Page last updated: 2024-10-24
double-strand break repair via nonhomologous end joining
Definition
Target type: biologicalprocess
The repair of a double-strand break in DNA in which the two broken ends are rejoined with little or no sequence complementarity. Information at the DNA ends may be lost due to the modification of broken DNA ends. This term covers instances of separate pathways, called classical (or canonical) and alternative nonhomologous end joining (C-NHEJ and A-NHEJ). These in turn may further branch into sub-pathways, but evidence is still unclear. [GOC:rph, PMID:10827453, PMID:24837021]
Nonhomologous end joining (NHEJ) is a major pathway for repairing double-strand breaks (DSBs) in DNA. It is an error-prone process that is active throughout the cell cycle and is particularly important in G1 phase, when the sister chromatid is not available for homologous recombination. Here is a detailed description of the biological process:
1. **Break Recognition and Processing:**
- Upon DSB formation, the ends of the broken DNA strands are processed by nucleases, primarily the MRN complex (Mre11-Rad50-Nbs1), which removes damaged nucleotides and generates short 3'-overhangs.
- These 3'-overhangs are then bound by the Ku70/Ku80 heterodimer, which forms a ring around the DNA ends and protects them from further degradation.
- The Ku complex also acts as a scaffold for the recruitment of other NHEJ proteins.
2. **End Joining:**
- The DNA ligase IV-XRCC4 complex is recruited to the Ku-bound ends.
- This complex bridges the broken DNA strands, bringing them into close proximity.
- If the DNA ends have complementary sequences, they can anneal directly.
- However, in many cases, there are mismatches or overhangs that need to be processed.
- The Artemis nuclease, acting with the DNA-PKcs kinase, can remove these mismatches and generate blunt ends.
- The DNA ligase IV-XRCC4 complex then seals the two ends together, forming a repaired DNA molecule.
3. **Accuracy and Error Prone Nature:**
- NHEJ is an error-prone process because it can introduce deletions, insertions, or translocations at the repair site.
- This is due to the lack of homology between the DNA ends, which makes precise alignment difficult.
- Moreover, the enzymatic activities of NHEJ factors can lead to the loss of nucleotides or the addition of incorrect nucleotides during end processing.
- Despite its error-prone nature, NHEJ is essential for maintaining genomic integrity and preventing cell death.
- It is particularly important for repairing DSBs in regions of the genome that are not actively transcribed or that lack homologous sequences, such as telomeres and centromeres.'
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Proteins (17)
| Protein | Definition | Taxonomy |
|---|---|---|
| DNA polymerase lambda | A DNA polymerase lambda that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9UGP5] | Homo sapiens (human) |
| DNA-directed DNA/RNA polymerase mu | A DNA-directed DNA/RNA polymerase mu that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NP87] | Homo sapiens (human) |
| Serine-protein kinase ATM | A serine-protein kinase ATM that is encoded in the genome of human. [PRO:CNA] | Homo sapiens (human) |
| DNA-dependent protein kinase catalytic subunit | A DNA-dependent protein kinase catalytic subunit that is encoded in the genome of human. [PRO:DNx, UniProtKB:P78527] | Homo sapiens (human) |
| DNA polymerase beta | A DNA polymerase beta that is encoded in the genome of human. [PRO:CNA] | Homo sapiens (human) |
| Lysine-specific demethylase 2A | A lysine-specific demethylase 2A that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9Y2K7] | Homo sapiens (human) |
| DNA polymerase lambda | A DNA polymerase lambda that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9UGP5] | Homo sapiens (human) |
| DNA-directed DNA/RNA polymerase mu | A DNA-directed DNA/RNA polymerase mu that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NP87] | Homo sapiens (human) |
