Target type: molecularfunction
Catalysis of the hydrolysis of any O-glycosyl bond. [GOC:mah]
Hydrolase activity, hydrolyzing O-glycosyl compounds, refers to the enzymatic ability to break down O-glycosidic bonds, which link a sugar moiety to a hydroxyl group of another molecule. These enzymes are critical in a wide range of biological processes, including:
* **Carbohydrate metabolism:** Hydrolyzing O-glycosyl compounds allows for the breakdown of complex carbohydrates into simpler sugars, which can be utilized as energy sources or building blocks for other biomolecules.
* **Signal transduction:** Some O-glycosyl compounds are involved in cell signaling pathways. Hydrolyzing these molecules can activate or deactivate signaling cascades, impacting cellular processes like growth, differentiation, and response to environmental stimuli.
* **Glycoprotein processing:** Many proteins are glycosylated, meaning they have sugar moieties attached to them. Hydrolyzing O-glycosyl compounds can modify these glycoproteins, influencing their structure, function, and interactions with other molecules.
* **Biomaterial degradation:** O-glycosyl compounds are found in various biomaterials, including plant cell walls and extracellular matrices. Hydrolyzing these molecules is essential for the breakdown and recycling of these materials.
* **Pathogen defense:** Some O-glycosyl compounds are associated with pathogens, such as bacteria and viruses. Hydrolyzing these molecules can disrupt pathogen attachment, invasion, and survival.
The specific mechanism of O-glycosyl compound hydrolysis varies depending on the enzyme and substrate. However, all these enzymes utilize a catalytic mechanism that involves the formation of an enzyme-substrate complex and the subsequent cleavage of the O-glycosidic bond, often through nucleophilic attack by a catalytic residue in the enzyme active site. This process results in the release of the individual sugar and aglycone (non-sugar) components of the O-glycosyl compound.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Beta-glucuronidase | A beta-glucuronidase that is encoded in the genome of Escherichia coli K-12. [OMA:P05804, PRO:DNx] | Escherichia coli K-12 |
| Chitotriosidase-1 | A chitotriosidase-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q13231] | Homo sapiens (human) |
| Cytosolic endo-beta-N-acetylglucosaminidase | A cytosolic endo-beta-N-acetylglucosaminidase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8NFI3] | Homo sapiens (human) |
| Chitotriosidase-1 | A chitotriosidase-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q13231] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| theophylline | dimethylxanthine | adenosine receptor antagonist; anti-asthmatic drug; anti-inflammatory agent; bronchodilator agent; drug metabolite; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; fungal metabolite; human blood serum metabolite; immunomodulator; muscle relaxant; vasodilator agent | |
| caffeine | purine alkaloid; trimethylxanthine | adenosine A2A receptor antagonist; adenosine receptor antagonist; adjuvant; central nervous system stimulant; diuretic; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; environmental contaminant; food additive; fungal metabolite; geroprotector; human blood serum metabolite; mouse metabolite; mutagen; plant metabolite; psychotropic drug; ryanodine receptor agonist; xenobiotic | |
| lansoprazole | Lansoprazole: A 2,2,2-trifluoroethoxypyridyl derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS. Lansoprazole is a racemic mixture of (R)- and (S)-isomers. | benzimidazoles; pyridines; sulfoxide | anti-ulcer drug; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor |
| omeprazole | 5-methoxy-2-{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole : A member of the class of benzimidazoles that is 1H-benzimidazole which is substituted by a [4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl group at position 2 and a methoxy group at position 5. omeprazole : A racemate comprising equimolar amounts of (R)- and (S)-omeprazole. Omeprazole: A 4-methoxy-3,5-dimethylpyridyl, 5-methoxybenzimidazole derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits an H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS. | aromatic ether; benzimidazoles; pyridines; sulfoxide | |
| pentoxifylline | oxopurine | ||
| rabeprazole | Rabeprazole: A 4-(3-methoxypropoxy)-3-methylpyridinyl derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS. | benzimidazoles; pyridines; sulfoxide | anti-ulcer drug; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor |
| dehydroepiandrosterone | dehydroepiandrosterone : An androstanoid that is androst-5-ene substituted by a beta-hydroxy group at position 3 and an oxo group at position 17. It is a naturally occurring steroid hormone produced by the adrenal glands. Dehydroepiandrosterone: A major C19 steroid produced by the ADRENAL CORTEX. It is also produced in small quantities in the TESTIS and the OVARY. Dehydroepiandrosterone (DHEA) can be converted to TESTOSTERONE; ANDROSTENEDIONE; ESTRADIOL; and ESTRONE. Most of DHEA is sulfated (DEHYDROEPIANDROSTERONE SULFATE) before secretion. | 17-oxo steroid; 3beta-hydroxy-Delta(5)-steroid; androstanoid | androgen; human metabolite; mouse metabolite |
| androstenedione | androst-4-ene-3,17-dione : A 3-oxo Delta(4)-steroid that is androst-4-ene substituted by oxo groups at positions 3 and 17. It is a steroid hormone synthesized in the adrenal glands and gonads. Androstenedione: A delta-4 C19 steroid that is produced not only in the TESTIS, but also in the OVARY and the ADRENAL CORTEX. Depending on the tissue type, androstenedione can serve as a precursor to TESTOSTERONE as well as ESTRONE and ESTRADIOL. | 17-oxo steroid; 3-oxo-Delta(4) steroid; androstanoid | androgen; Daphnia magna metabolite; human metabolite; mouse metabolite |
| glycyrrhetinic acid | cyclic terpene ketone; hydroxy monocarboxylic acid; pentacyclic triterpenoid | immunomodulator; plant metabolite | |
| glycyrrhizic acid | glycyrrhizinic acid : A triterpenoid saponin that is the glucosiduronide derivative of 3beta-hydroxy-11-oxoolean-12-en-30-oic acid. | enone; glucosiduronic acid; pentacyclic triterpenoid; tricarboxylic acid; triterpenoid saponin | EC 3.4.21.5 (thrombin) inhibitor; plant metabolite |
| methyl methanethiosulfinate | methyl methanethiosulfinate: structure in first source; a metabolite of S-methyl cysteine sulfoxide | sulfur oxoacid derivative | |
| argadin | argadin: a chitinase inhibitor, produced by Clonostachys sp. FO-7314; structure in first source | ||
| argifin | argifin: possible lead insecticide; isolated from Gliocladium; structure in first source | ||
| tenatoprazole | Tenatoprazole: structure in first source | imidazopyridine | |
| kuwanon g | kuwanon G: a non-peptide bombesin receptor antagonist; RN refers to (1S-(1alpha,5alpha,6beta))-isomer; structure given in first source kuwanone G : A tetrahydroxyflavone isolated from the root barks of Morus alba and has been shown to exhibit anti-inflammatory activity. | resorcinols; tetrahydroxyflavone | anti-inflammatory agent; plant metabolite |
| dexlansoprazole | Dexlansoprazole: The R-isomer of lansoprazole that is used to treat severe GASTROESOPHAGEAL REFLUX DISEASE. | benzimidazoles; sulfoxide |