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EC 4.2.1.136 Details
EC number
4.2.1.136
Accepted name
ADP-dependent NAD(P)H-hydrate dehydratase
Reaction
(1) ADP + (6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide = AMP + phosphate + NADH;;(2) ADP + (6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide phosphate = AMP + phosphate + NADPH
Other name(s)
(6S)-β-6-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase(ADP-hydrolysing), (6S)-6-β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase (ADP-hydrolysing, NADH-forming)
Systematic name
(6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase (ADP-hydrolysing; NADH-forming)
Comment
Acts equally well on hydrated NADH and hydrated NADPH. NAD(P)H spontaneously hydrates to both the (6S)- and (6R)- isomers. The enzyme from bacteria consists of two domains, one of which acts as an NAD(P)H-hydrate epimerase that interconverts the two isomers to a 60:40 ratio (cf. EC 5.1.99.6), while the other catalyses the dehydration. Hence the enzyme can restore the complete mixture of isomers into NAD(P)H. The enzyme has no activity with ATP, contrary to the enzyme from eukaryotes (cf. EC 4.2.1.93, ATP-dependent NAD(P)H-hydrate dehydratase).
History
created 2012
EC Tree
4.2.1.13 created 1961, deleted 2001
4.2.1.14 created 1961, deleted 2001
4.2.1.15 created 1961, deleted 1972
4.2.1.16 created 1961, deleted 2001
4.2.1.21 created 1961, deleted 1964
4.2.1.23 created 1961, deleted 1972
4.2.1.26 created 1965, deleted 2002
4.2.1.29 created 1965, deleted 2004
4.2.1.37 created 1972, deleted 1992
4.2.1.38 created 1972, deleted 2001
4.2.1.63 created 1972, deleted 1978
4.2.1.64 created 1972, deleted 1978
4.2.1.71 created 1978, modified 1989, modified 2000, deleted 2004
4.2.1.72 created 1978, deleted 2000
4.2.1.86 created 1989, deleted 2004
4.2.1.102 created 2001, deleted 2001