HOME
login
history
all enzymes
BRENDA home
History
Information on EC 1.5.1.40 - 8-hydroxy-5-deazaflavin:NADPH oxidoreductase
for references in articles please use BRENDA:EC1.5.1.40Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
EC Tree
1.5.1.40 8-hydroxy-5-deazaflavin:NADPH oxidoreductaseIUBMB Comments
The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate .
Specify your search results
Word Map
- 1.5.1.40
-
methanogen
- archaea
-
methanococcus
- 8-hydroxy-5-deazaflavins
-
hydride
- hydrogenase
- vannielii
- thermoautotrophicum
-
methanobacterium
-
methanogenesis
-
stereochemical
- methane
- fulgidus
- griseus
-
si-face
The expected taxonomic range for this enzyme is: Archaea, Bacteria
Synonyms
5-deazaflavin-NADP+ reductase, 8-hydroxy-5-deazaflavin-dependent NADP+ reductase, 8-OH-5-deazaflavin:NADPH oxidoreductase, 8-OH-5dFl:NADPH oxidoreductase, AF0892, F420-dependent NADP oxidoreductase, F420-dependent NADP reductase, F420-dependent NADP+ oxidoreductase, F420:NADPH oxidoreductase, F420H2:NADP oxidoreductase, 
more
topPlease wait a moment until the data is sorted. This message will disappear when the data is sorted.
SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
8-hydroxy-5-deazaflavin-dependent NADP+ reductase
8-OH-5-deazaflavin:NADPH oxidoreductase
F420-dependent NADP oxidoreductase
F420-dependent NADP reductase
F420H2:NADP oxidoreductase
Fno
NADP+:F420 oxidoreductase
8-hydroxy-5-deazaflavin-dependent NADP+ reductase
-
the enzyme is a component of the formate NADP+ oxidoreductase system of Methanococcus vannielii
8-hydroxy-5-deazaflavin-dependent NADP+ reductase
-
the enzyme is a component of the formate NADP+ oxidoreductase system of Methanococcus vannielii
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
reduced coenzyme F420 + NADP+ = oxidized coenzyme F420 + NADPH + H+
-
-
-
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SYSTEMATIC NAME
IUBMB Comments
reduced coenzyme F420:NADP+ oxidoreductase
The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate [1].
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
5'-O-methyl-7,8-didemethyl-8-hydroxyflavin + NADPH + H+
8-hydroxypyrimido[4,5-b]-2,4-(3H,10H)-dione + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
r
5-deaza-8-hydroxyisoalloxazine + NADPH + H+
8-hydroxypyrimido[4,5-b]-2,4-(3H,10H)-dione + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
7,8-didemethyl-8-hydroxy-5-deazariboflavin 5'-phosphate + NADPH + H+
1-deoxy-1-(8-hydroxy-2,4-dioxo-1,3,4,5-tetrahydropyrimido[4,5-b]quinolin-10(2H)-yl)-5-O-phospho-D-ribitol + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
1,5-dihydro-8-hydroxy-5-deazaflavin + NADP+
8-hydroxy-5-deazaflavin + NADPH + H+
-
the kcat value of the forward reaction is 24 times greater than that of the reverse reaction, thus the production of NADPH at pH 7.0 is more favorable than its consumption
-
-
r
1,5-dihydro-8-hydroxy-5-deazaflavin + NADP+
8-hydroxy-5-deazaflavin + NADPH + H+
-
the kcat value of the forward reaction is 24 times greater than that of the reverse reaction, thus the production of NADPH at pH 7.0 is more favorable than its consumption
-
-
r
5-deaza-8-hydroxy-10-methylisoalloxazine + NADPH + H+
? + NADP+
-
-
-
-
?
