-(L-1,3-dicarboxypropyl)-L-lysine + NAD+ + H2O L-lysine + 2-oxoglutarate + NADH + H+
The 3 substrates of this enzyme are N6-(L-1,3-dicarboxypropyl)-L-lysine, NAD+, and H2O, whereas its 4 products are L-lysine, 2-oxoglutarate, NADH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is N6-(L-1,3-dicarboxypropyl)-L-lysine:NAD+ oxidoreductase (L-lysine-forming). Other names in common use include lysine-2-oxoglutarate reductase, dehydrogenase, saccharopine (nicotinamide adenine dinucleotide,, lysine forming), epsilon-N-(L-glutaryl-2)-L-lysine:NAD oxidoreductase (L-lysine, forming), N6-(glutar-2-yl)-L-lysine:NAD oxidoreductase (L-lysine-forming), 6-N-(L-1,3-dicarboxypropyl)-L-lysine:NAD+ oxidoreductase, and (L-lysine-forming). This enzyme participates in lysine biosynthesis and lysine degradation.
Structural studies
editAs of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1FF9.
References
edit- Fujioka M, Nakatani Y (1972). "Saccharopine dehydrogenase. Interaction with substrate analogues". Eur. J. Biochem. 25 (2): 301–7. doi:10.1111/j.1432-1033.1972.tb01697.x. PMID 4339117.
- Saunders PP, Broquist HP (1966). "Saccharopine, an intermediate of the aminoadipic acid pathway of lysine biosynthesis. IV. Saccharopine dehydrogenase". J. Biol. Chem. 241 (14): 3435–40. doi:10.1016/S0021-9258(18)96483-5. PMID 4287986.
