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1.1.1.42: isocitrate dehydrogenase (NADP+)

This is an abbreviated version!
For detailed information about isocitrate dehydrogenase (NADP+), go to the full flat file.

Word Map on EC 1.1.1.42

Reaction

isocitrate
+
NADP+
=
2-oxoglutarate
+
CO2
+
NADPH
+
H+

Synonyms

AbIDH1, AfIDH, CgIDH, cICDH, CtIDP1, CtIDP2, cytosolic isocitrate dehydrogenase 1, cytosolic NADP(+)-dependent isocitrate dehydrogenase, cytosolic NADP+-dependent isocitrate dehydrogenase, cytosolic NADP-dependent isocitrate dehydrogenase, cytosolic NADPH-dependent isocitrate dehydrogenase, DpIDH, EcIDH, HICDH, ICD, ICD1, ICD2, icdA, ICDH, ICDH-1, IDH, IDH-90, IDH-I, IDH-IIa, IDH-IIb, IDH1, IDH2, IDH3, IDHP, IDP, IDP1, IDP2, IDP3, IDPA, IDPc, IDPm, isocitrate dehydrogenase, isocitrate dehydrogenase (NADP), isocitrate dehydrogenase (NADP-dependent), isocitrate dehydrogenase (nicotinamide adenine dinucleotide phosphate), isocitrate dehydrogenase 1, isocitrate dehydrogenase 2, isocitrate dehydrogenase-1, isocytrate deyhdrogenase, mICDH, mitochondrial NADP+-dependent isocitrate dehydrogenase, NAD+-dependent isocitrate dehydrogenase, NADP isocitric dehydrogenase, NADP+ dependent isocitrate dehydrogenase, NADP+-dependent Ds-threo-isocitrate dehydrogenase, NADP+-dependent Ds-threo-isocitrate:NADP+ oxidoreductase, NADP+-dependent ICDH, NADP+-dependent IDH, NADP+-dependent isocitrate dehydrogenase, NADP+-ICDH, NADP+-IDH, NADP+-isocitrate dehydrogenase, NADP+-linked isocitrate dehydrogenase, NADP+-specific ICDH, NADP+-specific IDH, NADP+-specific isocitrate dehydrogenase, NADP-dependent IDH, NADP-dependent isocitrate dehydrogenase, NADP-dependent isocitric dehydrogenase, NADP-ICDH, NADP-IDH, NADP-IDH Idp1p, NADP-isocitrate dehydrogenase, NADP-linked isocitrate dehydrogenase, NADP-specific isocitrate dehydrogenase, NADPH-dependent isocitrate dehydrogenase, NADPH-IDH, oxalosuccinate decarboxylase, oxalsuccinic decarboxylase, perICDH, PS-NADP-IDH, TaIDH, TM1148, YlIDP

ECTree

     1 Oxidoreductases
         1.1 Acting on the CH-OH group of donors
             1.1.1 With NAD+ or NADP+ as acceptor
                1.1.1.42 isocitrate dehydrogenase (NADP+)

Engineering

Engineering on EC 1.1.1.42 - isocitrate dehydrogenase (NADP+)