| DNA repair endonuclease XPF | A DNA repair endonuclease XPF that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
| Histone-lysine N-methyltransferase SETMAR | A histone-lysine N-methyltransferase SETMAR that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q53H47] | Homo sapiens (human) |
| Serine-protein kinase ATM | A serine-protein kinase ATM that is encoded in the genome of human. [PRO:CNA] | Homo sapiens (human) |
| TP53-binding protein 1 | A TP53-binding protein 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q12888] | Homo sapiens (human) |
| DNA-dependent protein kinase catalytic subunit | A DNA-dependent protein kinase catalytic subunit that is encoded in the genome of human. [PRO:DNx, UniProtKB:P78527] | Homo sapiens (human) |
| DNA polymerase alpha catalytic subunit | A DNA polymerase alpha catalytic subunit that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
| High mobility group protein B1 | A high mobility group protein B1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P09429] | Homo sapiens (human) |
| DNA excision repair protein ERCC-1 | A DNA excision repair protein ERCC-1 that is encoded in the genome of human. [PRO:DNx] | Homo sapiens (human) |
| 26S proteasome non-ATPase regulatory subunit 14 | A 26S proteasome non-ATPase regulatory subunit 14 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O00487] | Homo sapiens (human) |
Compounds (108)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| salicylic acid | Scalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL). | monohydroxybenzoic acid | algal metabolite; antifungal agent; antiinfective agent; EC 1.11.1.11 (L-ascorbate peroxidase) inhibitor; keratolytic drug; plant hormone; plant metabolite |
| digallic acid | digallic acid: structure given in first source | benzoate ester; gallate ester | |
| vanillin | Vanilla: A plant genus of the family ORCHIDACEAE that is the source of the familiar flavoring used in foods and medicines (FLAVORING AGENTS). | benzaldehydes; monomethoxybenzene; phenols | anti-inflammatory agent; anticonvulsant; antioxidant; flavouring agent; plant metabolite |
| pd 173074 | aromatic amine; biaryl; dimethoxybenzene; pyridopyrimidine; tertiary amino compound; ureas | antineoplastic agent; EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor; fibroblast growth factor receptor antagonist | |
| oxyquinoline | Oxyquinoline: An antiseptic with mild fungistatic, bacteriostatic, anthelmintic, and amebicidal action. It is also used as a reagent and metal chelator, as a carrier for radio-indium for diagnostic purposes, and its halogenated derivatives are used in addition as topical anti-infective agents and oral antiamebics. quinolin-8-ol : A monohydroxyquinoline that is quinoline substituted by a hydroxy group at position 8. Its fungicidal properties are used for the control of grey mould on vines and tomatoes. | monohydroxyquinoline | antibacterial agent; antifungal agrochemical; antiseptic drug; iron chelator |
| caffeine | purine alkaloid; trimethylxanthine | adenosine A2A receptor antagonist; adenosine receptor antagonist; adjuvant; central nervous system stimulant; diuretic; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; environmental contaminant; food additive; fungal metabolite; geroprotector; human blood serum metabolite; mouse metabolite; mutagen; plant metabolite; psychotropic drug; ryanodine receptor agonist; xenobiotic | |
| cgs 15943 | 9-chloro-2-(2-furyl)-(1,2,4)triazolo(1,5-c)quinazolin-5-imine: non-xanthine triazoloquinazoline adenosine antagonist CGS 15943 : A member of the class of triazoloquinazolines that is [1,2,4]triazolo[1,5-c]quinazoline substited at positions 2, 5 and 9 by furan-2-yl, amino and chloro groups respectively. A potent antagonist at adenosine A1 and adenosine A2A receptors. | aromatic amine; biaryl; furans; organochlorine compound; primary amino compound; quinazolines; triazoloquinazoline | adenosine A1 receptor antagonist; adenosine A2A receptor antagonist; antineoplastic agent; central nervous system stimulant |
