Thymine-DNA glycosylase

TDG
Available structures PDB Human UniProt search: PDBe RCSB List of PDB id codes 1WYW, 2D07, 2RBA, 3UFJ, 3UO7, 3UOB, 4FNC, 4JGC, 4XEG, 4Z3A, 4Z47, 4Z7B, 4Z7Z, 5CYS
Identifiers
Aliases	TDG, hThymine-DNA glycosylase, thymine DNA glycosylase
External IDs	OMIM: 601423; MGI: 3645587; HomoloGene: 2415; GeneCards: TDG; OMA:TDG - orthologs
Gene location (Human) Chr. Chromosome 12 (human) Band 12q23.3 Start 103,965,822 bp End 103,988,874 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in buccal mucosa cell visceral pleura tibia endothelial cell epithelium of nasopharynx gingival epithelium parietal pleura amniotic fluid germinal epithelium hair follicle n/a More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein homodimerization activity transcription coregulator activity damaged DNA binding protein binding double-stranded DNA binding hydrolase activity protein kinase C binding transcription factor binding DNA N-glycosylase activity mismatched DNA binding protein domain specific binding DNA binding magnesium ion binding uracil DNA N-glycosylase activity ATP binding pyrimidine-specific mismatch base pair DNA N-glycosylase activity sodium ion binding chloride ion binding SUMO binding protein self-association G/U mismatch-specific uracil-DNA glycosylase activity Cellular component PML body plasma membrane nucleoplasm nucleus Biological process regulation of transcription, DNA-templated embryo development negative regulation of chromatin binding oxidative DNA demethylation negative regulation of transcription by RNA polymerase II negative regulation of protein binding transcription, DNA-templated cellular response to DNA damage stimulus depyrimidination DNA demethylation base-excision repair DNA repair DNA mismatch repair regulation of gene expression, epigenetic base-excision repair, AP site formation regulation of DNA N-glycosylase activity chromatin organization regulation of embryonic development Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 6996 545124 Ensembl ENSG00000139372 n/a UniProt Q13569 n/a RefSeq (mRNA) NM_001008411 NM_003211 NM_001363612 XM_006521630 RefSeq (protein) NP_003202 NP_001350541 n/a Location (UCSC) Chr 12: 103.97 – 103.99 Mb n/a PubMed search
Wikidata
View/Edit Human View/Edit Mouse

G/T mismatch-specific thymine DNA glycosylase is an enzyme that in humans is encoded by the TDG gene. Several bacterial proteins have strong sequence homology with this protein.

Function

The protein encoded by this gene belongs to the TDG/mug DNA glycosylase family. Thymine-DNA glycosylase (TDG) removes thymine moieties from G/T mismatches by hydrolyzing the carbon-nitrogen bond between the sugar-phosphate backbone of DNA and the mispaired thymine. With lower activity, this enzyme also removes thymine from C/T and T/T mispairings. TDG can also remove uracil and 5-bromouracil from mispairings with guanine. TDG knockout mouse models showed no increase in mispairing frequency suggesting that other enzymes, like the functional homologue MBD4, may provide functional redundancy. This gene may have a pseudogene in the p arm of chromosome 12.

Additionally, in 2011, the human thymine DNA glycosylase (hTDG) was reported to efficiently excise 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC), the key oxidation products of 5-methylcytosine in genomic DNA. Later on, the crystal structure of the hTDG catalytic domain in complex with duplex DNA containing 5caC was published, which supports the role of TDG in mammalian 5-methylcytosine demethylation.

Interactions

Thymine-DNA glycosylase has been shown to interact with:

• CREB-binding protein,
• Estrogen receptor alpha,
• Promyelocytic leukemia protein,
• SUMO3, and
• Small ubiquitin-related modifier 1.

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles.

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|alt=Fluorouracil (5-FU) Activity edit]]

