Target type: biologicalprocess
The acetylation of the N-terminal lysine of proteins. [GOC:ai]
N-terminal peptidyl-lysine acetylation is a post-translational modification (PTM) that involves the addition of an acetyl group (CH3CO) to the ε-amino group of a lysine residue at the N-terminus of a protein. This modification plays a crucial role in regulating a wide range of cellular processes, including protein stability, localization, activity, and interactions with other proteins. The process is catalyzed by N-terminal acetyltransferases (NATs), a family of enzymes that utilize acetyl-CoA as the acetyl donor.
The mechanism of N-terminal acetylation begins with the binding of the NAT to the N-terminus of the target protein. The acetyl group from acetyl-CoA is then transferred to the ε-amino group of the lysine residue, forming an N-acetyllysine residue. The acetylation reaction is highly specific and is typically restricted to the first few amino acids at the N-terminus.
The biological significance of N-terminal acetylation is multifaceted:
1. Protein Stability: N-terminal acetylation can enhance protein stability by protecting the N-terminus from proteolytic degradation. This is particularly important for proteins that are exposed to the cellular environment, such as those on the cell surface.
2. Protein Localization: N-terminal acetylation can influence the subcellular localization of proteins. For example, some proteins require N-terminal acetylation for their proper targeting to specific organelles.
3. Protein Activity: N-terminal acetylation can modulate the activity of proteins. In some cases, acetylation can activate a protein, while in other cases, it can inhibit its activity.
4. Protein Interactions: N-terminal acetylation can affect the interactions of proteins with other molecules. For example, acetylation can create or disrupt binding sites for other proteins, thereby influencing the formation of protein complexes.
The regulation of N-terminal acetylation is complex and involves a variety of factors, including the availability of acetyl-CoA, the activity of NATs, and the sequence of the N-terminal region of the protein. Dysregulation of N-terminal acetylation has been implicated in a number of diseases, including cancer and neurodegenerative disorders.
Overall, N-terminal peptidyl-lysine acetylation is a critical PTM that plays a central role in regulating a diverse range of cellular processes.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Histone acetyltransferase KAT2B | A histone acetyltransferase KAT2B that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q92831] | Homo sapiens (human) |
| CREB-binding protein | A CREB-binding protein that is encoded in the genome of human. [PMID:11331617] | Homo sapiens (human) |
| Histone acetyltransferase p300 | A histone acetyltransferase p300 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q09472] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| 4-aminophenol | 4-aminophenol : An amino phenol (one of the three possible isomers) which has the single amino substituent located para to the phenolic -OH group. 4-aminophenol: RN given refers to parent cpd | aminophenol | allergen; metabolite |
| altretamine | Altretamine: A hexamethyl-2,4,6-triamine derivative of 1,3,5-triazine. | triamino-1,3,5-triazine | |
| cgs 15943 | 9-chloro-2-(2-furyl)-(1,2,4)triazolo(1,5-c)quinazolin-5-imine: non-xanthine triazoloquinazoline adenosine antagonist CGS 15943 : A member of the class of triazoloquinazolines that is [1,2,4]triazolo[1,5-c]quinazoline substited at positions 2, 5 and 9 by furan-2-yl, amino and chloro groups respectively. A potent antagonist at adenosine A1 and adenosine A2A receptors. | aromatic amine; biaryl; furans; organochlorine compound; primary amino compound; quinazolines; triazoloquinazoline | adenosine A1 receptor antagonist; adenosine A2A receptor antagonist; antineoplastic agent; central nervous system stimulant |
