The Enzyme Database

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EC 1.5.1.7     
Accepted name: saccharopine dehydrogenase (NAD+, L-lysine-forming)
Reaction: N6-(L-1,3-dicarboxypropyl)-L-lysine + NAD+ + H2O = L-lysine + 2-oxoglutarate + NADH + H+
For diagram of lysine catabolism, click here and for diagram of L-lysine synthesis, click here
Glossary: L-saccharopine = N6-(L-1,3-dicarboxypropyl)-L-lysine
Other name(s): lysine-2-oxoglutarate reductase; dehydrogenase, saccharopine (nicotinamide adenine dinucleotide, lysine forming); ε-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 (L-lysine-forming)
Systematic name: N6-(L-1,3-dicarboxypropyl)-L-lysine:NAD+ oxidoreductase (L-lysine-forming)
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9073-96-5
References:
1.  Fujioka, M. and Nakatani, Y. Saccharopine dehydrogenase. Interaction with substrate analogues. Eur. J. Biochem. 25 (1972) 301–307. [DOI] [PMID: 4339117]
2.  Saunders, P.P. and Broquist, H.P. Saccharopine, an intermediate of the aminoadipic acid pathway of lysine biosynthesis. IV. Saccharopine dehydrogenase. J. Biol. Chem. 241 (1966) 3435–3440. [PMID: 4287986]
[EC 1.5.1.7 created 1972]
 
 
EC 1.5.1.8     
Accepted name: saccharopine dehydrogenase (NADP+, L-lysine-forming)
Reaction: N6-(L-1,3-dicarboxypropyl)-L-lysine + NADP+ + H2O = L-lysine + 2-oxoglutarate + NADPH + H+
Glossary: L-saccharopine = N6-(L-1,3-dicarboxypropyl)-L-lysine
Other name(s): lysine-2-oxoglutarate reductase; lysine-ketoglutarate reductase; L-lysine-α-ketoglutarate reductase; lysine:α-ketoglutarate:TPNH oxidoreductase (ε-N-[gultaryl-2]-L-lysine forming); saccharopine (nicotinamide adenine dinucleotide phosphate, lysine-forming) dehydrogenase; 6-N-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming)
Systematic name: N6-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming)
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 9031-19-0
References:
1.  Hutzler, J. and Dancis, J. Conversion of lysine to saccharopine by human tissues. Biochim. Biophys. Acta 158 (1968) 62–69. [DOI] [PMID: 4385118]
2.  Markovitz, P.J., Chuang, D.T. and Cox, R.P. Familial hyperlysinemias. Purification and characterization of the bifunctional aminoadipic semialdehyde synthase with lysine-ketoglutarate reductase and saccharopine dehydrogenase activities. J. Biol. Chem. 259 (1984) 11643–11646. [PMID: 6434529]
[EC 1.5.1.8 created 1972]
 
 
EC 1.5.1.9     
Accepted name: saccharopine dehydrogenase (NAD+, L-glutamate-forming)
Reaction: N6-(L-1,3-dicarboxypropyl)-L-lysine + NAD+ + H2O = L-glutamate + (S)-2-amino-6-oxohexanoate + NADH + H+
Glossary: saccharopine = N6-(L-1,3-dicarboxypropyl)-L-lysine
(S)-2-amino-6-oxohexanoate = L-2-aminoadipate 6-semialdehyde = L-allysine
Other name(s): dehydrogenase, saccharopine (nicotinamide adenine dinucleotide, glutamate-forming); saccharopin dehydrogenase; NAD+ oxidoreductase (L-2-aminoadipic-δ-semialdehyde and glutamate forming); aminoadipic semialdehyde synthase; 6-N-(L-1,3-dicarboxypropyl)-L-lysine:NAD+ oxidoreductase (L-glutamate-forming)
Systematic name: N6-(L-1,3-dicarboxypropyl)-L-lysine:NAD+ oxidoreductase (L-glutamate-forming)
Comments: The activities of this enzyme along with EC 1.5.1.8, saccharopine dehydrogenase (NADP+, L-lysine-forming), occur on a single protein.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 37256-26-1
References:
1.  Hutzler, J. and Dancis, J. Conversion of lysine to saccharopine by human tissues. Biochim. Biophys. Acta 158 (1968) 62–69. [DOI] [PMID: 4385118]
2.  Markovitz, P.J., Chuang, D.T. and Cox, R.P. Familial hyperlysinemias. Purification and characterization of the bifunctional aminoadipic semialdehyde synthase with lysine-ketoglutarate reductase and saccharopine dehydrogenase activities. J. Biol. Chem. 259 (1984) 11643–11646. [PMID: 6434529]
[EC 1.5.1.9 created 1972, modified 2011]
 
 
EC 1.5.1.10     
Accepted name: saccharopine dehydrogenase (NADP+, L-glutamate-forming)
Reaction: N6-(L-1,3-dicarboxypropyl)-L-lysine + NADP+ + H2O = L-glutamate + (S)-2-amino-6-oxohexanoate + NADPH + H+
Glossary: L-saccharopine = N6-(L-1,3-dicarboxypropyl)-L-lysine
(S)-2-amino-6-oxohexanoate = L-2-aminoadipate 6-semialdehyde = L-allysine
Other name(s): saccharopine (nicotinamide adenine dinucleotide phosphate, glutamate-forming) dehydrogenase; aminoadipic semialdehyde-glutamic reductase; aminoadipate semialdehyde-glutamate reductase; aminoadipic semialdehyde-glutamate reductase; ε-N-(L-glutaryl-2)-L-lysine:NAD+(P) oxidoreductase (L-2-aminoadipate-semialdehyde forming); saccharopine reductase; 6-N-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-glutamate-forming)
Systematic name: N6-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-glutamate-forming)
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9033-55-0
References:
1.  Jones, E.E. and Broquist, H.P. Saccharopine, an intermediate of the aminoadipic acid pathway of lysine biosynthesis. 3. Aminoadipic semialdehyde-glutamate reductase. J. Biol. Chem. 241 (1966) 3430–3434. [PMID: 4380448]
[EC 1.5.1.10 created 1972, modified 2011]
 
 
EC 1.5.3.18     
Accepted name: L-saccharopine oxidase
Reaction: N6-(L-1,3-dicarboxypropyl)-L-lysine + H2O + O2 = (S)-2-amino-6-oxohexanoate + L-glutamate + H2O2
Glossary: L-saccharopine = N6-(L-1,3-dicarboxypropyl)-L-lysine
(S)-2-amino-6-oxohexanoate = L-2-aminoadipate 6-semialdehyde = L-allysine
Other name(s): FAP2
Systematic name: L-saccharopine:oxygen oxidoreductase (L-glutamate forming)
Comments: The enzyme is involved in pipecolic acid biosynthesis. A flavoprotein (FAD).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Yoshida, N., Akazawa, S., Katsuragi, T. and Tani, Y. Characterization of two fructosyl-amino acid oxidase homologs of Schizosaccharomyces pombe. J. Biosci. Bioeng. 97 (2004) 278–280. [DOI] [PMID: 16233628]
2.  Wickwire, B.M., Wagner, C. and Broquist, H.P. Pipecolic acid biosynthesis in Rhizoctonia leguminicola. II. Saccharopine oxidase: a unique flavin enzyme involved in pipecolic acid biosynthesis. J. Biol. Chem. 265 (1990) 14748–14753. [PMID: 2394693]
[EC 1.5.3.18 created 2011]
 
 


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