primary miRNA binding
Definition
Target type: molecularfunction
Binding to a primary microRNA (pri-miRNA) transcript, an RNA molecule that is processed into a short hairpin-shaped structure called a pre-miRNA and finally into a functional miRNA. Both double-stranded and single-stranded regions of a pri-miRNA are required for binding. [GOC:sl, PMID:15531877, PMID:15574589]
Primary miRNA binding, a critical step in microRNA (miRNA) biogenesis, involves the recognition and interaction of specific proteins with the nascent pri-miRNA transcript. This process initiates the formation of the microRNA processing complex, which ultimately leads to the production of mature miRNAs. The molecular function of primary miRNA binding can be broken down into the following key aspects:
1. **Pri-miRNA Recognition:** Specialized proteins, such as Drosha in animals and its plant counterpart, Dicer-like 1 (DCL1), bind to specific structural features within the pri-miRNA molecule. These features include the stem-loop structure formed by base pairing within the pri-miRNA transcript, as well as flanking sequences that provide additional recognition points.
2. **Complex Assembly:** The binding of these proteins to the pri-miRNA triggers the assembly of the microprocessor complex in animals or the DCL1 complex in plants. This complex is crucial for the efficient processing of pri-miRNAs.
3. **Cleavage and Release:** The microprocessor or DCL1 complex processes the pri-miRNA through a precise cleavage event, releasing a hairpin-shaped precursor miRNA (pre-miRNA). This cleavage is typically mediated by the RNase III endonuclease activity of Drosha or DCL1, respectively.
4. **Structural Transformation:** The interaction of the microprocessor or DCL1 complex with the pri-miRNA not only triggers cleavage but also induces a conformational change in the pri-miRNA. This conformational change facilitates the release of the pre-miRNA from the complex.
5. **Specificity and Regulation:** Primary miRNA binding is highly specific, ensuring that only the appropriate pri-miRNAs are selected for processing. This specificity is achieved through the recognition of specific sequence elements within the pri-miRNA and the interaction with specific proteins within the processing complex. The process of primary miRNA binding is tightly regulated, allowing cells to control the levels and types of miRNAs produced, thereby influencing gene expression in response to diverse cellular cues and developmental signals.'
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Proteins (2)
| Protein | Definition | Taxonomy |
|---|---|---|
| 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) |
| Signal transducer and activator of transcription 3 | A signal transducer and activator of transcription 3 that is encoded in the genome of human. [PRO:WCB, UniProtKB:P40763] | Homo sapiens (human) |
Compounds (38)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| niclosamide | niclosamide : A secondary carboxamide resulting from the formal condensation of the carboxy group of 5-chlorosalicylic acid with the amino group of 2-chloro-4-nitroaniline. It is an oral anthelmintic drug approved for use against tapeworm infections. Niclosamide: An antihelmintic that is active against most tapeworms. (From Martindale, The Extra Pharmacopoeia, 30th ed, p48) | benzamides; C-nitro compound; monochlorobenzenes; salicylanilides; secondary carboxamide | anthelminthic drug; anticoronaviral agent; antiparasitic agent; apoptosis inducer; molluscicide; piscicide; STAT3 inhibitor |
| oleanolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | plant metabolite | |
| nitazoxanide | nitazoxanide: a 5-nitrothiazolyl derivative used for a broad range of intestinal parasitic infections including CRYPTOSPORIDIUM and GIARDIA; it is a redox-active nitrothiazolyl-salicylamide prodrug | benzamides; carboxylic ester | |
| 3-deazaneplanocin | 3-deazaneplanocin: S-adenosylhomocysteine hydrolase antagonist | ||
