Target type: molecularfunction
A general transcription initiation factor activity that contributes to transcription start site selection and transcription initiation of genes transcribed by RNA polymerase II. The general transcription factors for RNA polymerase II include TFIIB, TFIID, TFIIE, TFIIF, TFIIH and TATA-binding protein (TBP). In most species, RNA polymerase II transcribes all messenger RNAs (mRNAs), most untranslated regulatory RNAs, the majority of the snoRNAs, four of the five snRNAs (U1, U2, U4, and U5), and other small noncoding RNAs. For some small RNAs there is variability between species as to whether it is transcribed by RNA polymerase II or RNA polymerase III. However there are also rare exceptions, such as Trypanosoma brucei, where RNA polymerase I transcribes certain mRNAs in addition to its normal role in rRNA transcription. [GOC:txnOH-2018, PMID:10384286, PMID:10747032, PMID:23442138, PMID:25693126]
RNA polymerase II general transcription initiation factor activity is a crucial step in gene expression, involving the assembly of the pre-initiation complex (PIC) at the promoter region of a gene. This complex comprises RNA polymerase II (RNAPII), a core enzyme responsible for transcribing DNA into RNA, along with several general transcription factors (GTFs): TFIIA, TFIIB, TFIID, TFIIE, and TFIIF. The GTFs act as molecular chaperones, facilitating the recruitment and positioning of RNAPII onto the promoter.
The process begins with the binding of TFIID, which contains the TATA-binding protein (TBP) that specifically recognizes and binds to the TATA box, a DNA sequence motif commonly found upstream of eukaryotic genes. TFIID's binding triggers the recruitment of TFIIA, which stabilizes TFIID's interaction with the promoter. Following TFIIA, TFIIB binds to TFIID, providing a platform for RNAPII to associate with the promoter.
TFIIF, which binds to RNAPII, guides the enzyme to the promoter, ensuring that RNAPII is properly positioned for initiation. Finally, TFIIE joins the complex, playing a role in the recruitment of TFIIH, a crucial factor for unwinding the DNA helix and phosphorylating the C-terminal domain (CTD) of RNAPII.
The phosphorylation of the CTD by TFIIH signals the transition from initiation to elongation, enabling RNAPII to move along the DNA template and transcribe the gene. This elaborate process ensures precise regulation of gene expression, allowing cells to control the production of specific proteins in response to various internal and external signals.'
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Protein | Definition | Taxonomy |
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Transcription initiation factor TFIID subunit 1-like | A transcription initiation factor TFIID 210 kDa subunit that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8IZX4] | Homo sapiens (human) |
Cyclin-H | A cyclin-H that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
Transcription initiation factor TFIID subunit 1 | A transcription initiation factor TFIID subunit 1 that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
Compound | Definition | Classes | Roles |
---|---|---|---|
gw8510 | GW8510: 3' substituted indolone as a scaffold for the development of neuroprotective drug; structure in first source | ||
nu6102 | NU6102: structure in first source | ||
staurosporine | indolocarbazole alkaloid; organic heterooctacyclic compound | apoptosis inducer; bacterial metabolite; EC 2.7.11.13 (protein kinase C) inhibitor; geroprotector | |
cyc 202 | seliciclib : 2,6-Diaminopurine carrying benzylamino, (2R)-1-hydroxybutan-2-yl and isopropyl substituents at C-6, C-2-N and N-9 respectively. It is an experimental drug candidate in the family of pharmacological cyclin-dependent kinase (CDK) inhibitors. | 2,6-diaminopurines | antiviral drug; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
2H-pyrazolo[4,3-b]quinoxalin-3-amine | quinoxaline derivative | ||
6-bromoindirubin-3'-oxime | 6-bromoindirubin-3'-oxime : A member of the class of biindoles that is indirubin substituted at position 6 by a bromo group and in which the keto group at position 3' has undergone condensation with hydroxylamine to form the corresponding oxime. 6-bromoindirubin-3'-oxime: structure in first source | ||
purvalanol a | 6-((3-chloro)anilino)-2-(isopropyl-2-hydroxyethylamino)-9-isopropylpurine: purvalanol A is the (1R)-isomer; | purvalanol | |
