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Isocitrate dehydrogenase (ICDH)

Cat No.:V74040 Purity: ≥98%
Isocitrate dehydrogenase (ICDH) Isocitrate dehydrogenase is a citric acid or tricarboxylic acid cycle enzyme widely used in biochemical research.
Isocitrate dehydrogenase (ICDH)
Isocitrate dehydrogenase (ICDH) Chemical Structure CAS No.: 9028-48-2
Product category: IDH
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
10mg
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Product Description
Isocitrate dehydrogenase (ICDH) Isocitrate dehydrogenase is a citric acid or tricarboxylic acid cycle enzyme widely used in biochemical research. Isocitrate dehydrogenase catalyzes the oxidative decarboxylation of isocitrate to generate α-ketoglutarate and reduces NAD(P)+ to NAD(P)H, playing an important role in cell metabolism.
Isocitrate dehydrogenase (ICDH) (CAS#: 9028-48-2) is a homodimeric enzyme that catalyzes the oxidative decarboxylation of isocitrate to α-ketoglutarate, a critical step in the citric acid cycle. It reduces NAD(P)+ to NAD(P)H, playing a vital role in cellular metabolism, including adaptation to hypoxia, histone demethylation, and DNA modification. The enzyme exists in multiple isoforms, such as the cytosolic NADP+-dependent IDH1 and the mitochondrial NAD+-dependent IDH3. The specific product with CAS 9028-48-2 is typically an NADP+-dependent isocitric dehydrogenase (Type IV) from porcine heart, supplied as a solution in 50% glycerol with EDTA buffer salts at pH 6.0, with a quality level indicating that ≤0.2% of its main activity is observed when NAD is used as the cofactor.
Biological Activity I Assay Protocols (From Reference)
Targets
The primary targets of ICDH are its substrates, isocitrate and the cofactors NAD+ or NADP+, depending on the isoform. The enzyme is also regulated by allosteric effectors; for example, the NAD+-linked mitochondrial enzyme displays allosteric properties, while the NADP+-linked enzyme is non-allosteric.
ln Vitro
ICDH exhibits specific in vitro activity of 3-20 units/mg protein. One unit is defined as the amount of enzyme that will convert 1.0 μmole of isocitrate to α-ketoglutarate per minute at pH 7.4 and 37°C. The enzyme shows a high preference for NADP+, with only about 0.2% of the main activity obtained with NAD as the cofactor. It has been used in activity assays to study the effects of various compounds, such as thorium, on citric acid cycle enzymes, and as a standard to measure the impact of temperature on NADP-IDH activity.
ln Vivo
In vivo, ICDH participates in several critical physiological processes, including adaptation to hypoxia, histone demethylation, and DNA modification. Its activity is essential for maintaining cellular redox balance and providing intermediates for biosynthetic pathways.
Enzyme Assay
In vitro enzyme activity assays for ICDH typically involve measuring the reduction of NAD(P)+ to NAD(P)H spectrophotometrically at 340 nm. The assay mixture contains isocitrate, NADP+, magnesium chloride, and the enzyme sample in an appropriate buffer (e.g., Tris-HCl, pH 7.4). Activity is calculated based on the rate of absorbance increase. The detection range for such kits is typically 0.2 mmol/L to 20 mmol/L. Sample types for these assays include serum, plasma, tissue extracts, and cell lysates.
Cell Assay
Cellular ICDH activity is typically measured in cell lysates using colorimetric or spectrophotometric microplate assay kits. Cells are lysed in an appropriate buffer, and the lysates are incubated with isocitrate and NADP+ substrate. The production of NADPH is detected colorimetrically at OD 450 nm or fluorometrically. These kits are suitable for a variety of sample types, including serum, plasma, tissue extracts, cell lysates, and cell culture supernatants.
Animal Protocol
In vivo animal studies involving ICDH typically utilize rodent models to assess enzyme activity in various tissues following experimental interventions. Tissue homogenates are prepared from organs such as the liver, heart, or brain, and ICDH activity is measured using the same spectrophotometric methods as in vitro assays. Studies may investigate the effects of toxins, drugs, or genetic modifications on enzyme activity in specific tissues.
ADME/Pharmacokinetics
As an enzyme, ICDH does not have conventional pharmacokinetic properties like absorption, distribution, metabolism, and excretion (ADME). However, the enzyme is stable in buffered aqueous glycerol solutions and maintains activity under appropriate storage conditions (2-8°C). Its stability may be affected by temperature, pH, and the presence of cofactors or inhibitors. The compound is typically shipped on wet ice.
Toxicity/Toxicokinetics
ICDH is generally considered non-toxic as a research reagent. The enzyme itself is a naturally occurring protein and does not present significant toxicity concerns in laboratory settings. Standard laboratory safety practices should be followed when handling the enzyme preparation, including the use of personal protective equipment such as dust masks, eyeshields, and gloves.
References

[1]. Reitman ZJ, Yan H. Isocitrate dehydrogenase 1 and 2 mutations in cancer: alterations at a crossroads of cellular metabolism. J Natl Cancer Inst. 2010 Jul 7;102(13):932-41.

Additional Infomation
See other relationships...
ICDH (EC 1.1.1.42) is a widely used research tool in metabolism studies, and its activity is often measured as a marker of mitochondrial function and cellular metabolic status. It is involved in several processes such as adapting to hypoxia, histone demethylation, and DNA modification. Mutations in the IDH1 and IDH2 genes are associated with certain cancers, making the enzyme a target of therapeutic interest. The product from porcine heart is a common source for research applications.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C46H56O2
Molecular Weight
640.935653686523
Exact Mass
640.428
CAS #
9028-48-2
PubChem CID
77834905
Appearance
Colorless to light yellow liquid
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
2
Rotatable Bond Count
4
Heavy Atom Count
48
Complexity
933
Defined Atom Stereocenter Count
0
SMILES
OC1CC(C)(C)C2C=CC(C(=CC3C=CC=CC=3)C)=CC=2C1(C)C.OC1CC(C)(C)C2C=C(C(=CC3C=CC=CC=3)C)C=CC=2C1(C)C
InChi Key
GQASXCYBZFOWQR-UHFFFAOYSA-N
InChi Code
InChI=1S/2C23H28O/c1-16(13-17-9-7-6-8-10-17)18-11-12-19-20(14-18)22(2,3)15-21(24)23(19,4)5;1-16(13-17-9-7-6-8-10-17)18-11-12-19-20(14-18)23(4,5)21(24)15-22(19,2)3/h2*6-14,21,24H,15H2,1-5H3
Chemical Name
1,1,4,4-tetramethyl-6-(1-phenylprop-1-en-2-yl)-2,3-dihydronaphthalen-2-ol;1,1,4,4-tetramethyl-7-(1-phenylprop-1-en-2-yl)-2,3-dihydronaphthalen-2-ol
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.5602 mL 7.8010 mL 15.6021 mL
5 mM 0.3120 mL 1.5602 mL 3.1204 mL
10 mM 0.1560 mL 0.7801 mL 1.5602 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
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  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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