Target type: biologicalprocess
The methylation of peptidyl-lysine to form peptidyl-N6-methyl-L-lysine. [RESID:AA0076]
Peptidyl-lysine monomethylation is a post-translational modification (PTM) where a single methyl group (CH3) is added to the ε-amino group of a lysine residue within a protein. This process is catalyzed by specific enzymes called lysine methyltransferases (KMTs).
**Biological Process:**
1. **Substrate Recognition:** KMTs recognize specific sequence motifs and structural features within their target proteins, allowing them to selectively target particular lysine residues.
2. **Methyl Group Transfer:** The KMT enzyme utilizes a cofactor, typically S-adenosyl methionine (SAM), as the methyl group donor. SAM binds to the KMT active site, and the enzyme transfers the methyl group to the ε-amino group of the lysine residue in the target protein.
3. **Product Formation:** The methylation reaction results in the formation of monomethylated lysine (me1Lys) within the protein. The KMT enzyme then releases the product, typically a demethylated SAM molecule (S-adenosyl homocysteine or SAH).
**Biological Significance:**
Peptidyl-lysine monomethylation plays a crucial role in regulating a wide range of cellular processes, including:
* **Transcriptional Regulation:** Methylation of histone proteins, which package DNA, can alter chromatin structure and influence gene expression.
* **Signal Transduction:** Methylation of signaling proteins can modulate their activity and influence downstream signaling pathways.
* **Protein-Protein Interactions:** Methylation can alter the binding affinity of proteins to other molecules, affecting protein interactions and cellular functions.
* **Cellular Differentiation and Development:** Methylation patterns can influence cell fate decisions and development.
**Regulation:**
The activity of KMTs is tightly regulated by various mechanisms, including:
* **Transcriptional Control:** The expression levels of KMTs can be regulated by specific transcription factors.
* **Post-Translational Modifications:** KMTs themselves can be modified by phosphorylation, acetylation, or ubiquitination, influencing their activity.
* **Subcellular Localization:** The localization of KMTs to specific cellular compartments can regulate their access to target proteins.
**Dysregulation and Disease:**
Dysregulation of peptidyl-lysine monomethylation has been implicated in various diseases, including:
* **Cancer:** Aberrant methylation patterns are often observed in cancer cells, contributing to uncontrolled cell growth and tumor progression.
* **Neurological Disorders:** Dysregulation of methylation in the nervous system can lead to neurodevelopmental disorders and neurodegenerative diseases.
* **Immune Disorders:** Methylation plays a crucial role in immune cell function and development, and dysregulation can contribute to autoimmune diseases.
**Conclusion:**
Peptidyl-lysine monomethylation is a fundamental biological process that plays a diverse role in regulating various cellular functions. Its importance in health and disease makes it a vital target for future research and drug development.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| N-lysine methyltransferase SMYD2 | An N-lysine methyltransferase SMYD2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NRG4] | Homo sapiens (human) |