5-deaza-8-hydroxy-10-methylisoalloxazine + NADPH + H+
? + NADP+
-
-
-
-
?
coenzyme F0 + NADPH + H+
reduced coenzyme F0 + NADP+
-
i.e. 7,8-didemethyl-8-hydroxy-5-deazariboflavin. The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
coenzyme F0 + NADPH + H+
reduced coenzyme F0 + NADP+
-
i.e. 7,8-didemethyl-8-hydroxy-5-deazariboflavin. The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
coenzyme F0 + NADPH + H+
reduced coenzyme F0 + NADP+
-
i.e. 7,8-didemethyl-8-hydroxy-5-deazariboflavin. The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
coenzyme F0 + NADPH + H+
reduced coenzyme F0 + NADP+
-
i.e. 7,8-didemethyl-8-hydroxy-5-deazariboflavin. The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
coenzyme F0 + NADPH + H+
reduced coenzyme F0 + NADP+
-
i.e. 7,8-didemethyl-8-hydroxy-5-deazariboflavin. The enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate
-
-
?
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate. No activity with NAD+
-
-
?
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate. No activity with NAD+
-
-
?
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the main function of this oxidoreductase is probably to provide cells with reduced 8-hydroxy-5-deazaflavin to be used in specific reduction reactions
-
-
?
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate. No activity with NAD+
-
-
r
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate. No activity with NAD+
-
-
?
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the enzyme has an absolute requirement for both the 5-deazaflavin structure and the presence of an 8-hydroxy group in the substrate. No activity with NAD+
-
-
?
oxidized coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
-
-
?
oxidized coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
-
-
?
reduced coenzyme F420 + NADP+
coenzyme F420 + NADPH + H+
-
direct hydride transfer process, A side-specific, with respect to the prochiral center C5 of the dihydro-8-hydroxy-5-deazaflavin cofactor
-
-
?
reduced coenzyme F420 + NADP+
coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
of the two substrates NADP+ has to bind first, the binding being associated with an induced fit. The stereochemical analysis of the hydrode transfer leads to the conclusion that the observed orientation of the Si-face of coenzyme F420 towards the Si-face of NADP+ allows only the transfer of the proS hydrogen at C5 to the proS position at C4 and vice versa
-
-
?
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
the enzyme is Si face specific with respect to C5 of reduced coenzyme F420 and Si face specific with respect to C4 of NADP+. The enzyme is specific for both coenzyme F420 and NADP+/NADPH
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
the enzyme exhibits a sequential kinetic mechanism
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
the enzyme exhibits a sequential kinetic mechanism
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
FNO catalyzes the NADP+ reduction more efficiently compared to NADPH oxidation
-
-
r
additional information
?
-
-
F420 and the F420 redox moiety, FO, are phenolic 5-deazaflavin cofactors that complement nicotinamide and flavin redox coenzymes in biochemical oxidoreductases and photocatalytic systems. Specifically, these 5-deazaflavins lack the single electron reactivity with O2 of riboflavin-derived coenzymes (FMN and FAD), and, in general, have a more negative redox potential than NAD(P)+. A convenient synthesis of FO is achieved by improving the redox stability of synthetic intermediates containing a polar, electron-rich aminophenol fragment, Fno enzyme activity is restored with FO in the absence of F420, method optimization, overview
-
-
-
additional information
?
-
-
effects of side chain length of residue Il135 on the donor-acceptor distance between NADP+ and the F420 precursor, FO, overview
-
-
-
additional information
?
-
NADP+ binding site structure, overview. A F420-dependent enzyme
-
-
-
additional information
?
-
-
NADP+ binding site structure, overview. A F420-dependent enzyme
-
-
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
coenzyme F420 + NADPH + H+
reduced coenzyme F420 + NADP+
-
the main function of this oxidoreductase is probably to provide cells with reduced 8-hydroxy-5-deazaflavin to be used in specific reduction reactions
-
-
?