| loganin | beta-D-glucoside; cyclopentapyran; enoate ester; iridoid monoterpenoid; methyl ester; monosaccharide derivative; secondary alcohol | anti-inflammatory agent; EC 3.1.1.7 (acetylcholinesterase) inhibitor; EC 3.2.1.20 (alpha-glucosidase) inhibitor; EC 3.4.23.46 (memapsin 2) inhibitor; neuroprotective agent; plant metabolite | |
| tanshinone | tanshinone: from root of Salvia miltiorrhiza Bunge; RN given refers to tanshinone I; cardioprotective agent and neuroprotective agent | abietane diterpenoid | anticoronaviral agent |
| tetrahydrocurcumin | tetrahydrocurcumin : A beta-diketone that is curcumin in which both of the double bonds have been reduced to single bonds. | beta-diketone; diarylheptanoid; polyphenol | metabolite |
| przewaquinone d | przewaquinone D: isolated from root of Salvia przewalskii; structure given in first source; RN given refers to the trans- isomer, przewaquinone D | ||
| cryptotanshinone | cryptotanshinone: from Salvia miltiorrhiza | abietane diterpenoid | anticoronaviral agent |
| ar-turmerone | (+)-(S)-ar-turmerone : A sesquiterpenoid that is 2-methylhept-2-en-4-one substituted by a 4-methylphenyl group at position 6. It has been isolated from Peltophorum dasyrachis. ar-turmerone: potent antivenom against snake bites; isolated form Curcuma longa; structure given in first source | enone; sesquiterpenoid | EC 3.1.1.7 (acetylcholinesterase) inhibitor; plant metabolite |
| sweroside | glycoside | ||
| tanshinone ii a | tashinone IIA: a cardiovascular agent with antineoplastic activity; isolated from Salvia miltiorrhiza; structure in first source | abietane diterpenoid | |
| 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 |
| telocinobufagin | telocinobufagin: structure | steroid lactone | |
| tizoxanide | tizoxanide: major metabolite of nitazoxanide; structure in first source | salicylamides | |
| bardoxolone methyl | methyl 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-oate: structure in first source | cyclohexenones | |
| 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 |
| bisabolol | Kamillosan: drug combination containing chamomile and bisabolol; used to treat dermatitis | sesquiterpenoid | |
| ganoderic acid a | triterpenoid | ||
| piplartine | piplartine: Antineoplastic Agent, Phytogenic; alkaloid from Piper; structure in first source | cinnamamides; dicarboximide | |
| stattic | 1-benzothiophenes; C-nitro compound; sulfone | antineoplastic agent; radiosensitizing agent; STAT3 inhibitor | |
| stx-0119 | STX-0119: antineoplastic; structure in first source | ||
| genistein | 7-hydroxyisoflavones | antineoplastic agent; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; geroprotector; human urinary metabolite; phytoestrogen; plant metabolite; tyrosine kinase inhibitor | |
| andrographolide | carbobicyclic compound; gamma-lactone; labdane diterpenoid; primary alcohol; secondary alcohol | anti-HIV agent; anti-inflammatory drug; antineoplastic agent; metabolite | |
| nifuroxazide | nifuroxazide: structure | benzoic acids | |
| hylin | |||
| 2-acetylfuranonaphthoquinone | 2-acetylfuranonaphthoquinone: has antineoplastic activity; structure in first source | ||
| 5,15-diphenylporphine | 5,15-diphenylporphine: structure in first source | ||
| wp1066 | |||
| azd 1480 | |||
| bp-1-102 | BP-1-102: a STAT3 inhibitor; structure in first source | ||
| 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 |
| 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 | |
| phaeosphaeride a | phaeosphaeride A: inhibits STAT3-dependent signaling; structure in first source | ||
| hydrazinocurcumin | hydrazinocurcumin : A pyrazole obtained by cyclocodensation of the two carbonyl groups of curcumin with hydrazine. hydrazinocurcumin: structure in first source | aromatic ether; olefinic compound; polyphenol; pyrazoles | angiogenesis modulating agent; antineoplastic agent; EC 2.3.1.48 (histone acetyltransferase) inhibitor; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor |