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1.6.1.1: NAD(P)+ transhydrogenase (Si-specific)

This is an abbreviated version!
For detailed information about NAD(P)+ transhydrogenase (Si-specific), go to the full flat file.

Word Map on EC 1.6.1.1

Reaction

NADPH
+
NAD+
=
NADP+
+
NADH

Synonyms

energy-independent soluble pyridine nucleotide transhydrogenase, H+-thase, NAD transhydrogenase, NAD(P) transhydrogenase, NAD(P)(+) transhydrogenase [B-specific], NADH transhydrogenase, NADH-NADP-transhydrogenase, NADPH-NAD oxidoreductase, NADPH-NAD transhydrogenase, NADPH:NAD+ transhydrogenase, nicotinamide adenine dinucleotide (phosphate) transhydrogenase, nicotinamide nucleotide transhydrogenase, NNT, non-energy-linked transhydrogenase, pyridine nucleotide transferase, pyridine nucleotide transhydrogenase, soluble pyridine nucleotide transhydrogenase, soluble transhydrogenase, STH, SthA, transhydrogenase, transhydrogenase, nicotinamide adenine dinucleotide (phosphate), UdhA

ECTree

     1 Oxidoreductases
         1.6 Acting on NADH or NADPH
             1.6.1 With NAD+ or NADP+ as acceptor
                1.6.1.1 NAD(P)+ transhydrogenase (Si-specific)

Temperature Stability

Temperature Stability on EC 1.6.1.1 - NAD(P)+ transhydrogenase (Si-specific)

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TEMPERATURE STABILITY
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
4 - 50
the enzyme retains 50% activity after 5 h at 50°C. The enzyme is stable at 4°C for 25 days and retains 65% activity at 25°C. The enzyme is rapidly inactivated at high temperatures, retaining 80%, 50% and 10% activity after incubation for 30 min at 50, 57 and 62°C, respectively
51
-
25 min, 50% inactivation, accelerated by addition of NADPH, reactivation by FAD
55
-
approx. 50% activity lost after about 2 min, almost complete loss of activity after 20 min, biphasic inactivation: 70% activity lost with a first-order inactivation constant, 30% is lost much more rapidly, rate of thermal inactivation depends on concentration of NAD+, NADP+, NADH, NADPH, free FAD, Mg2+ and phosphate, independent of pH between pH 5 and pH 9, significant acceleration outside this range, addition of 1 mM FAD lowers inactivation rate about 20fold
57
purified enzyme, pH 7.5, 30 min, 50% activity remaining
62
purified enzyme, pH 7.5, 30 min, 10% activity remaining
65
-
15 min, complete inactivation, protection by FAD