reduced coenzyme F420 + NADP+
coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
-
r
reduced coenzyme F420 + NADP+
oxidized coenzyme F420 + NADPH + H+
-
-
-
r
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
COFACTOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
NaCl
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
additional information
-
the enzyme is not inhibited by iodoacetamide (20 mM), chloromercuribenzoate (20 mM) or N-ethylmaleimide (7 mM) when preincubated for 30 min in the presence of these reagents. The enzyme is not inactivated by dioxygen
-
additional information
inhibitor prediction studies reveal that lovastatin and compactin (mevastatin) produced more affinity for model structure of NADP oxidoreducatse as compared to F420. It indicates that the lovastatin and compactin (mevastatin) compounds (negative regulator) may act as potential inhibitor of F420 dependent NADP oxidoreducatse protein
-
additional information
-
inhibitor prediction studies reveal that lovastatin and compactin (mevastatin) produced more affinity for model structure of NADP oxidoreducatse as compared to F420. It indicates that the lovastatin and compactin (mevastatin) compounds (negative regulator) may act as potential inhibitor of F420 dependent NADP oxidoreducatse protein
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.0155
7,8-didemethyl-8-hydroxy-5-deazariboflavin 5'-phosphate
-
pH 6.0, 22°C
0.0625
coenzyme F420
-
pH and temperature not specified in the publication
0.07
NADP+
pH 8.0, temperature not specified in the publication
0.05
NADPH
pH 6.0, temperature not specified in the publication
10
NADPH
pH 6.0, 25°C, recombinant mutant R51E/R55A; pH 6.0, 25°C, recombinant mutant R51V/R55V
12
NADPH
pH 6.0, 25°C, recombinant mutant T28A/R51V; pH 6.0, 25°C, recombinant mutant T28A/R51V/R55V
180
NADPH
above, pH 6.0, 25°C, recombinant mutant R51A; above, pH 6.0, 25°C, recombinant mutant R51V
500
NADPH
above, pH 6.0, 25°C, recombinant mutant R51E/R55A; above, pH 6.0, 25°C, recombinant mutant R51E/R55N; above, pH 6.0, 25°C, recombinant mutant R51E/R55S; above, pH 6.0, 25°C, recombinant mutant R51V/R55V; above, pH 6.0, 25°C, recombinant mutant R55N; above, pH 6.0, 25°C, recombinant mutant S50E; above, pH 6.0, 25°C, recombinant mutant S50E/R55A; above, pH 6.0, 25°C, recombinant mutant S50E/R55V; above, pH 6.0, 25°C, recombinant mutant S50Q; above, pH 6.0, 25°C, recombinant mutant T28A/R51V; above, pH 6.0, 25°C, recombinant mutant T28A/R51V/R55V
0.0036
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135A; with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135G
0.0037
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135V
0.004
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant wild-type enzyme
0.3
oxidized coenzyme F420
pH 6.0, temperature not specified in the publication
0.0077
reduced coenzyme F420
-
pH and temperature not specified in the publication
0.15
reduced coenzyme F420
pH 8.0, temperature not specified in the publication
additional information
additional information
-
substrate binding studies, steady-state and pre steady-state kinetic analysis with wild-type enzyme Fno and Ile135 Fno mutant variants, I135A, I135V, and I135G, overview. Steady-state kinetic analysis of wild-type Fno and the variants show classical Michaelis-Menten kinetics with varying FO concentrations. The data reveal a decreased kcat as side chain length decreased, with varying FO concentrations. The steady-state plots reveal non-Michaelis-Menten kinetic behavior when NADPH is varied. The double reciprocal plot of the varying NADPH concentrations displays a downward concave shape, while the NADPH binding curves gave Hill coefficients of less than 1. These data suggest that negative cooperativity occurs between the two identical monomers. The pre steady-state Abs420 versus time trace reveals biphasic kinetics, with a fast phase (hydride transfer) and a slow phase. The fast phase displays an increased rate constant as side chain length decreases. The rate constant for the second phase, remained about 2/s for each variant. Pre-steady-state data with F420 cofactor and NADPH for the enzyme Fno mutant variants reveal biphasic kinetics with a fast and slow phase, similar with wild-type Fno, overview
