Target type: molecularfunction
Modulates the activity of a phosphatidylinositol 3-kinase (PI3K). Regulatory subunits can link a PI3K catalytic subunit to upstream signaling events and help position the catalytic subunits close to their lipid substrates. [GOC:bf, PMID:9255069]
Phosphatidylinositol 3-kinase (PI3K) regulator activity plays a critical role in cellular signaling pathways, particularly those involved in cell growth, proliferation, survival, and differentiation. PI3Ks are lipid kinases that phosphorylate the 3' hydroxyl group of phosphatidylinositol (PtdIns) lipids, generating phosphatidylinositol 3-phosphate (PIP3) and other downstream products. This phosphorylation event serves as a key signaling event, recruiting and activating downstream effector proteins, ultimately leading to changes in cellular behavior.
PI3K regulator proteins can modulate PI3K activity in various ways, including:
1. **Activation:** Some regulators directly activate PI3Ks by promoting their interaction with substrates, like PtdIns, or by inducing conformational changes that enhance their catalytic activity.
2. **Inhibition:** Other regulators act as inhibitors, blocking PI3K activity by competing with substrates, interfering with protein-protein interactions, or inducing conformational changes that decrease catalytic activity.
3. **Localization:** Certain regulators control the subcellular localization of PI3Ks, influencing their access to substrates and signaling events.
4. **Scaffolding:** Some regulators act as scaffolding proteins, bringing together multiple signaling components, including PI3Ks, to facilitate specific signaling pathways.
The specific molecular mechanism of PI3K regulation depends on the particular regulator and its interaction with PI3K. However, in general, these regulators play a crucial role in fine-tuning PI3K activity and ensuring appropriate signaling in response to various stimuli.
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| Protein | Definition | Taxonomy |
|---|---|---|
| Phosphatidylinositol 3-kinase regulatory subunit alpha | A phosphatidylinositol 3-kinase regulatory subunit alpha that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| 2-(4-morpholinyl)-8-phenyl-4h-1-benzopyran-4-one | 2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one: specific inhibitor of phosphatidylinositol 3-kinase; structure in first source | chromones; morpholines; organochlorine compound | autophagy inhibitor; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; geroprotector |
| vorinostat | vorinostat : A dicarboxylic acid diamide comprising suberic (octanedioic) acid coupled to aniline and hydroxylamine. A histone deacetylase inhibitor, it is marketed under the name Zolinza for the treatment of cutaneous T cell lymphoma (CTCL). Vorinostat: A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME. | dicarboxylic acid diamide; hydroxamic acid | antineoplastic agent; apoptosis inducer; EC 3.5.1.98 (histone deacetylase) inhibitor |
| whi p180 | |||
| wortmannin | acetate ester; cyclic ketone; delta-lactone; organic heteropentacyclic compound | anticoronaviral agent; antineoplastic agent; autophagy inhibitor; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; geroprotector; Penicillium metabolite; radiosensitizing agent | |
| 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 | |
| panobinostat | panobinostat : A hydroxamic acid obtained by formal condensation of the carboxy group of (2E)-3-[4-({[2-(2-methylindol-3-yl)ethyl]amino}methyl)phenyl]prop-2-enoic acid with the amino group of hydroxylamine. A histone deacetylase inhibitor used (as its lactate salt) in combination with bortezomib and dexamethasone for the treatment of multiple myeloma. Panobinostat: An indole and hydroxamic acid derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used as an antineoplastic agent in combination with BORTEZOMIB and DEXAMETHASONE for the treatment of MULTIPLE MYELOMA. | cinnamamides; hydroxamic acid; methylindole; secondary amino compound | angiogenesis modulating agent; antineoplastic agent; EC 3.5.1.98 (histone deacetylase) inhibitor |
| nu 7026 | 2-(morpholin-4-yl)benzo(h)chromen-4-one: a radiosensitizing agent that inhibits DNA-dependent protein kinase; structure in first source | organic heterotricyclic compound; organooxygen compound | |
| pi103 | PI103: pyridofuropyrimidine antineoplastic; a potent inhibitor of class I phosphatidylinositide 3-kinases (PI3K); structure in first soruce | aromatic amine; morpholines; organic heterotricyclic compound; phenols; tertiary amino compound | antineoplastic agent; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; mTOR inhibitor |
| PI3-Kinase alpha Inhibitor 2 | organic heterobicyclic compound; organonitrogen heterocyclic compound; organosulfur heterocyclic compound | ||
| tgx 221 | TGX 221: a platelet aggregation inhibitor | pyridopyrimidine | |
| ic 87114 | IC 87114: structure in first source | 6-aminopurines; biaryl; quinazolines | EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| tg100-115 | 3,3'-(2,4-diaminopteridine-6,7-diyl)diphenol: for treatment of ischemia reperfusion injury; structure in first source | pteridines | |
