General Information of Drug Off-Target (DOT) (ID: OT40A9WH)

DOT Name Methylated-DNA--protein-cysteine methyltransferase (MGMT)
Synonyms EC 2.1.1.63; 6-O-methylguanine-DNA methyltransferase; MGMT; O-6-methylguanine-DNA-alkyltransferase
Gene Name MGMT
UniProt ID
MGMT_HUMAN
3D Structure
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2D Sequence (FASTA)
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3D Structure (PDB)
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PDB ID
1EH6; 1EH7; 1EH8; 1QNT; 1T38; 1T39; 1YFH
EC Number
2.1.1.63
Pfam ID
PF01035 ; PF02870
Sequence
MDKDCEMKRTTLDSPLGKLELSGCEQGLHEIKLLGKGTSAADAVEVPAPAAVLGGPEPLM
QCTAWLNAYFHQPEAIEEFPVPALHHPVFQQESFTRQVLWKLLKVVKFGEVISYQQLAAL
AGNPKAARAVGGAMRGNPVPILIPCHRVVCSSGAVGNYSGGLAVKEWLLAHEGHRLGKPG
LGGSSGLAGAWLKGAGATSGSPPAGRN
Function
Involved in the cellular defense against the biological effects of O6-methylguanine (O6-MeG) and O4-methylthymine (O4-MeT) in DNA. Repairs the methylated nucleobase in DNA by stoichiometrically transferring the methyl group to a cysteine residue in the enzyme. This is a suicide reaction: the enzyme is irreversibly inactivated.
Reactome Pathway
MGMT-mediated DNA damage reversal (R-HSA-5657655 )

Molecular Interaction Atlas (MIA) of This DOT

Molecular Interaction Atlas (MIA) Jump to Detail Molecular Interaction Atlas of This DOT
This DOT Affected the Drug Response of 10 Drug(s)
Drug Name Drug ID Highest Status Interaction REF
Doxorubicin DMVP5YE Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of Doxorubicin. [36]
Temozolomide DMKECZD Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of Temozolomide. [37]
DTI-015 DMXZRW0 Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of DTI-015. [37]
Mitomycin DMH0ZJE Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) increases the response to substance of Mitomycin. [38]
Beta-carotene DM0RXBT Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) affects the response to substance of Beta-carotene. [39]
Fotemustine DMV62ED Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of Fotemustine. [40]
Lomustine DMMWSUL Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of Lomustine. [41]
Streptozocin DMOF7AT Approved Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of Streptozocin. [38]
CYSTEMUSTINE DM0DT45 Phase 2 Methylated-DNA--protein-cysteine methyltransferase (MGMT) affects the response to substance of CYSTEMUSTINE. [42]
acrolein DMAMCSR Investigative Methylated-DNA--protein-cysteine methyltransferase (MGMT) decreases the response to substance of acrolein. [43]
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⏷ Show the Full List of 10 Drug(s)
36 Drug(s) Affected the Gene/Protein Processing of This DOT
Drug Name Drug ID Highest Status Interaction REF
Ciclosporin DMAZJFX Approved Ciclosporin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [1]
Acetaminophen DMUIE76 Approved Acetaminophen decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [2]
Cisplatin DMRHGI9 Approved Cisplatin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [3]
Ivermectin DMDBX5F Approved Ivermectin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [4]
Decitabine DMQL8XJ Approved Decitabine increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [6]
Fluorouracil DMUM7HZ Approved Fluorouracil decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [7]
Dexamethasone DMMWZET Approved Dexamethasone increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [8]
Irinotecan DMP6SC2 Approved Irinotecan decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [9]
Azacitidine DMTA5OE Approved Azacitidine increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [10]
Topotecan DMP6G8T Approved Topotecan decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [9]
Gemcitabine DMSE3I7 Approved Gemcitabine decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [11]
Cyclophosphamide DM4O2Z7 Approved Cyclophosphamide decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [12]
Acocantherin DM7JT24 Approved Acocantherin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [13]
Hydralazine DMU8JGH Approved Hydralazine increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [15]
Dacarbazine DMNPZL4 Approved Dacarbazine decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [16]
Silymarin DMXBYQR Phase 4 Silymarin increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [17]
Epigallocatechin gallate DMCGWBJ Phase 3 Epigallocatechin gallate increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [18]
Curcumin DMQPH29 Phase 3 Curcumin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [19]