-
additional information
additional information
-
the enzyme shows half-site reactivity and negative cooperativity (Koshland-Nemethy-Filmer model) in the reversible reduction of NADP+ through the transfer of a hydride from the reduced F420 cofactor, steady-state kinetic analysis revealing classical Michaelis-Menten kinetics with varying concentrations of the F420 redox moiety, and non-Michaelis-Menten kinetic behavior when NADPH is varied. Pre-steady-state, stopped flow, Single-turnover, and steady-state kinetics, detailed overview
-
additional information
additional information
steady-state kinetics
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
35.57
7,8-didemethyl-8-hydroxy-5-deazariboflavin 5'-phosphate
-
pH 6.0, 22°C
1.6
NADPH
above, pH 6.0, 25°C, recombinant mutant R51A; pH 6.0, 25°C, recombinant mutant R51E/R55A
2.7
NADPH
pH 6.0, 25°C, recombinant mutant R51E/R55N; pH 6.0, 25°C, recombinant mutant S50E; pH 6.0, 25°C, recombinant mutant T28A/R51V
2.8
NADPH
pH 6.0, 25°C, recombinant mutant R51V/R55V; pH 6.0, 25°C, recombinant mutant R55N
3.2
NADPH
pH 6.0, 25°C, recombinant mutant R51A; pH 6.0, 25°C, recombinant mutant R55V
3.3
NADPH
pH 6.0, 25°C, recombinant mutant T28A/R51V/R55V; pH 6.0, 25°C, recombinant mutant T28A/R55A; pH 6.0, 25°C, recombinant wild-type enzyme
0.7
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135G
1.6
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135A
1.8
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135V
5.3
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant wild-type enzyme
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
kcat/KM VALUE [1/mMs-1]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
2295
7,8-didemethyl-8-hydroxy-5-deazariboflavin 5'-phosphate
-
pH 6.0, 22°C
0.16
NADPH
pH 6.0, 25°C, recombinant mutant R51E/R55A; pH 6.0, 25°C, recombinant wild-type enzyme
0.28
NADPH
pH 6.0, 25°C, recombinant mutant R51V/R55V; pH 6.0, 25°C, recombinant mutant T28A/R51V/R55V
0.42
NADPH
pH 6.0, 25°C, recombinant mutant R51E/R55N; pH 6.0, 25°C, recombinant mutant R55A
194.4
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135G
444.4
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135A
486.5
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant mutant I135V
1325
oxidized coenzyme F420
-
with F420 precursor, FO, pH 6.5, 22°C, recombinant wild-type enzyme
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
3.5
reduction of oxidized coenzyme F420 with NADPH
5.5
7.4
7.9
9.2
pH optimum for reduction of NADP+ with reduced coenzyme F420
5.5
pH optimum for reduction of oxidized coenzyme F420 with NADPH
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
pH RANGE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
4.3 - 6.7
-
pH 4.3: about 50% of maximal activity, pH 6.7: about 50% of maximal activity
4.5 - 6.5
-
pH 4.5: about 45% of maximal activity, pH 6.5: about 35% of maximal activity, reduction of oxidized coenzyme F420 with NADPH
7 - 9
-
pH 7.0: about 60% of maximal activity, pH 9.0: about 50% of maximal activity, reduction of NADP+ with reduced coenzyme F420
7.5 - 10
pH 7.5: about 50% of maximal activity, pH 10.0: about 90% of maximal activity, reduction of NADP+ with reduced coenzyme F420
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
22
37
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
TEMPERATURE RANGE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
15 - 50
-
15°C: about 45% of maximal activity, 50°C: about 45% of maximal activity
25 - 90
the enzyme displays highest activity between 60°C and 70°C. The activity at 65°C is almost 4fold higher than that at 25°C. The apparent melting temperature of Tfu-FNO is 75°C, about 50% of maximal activity at 40°C and 90°C
