peptidyl-lysine demalonylation
Definition
Target type: biologicalprocess
The process of removing a malonyl group (CO-CH2-CO) from an malonylated lysine residue in a peptide or protein. [GOC:sp, PMID:22076378]
Peptidyl-lysine demalonylation is a crucial post-translational modification that plays a vital role in various cellular processes, including protein function, signaling, and cellular stress response. This enzymatic reaction involves the removal of malonyl groups (CH2CO2-) from lysine residues within proteins, a process catalyzed by specific enzymes called demalonyltransferases.
Malonylation, the addition of malonyl groups to proteins, is an emerging post-translational modification that can impact protein stability, activity, and interactions with other molecules. Demalonylation acts as a counterbalancing mechanism, regulating the levels of malonylated proteins and controlling their function.
The biological process of peptidyl-lysine demalonylation can be summarized in the following steps:
1. **Substrate Recognition**: The demalonyltransferase recognizes and binds to the malonylated lysine residue on the target protein. The enzyme's active site is specifically designed to interact with the malonyl group and the surrounding amino acid sequence.
2. **Hydrolysis**: The demalonyltransferase catalyzes the hydrolysis of the malonyl-lysine bond, breaking the connection between the malonyl group and the lysine residue. This reaction typically involves the transfer of a water molecule to the malonyl group, resulting in the release of malonic acid.
3. **Product Release**: The demalonylated protein is released from the enzyme, and the malonic acid is either degraded or used in other metabolic pathways.
Demalonylation is a dynamic process that is tightly regulated by various factors, including cellular stress, nutrient availability, and the presence of specific signaling molecules. Disruption of this process can lead to various cellular malfunctions, including impaired protein function, altered cellular signaling, and increased susceptibility to stress.
Studies have implicated demalonylation in a diverse range of biological functions, including:
* **Metabolic Regulation**: Demalonylation has been linked to the regulation of metabolic pathways, such as glucose metabolism and lipid synthesis, through its effects on enzymes involved in these processes.
* **Cellular Stress Response**: Demalonylation plays a critical role in the cellular stress response, helping cells adapt to environmental challenges, such as oxidative stress and nutrient deprivation.
* **Signal Transduction**: Demalonylation can influence signal transduction pathways by modulating the activity of signaling proteins, thereby affecting cellular communication and responses to external stimuli.
* **Gene Expression**: Demalonylation may also play a role in regulating gene expression by affecting the activity of transcription factors or other proteins involved in gene regulation.
Further research on peptidyl-lysine demalonylation is essential to fully understand its diverse roles in biological processes and its potential implications for human health and disease.'
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Proteins (2)
| Protein | Definition | Taxonomy |
|---|---|---|
| NAD-dependent protein deacetylase sirtuin-7 | An NAD-dependent protein deacetylase sirtuin-7 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NRC8] | Homo sapiens (human) |
| NAD-dependent protein deacylase sirtuin-5, mitochondrial | An NAD-dependent deacetylase sirtuin-5 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NXA8] | Homo sapiens (human) |
Compounds (29)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| niacinamide | nicotinamide : A pyridinecarboxamide that is pyridine in which the hydrogen at position 3 is replaced by a carboxamide group. | pyridine alkaloid; pyridinecarboxamide; vitamin B3 | anti-inflammatory agent; antioxidant; cofactor; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; Escherichia coli metabolite; geroprotector; human urinary metabolite; metabolite; mouse metabolite; neuroprotective agent; Saccharomyces cerevisiae metabolite; Sir2 inhibitor |
| anthralin | anthralin : An anthracene compound derived by the substitution of -OH groups for hydrogen at C-1 and C-8, and with an oxo group at C-9. Anthralin: An anthracene derivative that disrupts MITOCHONDRIA function and structure and is used for the treatment of DERMATOSES, especially PSORIASIS. It may cause FOLLICULITIS. | anthracenes | antipsoriatic |
