Galactitol-1-phosphate 5-dehydrogenase

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galactitol-1-phosphate 5-dehydrogenase
Identifiers
EC no. 1.1.1.251
CAS no. 167618-25-9
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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PMC articles
PubMed articles
NCBI proteins

In enzymology, galactitol-1-phosphate 5-dehydrogenase (EC 1.1.1.251) is an enzyme that catalyzes the chemical reaction

+ NAD+
 
 
 
H+
Galactitol-1-phosphate 5-dehydrogenase
 
H+
 
+ NADH
 

The two substrates of this enzyme are galactitol-1-phosphate and oxidised nicotinamide adenine dinucleotide (NAD+). Its 3 products are L-tagatose 6-phosphate (shown in its open-chain keto form), reduced NADH, and a proton. [1] [2]

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is galactitol-1-phosphate:NAD+ oxidoreductase. This enzyme participates in galactose metabolism. It employs one cofactor, zinc.

References

  1. Enzyme 1.1.1.251 at KEGG Pathway Database.
  2. Nobelmann B, Lengeler JW (1995). "Sequence of the gat operon for galactitol utilization from a wild-type strain EC3132 of Escherichia coli". Biochim. Biophys. Acta. 1262 (1): 69–72. doi:10.1016/0167-4781(95)00053-j. PMID   7772602.