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
pI VALUE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
SOURCE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
malfunction
T28A mutant shows 3fold increased kinetic efficiency compared with the wild-type enzyme when NADPH is the substrate
physiological function
additional information
physiological function
-
the main function of this oxidoreductase is probably to provide cells with reduced 8-hydroxy-5-deazaflavin to be used in specific reduction reactions. The last step of the tetracycline biosynthesis in Streptomyces aureofaciens in which 5a,11a-dehydrochlortetracycline is reduced to chlortetracycline is 8-hydroxy-5-deazaflavin-dependent, and the reducing equivalents are obtained from NADPH
physiological function
-
residue I135 plays a key role in sustaining the donor-acceptor distance between the two cofactor substrates, thereby regulating the rate at which the hydride is transferred from FOH2 to NADP+. Fno is a dynamic enzyme that regulates NADPH production
physiological function
-
half-site reactivity and negative cooperativity involving the important F420 cofactor-dependent enzyme. F420H2:NADP+ oxidoreductase (Fno), an F420 cofactor-dependent enzyme that catalyzes the reversible reduction of NADP+ through the transfer of a hydride from the reduced F420 cofactor. Fno may be a functional regulatory enzyme
physiological function
-
F420-dependent NADP+ oxidoreductase (Fno) is critical to the conversion of CO2 to CH4 by methanogenic archaea, while the F420 redox moiety, FO, functions as a light-harvesting agent in DNA repair
additional information
the active site of F420-dependent enzyme Tfu-FNO is located in a hydrophobic pocket between an N-terminal dinucleotide binding domain and a smaller C-terminal domain. Residues interacting with the 2'-phosphate of NADP+, Thr28, Ser50, Arg51, and Arg55, are important for discriminating between NADP+ and NAD+. Molecular recognition of the two cofactor substrates, F420 and NAD(P)H by FNO, overview
additional information
-
the active site of F420-dependent enzyme Tfu-FNO is located in a hydrophobic pocket between an N-terminal dinucleotide binding domain and a smaller C-terminal domain. Residues interacting with the 2'-phosphate of NADP+, Thr28, Ser50, Arg51, and Arg55, are important for discriminating between NADP+ and NAD+. Molecular recognition of the two cofactor substrates, F420 and NAD(P)H by FNO, overview
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
Sequence
FNO_ARCFU
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
212
0
22865
Swiss-Prot
FNO_METJA
Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)
223
0
24068
Swiss-Prot
FNO_METTH
Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)
232
0
24539
Swiss-Prot
FNO_METTM
Methanothermobacter marburgensis (strain ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 / Marburg)
224
0
23448
Swiss-Prot
A0A284VTZ6_9EURY
216
0
23946
TrEMBL
Q18KL8_HALWD
Haloquadratum walsbyi (strain DSM 16790 / HBSQ001)
222
0
23152
TrEMBL
A0A1V6IJK0_9EURY
246
0
26274
TrEMBL
A0A1V4YCI8_9EURY
242
0
25980
TrEMBL
A0A1V4U2G3_9EURY
216
0
23427
TrEMBL
M1XMW5_NATM8
Natronomonas moolapensis (strain DSM 18674 / JCM 14361 / 8.8.11)
222
0
23283
TrEMBL
A0A1V4U731_9EURY
216
0
23387
TrEMBL
A0A1V5A5N1_9EURY
216
0
23387
TrEMBL
A0A1V5ZDE6_9EURY
216
0
23422
TrEMBL
A0A150JEW9_9EURY
246
0
26274
TrEMBL
A0A1Q9P175_9ARCH
220
0
24419
TrEMBL
A0A284VQM5_9EURY
218
0
23612
TrEMBL
A0A1V5SZS8_9EURY
216
0
23518
TrEMBL
A0A1U7EU52_NATPD
Natronomonas pharaonis (strain ATCC 35678 / DSM 2160 / CIP 103997 / NBRC 14720 / NCIMB 2260 / Gabara)
222
0
23413
TrEMBL
Q9HMC5_HALSA
Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1)
222
0
23009
TrEMBL
A0A1V5SI68_9EURY
219
0
23461
TrEMBL
A0A1V5YCS4_9EURY
221
0
23547
TrEMBL
A0A1V4Y7J9_9EURY
241
0
25926
TrEMBL
A0A1Q9N7R4_9ARCH
359
0
39159
TrEMBL
A0A1V5IFM2_9EURY
216
0
23268
TrEMBL
A0A1V4UJD5_9EURY
216
0
23354
TrEMBL
B0R886_HALS3
Halobacterium salinarum (strain ATCC 29341 / DSM 671 / R1)
222
0