| valproic acid | valproic acid : A branched-chain saturated fatty acid that comprises of a propyl substituent on a pentanoic acid stem. Valproic Acid: A fatty acid with anticonvulsant and anti-manic properties that is used in the treatment of EPILEPSY and BIPOLAR DISORDER. The mechanisms of its therapeutic actions are not well understood. It may act by increasing GAMMA-AMINOBUTYRIC ACID levels in the brain or by altering the properties of VOLTAGE-GATED SODIUM CHANNELS. | branched-chain fatty acid; branched-chain saturated fatty acid | anticonvulsant; antimanic drug; EC 3.5.1.98 (histone deacetylase) inhibitor; GABA agent; neuroprotective agent; psychotropic drug; teratogenic agent |
| 4-phenylbutyric acid | 4-phenylbutyric acid : A monocarboxylic acid the structure of which is that of butyric acid substituted with a phenyl group at C-4. It is a histone deacetylase inhibitor that displays anticancer activity. It inhibits cell proliferation, invasion and migration and induces apoptosis in glioma cells. It also inhibits protein isoprenylation, depletes plasma glutamine, increases production of foetal haemoglobin through transcriptional activation of the gamma-globin gene and affects hPPARgamma activation. 4-phenylbutyric acid: RN refers to the parent cpd | monocarboxylic acid | antineoplastic agent; apoptosis inducer; EC 3.5.1.98 (histone deacetylase) inhibitor; prodrug |
| probucol | probucol : A dithioketal that is propane-2,2-dithiol in which the hydrogens attached to both sulfur atoms are replaced by 3,5-di-tert-butyl-4-hydroxyphenyl groups. An anticholesteremic drug with antioxidant and anti-inflammatory properties, it is used to treat high levels of cholesterol in blood. Probucol: A drug used to lower LDL and HDL cholesterol yet has little effect on serum-triglyceride or VLDL cholesterol. (From Martindale, The Extra Pharmacopoeia, 30th ed, p993). | dithioketal; polyphenol | anti-inflammatory drug; anticholesteremic drug; antilipemic drug; antioxidant; cardiovascular drug |
| fenofibrate | benzochromenone; delta-lactone; naphtho-alpha-pyrone | platelet aggregation inhibitor; Sir2 inhibitor | |
| vorinostat | vorinostat : A dicarboxylic acid diamide comprising suberic (octanedioic) acid coupled to aniline and hydroxylamine. A histone deacetylase inhibitor, it is marketed under the name Zolinza for the treatment of cutaneous T cell lymphoma (CTCL). Vorinostat: A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME. | dicarboxylic acid diamide; hydroxamic acid | antineoplastic agent; apoptosis inducer; EC 3.5.1.98 (histone deacetylase) inhibitor |
| suramin | suramin : A member of the class of phenylureas that is urea in which each of the amino groups has been substituted by a 3-({2-methyl-5-[(4,6,8-trisulfo-1-naphthyl)carbamoyl]phenyl}carbamoyl)phenyl group. An activator of both the rabbit skeletal muscle RyR1 and sheep cardiac RyR2 isoform ryanodine receptor channels, it has been used for the treatment of human African trypanosomiasis for over 100 years. Suramin: A polyanionic compound with an unknown mechanism of action. It is used parenterally in the treatment of African trypanosomiasis and it has been used clinically with diethylcarbamazine to kill the adult Onchocerca. (From AMA Drug Evaluations Annual, 1992, p1643) It has also been shown to have potent antineoplastic properties. | naphthalenesulfonic acid; phenylureas; secondary carboxamide | angiogenesis inhibitor; antinematodal drug; antineoplastic agent; apoptosis inhibitor; EC 2.7.11.13 (protein kinase C) inhibitor; GABA antagonist; GABA-gated chloride channel antagonist; purinergic receptor P2 antagonist; ryanodine receptor agonist; trypanocidal drug |
| rhein | dihydroxyanthraquinone | ||
| oleanolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | plant metabolite | |
| closantel | closantel : A racemate comprising equimolar amounts of (R)- and (S)-clostanel. An anthelmintic, it is used (as the dihydrate of the sodium salt) in veterinary medicine for the treatment of fluke and nematode infections. closantel: structure N-{5-chloro-4-[(4-chlorophenyl)(cyano)methyl]-2-methylphenyl}-2-hydroxy-3,5-diiodobenzamide : An aromatic amide resulting from the formal condensation of the carboxy group of 3,5-diiodosalicylic acid with the amino group of aniline substituted at positions 2, 4, and 5 by methyl, (4-chlorophenyl)(cyano)methyl, and methyl groups respectively. | aromatic amide; monocarboxylic acid amide; monochlorobenzenes; nitrile; organoiodine compound; phenols | |