| idelalisib | idelalisib : A member of the class of quinazolines that is 5-fluoro-3-phenylquinazolin-4-one in which the hydrogen at position 2 is replaced by a (1S)-1-(3H-purin-6-ylamino)propyl group. used for for the treatment of refractory indolent non-Hodgkin's lymphoma and relapsed chronic lymphocytic leukemia. idelalisib: an antineoplastic agent and p110delta inhibitor; structure in first source | aromatic amine; organofluorine compound; purines; quinazolines; secondary amino compound | antineoplastic agent; apoptosis inducer; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| zstk474 | ZSTK-474 : A triamino-1,3,5-triazine that is 1,3,5-triazine in which two of the hydrogens have been replaced by morpholin-4-yl groups while the third hydrogen has been replaced by a 2-(difluoromethyl)benzimidazol-1-yl group. It is an inhibitor of phosphatidylinositol 3-kinase. | benzimidazoles; morpholines; organofluorine compound; triamino-1,3,5-triazine | antineoplastic agent; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| dactolisib | dactolisib : An imidazoquinoline that is 3-methyl-2-oxo-2,3-dihydro-1H-imidazo[4,5-c]quinoline substituted at position 1 by a 4-(1-cyanoisopropyl)phenyl group and at position 8 by a quinolin-3-yl group. A dual PI3K/mTOR inhibitor used in cancer treatment. dactolisib: antineoplastic agent that inhibits both phosphatidylinositol 3-kinase and mTOR | imidazoquinoline; nitrile; quinolines; ring assembly; ureas | antineoplastic agent; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; mTOR inhibitor |
| buparlisib | NVP-BKM120: a pan class I PI3 kinase inhibitor with antineoplastic activity; structure in first source | aminopyridine; aminopyrimidine; morpholines; organofluorine compound | antineoplastic agent; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| gdc 0941 | pictrelisib : A sulfonamide composed of indazole, morpholine, and methylsulfonyl-substituted piperazine rings bound to a thienopyrimidine ring. | indazoles; morpholines; piperazines; sulfonamide; thienopyrimidine | EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| gsk 2126458 | omipalisib : A member of the class of quinolines that is quinoline which is substituted by pyridazin-4-yl and 5-[(2,4-difluorobenzene-1-sulfonyl)amino]-6-methoxypyridin-3-yl groups at positions 4 and 6, respectively. It is a highly potent inhibitor of PI3K and mTOR developed by GlaxoSmithKline and was previously in human phase 1 clinical trials for the treatment of idiopathic pulmonary fibrosis and solid tumors. omipalisib: inhibitor of mTOR protein | aromatic ether; difluorobenzene; pyridazines; pyridines; quinolines; sulfonamide | anticoronaviral agent; antineoplastic agent; autophagy inducer; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; mTOR inhibitor; radiosensitizing agent |
| azd2014 | vistusertib: potent and selective dual mTORC1 and mTORC2 inhibitor; structure in first source | ||
| (5-(2,4-bis((3s)-3-methylmorpholin-4-yl)pyrido(2,3-d)pyrimidin-7-yl)-2-methoxyphenyl)methanol | (5-(2,4-bis((3S)-3-methylmorpholin-4-yl)pyrido(2,3-d)pyrimidin-7-yl)-2-methoxyphenyl)methanol: a potent, selective, and orally bioavailable ATP-competitive mammalian target of rapamycin kinase inhibitor with in vitro and in vivo antitumor activity; structure in first source | benzyl alcohols; morpholines; pyridopyrimidine; tertiary amino compound | antineoplastic agent; apoptosis inducer; mTOR inhibitor |
| 4-[6-[4-(methoxycarbonylamino)phenyl]-4-(4-morpholinyl)-1-pyrazolo[3,4-d]pyrimidinyl]-1-piperidinecarboxylic acid methyl ester | WYE-354: an mTOR inhibitor; structure in first source | carbamate ester | |
| vs-5584 | VS-5584: a highly selective PI3K/mTOR kinase inhibitor for the treatment of cancer | ||
| etp-46321 | ETP-46321: inhibits PI3K alpha and PI3K delta; structure in first source | ||
| torin 1 | torin 1 : A member of the class of pyridoquinolines that is 9-(quinolin-3-yl)benzo[h][1,6]naphthyridin-2-one bearing an additional 4-(4-propionylpiperazin-1-yl)-3-(trifluoromethyl)phenyl substituent at position 1. It is a potent inhibitor of mTOR and exhibits anti-cancer properties. | N-acylpiperazine; N-arylpiperazine; organofluorine compound; pyridoquinoline; quinolines | antineoplastic agent; mTOR inhibitor |
| ipi-145 | isoquinolines | ||
| pf-4989216 | PF-4989216: inhibits phosphatidylinositol 3-kinase; structure in first source | ||
| torin 2 | torin 2 : A member of the class of pyridoquinolines that is benzo[h][1,6]naphthyridin-2-one carrying additional 3-(trifluoromethyl)phenyl and 6-aminopyridin-3-yl substituents at positions 1 and 9 respectively. It is a potent inhibitor of mTOR and exhibits anti-cancer properties. | aminopyridine; organofluorine compound; primary amino compound; pyridoquinoline | antineoplastic agent; mTOR inhibitor |
| azd8186 | |||
| hs-173 | |||
| cudc-907 | |||
| byl719 | proline derivative | ||
| amg 511 | AMG 511: structure in first source | ||
| vx-970 | berzosertib: an ATR kinase inhibitor | sulfonamide | |
| bay 80-6946 | copanlisib : An imidazoquinazoline that is 2,3-dihydroimidazo[1,2-c]quinazoline substituted by (2-aminopyrimidine-5-carbonyl)amino, methoxy, and 3-(morpholin-4-yl)propoxy groups at positions 5, 7 and 8, respectively. It is a intravenous pan-class I PI3K inhibitor used for the treatment of relapsed follicular lymphoma in patients who have received at least 2 prior systemic therapies. copanlisib: an antineoplastic agent with PI3K inhibitory activity; structure in first source |