Aspartate dehydrogenase

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Aspartate dehydrogenase
Identifiers
EC no. 1.4.1.21
CAS no. 37278-97-0
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
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PMC articles
PubMed articles
NCBI proteins

Aspartate dehydrogenase (EC 1.4.1.21) is an enzyme that catalyzes the chemical reaction

+ NAD+
 
 
H2O
H+
Aspartate dehydrogenase
H2O
H+
 
+ NADP + NH3
 

The three substrates of this enzyme are L-aspartic acid, water, and oxidised nicotinamide adenine dinucleotide (NAD+}. Its products are oxaloacetic acid, ammonia, reduced NADH, and a proton. Nicotinamide adenine dinucleotide phosphate can be used as an alternative cofactor. [1] [2] [3]

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH2 group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is L-aspartate:NAD(P)+ oxidoreductase (deaminating). Other names in common use include NAD-dependent aspartate dehydrogenase, NADH2-dependent aspartate dehydrogenase, and NADP+-dependent aspartate dehydrogenase. This enzyme participates in nicotinate and nicotinamide metabolism. [4]

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2DC1.

References

  1. Enzyme 1.4.1.21 at KEGG Pathway Database.
  2. Okamura T, Noda H, Fukuda S, Ohsugi M (August 1998). "Aspartate dehydrogenase in vitamin B12-producing Klebsiella pneumoniae IFO 13541". J. Nutr. Sci. Vitaminol. 44 (4). Tokyo: 483–90. doi: 10.3177/jnsv.44.483 . PMID   9819709.
  3. Kazakova OW; Kariakina, T. I.; Weinova, M. K.; Sidelnikova, L. I.; Kazakova, O. W. (1981). "The synthesis of aspartic acid in Rhizobium lupini bacteroids". Plant Soil. 61 (1–2): 145–156. Bibcode:1981PlSoi..61..145K. doi:10.1007/BF02277371. S2CID   44867070.
  4. Tong L; Savchenko, A; Yakunin, A; Zhang, R; Edwards, A; Arrowsmith, C; Tong, L (2003). "Aspartate dehydrogenase, a novel enzyme identified from structural and functional studies of TM1643". J. Biol. Chem. 278 (10): 8804–8. doi: 10.1074/jbc.M211892200 . PMID   12496312.