Page last updated: 2024-10-24
UV-damage excision repair
Definition
Target type: biologicalprocess
A DNA repair process that is initiated by an endonuclease that introduces a single-strand incision immediately 5' of a UV-induced damage site. UV-damage excision repair acts on both cyclobutane pyrimidine dimers (CPDs) and pyrimidine-pyrimidone 6-4 photoproducts (6-4PPs). [GOC:mah, PMID:9619100]
UV-damage excision repair is a crucial cellular process that removes DNA lesions caused by ultraviolet (UV) radiation, which can lead to mutations, cancer, and cell death. This complex process involves several steps:
1. **Damage Detection:** UV radiation induces the formation of DNA lesions, primarily cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone photoproducts (6-4PPs). These lesions distort the DNA helix and interfere with replication and transcription.
2. **Damage Recognition:** Specialized proteins called damage recognition factors, such as the XPC-RAD23B complex, recognize and bind to the DNA lesions. This complex then recruits other repair proteins to the site of damage.
3. **Excision:** Two key enzymes, a 5' to 3' exonuclease (ERCC1-XPF) and a 3' to 5' exonuclease (XPG), are recruited to the lesion site. The exonucleases cleave the damaged DNA strand on either side of the lesion, removing a short oligonucleotide containing the damaged nucleotides.
4. **Gap Filling:** DNA polymerase delta or epsilon fills the gap created by the exonucleases, using the undamaged strand as a template to synthesize a new DNA segment.
5. **Ligation:** DNA ligase I seals the newly synthesized DNA segment into the original strand, completing the repair process.
This intricate process ensures the integrity of the genome and protects cells from the harmful effects of UV radiation. Errors in UV-damage excision repair can result in mutations that contribute to the development of skin cancer.'
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Proteins (4)
| Protein | Definition | Taxonomy |
|---|---|---|
| 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) |
| NAD-dependent protein deacetylase sirtuin-1 | An NAD-dependent protein deacetylase sirtuin-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96EB6] | Homo sapiens (human) |
| DNA damage-binding protein 1 | A DNA damage-binding protein 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q16531] | Homo sapiens (human) |
| Melanocyte-stimulating hormone receptor | A melanocyte-stimulating hormone receptor that is encoded in the genome of human. [PRO:WCB, UniProtKB:Q01726] | Homo sapiens (human) |
Compounds (48)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| niacinamide | nicotinamide : A pyridinecarboxamide that is pyridine in which the hydrogen at position 3 is replaced by a carboxamide group. | pyridine alkaloid; pyridinecarboxamide; vitamin B3 | anti-inflammatory agent; antioxidant; cofactor; EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; Escherichia coli metabolite; geroprotector; human urinary metabolite; metabolite; mouse metabolite; neuroprotective agent; Saccharomyces cerevisiae metabolite; Sir2 inhibitor |
| bisindolylmaleimide i | bisindolylmaleimide I: a bis(indolyl)maleimide | ||
| bisindolylmaleimide v | bisindolylmaleimide V: used as a negative control compound for protein kinase C inhibition; structure in first source; | indoles | |
| entinostat | benzamides; carbamate ester; primary amino compound; pyridines; substituted aniline | antineoplastic agent; apoptosis inducer; EC 3.5.1.98 (histone deacetylase) inhibitor | |
| fenamic acid | fenamic acid : An aminobenzoic acid that is the N-phenyl derivative of anthranilic acid. It acts as a parent skeleton for the synthesis of several non-steroidal anti-inflammatory drugs. fenamic acid: has chloride and potassium channel-blocking activity; RN given refers to parent cpd | aminobenzoic acid; secondary amino compound | membrane transport modulator |