| N-lysine methyltransferase KMT5A | An N-lysine methyltransferase KMT5A that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NQR1] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase EHMT1 | A histone-lysine N-methyltransferase, H3 lysine-9 specific 5 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9H9B1] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SETD7 | A histone-lysine N-methyltransferase SETD7 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8WTS6] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| cyproheptadine | cyproheptadine : The product resulting from the formal oxidative coupling of position 5 of 5H-dibenzo[a,d]cycloheptene with position 4 of 1-methylpiperidine resulting in the formation of a double bond between the two fragments. It is a sedating antihistamine with antimuscarinic and calcium-channel blocking actions. It is used (particularly as the hydrochloride sesquihydrate) for the relief of allergic conditions including rhinitis, conjunctivitis due to inhalant allergens and foods, urticaria and angioedema, and in pruritic skin disorders. Unlike other antihistamines, it is also a seratonin receptor antagonist, making it useful in conditions such as vascular headache and anorexia. Cyproheptadine: A serotonin antagonist and a histamine H1 blocker used as antipruritic, appetite stimulant, antiallergic, and for the post-gastrectomy dumping syndrome, etc. | piperidines; tertiary amine | anti-allergic agent; antipruritic drug; gastrointestinal drug; H1-receptor antagonist; serotonergic antagonist |
| disulfiram | organic disulfide; organosulfur acaricide | angiogenesis inhibitor; antineoplastic agent; apoptosis inducer; EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor; EC 3.1.1.1 (carboxylesterase) inhibitor; EC 3.1.1.8 (cholinesterase) inhibitor; EC 5.99.1.2 (DNA topoisomerase) inhibitor; ferroptosis inducer; fungicide; NF-kappaB inhibitor | |
| ebselen | ebselen : A benzoselenazole that is 1,2-benzoselenazol-3-one carrying an additional phenyl substituent at position 2. Acts as a mimic of glutathione peroxidase. | benzoselenazole | anti-inflammatory drug; antibacterial agent; anticoronaviral agent; antifungal agent; antineoplastic agent; antioxidant; apoptosis inducer; EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor; EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor; EC 1.3.1.8 [acyl-CoA dehydrogenase (NADP(+))] inhibitor; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; EC 2.5.1.7 (UDP-N-acetylglucosamine 1-carboxyvinyltransferase) inhibitor; EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor; EC 3.1.3.25 (inositol-phosphate phosphatase) inhibitor; EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor; EC 3.5.4.1 (cytosine deaminase) inhibitor; EC 5.1.3.2 (UDP-glucose 4-epimerase) inhibitor; enzyme mimic; ferroptosis inhibitor; genotoxin; hepatoprotective agent; neuroprotective agent; radical scavenger |
| pimethixene | pimethixene: structure | thioxanthenes | |
| thiram | thiram : An organic disulfide that results from the formal oxidative dimerisation of N,N-dimethyldithiocarbamic acid. It is widely used as a fungicidal seed treatment. Thiram: A dithiocarbamate chemical, used commercially in the rubber processing industry and as a fungicide. In vivo studies indicate that it inactivates the enzyme GLUTATHIONE REDUCTASE. It has mutagenic activity and may induce chromosomal aberrations. | organic disulfide | antibacterial drug; antifungal agrochemical; antiseptic drug |
| cystamine dihydrochloride | |||
| cysteamine | cysteamine : An amine that consists of an ethane skeleton substituted with a thiol group at C-1 and an amino group at C-2. Cysteamine: A mercaptoethylamine compound that is endogenously derived from the COENZYME A degradative pathway. The fact that cysteamine is readily transported into LYSOSOMES where it reacts with CYSTINE to form cysteine-cysteamine disulfide and CYSTEINE has led to its use in CYSTINE DEPLETING AGENTS for the treatment of CYSTINOSIS. | amine; thiol | geroprotector; human metabolite; mouse metabolite; radiation protective agent |
| lawsone | lawsone : 1,4-Naphthoquinone carrying a hydroxy function at C-2. It is obtained from the leaves of Lawsonia inermis. lawsone: a molluscacide from leaves of Lawsonia inermis L. topical sunscreening agent; structure; powdered leaves of Lawsonia inermis(Lythraceae) used as brown hair dye | ||
