Page last updated: 2024-10-24
mRNA transport
Definition
Target type: biologicalprocess
The directed movement of mRNA, messenger ribonucleic acid, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. [GOC:ai]
mRNA transport is a complex and essential process that ensures the delivery of genetic information from the nucleus to the cytoplasm, where protein synthesis takes place. It is a highly regulated process that involves multiple steps and factors, including:
1. **Transcription and 5' capping:** The process begins with the transcription of DNA into mRNA in the nucleus. As mRNA is being transcribed, a 5' cap is added to its 5' end. The 5' cap is a modified guanine nucleotide that protects the mRNA from degradation and helps it bind to ribosomes.
2. **Splicing:** In eukaryotic cells, most genes contain introns, non-coding sequences that must be removed from the pre-mRNA before it can be translated into protein. This removal of introns is called splicing and is mediated by the spliceosome, a complex of proteins and RNA molecules.
3. **Polyadenylation:** Once splicing is complete, the 3' end of the pre-mRNA is cleaved and a poly(A) tail is added. The poly(A) tail is a string of adenine nucleotides that protects the mRNA from degradation and helps it bind to ribosomes.
4. **Nuclear export:** After the mRNA has been processed, it is transported out of the nucleus through nuclear pores. This process is mediated by proteins called export receptors, which recognize specific signals in the mRNA, such as the 5' cap and the poly(A) tail.
5. **Cytoplasmic localization:** Once in the cytoplasm, the mRNA can be translated into protein. In some cases, mRNAs are targeted to specific locations within the cytoplasm. This localization is often mediated by specific sequences in the mRNA that bind to proteins that direct the mRNA to the correct location.
6. **Translation and degradation:** Finally, the mRNA is translated into protein by ribosomes. After translation, the mRNA is degraded by enzymes called ribonucleases.
The process of mRNA transport is essential for gene expression and is tightly regulated to ensure that the correct proteins are produced at the correct time and location. Disruptions in mRNA transport can lead to a variety of diseases.'
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Proteins (5)
| Protein | Definition | Taxonomy |
|---|---|---|
| Protein mono-ADP-ribosyltransferase PARP11 | A protein mono-ADP-ribosyltransferase PARP11 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NR21] | Homo sapiens (human) |
| Sentrin-specific protease 2 | A sentrin-specific protease 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9HC62] | Homo sapiens (human) |
| Heat shock factor protein 1 | A heat shock factor protein 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q00613] | Homo sapiens (human) |
| Heterogeneous nuclear ribonucleoprotein A1 | A heterogeneous nuclear ribonucleoprotein A1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P09651] | Homo sapiens (human) |
| Poly [ADP-ribose] polymerase tankyrase-1 | A poly [ADP-ribose] polymerase tankyrase-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O95271] | Homo sapiens (human) |
Compounds (49)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| 4'-bromoflavone | 4'-bromoflavone: structure in first source | ||
| phenanthridone | phenanthridone : A member of the class of phenanthridines that is phenanthridine with an oxo substituent at position 6. A poly(ADP-ribose) polymerase (PARP) inhibitor, it has been shown to exhibit immunosuppressive activity. phenanthridone: coal tar derivative; structure given in first source | lactam; phenanthridines | EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor; immunosuppressive agent; mutagen |
| pj-34 | PJ34 : A member of the class of phenanthridines that is 5,6-dihydrophenanthridine substituted at positions 2 and 6 by (N,N-dimethylglycyl)amino and oxo groups, respectively. It is a potent inhibitor of poly(ADP-ribose) polymerases PARP1 and PARP2 (IC50 of 110 nM and 86 nM, respectively) and exhibits anti-cancer, cardioprotective and neuroprotective properties. | phenanthridines; secondary carboxamide; tertiary amino compound | angiogenesis inhibitor; anti-inflammatory agent; antiatherosclerotic agent; antineoplastic agent; apoptosis inducer; cardioprotective agent; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor; neuroprotective agent |