| embelin | embelin : A member of the class of dihydroxy-1,4-benzoquinones that is 2,5-dihydroxy-1,4-benzoquinone which is substituted by an undecyl group at position 3. Isolated from Lysimachia punctata and Embelia ribes, it exhibits antimicrobial, antineoplastic and inhibitory activity towards hepatitis C protease. embelin: from Embelia fruit (Myrsinaceae) | dihydroxy-1,4-benzoquinones | antimicrobial agent; antineoplastic agent; hepatitis C protease inhibitor; plant metabolite |
| etazolate | etazolate : A pyrazolopyridine that is 1H-pyrazolo[3,4-b]pyridine which is substituted at positions 1, 4, and 5 by ethyl, 2-isopropylidenehydrazino, and ethoxycarbonyl groups, respectively. A phosphodiesterase IV inhibitor with antidepressant and anxiolytic properties. Etazolate: A potent phosphodiesterase inhibitor proposed as an antipsychotic agent. | ethyl ester; hydrazone; pyrazolopyridine | alpha-secretase activator; antidepressant; antipsychotic agent; anxiolytic drug; GABA agent; neuroprotective agent; phosphodiesterase IV inhibitor |
| nocodazole | aromatic ketone; benzimidazoles; carbamate ester; thiophenes | antimitotic; antineoplastic agent; microtubule-destabilising agent; tubulin modulator | |
| papaverine | papaverine : A benzylisoquinoline alkaloid that is isoquinoline substituted by methoxy groups at positions 6 and 7 and a 3,4-dimethoxybenzyl group at position 1. It has been isolated from Papaver somniferum. Papaverine: An alkaloid found in opium but not closely related to the other opium alkaloids in its structure or pharmacological actions. It is a direct-acting smooth muscle relaxant used in the treatment of impotence and as a vasodilator, especially for cerebral vasodilation. The mechanism of its pharmacological actions is not clear, but it apparently can inhibit phosphodiesterases and it may have direct actions on calcium channels. | benzylisoquinoline alkaloid; dimethoxybenzene; isoquinolines | antispasmodic drug; vasodilator agent |
| ici 136,753 | pyrazolopyridine | ||
| 3-(5'-hydroxymethyl-2'-furyl)-1-benzylindazole | 3-(5'-hydroxymethyl-2'-furyl)-1-benzylindazole: antineoplastic; activates platelet guanylate cyclase; a radiosensitizing agent and guanylate cyclase activator; structure in first source lificiguat : A member of the class of indazoles that is 1H-indazole which is substituted by a benzyl group at position 1 and a 5-(hydroxymethyl)-2-furyl group at position 3. It is an activator of soluble guanylate cyclase and inhibits platelet aggregation. | aromatic primary alcohol; furans; indazoles | antineoplastic agent; apoptosis inducer; platelet aggregation inhibitor; soluble guanylate cyclase activator; vasodilator agent |
| colchicine | (S)-colchicine : A colchicine that has (S)-configuration. It is a secondary metabolite, has anti-inflammatory properties and is used to treat gout, crystal-induced joint inflammation, familial Mediterranean fever, and many other conditions. | alkaloid; colchicine | anti-inflammatory agent; gout suppressant; mutagen |
| plumbagin | plumbagin : A hydroxy-1,4-naphthoquinone that is 1,4-naphthoquinone in which the hydrogens at positions 2 and 5 are substituted by methyl and hydroxy groups, respectively. plumbagin: a superoxide anion generator | hydroxy-1,4-naphthoquinone; phenols | anticoagulant; antineoplastic agent; immunological adjuvant; metabolite |
| ferrocin c | N-methyl-2-quinolone: structure in first source | ||