| deferiprone | deferiprone : A member of the class of 4-pyridones that is pyridin-4(1H)-one substituted at positions 1 and 2 by methyl groups and at position 3 by a hydroxy group. A lipid-soluble iron-chelator used for treatment of thalassaemia. Deferiprone: A pyridone derivative and iron chelator that is used in the treatment of IRON OVERLOAD in patients with THALASSEMIA. | 4-pyridones | iron chelator; protective agent |
| diflunisal | diflunisal : An organofluorine compound comprising salicylic acid having a 2,4-difluorophenyl group at the 5-position. Diflunisal: A salicylate derivative and anti-inflammatory analgesic with actions and side effects similar to those of ASPIRIN. | monohydroxybenzoic acid; organofluorine compound | non-narcotic analgesic; non-steroidal anti-inflammatory drug |
| foscarnet | Foscarnet: An antiviral agent used in the treatment of cytomegalovirus retinitis. Foscarnet also shows activity against human herpesviruses and HIV. phosphonoformic acid : Phosphoric acid in which one of the hydroxy groups is replaced by a carboxylic acid group. It is used as the trisodium salt as an antiviral agent in the treatment of cytomegalovirus retinitis (CMV retinitis, an inflamation of the retina that can lead to blindness) and as an alternative to ganciclovir for AIDS patients who require concurrent antiretroviral therapy but are unable to tolerate ganciclovir due to haematological toxicity. | carboxylic acid; one-carbon compound; phosphonic acids | antiviral drug; geroprotector; HIV-1 reverse transcriptase inhibitor; sodium-dependent Pi-transporter inhibitor |
| 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 |
| succinylacetone | 4,6-dioxoheptanoic acid : A dioxo monocarboxylic acid that is heptanoic acid in which oxo groups replace the hydrogens at positions 4 and 6. It is an abnormal metabolite of the tyrosine metabolic pathway and a marker for type 1 tyrosinaemia. succinylacetone: inhibitor of heme biosynthesis | beta-diketone; dioxo monocarboxylic acid | human metabolite |
| suramin | suramin : A member of the class of phenylureas that is urea in which each of the amino groups has been substituted by a 3-({2-methyl-5-[(4,6,8-trisulfo-1-naphthyl)carbamoyl]phenyl}carbamoyl)phenyl group. An activator of both the rabbit skeletal muscle RyR1 and sheep cardiac RyR2 isoform ryanodine receptor channels, it has been used for the treatment of human African trypanosomiasis for over 100 years. Suramin: A polyanionic compound with an unknown mechanism of action. It is used parenterally in the treatment of African trypanosomiasis and it has been used clinically with diethylcarbamazine to kill the adult Onchocerca. (From AMA Drug Evaluations Annual, 1992, p1643) It has also been shown to have potent antineoplastic properties. | naphthalenesulfonic acid; phenylureas; secondary carboxamide | angiogenesis inhibitor; antinematodal drug; antineoplastic agent; apoptosis inhibitor; EC 2.7.11.13 (protein kinase C) inhibitor; GABA antagonist; GABA-gated chloride channel antagonist; purinergic receptor P2 antagonist; ryanodine receptor agonist; trypanocidal drug |
| trifluoperazine | N-alkylpiperazine; N-methylpiperazine; organofluorine compound; phenothiazines | antiemetic; calmodulin antagonist; dopaminergic antagonist; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; EC 5.3.3.5 (cholestenol Delta-isomerase) inhibitor; phenothiazine antipsychotic drug | |
| pamoic acid | pamoic acid: RN given refers to parent cpd; structure | dicarboxylic acid | |
| Dillapiole | 5-allyl 6,7-dimethoxy 1,3-benzodioxole: a plant based insecticide; structure in first source | benzodioxoles | metabolite |
| 2,4-pyridinedicarboxylic acid | lutidinic acid : A pyridinedicarboxylic acid carrying carboxy groups at positions 2 and 4. | pyridinedicarboxylic acid | |
| oleanolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | plant metabolite | |
| 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 |