| 9,10-anthraquinone | 9,10-anthraquinone : An anthraquinone that is anthracene in which positions 9 and 10 have been oxidised to carbonyls. | anthraquinone | |
| 1,4-naphthoquinone | 1,4-naphthoquinone : The parent structure of the family of 1,4-naphthoquinones, in which the oxo groups of the quinone moiety are at positions 1 and 4 of the naphthalene ring. Derivatives have pharmacological properties. naphthoquinone : A polycyclic aromatic ketone metabolite of naphthalene. | 1,4-naphthoquinones | |
| ninhydrin | ninhydrin : A member of the class of indanones that is indane-1,3-dione bearing two additional hydroxy substituents at position 2. Ninhydrin: 2,2-Dihydroxy-1H-indene-1,3-(2H)-dione. Reagent toxic to skin and mucus membranes. It is used in chemical assay for peptide bonds, i.e., protein determinations and has radiosensitizing properties. | aromatic ketone; beta-diketone; indanones; ketone hydrate | colour indicator; human metabolite |
| diphenyldiselenide | diphenyldiselenide: structure given in first source | ||
| 2-methoxy-1,4-naphthoquinone | 2-methoxy-1,4-naphthoquinone : A naphthoquinone that is naphthalene-1,4-dione substituted by a methoxy group at position 2. It has been isolated from the roots of Rubia yunnanensis. 2-methoxy-1,4-naphthoquinone: isolated from Swertia calycina; structure in first source | 1,4-naphthoquinones; enol ether | antimicrobial agent; metabolite; plant metabolite |
| benzeneseleninic acid | benzeneseleninic acid: structure given in first source | ||
| sodium selenate | sodium selenate : An inorganic sodium salt having selenate as the counterion. | inorganic sodium salt | anticonvulsant; EC 3.1.3.48 (protein-tyrosine-phosphatase) inhibitor; fertilizer |
| 2,2'-dipyridyl disulfide | 2,2'-dipyridyl disulfide: disulfide is an important moiety in this cpd aldrithiol : A member of the class of pyridines that is pyridine which is substituted by a pyridin-2-yldisulfanediyl group at position 2. It is a reagent used in molecular biology as an oxidizing agent. Also used in peptide synthesis and for detecting thiols. | organic disulfide; pyridines | oxidising agent |
| glutathione disulfide | Glutathione Disulfide: A GLUTATHIONE dimer formed by a disulfide bond between the cysteine sulfhydryl side chains during the course of being oxidized. | glutathione derivative; organic disulfide | Escherichia coli metabolite; mouse metabolite |
| sinefungin | adenosines; non-proteinogenic alpha-amino acid | antifungal agent; antimicrobial agent | |
| nsc 663284 | NSC 663284: structure in first source | quinolone | |
| s-adenosylhomocysteine | S-adenosyl-L-homocysteine : An organic sulfide that is the S-adenosyl derivative of L-homocysteine. S-Adenosylhomocysteine: 5'-S-(3-Amino-3-carboxypropyl)-5'-thioadenosine. Formed from S-adenosylmethionine after transmethylation reactions. | adenosines; amino acid zwitterion; homocysteine derivative; homocysteines; organic sulfide | cofactor; EC 2.1.1.72 [site-specific DNA-methyltransferase (adenine-specific)] inhibitor; EC 2.1.1.79 (cyclopropane-fatty-acyl-phospholipid synthase) inhibitor; epitope; fundamental metabolite |
| eriodictyol | eriodictyol : A tetrahydroxyflavanone that is flavanone substituted by hydroxy groups at positions 5, 7, 3' and 4' respectively. eriodictyol: structure | 3'-hydroxyflavanones; tetrahydroxyflavanone | |
| shikonin | shikonin: a naphthazarin; has antineoplastic and angiogenesis inhibiting activities | hydroxy-1,4-naphthoquinone | |
| 2-methyl-5-(4-methylanilino)-1,3-benzothiazole-4,7-dione | aminotoluene | ||
| ditiocarb sodium | organic molecular entity | ||
| N-(3-nitrophenyl)-1,3-benzodioxole-5-carboxamide | aromatic amide | ||
| luteolin | 3'-hydroxyflavonoid; tetrahydroxyflavone | angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; apoptosis inducer; c-Jun N-terminal kinase inhibitor; EC 2.3.1.85 (fatty acid synthase) inhibitor; immunomodulator; nephroprotective agent; plant metabolite; radical scavenger; vascular endothelial growth factor receptor antagonist | |
