Target type: molecularfunction
Catalysis of the hydrolysis of any glycosyl bond. [GOC:jl]
Hydrolase activity, acting on glycosyl bonds, encompasses a broad range of enzymatic reactions that cleave glycosidic bonds between sugar molecules. These bonds link monosaccharide units to form complex carbohydrates like oligosaccharides, polysaccharides, and glycoconjugates. Hydrolases catalyze the hydrolysis of these bonds, breaking them down by adding a water molecule. This process releases the individual sugar units, enabling the breakdown and utilization of carbohydrates in various biological processes.
Hydrolases exhibiting this activity can be categorized based on their substrate specificity, acting on specific types of glycosidic bonds. For example, some hydrolases specifically target alpha-1,4-glycosidic bonds found in starch, while others cleave beta-1,4-glycosidic bonds present in cellulose.
The molecular mechanism underlying this activity involves the enzyme's active site, a region that binds to the glycosidic bond and facilitates its cleavage. This site often contains specific amino acid residues that interact with the substrate, contributing to its precise positioning and catalysis. These residues can include acidic amino acids, such as aspartate or glutamate, which participate in proton transfer during the hydrolysis process.
Hydrolase activity, acting on glycosyl bonds, plays crucial roles in various cellular processes, including:
* **Carbohydrate metabolism:** Breaking down complex carbohydrates into simpler sugars for energy production.
* **Glycoconjugate processing:** Modifying and degrading glycoproteins, glycolipids, and other glycoconjugates involved in cell signaling and recognition.
* **Digestion:** Breaking down dietary carbohydrates into absorbable sugars in the digestive tract.
* **Immune response:** Degrading bacterial cell wall polysaccharides, contributing to immune defense.
These enzymes are essential for maintaining cellular homeostasis and carrying out vital physiological functions.'
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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 |
| Formamidopyrimidine-DNA glycosylase | A formamidopyrimidine-DNA glycosylase that is encoded in the genome of Escherichia coli K-12. [PRO:DNx, UniProtKB:P05523] | Escherichia coli K-12 |
| Beta-galactosidase | A bacterial-type beta-galactosidase that is encoded in the genome of Escherichia coli K-12. [PRO:DAN, UniProtKB:P00722] | Escherichia coli K-12 |
| Sphingomyelin phosphodiesterase | [no definition available] | Bos taurus (cattle) |
| Endonuclease 8-like 1 | An endonuclease 8-like 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96FI4] | Homo sapiens (human) |
| Sphingomyelin phosphodiesterase | A sphingomyelin phosphodiesterase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P17405] | Homo sapiens (human) |
| ADP-ribose glycohydrolase MACROD2 | An ADP-ribose glycohydrolase MACROD2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:A1Z1Q3] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| chlorpromazine | chlorpromazine : A substituted phenothiazine in which the ring nitrogen at position 10 is attached to C-3 of an N,N-dimethylpropanamine moiety. Chlorpromazine: The prototypical phenothiazine antipsychotic drug. Like the other drugs in this class chlorpromazine's antipsychotic actions are thought to be due to long-term adaptation by the brain to blocking DOPAMINE RECEPTORS. Chlorpromazine has several other actions and therapeutic uses, including as an antiemetic and in the treatment of intractable hiccup. | organochlorine compound; phenothiazines; tertiary amine | anticoronaviral agent; antiemetic; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; phenothiazine antipsychotic drug |
| fendiline | Fendiline: Coronary vasodilator; inhibits calcium function in muscle cells in excitation-contraction coupling; proposed as antiarrhythmic and antianginal agents. | diarylmethane | |
| imipramine | imipramine : A dibenzoazepine that is 5H-dibenzo[b,f]azepine substituted by a 3-(dimethylamino)propyl group at the nitrogen atom. Imipramine: The prototypical tricyclic antidepressant. It has been used in major depression, dysthymia, bipolar depression, attention-deficit disorders, agoraphobia, and panic disorders. It has less sedative effect than some other members of this therapeutic group. | dibenzoazepine | adrenergic uptake inhibitor; antidepressant; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor |
| isoniazid | Hydra: A genus of freshwater polyps in the family Hydridae, order Hydroida, class HYDROZOA. They are of special interest because of their complex organization and because their adult organization corresponds roughly to the gastrula of higher animals. hydrazide : Compounds derived from oxoacids RkE(=O)l(OH)m (l =/= 0) by replacing -OH by -NRNR2 (R groups are commonly H). (IUPAC). | carbohydrazide | antitubercular agent; drug allergen |
| 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 | |
| dihydralazine | Dihydralazine: 1,4-Dihydrazinophthalazine. An antihypertensive agent with actions and uses similar to those of HYDRALAZINE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p354) | phthalazines | |
| 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 | |
| 1,4-dideoxy-1,4-iminoarabinitol | 1,4-dideoxy-1,4-iminoarabinitol: RN given refers to (2S-(2alpha,3beta,4alpha))-isomer; structure given in first source | ||
| inositol 2,4,6-triphosphate | |||
| isopropyl thiogalactoside | isopropyl beta-D-thiogalactopyranoside : An S-glycosyl compound consisting of beta-D-1-thiogalactose having an isopropyl group attached to the anomeric sulfur. Isopropyl Thiogalactoside: A non-metabolizable galactose analog that induces expression of the LAC OPERON. | S-glycosyl compound | |
| 2-(1-benzo[e]benzofuranyl)-N-[4-methoxy-3-(4-morpholinylsulfonyl)phenyl]acetamide | naphthofuran | ||
| mangostin | alpha-mangostin : A member of the class of xanthones that is 9H-xanthene substituted by hydroxy group at positions 1, 3 and 6, a methoxy group at position 7, an oxo group at position 9 and prenyl groups at positions 2 and 8. Isolated from the stems of Cratoxylum cochinchinense, it exhibits antioxidant, antimicrobial and antitumour activities. mangostin: xanthone from rind of Garcinia mangostana Linn. fruit | aromatic ether; phenols; xanthones | antimicrobial agent; antineoplastic agent; antioxidant; plant metabolite |
| 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 |