Fenretinide DMRD5SP Phase 3 Fenretinide increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [17]
Camptothecin DM6CHNJ Phase 3 Camptothecin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [9]
Guanine DMIWLJE Phase 3 Guanine decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [20]
Laromustine DMH2EA1 Phase 3 Laromustine decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [21]
Genistein DM0JETC Phase 2/3 Genistein increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [22]
Procysteine DMF9RB4 Phase 2 Procysteine increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [17]
Benzo(a)pyrene DMN7J43 Phase 1 Benzo(a)pyrene decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [25]
(+)-JQ1 DM1CZSJ Phase 1 (+)-JQ1 decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [26]
PMID26560530-Compound-34 DMLGZPO Patented PMID26560530-Compound-34 increases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [17]
Lomeguatrib DMW9MOK Discontinued in Phase 2 Lomeguatrib decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [27]
SB 203580 DMAET6F Terminated SB 203580 decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [28]
Milchsaure DM462BT Investigative Milchsaure decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [30]
Deguelin DMXT7WG Investigative Deguelin decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [31]
GALLICACID DM6Y3A0 Investigative GALLICACID decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [32]
Phencyclidine DMQBEYX Investigative Phencyclidine decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [33]
U0126 DM31OGF Investigative U0126 decreases the expression of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [28]
Buthionine sulfoximine DMJ46CB Investigative Buthionine sulfoximine decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [17]
methyl isocyanate DME4JGF Investigative methyl isocyanate decreases the activity of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [35]
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⏷ Show the Full List of 36 Drug(s)
4 Drug(s) Affected the Post-Translational Modifications of This DOT
Drug Name Drug ID Highest Status Interaction REF
Arsenic DMTL2Y1 Approved Arsenic affects the methylation of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [5]
Phenytoin DMNOKBV Approved Phenytoin increases the methylation of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [14]
Bisphenol A DM2ZLD7 Investigative Bisphenol A increases the methylation of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [29]
Aminohippuric acid DMUN54G Investigative Aminohippuric acid decreases the methylation of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [34]
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2 Drug(s) Affected the Protein Interaction/Cellular Processes of This DOT
Drug Name Drug ID Highest Status Interaction REF
DNCB DMDTVYC Phase 2 DNCB affects the binding of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [23]
Disulfiram DMCL2OK Phase 2 Trial Disulfiram increases the degradation of Methylated-DNA--protein-cysteine methyltransferase (MGMT). [24]
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References

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2 Multiple microRNAs function as self-protective modules in acetaminophen-induced hepatotoxicity in humans. Arch Toxicol. 2018 Feb;92(2):845-858.
3 Cisplatin represses transcriptional activity from the minimal promoter of the O6-methylguanine methyltransferase gene and increases sensitivity of human gallbladder cancer cells to 1-(4-amino-2-methyl-5-pyrimidinyl) methyl-3-2-chloroethyl)-3-nitrosourea. Oncol Rep. 2005 May;13(5):899-906.
4 Quantitative proteomics reveals a broad-spectrum antiviral property of ivermectin, benefiting for COVID-19 treatment. J Cell Physiol. 2021 Apr;236(4):2959-2975. doi: 10.1002/jcp.30055. Epub 2020 Sep 22.
5 Prenatal arsenic exposure and the epigenome: identifying sites of 5-methylcytosine alterations that predict functional changes in gene expression in newborn cord blood and subsequent birth outcomes. Toxicol Sci. 2015 Jan;143(1):97-106. doi: 10.1093/toxsci/kfu210. Epub 2014 Oct 10.
6 Epigenetic regulation of O6-methylguanine-DNA methyltransferase gene expression by histone acetylation and methyl-CpG binding proteins. Mol Cancer Ther. 2005 Jan;4(1):61-9.
7 Depletion of O6-methylguanine-DNA methyltransferase by O6-benzylguanine enhances 5-FU cytotoxicity in colon and oral cancer cell lines. Oncol Rep. 2007 Jun;17(6):1461-7.
8 Induction of the DNA repair gene O6-methylguanine-DNA methyltransferase by dexamethasone in glioblastomas. J Neurosurg. 2004 Oct;101(4):659-63. doi: 10.3171/jns.2004.101.4.0659.
