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EC 4.2.1.93 Details
EC number
4.2.1.93
Accepted name
ATP-dependent NAD(P)H-hydrate dehydratase
Reaction
(1) ATP + (6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide = ADP + phosphate + NADH;;(2) ATP + (6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide phosphate = ADP + phosphate + NADPH
Other name(s)
reduced nicotinamide adenine dinucleotide hydrate dehydratase, ATP-dependent H4NAD(P)+OH dehydratase, (6S)-β-6-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase(ATP-hydrolysing), (6S)-6-β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase (ATP-hydrolysing, NADH-forming)
Systematic name
(6S)-6β-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine-dinucleotide hydro-lyase (ATP-hydrolysing; NADH-forming)
CAS registry number
116669-08-0
Comment
Acts equally well on hydrated NADH and hydrated NADPH. NAD(P)H spontaneously hydrates to both the (6S)- and (6R)- isomers, and these are interconverted by EC 5.1.99.6, NAD(P)H-hydrate epimerase, to a 60:40 ratio [4]. Hence EC 4.2.1.93 together with EC 5.1.99.6 can restore the mixture of hydrates into NAD(P)H [3,4]. The enzyme from eukaryotes has no activity with ADP, contrary to the enzyme from bacteria (cf. EC 4.2.1.136, ADP-dependent NAD(P)H-hydrate dehydratase) [4].
History
created 1992, modified 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