| 8-aminoquinoline | |||
| alpha-naphthoflavone | alpha-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the h side of flavone. A synthetic compound, it is an inhibitor of aromatase (EC 1.14.14.14). alpha-naphthoflavone: inhibits P4501A1 and P4501A2; stimulates some activities of P4503A4 | extended flavonoid; naphtho-gamma-pyrone; organic heterotricyclic compound | aryl hydrocarbon receptor agonist; aryl hydrocarbon receptor antagonist; EC 1.14.14.14 (aromatase) inhibitor |
| 8-methylquinoline | methylquinoline | ||
| glycyrrhizic acid | glycyrrhizinic acid : A triterpenoid saponin that is the glucosiduronide derivative of 3beta-hydroxy-11-oxoolean-12-en-30-oic acid. | enone; glucosiduronic acid; pentacyclic triterpenoid; tricarboxylic acid; triterpenoid saponin | EC 3.4.21.5 (thrombin) inhibitor; plant metabolite |
| daminozide | daminozide: induces tumors | straight-chain fatty acid | |
| ochracin | ochracin: produced by Aspergillus alutaceus; structure in first source | isochromanes | |
| zidovudine | zidovudine : A pyrimidine 2',3'-dideoxyribonucleoside compound having a 3'-azido substituent and thymine as the nucleobase. Zidovudine: A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by an azido group. This modification prevents the formation of phosphodiester linkages which are needed for the completion of nucleic acid chains. The compound is a potent inhibitor of HIV replication, acting as a chain-terminator of viral DNA during reverse transcription. It improves immunologic function, partially reverses the HIV-induced neurological dysfunction, and improves certain other clinical abnormalities associated with AIDS. Its principal toxic effect is dose-dependent suppression of bone marrow, resulting in anemia and leukopenia. | azide; pyrimidine 2',3'-dideoxyribonucleoside | antimetabolite; antiviral drug; HIV-1 reverse transcriptase inhibitor |
| ursolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | geroprotector; plant metabolite | |
| thymidine 5'-triphosphate | dTTP : A thymidine phosphate having a triphosphate group at the 5'-position. thymidine 5'-triphosphate: RN given refers to parent cpd | pyrimidine 2'-deoxyribonucleoside 5'-triphosphate; thymidine phosphate | Escherichia coli metabolite; mouse metabolite |
| betulinic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | anti-HIV agent; anti-inflammatory agent; antimalarial; antineoplastic agent; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; plant metabolite | |
| calanolide a | (+)-calanolide A : An organic heterotetracyclic compound that is 11,12-dihydro-2H,6H,10H-dipyrano[2,3-f:2',3'-h]chromen-2-one substituted by a hydroxy group at position 12, methyl groups at positions 6, 6, 10 and 11 and a propyl group at position 4 (the 10R,11S,12S stereoisomer). Isolated from Calophyllum lanigerum var austrocoriaceum and Calophyllum brasiliense, it exhibits potent activity against HIV-1 reverse transcriptase. calanolide A: NSC 661122 and costatolide are isomers; a novel HIV-inhibitory class of coumarin derivatives from the tropical rainforest tree, Calophyllum lanigerum (Clusiaceae); structure in first source | cyclic ether; delta-lactone; organic heterotetracyclic compound; secondary alcohol | HIV-1 reverse transcriptase inhibitor; plant metabolite |
| 2',3'-dideoxythymidine triphosphate | ddTTP : A pyrimidine 2',3'-dideoxyribonucleoside 5'-triphosphate having thymine as the nucleobase. | pyrimidine 2',3'-dideoxyribonucleoside 5'-triphosphate; thymidine phosphate | |
| 2',3'-dideoxyadenosine triphosphate | purine deoxyribonucleoside triphosphate | ||
| zidovudine triphosphate | |||
| illimaquinone | illimaquinone: structure given in first source; isolated from the Red Sea sponge Smenospongia; inhibits the RNase H. activity of HIV-1 reverse transcriptase | monohydroxy-1,4-benzoquinones; prenylquinone | metabolite |
| n-hydroxynaphthalimide | N-hydroxynaphthalimide: structure in first source | ||