23009
TrEMBL
A0A2K5AT23_9ARCH
222
0
24281
TrEMBL
A0A2Z2HRG5_9ARCH
223
0
24181
TrEMBL
A0A557SU56_9ARCH
225
0
24611
TrEMBL
G0LHQ4_HALWC
Haloquadratum walsbyi (strain DSM 16854 / JCM 12705 / C23)
222
0
23122
TrEMBL
A0A4D6GQH3_HALS9
Halobacterium salinarum (strain ATCC 33171 / DSM 3754 / JCM 8978 / NBRC 102687 / NCIMB 764 / 91-R6)
222
0
22971
TrEMBL
A5UJ76_METS3
Methanobrevibacter smithii (strain ATCC 35061 / DSM 861 / OCM 144 / PS)
226
0
23732
TrEMBL
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
PDB
SCOP
CATH
UNIPROT
ORGANISM
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
28000
45000
-
1 * 60000 (alpha) + 1 * 50000 (beta) + 1 * 45000 (gamma), SDS-PAGE
50000
-
1 * 60000 (alpha) + 1 * 50000 (beta) + 1 * 45000 (gamma), SDS-PAGE
60000
-
1 * 60000 (alpha) + 1 * 50000 (beta) + 1 * 45000 (gamma), SDS-PAGE
90000
gradient gel electrophoresis under nondenaturating conditions
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
dimer
homotetramer
trimer
homotetramer
4 * 23500, calculated from sequence; 4 * 28000, SDS-PAGE
homotetramer
-
4 * 23500, calculated from sequence; 4 * 28000, SDS-PAGE
-
trimer
-
1 * 60000 (alpha) + 1 * 50000 (beta) + 1 * 45000 (gamma), SDS-PAGE
trimer
-
1 * 60000 (alpha) + 1 * 50000 (beta) + 1 * 45000 (gamma), SDS-PAGE
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
hanging-drop vapour diffusion method, crystal structure of the enzyme bound with coenzyme F420. The structure resolved to 1.65 A contains two domains: an N-terminal domain characteristic of a dinucleotide-binding Rossmann fold and a smaller C-terminal domain. The nicotinamide and the deazaflavin part of the two coenzymes are bound in the cleft between the domains such that the Si-faces of both face each other at a distance of 3.1 A, which is optimal for hydride transfer
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
I135A
-
site-directed mutagenesis, the mutant shows altered kinetics compared to the wild-type enzyme
I135G
-
site-directed mutagenesis, the mutant shows altered kinetics compared to the wild-type enzyme
I135V
-
site-directed mutagenesis, the mutant shows altered kinetics compared to the wild-type enzyme
R51A
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R51E/R55A
site-directed mutagenesis, the mutant shows similar catalytic efficiency compared to the wild-type enzyme
R51E/R55N
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R51E/R55S
site-directed mutagenesis, the mutant shows similar catalytic efficiency compared to the wild-type enzyme
R51V
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R51V/R55V
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R55A
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R55N
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R55S
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
R55V
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
S50E
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
S50E/R55A
site-directed mutagenesis, the mutant shows reduced catalytic efficiency compared to the wild-type enzyme
S50E/R55V
site-directed mutagenesis, the mutant shows slightly increased catalytic efficiency compared to the wild-type enzyme
S50Q
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
T28A
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
T28A/R51V
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
T28A/R51V/R55V
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
T28A/R55A
site-directed mutagenesis, the mutant shows increased catalytic efficiency compared to the wild-type enzyme
additional information
-
pre-steady-state data with F420 cofactor and NADPH for the enzyme Fno mutant variants reveal biphasic kinetics with a fast and slow phase, similar with wild-type Fno, overview
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
TEMPERATURE STABILITY
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
25 - 90
the enzyme displays highest activity between 60°C and 70°C. The activity at 65°C is almost 4fold higher than that at 25°C. The apparent melting temperature of Tfu-FNO is 75°C, about 50% of maximal activity at 40°C and 90°C