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PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
S113A
S113D
S113E
S113G
S113T
S113Y
R211M
C363S
the mutation does not perturb the enzymatic characteristics of the enzyme. However, the mutant is less affected by nitrosoglutathione treatment than the wild type enzyme
D253A/S257K/K260Q/R314D/H315I/T327A
site-directed mutagenesis, the mutant shows a witch in cofactor specificity from NADP+ to NAD+
R314D
site-directed mutagenesis
R314D/H315I/T327A
site-directed mutagenesis
D253A/S257K/K260Q/R314D/H315I/T327A
-
site-directed mutagenesis, the mutant shows a witch in cofactor specificity from NADP+ to NAD+
-
R314D
-
site-directed mutagenesis
-
R314D/H315I/T327A
-
site-directed mutagenesis
-
A325P/G326S
50% inactivation after 10 min at 91.3°C as compared to 87.5°C for wild-type enzyme
A336F
50% inactivation after 10 min at 74°C as compared to 87.5°C or wild-type enzyme
I321L
50% inactivation after 10 min at 88.9°C as compared to 87.5°C for wild-type enzyme
Y309I/I310L
50% inactivation after 10 min at 88.4°C as compared to 87.5°C for wild-type enzyme
Y309I/I310L/I321L/A325P/G326S
50% inactivation after 10 min at 90°C as compared to 87.5°C for wild-type enzyme
A741S
-
the mutant exhibits higher specific activity and thermostability than the wild type enzyme
E538L
-
the mutant exhibits higher thermostability than wild type enzyme
E596L
-
the mutant exhibits higher specific activity and thermostability than the wild type enzyme
C201M
-
higher affinity for NAD+ than for NADP+
C201N
-
higher affinity for NAD+ than for NADP+
C201V
-
higher affinity for NAD+ than for NADP+
R153C
the mutation dramatically reduces the catalytic efficiency of the enzyme for isocitrate oxidation, which drops to 1.5% of the wild type enzyme. The mutant acquires a neomorphic ability of producing 2-hydroxyglutarate from 2-oxoglutarate
R153H
the mutation dramatically reduces the catalytic efficiency of the enzyme for isocitrate oxidation, which drops to 0.6% of the wild type enzyme. The mutant acquires a neomorphic ability of producing 2-hydroxyglutarate from 2-oxoglutarate
S113E
-
affinity for isopropylmalate is 37-fold compared to wild-type
R291S
Q8X277
involved in coenzyme specificity
R291S/K343D/Y344I/V350A/Y390P
Q8X277
switch in coenzyme specificity from NADP+ to NAD+
R291S/K343D/Y344I/Y390P
Q8X277
involved in coenzyme specificity
R291S/K343D/Y390P
Q8X277
involved in coenzyme specificity
R291S/Y390P
Q8X277
involved in coenzyme specificity
A134D
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
C269S
C379S
D273L
the mutant exhibits an about 170fold decrease in catalytic efficiency, driven by a 5.4fold decrease in kcat and 31fold increase in Km as compared to the wild type enzyme
D273L/R132H
catalytically inactive
D273N
the mutant has a more than 500fold decrease in kcat/Km, driven primarily through more than 300fold increase in Km as compared to the wild type enzyme
D273N/R132H
catalytically inactive
D273S
the mutant exhibits adecrease in catalytic efficiency, driven by a 2.5fold decrease in kcat and 200fold increase in Km as compared to the wild type enzyme
D273S/R132H
catalytically inactive
G123R
site-directed mutagenesis, mutation is located in the catalytic domain, the mutant shows reduced activity compared to the wild-type enzyme
H133Q
the mutant shows strongly reduced catalytic efficiency compared to the wild type enzyme
K217M
the mutant shows reduced catalytic efficiency as compared to the wild type enzym
K217Q
the mutant shows reduced catalytic efficiency as compared to the wild type enzym
K413Q
the acetylation surrogate mutant of isoform IDH2 exhibits lower oxidative reaction rates than wild type. 2-Hydroxyglutarate production by the mutant is largely diminished at the enzymatic and cellular level
R100Q
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132A
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132C
R132G
R132K
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132L
R132N
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132Q
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132S
R132V
-
naturally occuring IDH1 mutation
R132W
the mutant shows severely reduced catalytic efficiency compared to the wild type enzyme
R132X
R172K
IDH2 R172 mutation causes production and accumulation of 2-hydroxyglutarate in acute myelogenous leukemia cells
R172X
naturally occuring mutations of IDH2 in metastatic brain tumors
H590L/R601D
the mutant with strongly decreased activity wit NADP+ compared to the wild type enzyme displays a 0.183fold preference for NAD+ over NADP+
H590L/R601D/R650S
the mutant with severely decreased activity with NADP+ compared to the wild type enzyme displays a 5.93fold preference for NAD+ over NADP+
H590L/R601D
-
the mutant with strongly decreased activity wit NADP+ compared to the wild type enzyme displays a 0.183fold preference for NAD+ over NADP+
-
H590L/R601D/R650S
-
the mutant with severely decreased activity with NADP+ compared to the wild type enzyme displays a 5.93fold preference for NAD+ over NADP+
-
C245S
the activities of the mutant in the presence of Cd2+ are decreased as that of wild type enzyme
C379S
the activity of the mutant in the absence of Cd2+ is similar to that of the wild type enzyme, but the decrease of activity in the presence of Cd2+ is much reduced
K106Q
the activity of the mutant is about 118% of the wild type value
K155Q
the activity of the mutant is about 110% of the wild type value
K166Q
the activity of the mutant is about 80% of the wild type value
