3-dehydroquinate synthase II

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3-dehydroquinate synthase II
Identifiers
EC no. 1.4.1.24
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BRENDA BRENDA entry
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NCBI proteins

3-dehydroquinate synthase II (EC 1.4.1.24, DHQ synthase II, MJ1249 (gene), aroB' (gene)) is an enzyme with systematic name 2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate:NAD+ oxidoreductase (deaminating). [1] This enzyme catalyses the following chemical reaction

2-amino-2,3,7-trideoxy-D-lyxo-hept-6-ulosonic acid.svg
(1)
+ NAD+
 
 
H2O
H+
3-dehydroquinate synthase II
H2O
H+
 
+ NADH + NH3
 

The three substrates of this enzyme are 2-amino-2,3,7-trideoxy-D-lyxo-hept-6-ulosonic acid (1), water, and oxidised nicotinamide adenine dinucleotide (NAD+). Its products are 3-dehydroquinic acid, ammonia, reduced NADH, and a proton. [2] It was isolated from the archaeon Methanocaldococcus jannaschii . [1]

References

  1. 1 2 White RH (June 2004). "L-Aspartate semialdehyde and a 6-deoxy-5-ketohexose 1-phosphate are the precursors to the aromatic amino acids in Methanocaldococcus jannaschii". Biochemistry. 43 (23): 7618–27. doi:10.1021/bi0495127. PMID   15182204.
  2. Enzyme 1.4.1.24 at KEGG Pathway Database.