additional information
additional information
F420-dependent enzyme Tfu-FNO is highly thermostable
additional information
-
F420-dependent enzyme Tfu-FNO is highly thermostable
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
GENERAL STABILITY
ORGANISM
UNIPROT
LITERATURE
in 0.08 M NaCl a half-life of 9 h is found which increased to greater than 6000 h in 1 M NaCl (both in the presence of 2% ethylene glycol)
-
neither high salt or protease inhibitors were effective in stabilizing the activity of the partially purified enzyme
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
ORGANIC SOLVENT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Ethylene glycol
-
enhanced the stability: half-life increased from 9 to 750 h in 18% ethylene glycol (in 0.08 M NaCl)
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
OXIDATION STABILITY
ORGANISM
UNIPROT
LITERATURE
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
-75°C, 2 months, at low concentration (0.066 mg/ml), in the presence of ethylene glycol, 20% (v/v), no loss of activity
-
4°C, at low concentration (0.066 mg/ml), in the presence of ethylene glycol, 20% (v/v), 22% of the activity is lost
-
4°C, at low concentration (0.066 mg/ml), the purified enzyme loses 84% of its activity in 2 days
-
4°C, purified enzyme at a protein concentration of 20 mg/ml is completely stable when stored at 4°C in 50 mM Tricine/KOH pH 8.0 containing 0.2 M KCl
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant enzyme from cell-free extracts of Escherichia coli strain C41(DE3) by heat treatment at 90°C for 30 min, ammonium sulfate fractionation with addition of 0.05% polyethylenimine, followed by an ion exchange chromatography, ultrafiltration, and gel filtration
-
recombinant enzyme from Escherichia coli by ammonium sulfate fractionation followed by anion exchange chromatography, DNase I treatment during protein purification is essential to remove residual DNA
recombinant wild-type and mutant enzymes from cell-free extracts of Escherichia coli strain C41(DE3) by heat treatment at 90°C for 30 min, ammonium sulfate fractionation with addition of 0.05% polyethylenimine, followed by an ion exchange chromatography, ultrafiltration, and gel filtration
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
cloning and recombinant expression in Escherichia coli strain C41(DE3)
-
gene Tfu-fno, DNA and amino acid sequence determination and analysis, recombinant expression in Escherichia coli
overexpression in Escherichia coli
recombinant expression of wild-type and mutant enzymes in Escherichia coli strain C41(DE3)
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Novotna, J.; Neuzil, J.; Hostalek, Z.
Spectrophotometric identification of 8-hydroxy-5-deazaflavin. NADPH oxidoreductase activity in Streptomyces producing tetracyclines
FEMS Microbiol. Lett.
59
241-246
1989
Kitasatospora aureofaciens, Kitasatospora aureofaciens 84/25, Streptomyces rimosus, Streptomyces rimosus P
-
brenda
Eker, A.P.; Hessels, J.K.; Meerwaldt, R.
Characterization of an 8-hydroxy-5-deazaflavin:NADPH oxidoreductase from Streptomyces griseus
Biochim. Biophys. Acta
990
80-86
1989
Streptomyces griseus
brenda
Kunow,J.; Schwörer, B.; Stetter, K.O.; Thauer, R.K.
A F420-dependent NADP reductase in the extremely thermophilie sulfate-reducing Archaeoglobus fulgidus
Arch. Microbiol.
160
199-205
1993
Archaeoglobus fulgidus (O29370)
-
brenda
Berk, H.; Thauer, R.K.
Function of coenzyme F420-dependent NADP reductase in methanogenic archaea containing an NADP-dependent alcohol dehydrogenase
Arch. Microbiol.
168
396-402
1997
Methanobacterium palustre, Methanobacterium palustre DSM 3108, Methanoculleus thermophilus, Methanoculleus thermophilus DSM 3915, Methanofollis liminatans, Methanofollis liminatans DSM 4140, Methanogenium organophilum (P80951), Methanogenium organophilum DSM 3596 (P80951)
brenda
Sharma, A.; Chaudhary, P.P.; Sirohi, S.K.; Saxena, J.