9 Transcriptional repression of O6-methylguanine DNA methyltransferase gene rendering cells hypersensitive to N,N'-bis(2-chloroethyl)-N-nitrosurea in camptothecin-resistant cells. Mol Pharmacol. 2008 Aug;74(2):517-26. doi: 10.1124/mol.107.043620. Epub 2008 May 20.
10 CpG methylation-dependent repression of the human O6-methylguanine-DNA methyltransferase gene linked to chromatin structure alteration. Carcinogenesis. 2003 Aug;24(8):1337-45. doi: 10.1093/carcin/bgg086. Epub 2003 May 22.
11 Gene expression profiling of breast cancer cells in response to gemcitabine: NF-kappaB pathway activation as a potential mechanism of resistance. Breast Cancer Res Treat. 2007 Apr;102(2):157-72.
12 Comparative gene expression analysis of a chronic myelogenous leukemia cell line resistant to cyclophosphamide using oligonucleotide arrays and response to tyrosine kinase inhibitors. Leuk Res. 2007 Nov;31(11):1511-20.
13 Ouabain induces apoptotic cell death in human prostate DU 145 cancer cells through DNA damage and TRAIL pathways. Environ Toxicol. 2019 Dec;34(12):1329-1339. doi: 10.1002/tox.22834. Epub 2019 Aug 21.
14 Phenytoin may increase the efficacy of temozolomide by methylating DNA-repair enzyme, O6-methylguanine-DNA methyltransferase in patients with glioblastoma. Med Hypotheses. 2005;65(4):819-20. doi: 10.1016/j.mehy.2005.04.007.
15 A phase I study of hydralazine to demethylate and reactivate the expression of tumor suppressor genes. BMC Cancer. 2005 Apr 29;5:44.
16 Pharmacokinetic, biochemical and clinical effects of dimethyltriazenoimidazole-4-carboxamide-bischloroethylnitrosourea combination therapy in patients with advanced breast cancer. Int J Cancer. 2003 Feb 20;103(5):686-92. doi: 10.1002/ijc.10849.
17 Increased expression of the MGMT repair protein mediated by cysteine prodrugs and chemopreventative natural products in human lymphocytes and tumor cell lines. Carcinogenesis. 2007 Feb;28(2):378-89.
18 Tea polyphenol (-)-epigallocatechin-3-gallate inhibits DNA methyltransferase and reactivates methylation-silenced genes in cancer cell lines. Cancer Res. 2003 Nov 15;63(22):7563-70.
19 Curcumin suppresses growth and chemoresistance of human glioblastoma cells via AP-1 and NFkappaB transcription factors. J Neurochem. 2007 Jul;102(2):522-38. doi: 10.1111/j.1471-4159.2007.04633.x.
20 Inactivation of O(6)-alkylguanine-DNA alkyltransferase by folate esters of O(6)-benzyl-2'-deoxyguanosine and of O(6)-[4-(hydroxymethyl)benzyl]guanine. J Med Chem. 2007 Oct 18;50(21):5193-201. doi: 10.1021/jm0705859. Epub 2007 Sep 20.
21 1,2-Bis(methylsulfonyl)-1-(2-chloroethyl)-2-[(methylamino)carbonyl]hydrazine (VNP40101M): I. Direct inhibition of O6-alkylguanine-DNA alkyltransferase (AGT) by electrophilic species generated by decomposition. Cancer Chemother Pharmacol. 2004 Apr;53(4):279-87. doi: 10.1007/s00280-003-0740-7. Epub 2003 Dec 24.
22 Promoter hypermethylation and inactivation of O(6)-methylguanine-DNA methyltransferase in esophageal squamous cell carcinomas and its reactivation in cell lines. Int J Oncol. 2005 Mar;26(3):615-22.
23 O6-alkylguanine-DNA alkyltransferase: low pKa and high reactivity of cysteine 145. Biochemistry. 2003 Sep 23;42(37):10965-70. doi: 10.1021/bi034937z.
24 Disulfiram is a direct and potent inhibitor of human O6-methylguanine-DNA methyltransferase (MGMT) in brain tumor cells and mouse brain and markedly increases the alkylating DNA damage. Carcinogenesis. 2014 Mar;35(3):692-702. doi: 10.1093/carcin/bgt366. Epub 2013 Nov 5.
25 Transcriptional signature of human macrophages exposed to the environmental contaminant benzo(a)pyrene. Toxicol Sci. 2010 Apr;114(2):247-59.
26 Bromodomain-containing protein 4 (BRD4) regulates RNA polymerase II serine 2 phosphorylation in human CD4+ T cells. J Biol Chem. 2012 Dec 14;287(51):43137-55.