| n-methylpyrrolidone | 1-methylpyrrolidin-2-one: structure in first source N-methylpyrrolidin-2-one : A member of the class of pyrrolidine-2-ones that is pyrrolidin-2-one in which the hydrogen attached to the nitrogen is replaced by a methyl group. | lactam; N-alkylpyrrolidine; pyrrolidin-2-ones | polar aprotic solvent |
| palmatine | burasaine: structure in first source | berberine alkaloid; organic heterotetracyclic compound | plant metabolite |
| 4-Methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one | benzodiazepine | ||
| epigallocatechin gallate | (-)-epigallocatechin 3-gallate : A gallate ester obtained by the formal condensation of gallic acid with the (3R)-hydroxy group of (-)-epigallocatechin. epigallocatechin gallate: a steroid 5alpha-reductase inhibitor and antimutagen in green tea (Camellia sinensis) | flavans; gallate ester; polyphenol | antineoplastic agent; antioxidant; apoptosis inducer; geroprotector; Hsp90 inhibitor; neuroprotective agent; plant metabolite |
| delphinidin | delphinidin chloride : An anthocyanidin chloride that has delphinidin as the cationic counterpart. Paraffin: A mixture of solid hydrocarbons obtained from petroleum. It has a wide range of uses including as a stiffening agent in ointments, as a lubricant, and as a topical anti-inflammatory. It is also commonly used as an embedding material in histology. | anthocyanidin chloride | |
| haloprogin | venenatine: RN given for (3beta,16beta,17beta,20alpha)-isomer; structure in first source | ||
| taxodione | taxodione: structure | diterpenoid | |
| coenzyme a | adenosine 3',5'-bisphosphate | coenzyme; Escherichia coli metabolite; mouse metabolite | |
| c.i. direct red 23 | C.I. Direct Red 23: azo dye; structure in first source | ||
| oxoglaucine | 1,2,9,10-tetramethoxy-7H-dibenzo(de,g)quinolin-7-one: a phosphatidylinositol 3-kinase p110alpha inhibitor that reactivates latent HIV-1; structure in first source | isoquinoline alkaloid | |
| n-(4-(7-diethylamino-4-methylcoumarin-3-yl)phenyl)maleimide | 7-diethylamino-3-(4-maleimidophenyl)-4-methylcoumarin : A member of the class of coumarins that is 2H-chromen-2-one substituted by 4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)phenyl, methyl, and diethylamino groups at positions 3, 4 and 7, respectively. It is a thiol-reactive fluorescent dye. N-(4-(7-diethylamino-4-methylcoumarin-3-yl)phenyl)maleimide: structure given in first source | benzenes; coumarins; maleimides; tertiary amino compound | fluorescent dye |
| anacardic acid | anacardic acid : A hydroxybenzoic acid that is salicylic acid substituted by a pentadecyl group at position 6. It is a major component of cashew nut shell liquid and exhibits an extensive range of bioactivities. anacardic acid: isolated from Anacardium occidentale; monophenol monooxygenase inhibitor | hydroxy monocarboxylic acid; hydroxybenzoic acid | anti-inflammatory agent; antibacterial agent; anticoronaviral agent; apoptosis inducer; EC 2.3.1.48 (histone acetyltransferase) inhibitor; EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor; neuroprotective agent; plant metabolite |
| mrs 1220 | 9-chloro-2-(2-furyl)-5-phenylacetylamino(1,2,4)triazolo(1,5-c)quinazoline: structure in first source | quinazolines | |
| rolipram | (-)-rolipram : The (R)-enantiomer of rolipram. | rolipram | |
| 2-methyl-2,3,4,5-tetrahydro-1,5-benzoxazepin-4-one | organonitrogen heterocyclic compound; oxacycle | ||
| methyl indole-3-carboxylate | methyl indole-3-carboxylate : The methyl ester of indole-3-carboxylic acid. | indoles; methyl ester | metabolite |
| 2-(3-Chloro-2-fluorophenyl)-2,3-dihydroisothiazol-3-one | organofluorine compound | ||
| 4-(1H-benzimidazol-2-ylmethylthio)-2-methylbenzofuro[3,2-d]pyrimidine | benzimidazoles | ||
