Target type: molecularfunction
Catalysis of the reaction: S-adenosyl-L-methionine + a histone H3 = S-adenosyl-L-homocysteine + a methylated histone H3. Histone methylation generally occurs on either an arginine or a lysine residue. [PMID:28450737]
Histone H3 methyltransferase activity is a crucial enzymatic function that plays a vital role in regulating gene expression and other nuclear processes. This activity involves the transfer of a methyl group from a donor molecule, typically S-adenosyl methionine (SAM), to specific lysine residues within the histone H3 protein. Histone H3 is a core component of nucleosomes, the fundamental units of chromatin packaging. Methylation of histone H3 at different lysine residues can lead to diverse downstream effects, including:
* **Chromatin Remodeling:** Methylation can influence the accessibility of DNA to transcription factors and other regulatory proteins. For example, methylation at lysine 4 (H3K4me) is associated with active gene transcription, while methylation at lysine 27 (H3K27me) is linked to gene silencing.
* **Recruitment of Specific Proteins:** Methylated histone tails serve as binding sites for specific proteins containing "reader" domains, such as chromodomains or PHD fingers. These reader proteins can then mediate further downstream events, such as recruitment of histone modifiers or transcription factors.
* **Signal Integration:** Methylation of histone H3 can be integrated with other histone modifications, such as acetylation or phosphorylation, to generate complex regulatory landscapes that fine-tune gene expression.
Different histone H3 methyltransferases (HMTs) exhibit specific substrate preferences and target different lysine residues. These enzymes are often highly regulated and their activity is tightly controlled in response to various cellular signals and developmental cues. Dysregulation of histone H3 methyltransferase activity is implicated in various disease states, including cancer and developmental disorders.
In summary, histone H3 methyltransferase activity is a fundamental epigenetic mechanism that contributes to the regulation of gene expression, chromatin dynamics, and cellular function. Through the precise methylation of specific lysine residues, HMTs influence the accessibility of DNA, recruit regulatory proteins, and integrate with other epigenetic modifications to generate complex regulatory landscapes.'
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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) |
| Histone-lysine N-methyltransferase SUV39H2 | A histone-lysine N-methyltransferase SUV39H2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9H5I1] | Homo sapiens (human) |
| Protein arginine N-methyltransferase 6 | A protein arginine N-methyltransferase 6 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96LA8] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase, H3 lysine-79 specific | A histone-lysine N-methyltransferase, H3 lysine-79 specific that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8TEK3] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase EZH2 | A histone-lysine N-methyltransferase EZH2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q15910] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SETDB1 | A histone-lysine N-methyltransferase SETDB1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q15047] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase NSD2 | A histone-lysine N-methyltransferase NSD2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O96028] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SUV39H1 | A histone-lysine N-methyltransferase SUV39H1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O43463] | Homo sapiens (human) |
| Protein arginine N-methyltransferase 5 | A protein arginine N-methyltransferase 5 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O14744] | Homo sapiens (human) |
| N-lysine methyltransferase SMYD2 | An N-lysine methyltransferase SMYD2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NRG4] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SUV39H2 | A histone-lysine N-methyltransferase SUV39H2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9H5I1] | Homo sapiens (human) |
| Protein arginine N-methyltransferase 6 | A protein arginine N-methyltransferase 6 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96LA8] | 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) |
| Histone-lysine N-methyltransferase, H3 lysine-79 specific | A histone-lysine N-methyltransferase, H3 lysine-79 specific that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8TEK3] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase EZH2 | A histone-lysine N-methyltransferase EZH2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q15910] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase NSD2 | A histone-lysine N-methyltransferase NSD2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O96028] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SUV39H1 | A histone-lysine N-methyltransferase SUV39H1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O43463] | Homo sapiens (human) |
| Protein arginine N-methyltransferase 5 | A protein arginine N-methyltransferase 5 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O14744] | 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 |
| pentamidine | pentamidine : A diether consisting of pentane-1,5-diol in which both hydroxyl hydrogens have been replaced by 4-amidinophenyl groups. A trypanocidal drug that is used for treatment of cutaneous leishmaniasis and Chagas disease. Pentamidine: Antiprotozoal agent effective in trypanosomiasis, leishmaniasis, and some fungal infections; used in treatment of PNEUMOCYSTIS pneumonia in HIV-infected patients. It may cause diabetes mellitus, central nervous system damage, and other toxic effects. | aromatic ether; carboxamidine; diether | anti-inflammatory agent; antifungal agent; calmodulin antagonist; chemokine receptor 5 antagonist; EC 2.3.1.48 (histone acetyltransferase) inhibitor; NMDA receptor antagonist; S100 calcium-binding protein B inhibitor; trypanocidal drug; xenobiotic |
| pimethixene | pimethixene: structure | thioxanthenes | |