27 O6-(4-bromothenyl)guanine reverses temozolomide resistance in human breast tumour MCF-7 cells and xenografts. Br J Cancer. 2005 Nov 14;93(10):1152-6. doi: 10.1038/sj.bjc.6602833.
28 Thymoquinone induces apoptosis in temozolomide-resistant glioblastoma cells via the p38 mitogen-activated protein kinase signaling pathway. Environ Toxicol. 2023 Jan;38(1):90-100. doi: 10.1002/tox.23664. Epub 2022 Sep 29.
29 DNA methylome-wide alterations associated with estrogen receptor-dependent effects of bisphenols in breast cancer. Clin Epigenetics. 2019 Oct 10;11(1):138. doi: 10.1186/s13148-019-0725-y.
30 Transcriptional profiling of lactic acid treated reconstructed human epidermis reveals pathways underlying stinging and itch. Toxicol In Vitro. 2019 Jun;57:164-173.
31 Induction of DNA damage by deguelin is mediated through reducing DNA repair genes in human non-small cell lung cancer NCI-H460 cells. Oncol Rep. 2012 Apr;27(4):959-64. doi: 10.3892/or.2012.1622. Epub 2012 Jan 4.
32 Gallic acid provokes DNA damage and suppresses DNA repair gene expression in human prostate cancer PC-3 cells. Environ Toxicol. 2013 Oct;28(10):579-87. doi: 10.1002/tox.20752. Epub 2011 Sep 2.
33 Differential response of Mono Mac 6, BEAS-2B, and Jurkat cells to indoor dust. Environ Health Perspect. 2007 Sep;115(9):1325-32.
34 Global and MGMT promoter hypomethylation independently associated with genomic instability of lymphocytes in subjects exposed to high-dose polycyclic aromatic hydrocarbon. Arch Toxicol. 2013 Nov;87(11):2013-2022. doi: 10.1007/s00204-013-1046-0. Epub 2013 Mar 30.
35 1,2-Bis(methylsulfonyl)-1-(2-chloroethyl)-2-[(methylamino)carbonyl]hydrazine (VNP40101M): II. Role of O6-alkylguanine-DNA alkyltransferase in cytotoxicity. Cancer Chemother Pharmacol. 2004 Apr;53(4):288-95. doi: 10.1007/s00280-003-0739-0. Epub 2003 Dec 17.
36 Role of DNA hypomethylation in the development of the resistance to doxorubicin in human MCF-7 breast adenocarcinoma cells. Cancer Lett. 2006 Jan 8;231(1):87-93. doi: 10.1016/j.canlet.2005.01.038.
37 Tumor necrosis factor-alpha-induced protein 3 as a putative regulator of nuclear factor-kappaB-mediated resistance to O6-alkylating agents in human glioblastomas. J Clin Oncol. 2006 Jan 10;24(2):274-87. doi: 10.1200/JCO.2005.02.9405. Epub 2005 Dec 19.
38 O(6)-methylguanine DNA-methyltransferase (MGMT) overexpression in melanoma cells induces resistance to nitrosoureas and temozolomide but sensitizes to mitomycin C. Toxicol Appl Pharmacol. 2006 Mar 1;211(2):97-105. doi: 10.1016/j.taap.2005.06.009. Epub 2005 Jul 22.
39 MGMT genotype modulates the associations between cigarette smoking, dietary antioxidants and breast cancer risk. Carcinogenesis. 2005 Dec;26(12):2131-7. doi: 10.1093/carcin/bgi179. Epub 2005 Jul 13.
40 Cytotoxicity, DNA damage, and apoptosis induced by new fotemustine analogs on human melanoma cells in relation to O6-methylguanine DNA-methyltransferase expression. J Pharmacol Exp Ther. 2003 Nov;307(2):816-23. doi: 10.1124/jpet.103.051938. Epub 2003 Sep 11.
41 Human osteosarcoma xenografts and their sensitivity to chemotherapy. Pathol Oncol Res. 2004;10(3):133-41. doi: 10.1007/BF03033741. Epub 2004 Sep 25.
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43 Role of MGMT in protecting against cyclophosphamide-induced toxicity in cells and animals. DNA Repair (Amst). 2007 Aug 1;6(8):1145-54. doi: 10.1016/j.dnarep.2007.03.010. Epub 2007 May 7.