Structure modeling and inhibitor prediction ofNADP oxidoreductase enzyme from Methanobrevibacter smithii
Bioinformation
6
15-19
2011
Methanobrevibacter smithii (A5UJ76), Methanobrevibacter smithii, Methanobrevibacter smithii DSM 861 (A5UJ76)
brenda
Warkentin, E.; Mamat, B.; Sordel-Klippert, M.; Wicke, M.; Thauer, R.K.; Iwata, M.; Iwata, S.; Ermler, U.; Shima, S.
Structures of F420H2:NADP+ oxidoreductase with and without its substrates bound
EMBO J.
20
6561-6569
2001
Archaeoglobus fulgidus (O29370)
brenda
Berk, H.; Thauer, R.K.
F420H2:NADP oxidoreductase from Methanobacterium thermoautotrophicum: identification of the encoding gene via functional overexpression in Escherichia coli
FEBS Lett.
438
124-126
1998
Methanothermobacter thermautotrophicus (D9PVP5), Methanothermobacter thermautotrophicus, Methanothermobacter thermautotrophicus DSM 2133 (D9PVP5)
brenda
de Wott, L.E.A.; Eker, A.P.M.
8-Hydroxy-5-deazaflavin-dependent electron transfer in the extreme halophile Halobacterium cutirubrum
FEMS Microbiol. Lett.
48(1-2)
121-125
1987
Halobacterium salinarum, Halobacterium salinarum NRC34001
-
brenda
Yamazaki, S.; Tsai, L.
Purification and properties of 8-hydroxy-5-deazaflavin-dependent NADP+ reductase from Methanococcus vannielii
J. Biol. Chem.
255
6462-6465
1980
Methanococcus vannielii, Methanococcus vannielii DSM 1224
brenda
Elias, D.A.; Juck, D.F.; Berry, K.A.; Sparling, R.
Purification of the NADP+:F420 oxidoreductase of Methanosphaera stadtmanae
Can. J. Microbiol.
46
998-1003
2000
Methanosphaera stadtmanae, Methanosphaera stadtmanae DSM 3091
brenda
Yamazaki, S.; Tsai, L.; Stadtman, T.C.; Jacobson, F.S.; Walsh, C.
Stereochemical studies of 8-hydroxy-5-deazaflavin-dependent NADP+ reductase from Methanococcus vannielii.
J. Biol. Chem.
255
9025-9027
1980
Methanococcus vannielii
brenda
Le, C.; Oyugi, M.; Joseph, E.; Nguyen, T.; Ullah, M.; Aubert, J.; Phan, T.; Tran, J.; Johnson-Winters, K.
Effects of isoleucine 135 side chain length on the cofactor donor-acceptor distance within F420H2NADP+ oxidoreductase A kinetic analysis
Biochem. Biophys. Rep.
9
114-120
2017
Archaeoglobus fulgidus (O29370)
brenda
Joseph, E.; Le, C.Q.; Nguyen, T.; Oyugi, M.; Hossain, M.S.; Foss, F.W.; Johnson-Winters, K.
Evidence of negative cooperativity and half-site reactivity within an F420-dependent enzyme kinetic analysis of F420H2NADP+ oxidoreductase
Biochemistry
55
1082-1090
2016
Archaeoglobus fulgidus (O29370)
brenda
Kumar, H.; Nguyen, Q.T.; Binda, C.; Mattevi, A.; Fraaije, M.W.
Isolation and characterization of a thermostable F420NADPH oxidoreductase from Thermobifida fusca
J. Biol. Chem.
292
10123-10130
2017
Thermobifida fusca (Q47RA9), Thermobifida fusca
brenda
Hossain, M.S.; Le, C.Q.; Joseph, E.; Nguyen, T.Q.; Johnson-Winters, K.; Foss, F.W.
Convenient synthesis of deazaflavin cofactor FO and its activity in F420-dependent NADP reductase
Org. Biomol. Chem.
13
5082-5085
2015
Archaea
brenda
Select items on the left to see more content.
EXTERNAL LINKS (specific for EC-Number 1.5.1.40)
html completed
Use of this online version of BRENDA is free under the CC BY 4.0 license. See terms of use for full details.
Information