| sulfathiazole | sulfathiazole : A 1,3-thiazole compound having a 4-aminobenzenesulfonamido group at the 2-position. Sulfathiazole: A sulfathiazole compound that is used as a short-acting anti-infective agent. It is no longer commonly used systemically due to its toxicity, but may still be applied topically in combination with other drugs for the treatment of vaginal and skin infections, and is still used in veterinary medicine. | 1,3-thiazoles; substituted aniline; sulfonamide; sulfonamide antibiotic | antiinfective agent; drug allergen; EC 2.5.1.15 (dihydropteroate synthase) inhibitor; environmental contaminant; xenobiotic |
| gliotoxin | gliotoxin : A pyrazinoindole with a disulfide bridge spanning a dioxo-substituted pyrazine ring; mycotoxin produced by several species of fungi. Gliotoxin: A fungal toxin produced by various species of Trichoderma, Gladiocladium fimbriatum, Aspergillus fumigatus, and Penicillium. It is used as an immunosuppressive agent. | dipeptide; organic disulfide; organic heterotetracyclic compound; pyrazinoindole | antifungal agent; EC 2.5.1.58 (protein farnesyltransferase) inhibitor; immunosuppressive agent; mycotoxin; proteasome inhibitor |
| 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 | ||
| toyocamycin | toyocamycin : An N-glycosylpyrrolopyrimidine that is tubercidin in which the hydrogen at position 5 of the pyrrolopyrimidine moiety has been replaced by a cyano group. Toyocamycin: 4-Amino-5-cyano-7-(D-ribofuranosyl)-7H- pyrrolo(2,3-d)pyrimidine. Antibiotic antimetabolite isolated from Streptomyces toyocaensis cultures. It is an analog of adenosine, blocks RNA synthesis and ribosome function, and is used mainly as a tool in biochemistry. | antibiotic antifungal agent; N-glycosylpyrrolopyrimidine; nitrile; ribonucleoside | antimetabolite; antineoplastic agent; apoptosis inducer; bacterial metabolite |
| nsc 65346 | sangivamycin : A nucleoside analogue that is adenosine in which the nitrogen at position 7 is replaced by a carbamoyl-substituted carbon. It is a potent inhibitor of protein kinase C. sangivamycin: RN given refers to parent cpd | nucleoside analogue | protein kinase inhibitor |
| 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 |
| s-adenosylmethionine | acylcarnitine: structure in first source S-adenosyl-L-methioninate : A sulfonium betaine that is a conjugate base of S-adenosyl-L-methionine obtained by the deprotonation of the carboxy group. | sulfonium betaine | human metabolite |
| adenosine | quinquefolan B: isolated from roots of Panax quinquefolium L.; RN not in Chemline 10/87; RN from Toxlit | adenosines; purines D-ribonucleoside | analgesic; anti-arrhythmia drug; fundamental metabolite; human metabolite; vasodilator agent |
| hexamidine | hexamidine : A polyether that is the bis(4-guanidinophenyl) ether of hexane-1,6-diol. | aromatic ether; guanidines; polyether | antimicrobial agent; antiseptic drug |
| sinefungin | adenosines; non-proteinogenic alpha-amino acid | antifungal agent; antimicrobial agent | |
| 3-deazaneplanocin | 3-deazaneplanocin: S-adenosylhomocysteine hydrolase antagonist | ||
| c.i. direct red 23 | C.I. Direct Red 23: azo dye; structure in first source | ||
| 5-iodotubercidin | 7-iodotubercidin: inhibits Toxoplasma gondii adenosine kinase | organoiodine compound | |
| tanshinone | tanshinone: from root of Salvia miltiorrhiza Bunge; RN given refers to tanshinone I; cardioprotective agent and neuroprotective agent | abietane diterpenoid | anticoronaviral agent |
| przewaquinone d | przewaquinone D: isolated from root of Salvia przewalskii; structure given in first source; RN given refers to the trans- isomer, przewaquinone D | ||
| furamidine | furamidine: RN given refers to parent cpd; WR 199385 refers to di-HCl; pafuramidine is a prodrug of this | ||
| tanshinone ii a | tashinone IIA: a cardiovascular agent with antineoplastic activity; isolated from Salvia miltiorrhiza; structure in first source | abietane diterpenoid | |
| s-adenosyl-3-thiopropylamine | S-adenosyl-3-thiopropylamine : A thioadenosine that is adenosine in which the hydroxy group at C-5' is replaced by a 3-aminopropyl group. S-adenosyl-3-thiopropylamine: decarboxylated S-adenosylhomocysteine; RN given refers to parent cpd | organic sulfide; primary amino compound; thioadenosine | |
| 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 |
| 5'-methylthioadenosine | 5'-methylthioadenosine: structure 5'-S-methyl-5'-thioadenosine : Adenosine with the hydroxy group at C-5' substituted with a methylthio (methylsulfanyl) group. | thioadenosine | algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae 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 | |
| verticillins | verticillins: 3 antibiotics isolated from imperfect fungus Verticillium: verticillin A, verticillin B (mono-3-hydroxymethyl analog of verticillin A), & verticillin C (differs from verticillin B in that 1 of dioxopiperazine rings has a trisulfide rather than a disulfide bridge; active against gram-positive bacteria & mycobacteria but not against gram-negative bacteria & fungi; RN given refers to cpd with unknown MF; structure (verticillins A & B)) | ||
| 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 |
| stilbamidine | stilbamidine: RN given refers to parent cpd | ||
| chetomin | |||
| az 505 | AZ 505: an SMYD2 inhibitor; structure in first source | ||
| 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 | |
| epz004777 | N-glycosyl compound | ||
| epz-5676 | 5'-deoxyribonucleoside | ||
| epz005687 | EPZ005687: inhibits EZH2 protein; structure in first source | indazoles | |
| epz-6438 | tazemetostat: a histone methyltransferase EZH2 inhibitor with antineoplastic activity | ||
| gsk-2816126 | GSK-2816126: inhibits EZH2 methyltransferase; structure in first source | piperazines; pyridines | |
| 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 | ||
| 1-[(1R)-1-(1-ethylsulfonyl-4-piperidinyl)ethyl]-N-[(4-methoxy-6-methyl-2-oxo-1H-pyridin-3-yl)methyl]-2-methyl-3-indolecarboxamide | (R)-1-(1-(1-(ethylsulfonyl)piperidin-4-yl)ethyl)-N-((4-methoxy-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methyl-1H-indole-3-carboxamide: EZH2 inhibitor | indolecarboxamide | |
| 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 | ||
| gsk3235025 | GSK3235025: an inhibitor of protein arginine methyltransferase-5 (PRMT5); 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 |