| ro 31-8220 | Ro 31-8220: a protein kinase C inhibitor | imidothiocarbamic ester; indoles; maleimides | EC 2.7.11.13 (protein kinase C) inhibitor |
| fenofibrate | benzochromenone; delta-lactone; naphtho-alpha-pyrone | platelet aggregation inhibitor; Sir2 inhibitor | |
| 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 |
| thalidomide | 2-(2,6-dioxopiperidin-3-yl)-1H-isoindole-1,3(2H)-dione : A dicarboximide that is isoindole-1,3(2H)-dione in which the hydrogen attached to the nitrogen is substituted by a 2,6-dioxopiperidin-3-yl group. thalidomide : A racemate comprising equimolar amounts of R- and S-thalidomide. Thalidomide: A piperidinyl isoindole originally introduced as a non-barbiturate hypnotic, but withdrawn from the market due to teratogenic effects. It has been reintroduced and used for a number of immunological and inflammatory disorders. Thalidomide displays immunosuppressive and anti-angiogenic activity. It inhibits release of TUMOR NECROSIS FACTOR-ALPHA from monocytes, and modulates other cytokine action. | phthalimides; piperidones | |
| nad | NAD | geroprotector | |
| 4-tert-butylbenzoic acid | 4-tert-butylbenzoic acid: RN given refers to parent cpd | alkylbenzene | |
| suramin sodium | suramin sodium : An organic sodium salt that is the hexasodium salt of suramin. It is an FDA approved drug for African sleeping sickness and river blindness. | organic sodium salt | 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 |
| toxoflavin | toxoflavin : A pyrimidotriazine that is 1,6-dimethyl-1,5,6,7-tetrahydropyrimido[5,4-e][1,2,4]triazine with oxo groups at positions 5 and 7. toxoflavin: azapteridine antibiotic; structure | carbonyl compound; pyrimidotriazine | antibacterial agent; antineoplastic agent; apoptosis inducer; bacterial metabolite; toxin; virulence factor; Wnt signalling inhibitor |
| n-hydroxynaphthalimide | N-hydroxynaphthalimide: structure in first source | ||
| melanotan-ii | melanotan-II: synthetic cyclic heptapeptide, an analog of alpha-melanotropin (4,10); capable of stimulating melanin synthesis & promoting rapid tanning of skin; currently in trials for use in the prevention of sunlight-induced skin cancer | organic molecular entity | |
| pomalidomide | 3-aminophthalimidoglutarimide: structure in first source | aromatic amine; dicarboximide; isoindoles; piperidones | angiogenesis inhibitor; antineoplastic agent; immunomodulator |
| lenalidomide | aromatic amine; dicarboximide; isoindoles; piperidones | angiogenesis inhibitor; antineoplastic agent; immunomodulator | |
| 3-hydroxy-quinazoline-2,4-dione | 3-hydroxy-quinazoline-2,4-dione: structure in first source | ||
| paullone | paullone : An indolobenzazepine that is 5,6,7,12-tetrahydroindolo[3,2-d][1]benzazepine carrying an oxo substituent at position 6. paullone: structure in first source | indolobenzazepine; lactam | EC 2.7.11.22 (cyclin-dependent kinase) inhibitor; EC 2.7.11.26 (tau-protein kinase) inhibitor |
| hyperforin | hyperforin : A cyclic terpene ketone that is a prenylated carbobicyclic acylphloroglucinol derivative produced by St. John's Wort, Hypericum perforatum. hyperforin: a prenylated acylphloroglucinol derivative; antibiotic component of novoimanine; psychoactive agent in St. John's wort; Russian; structure; | ||
| surfactin c | surfactin C : A cyclodepsipeptide that is N-[(3R)-3-hydroxy-13-methyltetradecanoyl]-L-alpha-glutamyl-L-leucyl-D-leucyl-L-valyl-L-alpha-aspartyl-D-leucyl-L-leucine in which the C-terminal carboxy group has been lactonised by condensation with the alcoholic hydroxy group. | cyclodepsipeptide; lipopeptide antibiotic; macrocyclic lactone | antibacterial agent; antifungal agent; antineoplastic agent; antiviral agent; metabolite; platelet aggregation inhibitor; surfactant |