Fluorouracil (5-FU) Activity edit

Further reading

• Lindahl T (1982). "DNA repair enzymes". Annu. Rev. Biochem. 51: 61–87. doi:10.1146/annurev.bi.51.070182.000425. PMID 6287922.
• Hardeland U, Bentele M, Lettieri T, et al. (2001). Thymine DNA glycosylase. Progress in Nucleic Acid Research and Molecular Biology. Vol. 68. pp. 235–53. doi:10.1016/S0079-6603(01)68103-0. ISBN 978-0-12-540068-8. PMID 11554300. {{cite book}}: |journal= ignored (help)
• Chevray PM, Nathans D (1992). "Protein interaction cloning in yeast: identification of mammalian proteins that react with the leucine zipper of Jun". Proc. Natl. Acad. Sci. U.S.A. 89 (13): 5789–93. doi:10.1073/pnas.89.13.5789. PMC 402103. PMID 1631061.
• Neddermann P, Jiricny J (1994). "Efficient removal of uracil from G.U mispairs by the mismatch-specific thymine DNA glycosylase from HeLa cells". Proc. Natl. Acad. Sci. U.S.A. 91 (5): 1642–6. doi:10.1073/pnas.91.5.1642. PMC 43219. PMID 8127859.
• Neddermann P, Jiricny J (1993). "The purification of a mismatch-specific thymine-DNA glycosylase from HeLa cells". J. Biol. Chem. 268 (28): 21218–24. PMID 8407958.
• Barrett TE, Savva R, Panayotou G, et al. (1998). "Crystal structure of a G:T/U mismatch-specific DNA glycosylase: mismatch recognition by complementary-strand interactions". Cell. 92 (1): 117–29. doi:10.1016/S0092-8674(00)80904-6. PMID 9489705.
• Missero C, Pirro MT, Simeone S, et al. (2001). "The DNA glycosylase T:G mismatch-specific thymine DNA glycosylase represses thyroid transcription factor-1-activated transcription". J. Biol. Chem. 276 (36): 33569–75. doi:10.1074/jbc.M104963200. PMID 11438542.
• Tini M, Benecke A, Um SJ, et al. (2002). "Association of CBP/p300 acetylase and thymine DNA glycosylase links DNA repair and transcription". Mol. Cell. 9 (2): 265–77. doi:10.1016/S1097-2765(02)00453-7. PMID 11864601.
• Hardeland U, Steinacher R, Jiricny J, Schär P (2002). "Modification of the human thymine-DNA glycosylase by ubiquitin-like proteins facilitates enzymatic turnover". EMBO J. 21 (6): 1456–64. doi:10.1093/emboj/21.6.1456. PMC 125358. PMID 11889051.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Abu M, Waters TR (2003). "The main role of human thymine-DNA glycosylase is removal of thymine produced by deamination of 5-methylcytosine and not removal of ethenocytosine". J. Biol. Chem. 278 (10): 8739–44. doi:10.1074/jbc.M211084200. PMID 12493755.
• Shimizu Y, Iwai S, Hanaoka F, Sugasawa K (2003). "Xeroderma pigmentosum group C protein interacts physically and functionally with thymine DNA glycosylase". EMBO J. 22 (1): 164–73. doi:10.1093/emboj/cdg016. PMC 140069. PMID 12505994.
• Chen D, Lucey MJ, Phoenix F, et al. (2003). "T:G mismatch-specific thymine-DNA glycosylase potentiates transcription of estrogen-regulated genes through direct interaction with estrogen receptor alpha". J. Biol. Chem. 278 (40): 38586–92. doi:10.1074/jbc.M304286200. PMID 12874288.
• Lehner B, Semple JI, Brown SE, et al. (2004). "Analysis of a high-throughput yeast two-hybrid system and its use to predict the function of intracellular proteins encoded within the human MHC class III region". Genomics. 83 (1): 153–67. doi:10.1016/S0888-7543(03)00235-0. PMID 14667819.
• Brandenberger R, Wei H, Zhang S, et al. (2005). "Transcriptome characterization elucidates signaling networks that control human ES cell growth and differentiation". Nat. Biotechnol. 22 (6): 707–16. doi:10.1038/nbt971. PMID 15146197.
• Krześniak M, Butkiewicz D, Samojedny A, et al. (2005). "Polymorphisms in TDG and MGMT genes - epidemiological and functional study in lung cancer patients from Poland". Ann. Hum. Genet. 68 (Pt 4): 300–12. doi:10.1046/j.1529-8817.2004.00079.x. PMID 15225156.
• He YF, Li BZ, Li Z, Liu P, Wang Y, Tang Q, Ding J, Jia Y, Chen Z, Li L, Sun Y, Li X, Dai Q, Song CX, Zhang K, He C, Xu GL (September 2011). "Tet-mediated formation of 5-carboxylcytosine and its excision by TDG in mammalian DNA". Science. 333 (6047): 1303–7. doi:10.1126/science.1210944. PMC 3462231. PMID 21817016.
• Zhang L, Lu X, Lu J, Liang H, Dai Q, Xu GL, Luo C, Jiang H, He C (February 2012). "Thymine DNA glycosylase specifically recognizes 5-carboxylcytosine-modified DNA". Nature Chemical Biology. 8 (4): 328–30. doi:10.1038/nchembio.914. PMC 3307914. PMID 22327402.
• Xu J, Cortellino S, Tricarico R, Chang WC, Scher G, Devarajan K, Slifker M, Moore R, Bassi MR, Caretti E, Clapper M, Cooper H, Bellacosa A (September 2017). "Thymine DNA Glycosylase (TDG) is involved in the pathogenesis of intestinal tumors with reduced APC expression". Oncotarget. 8 (52): 89988–89997. doi:10.18632/oncotarget.21219. PMC 5685726. PMID 29163805.