| 4,5-dimethoxy-2-nitrobenzaldehyde | aromatic ether; C-nitro compound | ||
| 8-mercaptoquinoline | 8-mercaptoquinoline: structure given in first source | ||
| schizandrin b | schizandrin B: a phytogenic antineoplastic agent with anti-inflammatory activity; isolated from Schisandra plant | ||
| gefitinib | aromatic ether; monochlorobenzenes; monofluorobenzenes; morpholines; quinazolines; secondary amino compound; tertiary amino compound | antineoplastic agent; epidermal growth factor receptor antagonist | |
| methotrexate | dicarboxylic acid; monocarboxylic acid amide; pteridines | abortifacient; antimetabolite; antineoplastic agent; antirheumatic drug; dermatologic drug; DNA synthesis inhibitor; EC 1.5.1.3 (dihydrofolate reductase) inhibitor; immunosuppressive agent | |
| 2-(4-morpholinyl)-4h-1-benzopyran-4-one | 2-(4-morpholinyl)-4H-1-benzopyran-4-one: an aminochromone; exhibits both antiproliferative and antichemotactic activity in vitro | ||
| sorafenib | (trifluoromethyl)benzenes; aromatic ether; monochlorobenzenes; phenylureas; pyridinecarboxamide | angiogenesis inhibitor; anticoronaviral agent; antineoplastic agent; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor; ferroptosis inducer; tyrosine kinase inhibitor | |
| 3-hydroxy-quinazoline-2,4-dione | 3-hydroxy-quinazoline-2,4-dione: structure in first source | ||
| sitosterol, (3beta)-isomer | sitosterol : A member of the class of phytosterols that is stigmast-5-ene substituted by a beta-hydroxy group at position 3. Sobatum: tradename; active fraction of Solanum trilobatum; reduces side-effects of radiation-induced toxicity | 3beta-hydroxy-Delta(5)-steroid; 3beta-sterol; C29-steroid; phytosterols; stigmastane sterol | anticholesteremic drug; antioxidant; mouse metabolite; plant metabolite; sterol methyltransferase inhibitor |
| 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 | |
| bortezomib | amino acid amide; L-phenylalanine derivative; pyrazines | antineoplastic agent; antiprotozoal drug; protease inhibitor; proteasome inhibitor | |
| d-2-hydroxyglutarate | (R)-2-hydroxyglutaric acid : The (R)-enantiomer of 2-hydroxyglutaric acid. | 2-hydroxyglutaric acid | algal metabolite |
| alpha-hydroxyglutarate, (l)-isomer | 2-hydroxyglutaric acid | ||
| resveratrol | trans-resveratrol : A resveratrol in which the double bond has E configuration. | resveratrol | antioxidant; phytoalexin; plant metabolite; quorum sensing inhibitor; radical scavenger |
| TTP | pyrimidine ribonucleoside 5'-triphosphate | ||
| aphidicolin | aphidicolin : A tetracyclic diterpenoid that has an tetradecahydro-8,11a-methanocyclohepta[a]naphthalene skeleton with two hydroxymethyl substituents at positions 4 and 9, two methyl substituents at positions 4 and 11b and two hydroxy substituents at positions 3 and 9. An antibiotic with antiviral and antimitotical properties. Aphidicolin is a reversible inhibitor of eukaryotic nuclear DNA replication. Aphidicolin: An antiviral antibiotic produced by Cephalosporium aphidicola and other fungi. It inhibits the growth of eukaryotic cells and certain animal viruses by selectively inhibiting the cellular replication of DNA polymerase II or the viral-induced DNA polymerases. The drug may be useful for controlling excessive cell proliferation in patients with cancer, psoriasis or other dermatitis with little or no adverse effect upon non-multiplying cells. | tetracyclic diterpenoid | antimicrobial agent; antimitotic; antineoplastic agent; antiviral drug; apoptosis inducer; Aspergillus metabolite; DNA synthesis inhibitor; EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor; fungal metabolite |
| 5-carboxy-8-hydroxyquinoline | 5-carboxy-8-hydroxyquinoline: a JmjC histone demethylase inhibitor; structure in first source | quinolines | |
| pnu183792 | PNU183792: structure in first source | ||
| (1R,2S)-tranylcypromine hydrochloride | (1R,2S)-tranylcypromine hydrochloride : A hydrochloride obtained by combining (1R,2S)-tranylcypromine with one equivalent of hydrochloric acid. | hydrochloride | |
