496100
Omeprazole
A cell-permeable pyridyl methylsulfinyl benzimidazole compound that acts as selective proton pump inhibitor.
Synonym(s):
Omeprazole, H 168/68, 5-Methoxy-2[(4-methoxy-3,5-dimethyl-2-pyridyl)methylsulfinyl]-1H-benzimidazole
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About This Item
Empirical Formula (Hill Notation):
C17H19N3O3S
CAS Number:
Molecular Weight:
345.42
MDL number:
UNSPSC Code:
12352200
NACRES:
NA.77
Recommended Products
Quality Level
Assay
≥94% (HPLC)
form
solid
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
protect from light
color
tan to off-white
solubility
DMSO: 25 mg/mL
cation traces
heavy metals: ≤20 ppm
shipped in
ambient
storage temp.
2-8°C
InChI
1S/C17H19N3O3S/c1-10-8-18-15(11(2)16(10)23-4)9-24(21)17-19-13-6-5-12(22-3)7-14(13)20-17/h5-8H,9H2,1-4H3,(H,19,20)
InChI key
SUBDBMMJDZJVOS-UHFFFAOYSA-N
General description
A cell-permeable pyridyl methylsulfinyl benzimidazole compound that acts as selective proton pump inhibitor. Behaves as a prodrug by undergoing an acid-catalyzed rearrangement to a thiol-reactive cationic sulfenamide that inhibits (H+, K+)-ATPase in the gastric milieu. An aryl hydrocarbon-like inducer of cytochrome P450 secretion in human liver.
A cell-permeable, selective proton pump inhibitor. Behaves as a prodrug by undergoing an acid-catalyzed rearrangement to a thiol-reactive cationic sulfenamide that inhibits (H+-K+)-ATPase in the gastric milieu. Also acts as an aryl hydrocarbon-like inducer of cytochrome P450 secretion in human liver.
Biochem/physiol Actions
Cell permeable: yes
Primary Target
proton pump
proton pump
Product does not compete with ATP.
Reversible: no
Packaging
Packaged under inert gas
Warning
Toxicity: Irritant (B)
Reconstitution
Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.
Other Notes
Lambrecht, N., et al. 2000. J. Biol. Chem.275, 4041.
Besancon, M., et al. 1997. J. Biol. Chem.272, 22438.
Sachs, G., et al. 1995. Ann. Rev. Pharmacol. Toxicol.35, 277.
Diaz, D., et al. 1990. Gastroenterology99, 737.
Fellenius, E., et al. 1981. Nature290, 159.
Besancon, M., et al. 1997. J. Biol. Chem.272, 22438.
Sachs, G., et al. 1995. Ann. Rev. Pharmacol. Toxicol.35, 277.
Diaz, D., et al. 1990. Gastroenterology99, 737.
Fellenius, E., et al. 1981. Nature290, 159.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Skin Sens. 1
Storage Class Code
11 - Combustible Solids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Certificates of Analysis (COA)
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M Besancon et al.
The Journal of biological chemistry, 272(36), 22438-22446 (1997-09-05)
The vesicular gastric H,K-ATPase catalyzes an electroneutral H for K exchange allowing acidification of the intravesicular space. There is a total of 28 cysteines present in the alpha subunit of the gastric H,K-ATPase, of which 10 are found in the
N Lambrecht et al.
The Journal of biological chemistry, 275(6), 4041-4048 (2000-02-08)
The gastric H,K-ATPase is covalently inhibited by substituted pyridyl-methylsulfinyl-benzimidazoles, such as omeprazole, that convert to thiophilic probes of luminally accessible cysteines in the acid space. The K(+) competitive inhibitor, SCH28080, prevented inhibition of acid transport by omeprazole. In stably expressing
D Diaz et al.
Gastroenterology, 99(3), 737-747 (1990-09-01)
Omeprazole is a new drug used for its high efficiency as an inhibitor of gastric acid secretion. This substituted benzimidazole molecule had been shown to decrease several liver cytochrome P450-mediated monooxygenase activities both in vitro and in vivo. The present
E Fellenius et al.
Nature, 290(5802), 159-161 (1981-03-12)
Studies both in vivo and in vitro have shown that substituted benzimidazoles inhibit the stimulation of acid secretion produced by dibutyryl cyclic AMP and histamine. Furthermore, the results differ from those produced by H2 antagonists and anticholinergic agents in that
G Sachs et al.
Annual review of pharmacology and toxicology, 35, 277-305 (1995-01-01)
The gastric H+,K+ ATPase--the gastric acid pump--is the molecular target for the class of antisecretory drugs called the proton-pump inhibitors (PPIs). These compounds--omeprazole, lansoprazole, and pantoprazole--contain, as their core structure, 2-pyridyl methylsulfinyl benzimidazole. The H+,K+ ATPase is a heterodimer composed
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