| balsalazide | balsalazide : A monohydroxybenzoic acid consisting of 5-aminosalicylic acid (mesalazine) linked to 4-aminobenzoyl-beta-alanine via an azo bond. balsalazide: a mesalamine 5-aminosalicylate prodrug; 99% of ingested drug remains intact through the stomach and is delivered to and activated in the colon; used for inflammatory bowel disease, ulcerative colitis and radiation-induced proctosigmoiditis but avoided in patients with known hypersensitivity reaction to salicylates or mesalamine; structure in first source | ||
| echinocystic acid | triterpenoid | ||
| fulvestrant | fulvestrant : A 3-hydroxy steroid that is 17beta-estradiol in which the 7alpha hydrogen has been replaced by a nonyl group in which one of the hydrogens of the terminal methyl has been replaced by a (4,4,5,5,5-pentafluoropentyl)sulfinyl group. An estrogen receptor antagonist, it is used in the treatment of breast cancer. Fulvestrant: An estradiol derivative and estrogen receptor antagonist that is used for the treatment of estrogen receptor-positive, locally advanced or metastatic breast cancer. | 17beta-hydroxy steroid; 3-hydroxy steroid; organofluorine compound; sulfoxide | antineoplastic agent; estrogen antagonist; estrogen receptor antagonist |
| nisoxetine hydrochloride | |||
| nsc 74859 | NSC 74859: inhibits Stat3 binding activity; structure in first source S3I-201 : An amidobenzoic acid obtained by formal condensation of the carboxy group of [(4-methylbenzene-1-sulfonyl)oxy]acetic acid with the amino group of 4-amino-2-hydroxybenzoic acid. | amidobenzoic acid; monohydroxybenzoic acid; tosylate ester | STAT3 inhibitor |
| 4-(4-chloroanilino)-3-pyridinesulfonamide | pyridines; sulfonamide | ||
| 4-phenoxyphenyl 4-hydroxypiperidine-1-carboxylate | aromatic ether | ||
| sirtinol | aldimine; benzamides; naphthols | anti-inflammatory agent; EC 3.5.1.98 (histone deacetylase) inhibitor; Sir2 inhibitor | |
| cambinol | cambinol: inhibitor of human silent information regulator 2 enzymes; structure in first source | ||
| gw 7647 | GW 7647 : A monocarboxylic acid that is 2-(phenylsulfanyl)isobutyric acid in which the phenyl group is substituted at the para- position by a 3-aza-7-cyclohexylhept-1-yl group in which the nitrogen is acylated by a (cyclohexylamino)carbonyl group. GW 7647: a PPAR-alpha agonist; structure in first source | aryl sulfide; monocarboxylic acid; ureas | PPARalpha agonist |
| ex 527 | 6-chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide : A member of the class of carbazoles that is 2,3,4,9-tetrahydro-1H-carbazole which is substituted at position 1 by an aminocarbohyl group and at position 6 by a chlorine. 6-chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide: structure in first source | carbazoles; monocarboxylic acid amide; organochlorine compound | |
| n-oleoyldopamine | N-oleoyldopamine : A fatty amide resulting from the formal condensation of the carboxy group of oleic acid with the amino group of dopamine. Synthesised in catecholaminergic neurons, it crosses the blood-brain barrier and might be considered as a carrier of dopamine into the brain. It is a transient receptor potential vanilloid type 1 (TRPV1) receptor agonist. N-oleoyldopamine: putative capsaicin receptor ligand; produces hyperalgesia; isolated from the brain | catechols; fatty amide; N-(fatty acyl)-dopamine; secondary carboxamide | TRPV1 agonist |
| cefixime | cephalosporin | antibacterial drug; drug allergen | |
| panobinostat | panobinostat : A hydroxamic acid obtained by formal condensation of the carboxy group of (2E)-3-[4-({[2-(2-methylindol-3-yl)ethyl]amino}methyl)phenyl]prop-2-enoic acid with the amino group of hydroxylamine. A histone deacetylase inhibitor used (as its lactate salt) in combination with bortezomib and dexamethasone for the treatment of multiple myeloma. Panobinostat: An indole and hydroxamic acid derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used as an antineoplastic agent in combination with BORTEZOMIB and DEXAMETHASONE for the treatment of MULTIPLE MYELOMA. | cinnamamides; hydroxamic acid; methylindole; secondary amino compound | angiogenesis modulating agent; antineoplastic agent; EC 3.5.1.98 (histone deacetylase) inhibitor |
| N-[4-(2-tert-butylphenyl)sulfonylphenyl]-2,3,4-trihydroxy-5-[(2-propan-2-ylphenyl)methyl]benzamide | benzamides | ||
| quisinostat | indoles | ||
| methacycline | methacycline : A tetracycline that is the 6-methylene analogue of oxytetracycline, obtained by formal dehydration at position 6. Methacycline: A broad-spectrum semisynthetic antibiotic related to TETRACYCLINE but excreted more slowly and maintaining effective blood levels for a more extended period. | ||
| antimycin |