K180Q
the activity of the mutant is about 60% of the wild type value
K243Q
the activity of the mutant is about 90% of the wild type value
K251Q
inactive
K256Q
the activity of the mutant is about 40% of the wild type value
K263Q
the activity of the mutant is about 80% of the wild type value
K272Q
the activity of the mutant is about 65% of the wild type value
K275Q
the activity of the mutant is about 85% of the wild type value
K282Q
the activity of the mutant is about 105% of the wild type value
K360Q
the mutant shows wild type activity
K384Q
the activity of the mutant is about 90% of the wild type value
K413Q
the activity of the mutant is about 20% of the wild type value
K442Q
the activity of the mutant is about 90% of the wild type value
K80Q
the activity of the mutant is about 105% of the wild type value
L536E
-
the mutant is more thermolabile than wild type enzyme
L594E
-
the mutant is more thermolabile than wild type enzyme and has a lower specific activity at temperatures over 45°C
S739A
-
the mutant is more thermolabile than wild type enzyme
D375N
15fold increase in KM-value for NADP+, marked decrease of Vmax-value
H309F
-
site-directed mutagenesis, inactive mutant, poor cofactor binding, altered secondary structure
H309Q
-
site-directed mutagenesis, inactive mutant, poor cofactor binding, altered secondary structure
H315Q
-
site-directed mutagenesis, 40fold increased Km for NADP+ compared to the wild-type enzyme
H319Q
-
site-directed mutagenesis, cofactor binding and kinetics similar to the wild-type enzyme, slightly reduced activity
K212Q
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, altered pH-dependency of the activity
K212R
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, altered pH-dependency of the activity
K212Y
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, altered pH-dependency of the activity
K260Q
28fold increase in KM-value for NADP+, marked decrease of Vmax-value
K321Q
-
site-directed mutagenesis, kinetics are similar to the wild-type enzyme
K374Q
little change in kinetic parameters
N328D
36% decrease in vmax-value compared to wild-type
N328S
slight decrease in vmax-value compared to wild-type
N97A
-
site-directed mutagenesis, decreased Vmax compared to the wild-type enzyme, slightly affected Km values, but increased pKa of the ionizable metal-liganded hydroxyl of enzyme-bound isocitrate compared to the wild-type enzyme
N97D
-
site-directed mutagenesis, highly decreased Vmax compared to the wild-type enzyme
R132X
-
mutation of an arginine residue in pig mitochondrial IDH2 equivalent to R132 in human IDH1 causes a dramatic increase in Km for isocitrate by a factor of 165, with minimal effect on Vmax
R314Q
-
site-directed mutagenesis, 10fold increased Km for NADP+ compared to the wild-type enzyme
R323Q
-
site-directed mutagenesis, kinetics are similar to the wild-type enzyme
R83K
slight decrease in vmax-value compared to wild-type
R83Q
slight decrease in vmax-value compared to wild-type
S95A
-
site-directed mutagenesis, decreased Vmax, and increased Km for isocitrate and Mn2+ compared to the wild-type enzyme
S95D
-
site-directed mutagenesis, highly decreased Vmax compared to the wild-type enzyme
T311A
slight decrease in vmax-value compared to wild-type
T311N
vmax-value is less than 1% of the value of wild-type
T311S
large increase in vmax-value compared to wild-type
T373A
reduction of Vmax-value to 1% of wild-type
T373S
little change in kinetic parameters
T373V
reduction of Vmax-value to 20% of wild-type
T78A
-
site-directed mutagenesis, decreased Vmax, and increased Km for isocitrate and Mn2+ compared to the wild-type enzyme
T78D
-
site-directed mutagenesis, decreased Vmax compared to the wild-type enzyme
Y140E
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, unaltered Km for isocitrate and NADP+
Y140F
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, unaltered Km for isocitrate and NADP+
Y140K
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, unaltered Km for isocitrate and NADP+
Y140T
site-directed mutagenesis, highly decreased activity in both reaction directions compared to the wild-type enzyme, unaltered Km for isocitrate and NADP+, highly increased activation by added exogenous acetic acid and phenol compared to the wild-type enzyme
Y316F
-
site-directed mutagenesis, kinetics are similar to the wild-type enzyme
Y316L
-
site-directed mutagenesis, 4fold increased Km for NADP+ compared to the wild-type enzyme
D389N
reduction in apparent melting temperature by 21.8°C compared to wild-type
F205M
reduction in apparent melting temperature by 3.5°C compared to wild-type
R186M
no change in apparent melting temperature compared to wild-type
H590L/R601L
-
the mutations greatly reduce the affinity for NADP+, but fail to improve the ability to use NAD+ so the mutant has similar affinities to NADP+ and NAD+
K589T/H590L/R601L
-
the mutations greatly reduce the affinity for NADP+, but fail to improve the ability to use NAD+ so the mutant has similar affinities to NADP+ and NAD+
R322D
site-directed mutagenesis, the mutant shows an 41fold higher Km for NADP+ than the wild-type enzyme, and it shows NAD+-dependent activity in contrast to the wild-type enzyme
R322D/H323I
site-directed mutagenesis, inactive mutant
R322D
-
site-directed mutagenesis, the mutant shows an 41fold higher Km for NADP+ than the wild-type enzyme, and it shows NAD+-dependent activity in contrast to the wild-type enzyme
-
R322D/H323I
-
site-directed mutagenesis, inactive mutant
-
additional information