| thiourea | thiourea : The simplest member of the thiourea class, consisting of urea with the oxygen atom substituted by sulfur. Thiourea: A photographic fixative used also in the manufacture of resins. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), this substance may reasonably be anticipated to be a carcinogen (Merck Index, 9th ed). Many of its derivatives are ANTITHYROID AGENTS and/or FREE RADICAL SCAVENGERS. | one-carbon compound; thioureas; ureas | antioxidant; chromophore |
| dasatinib | dasatinib (anhydrous) : An aminopyrimidine that is 2-methylpyrimidine which is substituted at position 4 by the primary amino group of 2-amino-1,3-thiazole-5-carboxylic acid and at position 6 by a 4-(2-hydroxyethyl)piperazin-1-yl group, and in which the carboxylic acid group has been formally condensed with 2-chloro-6-methylaniline to afford the corresponding amide. A multi-targeted kinase inhibitor, it is used, particularly as the monohydrate, for the treatment of chronic, accelerated, or myeloid or lymphoid blast phase chronic myeloid leukemia. Note that the name 'dasatinib' is used to refer to the monohydrate (USAN) as well as to anhydrous dasatinib (INN). N-(2-chloro-6-methylphenyl)-2-((6-(4-(2-hydroxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-yl)amino)-1,3-thiazole-5-carboxamide: a dasatinib prodrug; structure in first source | 1,3-thiazoles; aminopyrimidine; monocarboxylic acid amide; N-(2-hydroxyethyl)piperazine; N-arylpiperazine; organochlorine compound; secondary amino compound; tertiary amino compound | anticoronaviral agent; antineoplastic agent; tyrosine kinase inhibitor |
| oxalylglycine | N-oxalylglycine : An amino dicarboxylic acid that is iminodiacetic acid with an oxo substituent. It is used as an inhibitor of alpha-ketoglutarate dependent (EC 1.14.11.*) enzymes. oxalylglycine: structure given in first source | amino dicarboxylic acid; N-acylglycine | EC 1.14.11.* (oxidoreductase acting on paired donors, 2-oxoglutarate as one donor, incorporating 1 atom each of oxygen into both donors) inhibitor |
| uccf-029 | organic heterotricyclic compound; organooxygen compound | ||
| ku 55933 | 2-morpholin-4-yl-6-thianthren-1-yl-pyran-4-one: specific inhibitor of the ataxia-telangiectasia mutated kinase ATM; structure in first source | ||
| stigmasterol | stigmasta-5,22-dien-3-ol: isolated from freeze-dried powder of Blackberries (Rubus ursinus L.) which showed an activity on inhibition of chemocarcinogen stigmasterol : A 3beta-sterol that consists of 3beta-hydroxystigmastane having double bonds at the 5,6- and 22,23-positions. | 3beta-hydroxy-Delta(5)-steroid; 3beta-sterol; phytosterols; stigmastane sterol | plant metabolite |
| pecilocin | pecilocin: fungicidal antibiotic produced by Paecilomyces varioti Bainier var. antibioticus; structure | N-acylpyrrolidine | |
| su 11248 | monocarboxylic acid amide; pyrroles | angiogenesis inhibitor; antineoplastic agent; EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor; immunomodulator; neuroprotective agent; vascular endothelial growth factor receptor antagonist | |
| lyoniside | daucosterol : A steroid saponin that is sitosterol attached to a beta-D-glucopyranosyl residue at position 3 via a glycosidic linkage. It has bee isolated from Panax japonicus var. major and Breynia fruticosa. | beta-D-glucoside; monosaccharide derivative; steroid saponin | plant metabolite |
| tanespimycin | CP 127374: analog of herbimycin A | 1,4-benzoquinones; ansamycin; carbamate ester; organic heterobicyclic compound; secondary amino compound | antineoplastic agent; apoptosis inducer; Hsp90 inhibitor |
| cgk 733 | diarylmethane | ||
| corosolic acid | triterpenoid | metabolite | |
| ic 86621 | 1-(2-hydroxy-4-morpholin-4-ylphenyl)ethanone: a DNA-dependent protein kinase inhibitor | aromatic ketone | |
| 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 |
| oblongifolin c | oblongifolin C: has antineoplastic activity; isolated from Garcinia yunnanensis; structure in first source | ||
