H-Val-OH

CAS# 72-18-4

H-Val-OH

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Chemical structure

H-Val-OH

3D structure

Chemical Properties of H-Val-OH

Cas No. 72-18-4 SDF Download SDF
PubChem ID 6287 Appearance Powder
Formula C5H11NO2 M.Wt 117.1
Type of Compound Alkaloids Storage Desiccate at -20°C
Synonyms L-valine; Valine; 72-18-4; (S)-Valine; (S)-2-Amino-3-methylbutanoic acid
Solubility H2O : 25 mg/mL (213.40 mM; Need ultrasonic)
Chemical Name (2S)-2-amino-3-methylbutanoic acid
SMILES CC(C)C(C(=O)O)N
Standard InChIKey KZSNJWFQEVHDMF-BYPYZUCNSA-N
Standard InChI InChI=1S/C5H11NO2/c1-3(2)4(6)5(7)8/h3-4H,6H2,1-2H3,(H,7,8)/t4-/m0/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Source of H-Val-OH

The cultures of Corynebacterium glutamicum.

Biological Activity of H-Val-OH

DescriptionL-Valine is an essential amino acid for the human body. L-Valine and L-isoleucine could be used in the supplements of low-protein corn and soybean meal all-vegetable diets for broilers.
In vitro

L-valine production with pyruvate dehydrogenase complex-deficient Corynebacterium glutamicum.[Pubmed: 17293513 ]

Appl Environ Microbiol. 2007 Apr;73(7):2079-84.


METHODS AND RESULTS:
Corynebacterium glutamicum was engineered for the production of L-Valine from glucose by deletion of the aceE gene encoding the E1p enzyme of the pyruvate dehydrogenase complex and additional overexpression of the ilvBNCE genes encoding the L-Valine biosynthetic enzymes acetohydroxyacid synthase, isomeroreductase, and transaminase B. In the absence of cellular growth, C. glutamicum DeltaaceE showed a relatively high intracellular concentration of pyruvate (25.9 mM) and produced significant amounts of pyruvate, L-alanine, and L-Valine from glucose as the sole carbon source. Lactate or acetate was not formed. Plasmid-bound overexpression of ilvBNCE in C. glutamicum DeltaaceE resulted in an approximately 10-fold-lower intracellular pyruvate concentration (2.3 mM) and a shift of the extracellular product pattern from pyruvate and L-alanine towards L-Valine.
CONCLUSIONS:
In fed-batch fermentations at high cell densities and an excess of glucose, C. glutamicum DeltaaceE(pJC4ilvBNCE) produced up to 210 mM L-Valine with a volumetric productivity of 10.0 mM h(-1) (1.17 g l(-1) h(-1)) and a maximum yield of about 0.6 mol per mol (0.4 g per g) of glucose.

Application of model discriminating experimental design for modeling and development of a fermentative fed-batch L-valine production process.[Pubmed: 15984033]

Biotechnol Bioeng. 2005 Aug 5;91(3):356-68.

A model discriminating experimental design approach for fed-batch processes has been developed and applied to the fermentative production of L-Valine by a genetically modified Corynebacterium glutamicum strain possessing multiple auxotrophies as an example.
METHODS AND RESULTS:
Being faced with the typical situation of uncertain model information based on preliminary experiments, model discriminating design was successfully applied to improve discrimination between five competing models. Within the same modeling and experimental design framework, also the planning of an optimized production process with respect to the total volumetric productivity is shown. Simulation results were experimentally affirmed, yielding an increased total volumetric productivity of 6.2 mM L-Valine per hour.
CONCLUSIONS:
However, also so far unknown metabolic mechanisms were observed in the optimized process, underlining the importance of process optimization during modeling to avoid problems of extreme extrapolation of model predictions during the final process optimization.

H-Val-OH Dilution Calculator

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H-Val-OH Molarity Calculator

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Preparing Stock Solutions of H-Val-OH

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 8.5397 mL 42.6985 mL 85.3971 mL 170.7942 mL 213.4927 mL
5 mM 1.7079 mL 8.5397 mL 17.0794 mL 34.1588 mL 42.6985 mL
10 mM 0.854 mL 4.2699 mL 8.5397 mL 17.0794 mL 21.3493 mL
50 mM 0.1708 mL 0.854 mL 1.7079 mL 3.4159 mL 4.2699 mL
100 mM 0.0854 mL 0.427 mL 0.854 mL 1.7079 mL 2.1349 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on H-Val-OH

Application of model discriminating experimental design for modeling and development of a fermentative fed-batch L-valine production process.[Pubmed:15984033]

Biotechnol Bioeng. 2005 Aug 5;91(3):356-68.

A model discriminating experimental design approach for fed-batch processes has been developed and applied to the fermentative production of L-valine by a genetically modified Corynebacterium glutamicum strain possessing multiple auxotrophies as an example. Being faced with the typical situation of uncertain model information based on preliminary experiments, model discriminating design was successfully applied to improve discrimination between five competing models. Within the same modeling and experimental design framework, also the planning of an optimized production process with respect to the total volumetric productivity is shown. Simulation results were experimentally affirmed, yielding an increased total volumetric productivity of 6.2 mM L-valine per hour. However, also so far unknown metabolic mechanisms were observed in the optimized process, underlining the importance of process optimization during modeling to avoid problems of extreme extrapolation of model predictions during the final process optimization.

L-valine production with pyruvate dehydrogenase complex-deficient Corynebacterium glutamicum.[Pubmed:17293513]

Appl Environ Microbiol. 2007 Apr;73(7):2079-84.

Corynebacterium glutamicum was engineered for the production of L-valine from glucose by deletion of the aceE gene encoding the E1p enzyme of the pyruvate dehydrogenase complex and additional overexpression of the ilvBNCE genes encoding the L-valine biosynthetic enzymes acetohydroxyacid synthase, isomeroreductase, and transaminase B. In the absence of cellular growth, C. glutamicum DeltaaceE showed a relatively high intracellular concentration of pyruvate (25.9 mM) and produced significant amounts of pyruvate, L-alanine, and L-valine from glucose as the sole carbon source. Lactate or acetate was not formed. Plasmid-bound overexpression of ilvBNCE in C. glutamicum DeltaaceE resulted in an approximately 10-fold-lower intracellular pyruvate concentration (2.3 mM) and a shift of the extracellular product pattern from pyruvate and L-alanine towards L-valine. In fed-batch fermentations at high cell densities and an excess of glucose, C. glutamicum DeltaaceE(pJC4ilvBNCE) produced up to 210 mM L-valine with a volumetric productivity of 10.0 mM h(-1) (1.17 g l(-1) h(-1)) and a maximum yield of about 0.6 mol per mol (0.4 g per g) of glucose.

Description

L-Valine is one of 20 proteinogenic amino acids. L-Valine is an essential amino acid.

Keywords:

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