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Literature summary for 1.6.5.9 extracted from

  • De Vries, S.; Grivell, L.A.
    Purification and characterization of a rotenone-insensitive NADH:Q6 oxidoreductase from mitochondria of Saccharomyces cerevisiae (1988), Eur. J. Biochem., 176, 377-384.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
flavone
-
Saccharomyces cerevisiae
additional information NAD+, Mg-ADP, Mg-ATP, Ca2+ (all at 2 mM) or piericidin, rotenone (both at 0.01 mM) or adenosyl-3'-O-[3-[N-(4-azido-2-nitrophenyl)-amino]propionyl]-NAD+ (0.05 mM) are without inhibitory or stimulatory effects Saccharomyces cerevisiae

Localization

Localization Comment Organism GeneOntology No. Textmining
mitochondrial membrane mitochondrial inner membrane Saccharomyces cerevisiae 31966
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
53000
-
SDS-PAGE Saccharomyces cerevisiae

Organism

Organism UniProt Comment Textmining
Saccharomyces cerevisiae
-
-
-

Purification (Commentary)

Purification (Comment) Organism
DEAE-cellulose column chromatography and blue Sepharose CL-6B column chromatography Saccharomyces cerevisiae

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.78
-
crude extract, using ubiquinone-2 as substrate, at pH 6.2, temperature not specified in the publication Saccharomyces cerevisiae
61.9
-
after 2134fold purification, using ubiquinone-6 as substrate, at pH 6.2, temperature not specified in the publication Saccharomyces cerevisiae
1671
-
after 2134fold purification, using ubiquinone-2 as substrate, at pH 6.2, temperature not specified in the publication Saccharomyces cerevisiae

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 ferricyanide + NADH
-
Saccharomyces cerevisiae 2 ferrocyanide + NAD+ + H+
-
?
NADH + H+ + 2,6-dichloroindophenol
-
Saccharomyces cerevisiae NAD+ + reduced 2,6-dichloroindophenol
-
?
NADH + H+ + menaquinone
-
Saccharomyces cerevisiae NAD+ + menaquinol
-
?
NADH + H+ + ubiquinone-10
-
Saccharomyces cerevisiae NAD+ + ubiquinol-10
-
?
NADH + H+ + ubiquinone-2 ubiquinone is the best electron acceptor Saccharomyces cerevisiae NAD+ + ubiquinol-2
-
?
NADH + H+ + ubiquinone-6
-
Saccharomyces cerevisiae NAD+ + ubiquinol-6
-
?

Subunits

Subunits Comment Organism
monomer 1 * 53000, SDS-PAGE Saccharomyces cerevisiae

Synonyms

Synonyms Comment Organism
NADH:Q6 oxidoreductase
-
Saccharomyces cerevisiae

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
0.031
-
NADH using ubiquinone-2 as substrate, in 20 mM MOPS/KOH, 1 mM EDTA, 0.03% (v/v) Triton X-100, 200 mM KCl, pH 6.2, temperature not specified in the publication Saccharomyces cerevisiae

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.2
-
with ubiquinone-2 as acceptor a sharp maximum at pH 6.2 is obtained Saccharomyces cerevisiae

pH Range

pH Minimum pH Maximum Comment Organism
4.5 9.5 with ubiquinone-6 as acceptor the activity is almost constant between pH 4.5 and 9.5, at pH values lower than 4.5 and higher than 9.5, enzymic activity is irreversibly destroyed Saccharomyces cerevisiae

Cofactor

Cofactor Comment Organism Structure
FAD non-covalently linked Saccharomyces cerevisiae
additional information the enzyme contains no iron-sulfur clusters Saccharomyces cerevisiae
NADH the enzyme is specific for NADH. NADPH or deamino-NADH show rates that are at least 250times lower than obtained with NADH at any pH between 5.5 and 8.5 Saccharomyces cerevisiae

IC50 Value

IC50 Value IC50 Value Maximum Comment Organism Inhibitor Structure
0.095
-
using ubiquinone-2 as substrate, in 20 mM MOPS/KOH, 1 mM EDTA, 0.03% (v/v) Triton X-100, 200 mM KCl, pH 6.2, temperature not specified in the publication Saccharomyces cerevisiae flavone

Expression

Organism Comment Expression
Saccharomyces cerevisiae the amount of enzyme in the cell is subject to glucose repression, it increases slightly when cells, grown on glucose or lactate, enter the stationary phase up