| kaempferol | 7-hydroxyflavonol; flavonols; tetrahydroxyflavone | antibacterial agent; geroprotector; human blood serum metabolite; human urinary metabolite; human xenobiotic metabolite; plant metabolite | |
| galangin | 5,7-dihydroxyflavonol: antimicrobial from the twigs of Populus nigra x Populus deltoides; structure in first source galangin : A 7-hydroxyflavonol with additional hydroxy groups at positions 3 and 5 respectively; a growth inhibitor of breast tumor cells. | 7-hydroxyflavonol; trihydroxyflavone | antimicrobial agent; EC 3.1.1.3 (triacylglycerol lipase) inhibitor; plant metabolite |
| kaempferide | kaempferide : A monomethoxyflavone that is the 4'-O-methyl derivative of kaempferol. kaempferide: structure in first source | 7-hydroxyflavonol; monomethoxyflavone; trihydroxyflavone | antihypertensive agent; metabolite |
| morin | morin : A pentahydroxyflavone that is 7-hydroxyflavonol bearing three additional hydroxy substituents at positions 2' 4' and 5. morin: a light yellowish pigment found in the wood of old fustic (Chlorophora tinctoria) | 7-hydroxyflavonol; pentahydroxyflavone | angiogenesis modulating agent; anti-inflammatory agent; antibacterial agent; antihypertensive agent; antineoplastic agent; antioxidant; EC 5.99.1.2 (DNA topoisomerase) inhibitor; hepatoprotective agent; metabolite; neuroprotective agent |
| scutellarein | scutellarein : Flavone substituted with hydroxy groups at C-4', -5, -6 and -7. scutellarein: aglycone of scutellarin from Scutellaria baicalensis; carthamidin is 2S isomer of scutellarein; do not confuse with isoscutellarein and/or isocarthamidin which are respective regioisomers, or with the scutelarin protein | tetrahydroxyflavone | metabolite |
| azodicarbonamide | organic molecular entity | ||
| bvt.948 | |||
| sgi-1027 | SGI-1027: inhibits DNA methyltransferase 1; structure in first source | ||
| az 505 | AZ 505: an SMYD2 inhibitor; structure in first source | ||
| bix 01294 | piperidines | ||
| unc 0638 | UNC 0638: inhibits lysine methyltransferases G9a and GLP; structure in first source | quinazolines | |
| unc 0321 | 7-(2-(2-(dimethylamino)ethoxy)ethoxy)-6-methoxy-2-(4-methyl-1,4-diazepan-1-yl)-N-(1-methylpiperidin-4-yl)quinazolin-4-amine: a G9a antagonist; structure in first source | quinazolines | |
| gsk343 | GSK343 : A member of the class of indazoles that is 1-isopropyl-1H-indazole-4-carboxamide in which the nitrogen of the carboxamide group is substituted by a (6-methyl-2-oxo-4-propyl-1,2-dihydropyridin-3-yl)methyl group and in which the indazole ring is substituted at position 6 by a 2-(4-methylpiperazin-1-yl)pyridin-4-yl group. A highly potent and selective EZH2 inhibitor (IC50 = 4 nM). GSK343: an EZH2 methyltransferase inhibitor | aminopyridine; indazoles; N-alkylpiperazine; N-arylpiperazine; pyridone; secondary carboxamide | antineoplastic agent; apoptosis inducer; EC 2.1.1.43 (enhancer of zeste homolog 2) inhibitor |
| (r)-pfi-2 | (R)-PFI-2: a potent and selective inhibitor of SETD7 methyltransferase; structure in first source | ||
| 6,7-dimethoxy-2-(pyrrolidin-1-yl)-n-(5-(pyrrolidin-1-yl)pentyl)quinazolin-4-amine | 6,7-dimethoxy-2-(pyrrolidin-1-yl)-N-(5-(pyrrolidin-1-yl)pentyl)quinazolin-4-amine: a SETD8 inhibitor; structure in first source | ||
| lly-507 | LLY-507 : A secondary carboxamide resulting from the formal condensation of the carboxy group of 5-cyano-2'-{4-[2-(3-methyl-1H-indol-1-yl)ethyl]piperazin-1-yl}[biphenyl]-3-carboxylic acid with the amino group of 3-(pyrrolidin-1-yl)propan-1-amine. It is a potent and selective inhibitor of SMYD2 and inhibits the ability of SMYD2 to methylate p53. It serves as a valuable chemical probe to aid in the dissection of SMYD2 function in cancer and other biological processes. LLY-507: inhibits methyltransferase SMYD2; structure in first source |