| edgeworin | edgeworin: from Dirca occidentalis Gray; structure given in first source | ||
| nu 7441 | 8-dibenzothiophen-4-yl-2-morpholin-4-yl-chromen-4-one: structure in first source | dibenzothiophenes | |
| carfilzomib | epoxide; morpholines; tetrapeptide | antineoplastic agent; proteasome inhibitor | |
| 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 |
| ku-0060648 | dibenzothiophenes | ||
| 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 |
| ku 60019 | |||
| sch 725680 | Sch 725680: an aazaphilone from Aspergillus sp.; structure in first source | ||
| guttiferone k | guttiferone K: antiproliferative compound of Rheedia calcicola from the Madagascar rain forest; structure in first source | ||
| 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 |
| ku 0063794 | Ku 0063794: an mTOR inhibitor; structure in first source | benzyl alcohols; monomethoxybenzene; morpholines; pyridopyrimidine; tertiary amino compound | antineoplastic agent; mTOR 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 |
| PP121 | aromatic amine; cyclopentanes; pyrazolopyrimidine; pyrrolopyridine | antineoplastic agent; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; tyrosine kinase inhibitor | |
| belactosin a | belactosin A: isolated from Streptomyces; structure in first source | ||
| gdc 0980 | |||
| pki 587 | gedatolisib: inhibits both phosphatidylinositol 3-kinase and mTOR; structure in first source | ||
| cp 466722 | quinazolines | ||
| (3R)-4-[2-(1H-indol-4-yl)-6-(1-methylsulfonylcyclopropyl)-4-pyrimidinyl]-3-methylmorpholine | indoles | ||
| (5-bromo-3-pyridinyl)-[4-(1-pyrrolidinyl)-1-piperidinyl]methanone | aromatic carboxylic acid; pyridinemonocarboxylic acid | ||
| 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 |
| ve 821 | 3-amino-6-(4-(methylsulfonyl)phenyl)-N-phenylpyrazine-2-carboxamide: an antineoplastic agent; structure in first source | aromatic amide | |
| gdc-0032 | |||
| 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 |
| cudc-907 | |||
| raltegravir | 1,2,4-oxadiazole; dicarboxylic acid amide; hydroxypyrimidine; monofluorobenzenes; pyrimidone; secondary carboxamide | antiviral drug; HIV-1 integrase inhibitor | |
| sar245408 | |||
| byl719 | proline derivative | ||
| GS-443902 | GS-441524 triphosphate: intracellular active metabolite of remdesivir GS-443902 : An organic triphosphate that is GS-441524 in which the 5'-hydroxy group has been replaced by a triphosphate group. It is the active metabolite of remdesivir. | aromatic amine; C-nucleoside; nitrile; organic triphosphate; pyrrolotriazine | anticoronaviral agent; antiviral drug; drug metabolite |
| 3-[[2-(2-pyridinyl)-6-(1,2,4,5-tetrahydro-3-benzazepin-3-yl)-4-pyrimidinyl]amino]propanoic acid | organonitrogen heterocyclic compound | ||
| pinophilin b | pinophilin B: from cultures of a fungus (Penicillium pinophilum Hedgcok) derived from a seaweed; structure in first source | ||
| entecavir | benzamides; N-acylpiperidine | ||
| cc-115 | 1-ethyl-7-(2-methyl-6-(1H-1,2,4-triazol-3-yl)pyridin-3-yl)-3,4-dihydropyrazino(2,3-b)pyrazin-2(1H)-one: an mTOR kinase inhibitor; structure in first source | ||
| vx-970 | berzosertib: an ATR kinase inhibitor | sulfonamide | |
| 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 |
| etp-46464 | ETP-46464: inhibits ATM and Rad3-related kinase; structure in first source | ||
| isogranulatimide | isogranulatimide: G2 checkpoint inhibitor; structure in first source | ||
| n(2)-(4-n-butylphenyl) 2'-deoxyguanosine | N(2)-(4-n-butylphenyl) 2'-deoxyguanosine: RN & structure given in first source | ||
| pp242 | torkinib : A member of the class of pyrazolopyrimidines that is 1H-pyrazolo[3,4-d]pyrimidine substituted by isopropyl, 5-hydroxyindol-2-yl and amino groups at positions 1, 3 and 4 respectively. It is a potent inhibitor of mTOR and exhibits anti-cancer properties. | aromatic amine; biaryl; hydroxyindoles; phenols; primary amino compound; pyrazolopyrimidine | antineoplastic agent; mTOR inhibitor |