2-methyl-5-(4-methylanilino)-1,3-benzothiazole-4,7-dione | aminotoluene | ||
cgp 60474 | substituted aniline | ||
cgp 74514a | |||
1,4-dimethoxy-10H-acridine-9-thione | acridines | ||
bms 387032 | N-(5-(((5-(1,1-dimethylethyl)-2-oxazolyl)methyl)thio)-2-thiazolyl)-4-piperidinecarboxamide: a CDK2 inhibitor with antineoplastic activity; structure in first source N-(5-{[(5-tert-butyl-1,3-oxazol-2-yl)methyl]sulfanyl}-1,3-thiazol-2-yl)piperidine-4-carboxamide : A secondary carboxamide resulting from the formal condensation of the carboxy group of piperidine-4-carboxylic acid with the amino group of 5-{[(5-tert-butyl-1,3-oxazol-2-yl)methyl]sulfanyl}-1,3-thiazol-2-amine. It is an ATP-competitive inhibitor of CDK2, CDK7 and CDK9 kinases and exhibits anti-cancer properties. | 1,3-oxazoles; 1,3-thiazoles; organic sulfide; piperidinecarboxamide; secondary carboxamide | angiogenesis inhibitor; antineoplastic agent; apoptosis inducer; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
harmine | harmine : A harmala alkaloid in which the harman skeleton is methoxy-substituted at C-7. Harmine: Alkaloid isolated from seeds of PEGANUM HARMALA; ZYGOPHYLLACEAE. It is identical to banisterine, or telepathine, from Banisteria caapi and is one of the active ingredients of hallucinogenic drinks made in the western Amazon region from related plants. It has no therapeutic use, but (as banisterine) was hailed as a cure for postencephalitic PARKINSON DISEASE in the 1920's. | harmala alkaloid | anti-HIV agent; EC 1.4.3.4 (monoamine oxidase) inhibitor; metabolite |
wogonin | wogonin : A dihydroxy- and monomethoxy-flavone in which the hydroxy groups are positioned at C-5 and C-7 and the methoxy group is at C-8. wogonin: structure in first source | dihydroxyflavone; monomethoxyflavone | angiogenesis inhibitor; antineoplastic agent; cyclooxygenase 2 inhibitor; plant metabolite |
alvocidib | alvocidib : A synthetic dihydroxyflavone that is 5,7-dihydroxyflavone which is substituted by a 3-hydroxy-1-methylpiperidin-4-yl group at position 8 and by a chlorine at the 2' position (the (-)-3S,4R stereoisomer). A cyclin-dependent kinase 9 (CDK9) inhibitor, it has been studied for the treatment of acute myeloid leukaemia, arthritis and atherosclerotic plaque formation. alvocidib: structure given in first source | dihydroxyflavone; hydroxypiperidine; monochlorobenzenes; tertiary amino compound | antineoplastic agent; antirheumatic drug; apoptosis inducer; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
su 9516 | |||
arcyriaflavin a | arcyriaflavin A: from marine ascidian, Eudistoma sp.; structure given in first source | indolocarbazole | |
palbociclib | aminopyridine; aromatic ketone; cyclopentanes; piperidines; pyridopyrimidine; secondary amino compound; tertiary amino compound | antineoplastic agent; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor | |
cyc 116 | 4-methyl-5-(2-(4-morpholinophenylamino)pyrimidin-4-yl)thiazol-2-amine: an aurora kinase inhibitor; structure in first source | ||
cvt 313 | CVT 313: a potent inhibitor of CDK2 that prevents neointimal proliferation; structure given in first source | ||
leucettamine b | leucettamine B: a protein kinase inhibitor isolated from the marine sponge Leucetta microraphis; structure in first source | ||
nu 6140 | 4-(6-cyclohexylmethoxy-9H-purin-2-ylamino)-N,N-diethylbenzamide: a cyclin-dependent kinase inhibitor; structure in first source | ||
rgb 286638 | |||
at 7519 | 4-(2,6-dichlorobenzamido)-N-(piperidin-4-yl)-pyrazole-3-carboxamide : A member of the class of pryrazoles that is 4-amino-1H-pyrazole-3-carboxylic acid in which the primary amino group has been acylated by a 2,6-dichlorobenzoyl group and in which the carboxylic acid has been converted into a carboxamide by formal condensation with the primary amino group of 4-aminopiperidine. | dichlorobenzene; piperidines; pyrazoles; secondary carboxamide | antineoplastic agent; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
bi 2536 | |||
pf 573228 | 6-(4-(3-(methylsulfonyl)benzylamino)-5-(trifluoromethyl)pyrimidin-2-ylamino)-3,4-dihydroquinolin-2(1H)-one: structure in first source | quinolines | |
pha 848125 | N,1,4,4-tetramethyl-8-((4-(4-methylpiperazin-1-yl)phenyl)amino)-4,5-dihydro-1H-pyrazolo(4,3-h)quinazoline-3-carboxamide: a cyclin dependent kinase inhibitor | ||
