Target type: molecularfunction
Binding to a neurotrophin TRKA receptor. [GOC:ai]
The neurotrophin TRKA receptor, also known as the tyrosine kinase receptor A, plays a critical role in neuronal survival, differentiation, and plasticity. Its molecular function centers around binding to specific neurotrophins, primarily nerve growth factor (NGF), triggering a cascade of intracellular signaling events that ultimately influence neuronal fate.
Upon binding of NGF to the extracellular domain of TRKA, the receptor undergoes dimerization, bringing together two TRKA molecules. This dimerization activates the intrinsic tyrosine kinase activity of the receptor, leading to autophosphorylation of specific tyrosine residues within the intracellular domain.
These phosphorylated tyrosine residues serve as docking sites for various signaling molecules, including adaptor proteins like Shc and PLCγ. This recruitment initiates downstream signaling cascades that involve several key pathways:
* **Ras-MAPK pathway:** Phosphorylated Shc binds to the Grb2 adaptor protein, which in turn activates the Ras GTPase. Activated Ras triggers a cascade of protein kinases, ultimately culminating in the activation of mitogen-activated protein kinases (MAPKs). MAPKs, like ERK, contribute to gene expression regulation, cell proliferation, and survival.
* **PI3K-Akt pathway:** Phosphorylated Shc can also activate phosphatidylinositol 3-kinase (PI3K). PI3K generates phosphatidylinositol (3,4,5)-trisphosphate (PIP3), which recruits and activates Akt. Akt, a serine/threonine kinase, plays a crucial role in cell survival, growth, and metabolism.
* **PLCγ pathway:** Phosphorylated TRKA can directly activate phospholipase Cγ (PLCγ). PLCγ hydrolyzes PIP2 into diacylglycerol (DAG) and inositol trisphosphate (IP3). DAG activates protein kinase C (PKC), while IP3 triggers calcium release from intracellular stores, contributing to various cellular processes including cytoskeletal rearrangements and gene expression.
The activation of these signaling pathways ultimately leads to changes in gene expression, influencing neuronal survival, differentiation, and the development of neuronal connections. Moreover, TRKA signaling is involved in the regulation of synaptic plasticity, contributing to learning and memory processes.
In summary, the molecular function of neurotrophin TRKA receptor binding is crucial for neuronal survival, differentiation, and plasticity. The binding event initiates a complex signaling cascade that regulates gene expression and various cellular processes, ultimately shaping neuronal fate and contributing to brain function.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Growth factor receptor-bound protein 2 | A growth factor receptor-bound protein 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P62993] | Homo sapiens (human) |
| 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) |
| 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 | A 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P19174] | 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 | |||
| phosphotyrosine | O(4)-phospho-L-tyrosine : A non-proteinogenic L-alpha-amino acid that is L-tyrosine phosphorylated at the phenolic hydroxy group. Phosphotyrosine: An amino acid that occurs in endogenous proteins. Tyrosine phosphorylation and dephosphorylation plays a role in cellular signal transduction and possibly in cell growth control and carcinogenesis. | L-tyrosine derivative; non-proteinogenic L-alpha-amino acid; O(4)-phosphotyrosine | Escherichia coli metabolite; immunogen |
| 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 | |
| dactinomycin | Dactinomycin: A compound composed of a two CYCLIC PEPTIDES attached to a phenoxazine that is derived from STREPTOMYCES parvullus. It binds to DNA and inhibits RNA synthesis (transcription), with chain elongation more sensitive than initiation, termination, or release. As a result of impaired mRNA production, protein synthesis also declines after dactinomycin therapy. (From AMA Drug Evaluations Annual, 1993, p2015) | actinomycin | mutagen |
| 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 | |
| amentoflavone | biflavonoid; hydroxyflavone; ring assembly | angiogenesis inhibitor; antiviral agent; cathepsin B inhibitor; P450 inhibitor; plant metabolite | |
| 7-hydroxycoumarin-4-acetic acid | 7-hydroxycoumarin-4-acetic acid: pH-indicator dye; structure in first source | ||
| 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 |