| resveratrol | trans-resveratrol : A resveratrol in which the double bond has E configuration. | resveratrol | antioxidant; phytoalexin; plant metabolite; quorum sensing inhibitor; radical scavenger |
| CHIC-35 | CHIC-35 : An organic heterotricyclic compound resulting from the formal fusion of the 2-3 bond of 5-chloroindole with the 2-3 bond of cycloheptanecarboxamide (the S enantiomer). It is a potent, cell-permeable, metabolically stable and selective inhibitor of the deacetylase SIRT1. | aromatic compound; organic heterotricyclic compound; organochlorine compound; primary carboxamide | EC 3.5.1.98 (histone deacetylase) inhibitor |
| 3-(1-azepanylsulfonyl)-n-(3-bromphenyl)benzamide | 3-(1-azepanylsulfonyl)-N-(3-bromphenyl)benzamide: a sirtuin 2 inhibitor; structure in first source | ||
| CAY10591 | CAY10591: a SIRT1 NAD-dependent histone deacetylase activator | quinoxaline derivative | |
| sirtinol | aldimine; benzamides; naphthols | anti-inflammatory agent; EC 3.5.1.98 (histone deacetylase) inhibitor; Sir2 inhibitor | |
| cambinol | cambinol: inhibitor of human silent information regulator 2 enzymes; structure in first source | ||
| (4-chlorophenyl)-[4-(8-nitro-5-quinolinyl)-1-piperazinyl]methanone | N-arylpiperazine | ||
| ex 527 | 6-chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide : A member of the class of carbazoles that is 2,3,4,9-tetrahydro-1H-carbazole which is substituted at position 1 by an aminocarbohyl group and at position 6 by a chlorine. 6-chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide: structure in first source | carbazoles; monocarboxylic acid amide; organochlorine compound | |
| 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 |
| bms-470539 | BMS-470539: a selective small molecule agonist of the melanocortin-1 receptor inhibits lipopolysaccharide-induced cytokine accumulation and leukocyte infiltration in mice; structure in first source | ||
| bremelanotide | bremelanotide: a synthetic peptide analogue of alpha-MSH, is an agonist at melanocortin receptors including the MC3R and MC4R, which are expressed primarily in the central nervous system; | oligopeptide | |
| oblongifolin c | oblongifolin C: has antineoplastic activity; isolated from Garcinia yunnanensis; structure in first source | ||
| acetyl-histidyl-phenylalanyl-arginyl-tryptophanamide | |||
| ac-his-dphe-arg-trp-nh2 | |||
| quisinostat | indoles | ||
| rm-493 | setmelanotide: an anti-obesity agent | ||
| alpha-msh | peptide hormone | anti-inflammatory agent | |
| msh, 4-nle-7-phe-alpha- | polypeptide | dermatologic drug | |
| srt1460 | SRT1460: small molecule activator of SIRT1 as therapeutics for the treatment of type 2 diabetes; structure in first source | ||
| srt1720 | |||
| srt2183 | SRT2183: small molecule activator of SIRT1 as therapeutics for the treatment of type 2 diabetes; structure in first source | ||
| tenovin-6 | tenovin-6 : A monocarboxylic acid amide obtained by formal condensation of the carboxy group of 5-(dimethylamino)pentanoic acid with the aromatic amino group of N-[(4-aminophenyl)carbamothioyl]-4-tert-butylbenzamide. | monocarboxylic acid amide; tertiary amino compound; thioureas | antineoplastic agent; p53 activator; Sir2 inhibitor |
| jq1 compound | carboxylic ester; organochlorine compound; tert-butyl ester; thienotriazolodiazepine | angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; apoptosis inducer; bromodomain-containing protein 4 inhibitor; cardioprotective agent; ferroptosis inducer | |
| acy-1215 | ricolinostat: an HDAC6 inhibitor; structure in first source | pyrimidinecarboxylic acid | |
| aristoforin | Aristoforin: derivative of hyperforin, is a potent anticancer agent; structure in first source | ||
| MZ1 | organic molecular entity | ||
| n-(3-((2-hydroxynaphthalen-1-ylmethylene)amino)phenyl)-2-phenylpropionamide |