14-methyl-20-oxa-5,7,14,26-tetraazatetracyclo(19.3.1.1(2,6).1(8,12))heptacosa-1(25),2(26),3,5,8(27),9,11,16,21,23-decaene | 14-methyl-20-oxa-5,7,14,26-tetraazatetracyclo(19.3.1.1(2,6).1(8,12))heptacosa-1(25),2(26),3,5,8(27),9,11,16,21,23-decaene: has antineoplastic activity; also inhibits Fms-like tyrosine kinase-3; structure in first source | ||
p276-00 | P276-00: antineoplastic, cyclin-dependent kinase inhibitor; structure in first source | ||
cink4 | CINK4: cyclin-dependent kinase 4 inhibitor; may have tumor suppression activity; structure in first source | indoles | |
ldc067 | |||
bs 194 | |||
(R)-DRF053 | (R)-DRF053 : A member of the class of 2,6-diaminopurines that is 2,6-diamiopurine which is substituted by an isopropyl group at position 9 and in which the amino groups at positions 2 and 6 are substituted by a 1-hydroxybutan-2-yl and 3-(pyridin-2-yl)phenyl groups, respectively (the R enantiomer). A cyclin dependent kinase inhibitor, widely used as its hydrochloride hydrate. | 2,6-diaminopurines; phenylpyridine; primary alcohol; secondary amino compound | EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
pf 3758309 | PF 3758309: a PAK4 p21-activated kinase inhibitor; structure in first source | organic heterobicyclic compound; organonitrogen heterocyclic compound; organosulfur heterocyclic compound | |
ribociclib | ribociclib: inhibits both CDK4 and CDK6 | ||
bay 1000394 | roniciclib: an antineoplastic agent that inhibits cyclin-dependent kinases; structure in first source | ||
pha 793887 | piperidinecarboxamide | ||
abemaciclib | |||
(3R)-4-[2-(1H-indol-4-yl)-6-(1-methylsulfonylcyclopropyl)-4-pyrimidinyl]-3-methylmorpholine | indoles | ||
dinaciclib | pyrazolopyrimidine | ||
gilteritinib | gilteritinib : A member of the class of pyrazines that is pyrazine-2-carboxamide which is substituted by {3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}nitrilo, (oxan-4-yl)nitrilo and ethyl groups at positions 3,5 and 6, respectively. It is a potent inhibitor of FLT3 and AXL tyrosine kinase receptors (IC50 = 0.29 nM and 0.73 nM, respectively). Approved by the FDA for the treatment of acute myeloid leukemia in patients who have a FLT3 gene mutation. gilteritinib: an FLT3/AXL protein tyrosine kinase inhibitor | aromatic amine; monomethoxybenzene; N-methylpiperazine; oxanes; piperidines; primary carboxamide; pyrazines; secondary amino compound | antineoplastic agent; apoptosis inducer; EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor |
longdaysin | |||
bs-181 | BS-181: a CDK7 inhibitor with antineoplastic activity | pyrazolopyrimidine | |
i-bet726 | |||
on123300 | ON123300: a protein kinase inhibitor; structure in first source | ||
ly2857785 | |||
THZ531 | THZ531 : A member of the class of indoles that is 5-chloro-4-(1H-indol-3-yl)-N-[(3R)-piperidin-3-yl]pyrimidin-2-amine in which the piperidine NH group is substituted by a 4-{[(2E)-4-(dimethylamino)but-2-enoyl]amino}benzoyl group. It is a first-in-class CDK12 and CDK13 covalent kinase inhibitor with IC50 of 158 nM and 69 nM, respectively. THZ531: inhibits both CDK12 and CDK13; structure in first source | aminopyrimidine; enamide; indoles; N-acylpiperidine; organochlorine compound; secondary amino compound; secondary carboxamide | antineoplastic agent; apoptosis inducer; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
can 508 | CAN 508: has antiangiogenic activity; structure in first source CAN-508 : A member of the class of pyrazoles that is 1H-pyrazole substituted by amino, (4-hydroxyphenyl)diazenyl, and amino groups at positions 3, 4 and 5, respectively. It is a CDK9 inhibitor (IC50 = 0.35 muM) with 38-fold selectivity for CDK9/cyclin T over other CDK/cyclin complexes. | aromatic amine; monoazo compound; phenols; pyrazoles | angiogenesis inhibitor; antineoplastic agent; apoptosis inducer; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor |
((5z)5-(1,3-benzodioxol-5-yl)methylene-2-phenylamino-3,5-dihydro-4h-imidazol-4-one) | leucettine L41 : A member of the class of benzodioxoles that is 1,3-benzodioxole substituted by a (2-anilino-5-oxo-1,5-dihydro-4H-imidazol-4-ylidene)methyl group at position 5. It is an inhibitor of DYRK1A, DYRK2, CLK1, and CLK3 (IC50s = 0.04, 0.035, 0.015, and 4.5 muM, respectively). | benzodioxoles; imidazolone; substituted aniline | autophagy inducer; EC 2.7.11.22 (cyclin-dependent kinase) inhibitor; EC 2.7.12.1 (dual-specificity kinase) inhibitor; neuroprotective agent; nootropic agent |
ro 3306 | RO 3306: structure in first source |