| 2-(4-benzofuro[3,2-d]pyrimidinylthio)-1-thiophen-2-ylethanone | benzofurans | ||
| curcumin | curcumin : A beta-diketone that is methane in which two of the hydrogens are substituted by feruloyl groups. A natural dyestuff found in the root of Curcuma longa. Curcumin: A yellow-orange dye obtained from tumeric, the powdered root of CURCUMA longa. It is used in the preparation of curcuma paper and the detection of boron. Curcumin appears to possess a spectrum of pharmacological properties, due primarily to its inhibitory effects on metabolic enzymes. | aromatic ether; beta-diketone; diarylheptanoid; enone; polyphenol | anti-inflammatory agent; antifungal agent; antineoplastic agent; biological pigment; contraceptive drug; dye; EC 1.1.1.205 (IMP dehydrogenase) inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor; EC 1.8.1.9 (thioredoxin reductase) inhibitor; EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; flavouring agent; food colouring; geroprotector; hepatoprotective agent; immunomodulator; iron chelator; ligand; lipoxygenase inhibitor; metabolite; neuroprotective agent; nutraceutical; radical scavenger |
| 4-[2-(9-methyl-6-indolo[3,2-b]quinoxalinyl)ethyl]morpholine | quinoxaline derivative | ||
| umi-77 | UMI-77: an Mcl-1 inhibitor; structure in first source | ||
| N-[4,6-bis(4-morpholinyl)-1,3,5-triazin-2-yl]-2-(methylthio)-1,3-benzothiazol-6-amine | benzothiazoles | ||
| cyqualon | cyclovalone: is a synthetic curcumin derivative; structure in first source | ||
| fisetin | 3'-hydroxyflavonoid; 7-hydroxyflavonol; tetrahydroxyflavone | anti-inflammatory agent; antioxidant; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; geroprotector; metabolite; plant metabolite | |
| guttiferone e | guttiferone E: isolated from the fruits of Garcinia pyrifera collected in Malaysia; structure in first source | ||
| 2-hydroxy-6-[(8Z,11Z)-pentadeca-8,11,14-trien-1-yl]benzoic acid | hydroxybenzoic acid | ||
| 6h-thieno[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepine-6-acetamide, 4-(4-chlorophenyl)-n-(4-hydroxyphenyl)-2,3,9-trimethyl-, (6s)- | organonitrogen heterocyclic compound; organosulfur heterocyclic compound | ||
| chetomin | |||
| cambogin | isogarcinol: has immunosuppresant activity; isolated from Garcinia mangostana; structure in first source | ||
| icg 001 | peptide | ||
| 3,4-dimethoxy-n-((2,2-dimethyl-2h-chromen-6-yl)methyl)-n-phenylbenzenesulfonamide | 3,4-dimethoxy-N-((2,2-dimethyl-2H-chromen-6-yl)methyl)-N-phenylbenzenesulfonamide: has antineoplastic activity; structure in first source | ||
| jq1 compound | carboxylic ester; organochlorine compound; tert-butyl ester; thienotriazolodiazepine | angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; apoptosis inducer; bromodomain-containing protein 4 inhibitor; cardioprotective agent; ferroptosis inducer | |
| gsk525762a | molibresib: mimicks acetylated histones; structure in first source | benzodiazepine | |
| gsk1210151a | GSK1210151A: inhibitor of the BET family of proteins; structure in first source | imidazoquinoline | |
| i-bet726 | |||
| 2-methoxy-n-(3-methyl-2-oxo-1,2,3,4-tetrahydroquinazolin-6-yl)benzenesulfonamide | 2-methoxy-N-(3-methyl-2-oxo-1,2,3,4-tetrahydroquinazolin-6-yl)benzenesulfonamide: a probe for bromo and extra C-terminal domain proteins; structure in first source | quinazolines | |
| 1,2-bis(isothiazol-5-yl)disulfane | 1,2-bis(isothiazol-5-yl)disulfane: structure in first source | ||
| rvx 208 | apabetalone: a bromodomain and extra-terminal domain protein (BET) inhibitor; prevents interactions between BET proteins and acetyl-lysine residues on histone tails to modify epigenetic regulation |