| streptonigrin | pyridines; quinolone | antimicrobial agent; antineoplastic agent | |
| zm 336372 | N-(5-(3-dimethylaminobenzamido)-2-methylphenyl)-4-hydroxybenzamide: an inhibitor of c-Raf; activates Raf-1; structure in first source | benzamides | |
| flavone | flavone : The simplest member of the class of flavones that consists of 4H-chromen-4-one bearing a phenyl substituent at position 2. flavone: RN given refers to unlabeled cpd; structure given in first source | flavones | metabolite; nematicide |
| camptothecin | NSC 100880: carboxylate (opened lactone) form of camptothecin; RN refers to (S)-isomer; structure given in first source | delta-lactone; pyranoindolizinoquinoline; quinoline alkaloid; tertiary alcohol | antineoplastic agent; EC 5.99.1.2 (DNA topoisomerase) inhibitor; genotoxin; plant metabolite |
| 4-Methoxybenzamide | benzamides | ||
| 4'-methoxyflavone | 4'-methoxyflavone: from seeds of Psoralea corylifolia (Fabaceae); structure in first source | ether; flavonoids | |
| celastrol | monocarboxylic acid; pentacyclic triterpenoid | anti-inflammatory drug; antineoplastic agent; antioxidant; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; Hsp90 inhibitor; metabolite | |
| 3',4'-dihydroxyflavone | 3',4'-dihydroxyflavone: inhibitors of arachidonic acid peroxidation | ||
| 3-methoxyflavone | 3-methoxyflavone: from Aspergillus niger; structure in first source | ||
| 2'-methoxyflavone | ether; flavonoids | ||
| 6-methoxyflavone | 6-methoxyflavone: suppresses NFAT-mediated T cell activation; structure in first source | ether; flavonoids | |
| 3,4-dihydro-5-methyl-1(2h)-isoquinolinone | 3,4-dihydro-5-methyl-1(2H)-isoquinolinone: structure given in first source | isoquinolines | |
| 1-oxo-1,2,3,4-tetrahydroisoquinoline | 1-oxo-1,2,3,4-tetrahydroisoquinoline: structure given in first source | ||
| 4'-chloroflavone | 4'-chloroflavone: structure given in first source | ||
| 4'-hydroxyflavone | 4'-hydroxyflavone: structure in first source | ||
| 6-chloroflavone | 6-chloroflavone: structure in first source | ||
| e-z cinnamic acid | cinnamic acid : A monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia. trans-cinnamic acid : The E (trans) isomer of cinnamic acid | cinnamic acid | plant metabolite |
| 7-methoxyflavone | 7-methoxyflavone: an aromatase inhibitor | ether; flavonoids | |
| 6-methylflavone | 6-methylflavone: structure in first source | ||
| N-(3-methylphenyl)-4-tetrazolo[1,5-a]quinoxalinamine | quinoxaline derivative | ||
| iwr-1 exo | IWR-1-exo : A dicarboximide having an exo bridged phthalimide structure, substituted at nitrogen by a 4-(quinolin-8-ylcarbamoyl)benzoyl group. It is a weak axin stabilizer, an analogue of IWR-1-endo. | bridged compound; dicarboximide | axin stabilizer |
| N-[4-[[[4-(4-methoxyphenyl)-4-oxanyl]methylamino]-oxomethyl]phenyl]-2-furancarboxamide | aromatic amide; furans | ||
| quercetin | 7-hydroxyflavonol; pentahydroxyflavone | antibacterial agent; antineoplastic agent; antioxidant; Aurora kinase inhibitor; chelator; EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor; geroprotector; phytoestrogen; plant metabolite; protein kinase inhibitor; radical scavenger | |
| apigenin | Chamomile: Common name for several daisy-like plants (MATRICARIA; TRIPLEUROSPERMUM; ANTHEMIS; CHAMAEMELUM) native to Europe and Western Asia, now naturalized in the United States and Australia. | trihydroxyflavone | antineoplastic agent; metabolite |
| 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 | |
| 3',4',7-trihydroxyflavone | 3',4',7-trihydroxyflavone: from the Sudanese medicinal plant Albizia zygia; structure in first source | flavones | |
| rucaparib | AG14447: Poly(ADP-ribose) polymerase inhibitor; structure in first source | azepinoindole; caprolactams; organofluorine compound; secondary amino compound | antineoplastic agent; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor |
| chir-265 | aromatic ether | ||
| az-628 | AZ-628: a multikinase inhibitor; structure in first source | benzamides | |
| GDC-0879 | indanes; ketoxime; primary alcohol; pyrazoles; pyridines | antineoplastic agent; B-Raf inhibitor | |
| veliparib | benzimidazoles | EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor | |
| N-(4-methylphenyl)-4-tetrazolo[1,5-a]quinoxalinamine | quinoxaline derivative | ||
| olaparib | cyclopropanes; monofluorobenzenes; N-acylpiperazine; phthalazines | antineoplastic agent; apoptosis inducer; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor | |
| niraparib | niraparib : A 2-[4-(piperidin-3-yl)phenyl]-2H-indazole-7-carboxamide that has S-configuration. It is a potent inhibitor of PARP1 and PARP2 (IC50 of 3.8 and 2.1 nM, respectively) and approved as a first-line maintenance treatment for women with advanced ovarian cancer after responding to platinum-based chemotherapy. niraparib: structure in first source | 2-[4-(piperidin-3-yl)phenyl]-2H-indazole-7-carboxamide | antineoplastic agent; apoptosis inducer; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor; radiosensitizing agent |
| plx4032 | aromatic ketone; difluorobenzene; monochlorobenzenes; pyrrolopyridine; sulfonamide | antineoplastic agent; B-Raf inhibitor | |
| dabrafenib | 1,3-thiazoles; aminopyrimidine; organofluorine compound; sulfonamide | anticoronaviral agent; antineoplastic agent; B-Raf inhibitor | |
| iwr-1 endo | IWR-1-endo : A dicarboximide having an endo bridged phthalimide structure, substituted at nitrogen by a 4-(quinolin-8-ylcarbamoyl)benzoyl group. | benzamides; bridged compound; dicarboximide; quinolines | axin stabilizer; Wnt signalling inhibitor |
| tak-632 | TAK-632 : A member of the class of benzothiazoles that is 1,3-benzothiazole substituted by (cyclopropanecarbonyl)amino, 4-fluoro-3-{2-[3-(trifluoromethyl)phenyl]acetamido}phenoxy, and cyano groups at positions 2, 6 and 7, respectively. It is a potent pan-RAF inhibitor with IC50 of 1.4, 2.4 and 8.3 nM for CRAF, BRAF(V600E), BRAF(WT), respectively. | (trifluoromethyl)benzenes; aromatic ether; benzothiazoles; cyclopropylcarboxamide; monofluorobenzenes; nitrile; secondary carboxamide | antineoplastic agent; apoptosis inducer; B-Raf inhibitor; EC 2.7.11.26 (tau-protein kinase) inhibitor; necroptosis inhibitor |
| dinaciclib | pyrazolopyrimidine | ||
| nms-p118 | NMS-P118: a PARP-1 inhibitor; structure in first source | ||
| g007-lk | G007-LK: potent and specific small-molecule tankyrase inhibitor; structure in first source | ||
| n2-(1h-indazole-5-yl)-n6-methyl-3-nitropyridine-2,6-diamine | KRIBB11 : A member of the class of indazoles that is 1H-indazole substituted by a [6-(methylamino)-3-nitropyridin-2-yl]amino group at position 5. It is an inhibitor of heat shock factor 1 (IC50 = 1.2muM) and suppresses tumour growth in mouse xenograft models. N2-(1H-indazole-5-yl)-N6-methyl-3-nitropyridine-2,6-diamine: a heat shock factor 1 antagonist; structure in first source | ||
| CCT251545 | CCT251545 : A chloropyridine that is 3-chloropyridine substituted by a 1-oxo-2,8-diazaspiro[4.5]decan-8-yl group and a 4-(1-methyl-1H-pyrazol-4-yl)phenyl group at positions 4 and 5, respectively. It is an orally bioavailable inhibitor of Wnt signaling (IC50 = 5 nM) and a potent and selective chemical probe for cyclin-dependent kinases CDK8 and CDK19. CCT251545: a Wnt signaling inhibitor; structure in first source | azaspiro compound; chloropyridine; pyrazoles | antineoplastic agent; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor; Wnt signalling inhibitor |
| xav939 | XAV939 : A thiopyranopyrimidine in which a 7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine skeleton is substituted at C-4 by a hydroxy group and at C-2 by a para-(trifluoromethyl)phenyl group. XAV939: selectively inhibits beta-catenin-mediated transcription; structure in first source | (trifluoromethyl)benzenes; thiopyranopyrimidine | tankyrase inhibitor |
| 2-(4-methoxyphenyl)-1H-quinazolin-4-one | quinazolines | ||
| bmn 673 | talazoparib: inhibits both PARP1 and PARP2; structure in first source |