DNA polymerase eta

DNA polymerase eta (Pol η), is a protein that in humans is encoded by the POLH gene.

POLH
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2I5O, 4RNM, 4J9O, 4YQW, 4YR0, 4ECX, 4ECS, 4ECT, 2LSK, 4DL5, 4ECR, 4DL3, 4J9K, 3MR5, 4J9N, 3SI8, 4YP3, 4O3N, 5EWE, 4ECU, 4DL6, 3MR6, 4RNN, 3MR3, 4ECY, 4O3P, 4RNO, 4ECQ, 4O3O, 4O3S, 4ECV, 4J9P, 4Q8F, 4ED3, 4ECZ, 4DL2, 4ECW, 3WUP, 5EWF, 4ED7, 4YR2, 4EEY, 4ED8, 4J9S, 3JAA, 4J9M, 4J9Q, 3MR2, 3TQ1, 4ED6, 4DL7, 4J9R, 4ED0, 4YR3, 4O3Q, 4ED1, 4J9L, 4DL4, 4O3R, 4RU9, 5EWG, 4ED2, 4Q8E, 5KG6, 5DGB, 5KFT, 5DG8, 5KFV, 5KFH, 5KG7, 5KG0, 5KFN, 5KFZ, 5KG1, 5KFX, 5KFC, 5KFU, 5KFA, 5KFK, 5KFI, 5KG4, 5KFQ, 5KFO, 5KFE, 5KFD, 5KFG, 5KG2, 5KFR, 5KFP, 5KG3, 5KFM, 5KFW, 5DGA, 5KFB, 5DG7, 5KFF, 5KFJ, 5DG9, 5L9X, 5KG5, 5KFS, 5KFL, 5KFY
Identifiers
Aliases	POLH, RAD30, RAD30A, XP-V, XPV, DNA polymerase eta, polymerase (DNA) eta
External IDs	OMIM: 603968; MGI: 1891457; HomoloGene: 38189; GeneCards: POLH; OMA:POLH - orthologs
Gene location (Human) Chr. Chromosome 6 (human) Band 6p21.1 Start 43,576,185 bp End 43,620,523 bp
Gene location (Mouse) Chr. Chromosome 17 (mouse) Band 17|17 C Start 46,482,281 bp End 46,513,571 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in buccal mucosa cell Skeletal muscle tissue of rectus abdominis stromal cell of endometrium trabecular bone lower lobe of lung epithelium of colon nipple tonsil tail of epididymis ventricular zone Top expressed in endothelial cell of lymphatic vessel spermatocyte Paneth cell cumulus cell body of femur lumbar spinal ganglion fossa mesenteric lymph nodes human fetus seminal vesicula More reference expression data BioGPS More reference expression data
Gene ontology Molecular function transferase activity DNA binding nucleotidyltransferase activity metal ion binding damaged DNA binding protein binding DNA-directed DNA polymerase activity Cellular component nucleoplasm nucleus cytosol replication fork site of double-strand break Biological process DNA synthesis involved in DNA repair pyrimidine dimer repair DNA biosynthetic process postreplication repair error-free translesion synthesis regulation of DNA repair cellular response to DNA damage stimulus DNA replication cellular response to UV-C translesion synthesis response to UV-C DNA repair response to radiation error-prone translesion synthesis Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 5429 80905 Ensembl ENSG00000170734 ENSMUSG00000023953 UniProt Q9Y253 Q9JJN0 RefSeq (mRNA) NM_001291969 NM_001291970 NM_006502 NM_030715 NM_001364947 RefSeq (protein) NP_001278898 NP_001278899 NP_006493 NP_109640 NP_001351876 Location (UCSC) Chr 6: 43.58 – 43.62 Mb Chr 17: 46.48 – 46.51 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

DNA polymerase eta is a eukaryotic DNA polymerase involved in the DNA repair by translesion synthesis. The gene encoding DNA polymerase eta is POLH, also known as XPV, because loss of this gene results in the disease xeroderma pigmentosum. Polymerase eta is particularly important for allowing accurate translesion synthesis of DNA damage resulting from ultraviolet radiation or UV.

Function

This gene encodes a member of the Y family of specialized DNA polymerases. It copies undamaged DNA with a lower fidelity than other DNA-directed polymerases. However, it accurately replicates UV-damaged DNA; when thymine dimers are present, this polymerase inserts the complementary nucleotides in the newly synthesized DNA, thereby bypassing the lesion and suppressing the mutagenic effect of UV-induced DNA damage. This polymerase is thought to be involved in hypermutation during immunoglobulin class switch recombination.

Bypass of 8-oxoguanine

During DNA replication of the Saccharomyces cerevisiae chromosome, the oxidative DNA damage 8-oxoguanine triggers a switch to translesion synthesis by DNA polymerase eta. This polymerase replicates 8-oxoguanine with an accuracy (insertion of a cytosine opposite the 8-oxoguanine) of approximately 94%. Replication of 8-oxoguanine in the absence of DNA polymerase eta is less than 40%.

Clinical significance

Mutations in this gene result in XPV, a variant type of xeroderma pigmentosum, characterized by sun sensitivity, elevated incidence of skin cancer, and at the cellular level, by delayed replication and hypermutability after UV-irradiation

Interactions

POLH has been shown to interact with PCNA.

Further reading

• Plachta M, Halas, McIntyre J, Sledziewska-Gojska E (2015). "The steady-state level and stability of TLS polymerase eta are cellcycle dependent in the yeast S. cerevisiae". DNA Repair. 29: 147–153. doi:10.1016/j.dnarep.2015.02.015. PMID 25766643.
• Skoneczna A, McIn Atyre J, Skoneczny M, Policinska Z, Sledziewska-Gojska E (2007). "Polymerase eta is a short-lived, proteasomally degraded protein that is temporarily stabilized following UV irradiation in Saccharomyces cerevisiae". J. Mol. Biol. 366 (4): 1074–86. doi:10.1016/j.jmb.2006.11.093. PMID 17198712.
• Masutani C, Kusumoto R, Yamada A, Dohmae N, Yokoi M, Yuasa M, Araki M, Iwai S, Takio K, Hanaoka F (1999). "The XPV (xeroderma pigmentosum variant) gene encodes human DNA polymerase eta". Nature. 399 (6737): 700–4. Bibcode:1999Natur.399..700M. doi:10.1038/21447. PMID 10385124. S2CID 4429698.
• Johnson RE, Kondratick CM, Prakash S, Prakash L (1999). "hRAD30 mutations in the variant form of xeroderma pigmentosum". Science. 285 (5425): 263–5. doi:10.1126/science.285.5425.263. PMID 10398605.
• Masutani C, Kusumoto R, Iwai S, Hanaoka F (2000). "Mechanisms of accurate translesion synthesis by human DNA polymerase eta". EMBO J. 19 (12): 3100–9. doi:10.1093/emboj/19.12.3100. PMC 203367. PMID 10856253.
• Yamada A, Masutani C, Iwai S, Hanaoka F (2000). "Complementation of defective translesion synthesis and UV light sensitivity in xeroderma pigmentosum variant cells by human and mouse DNA polymerase eta". Nucleic Acids Res. 28 (13): 2473–80. doi:10.1093/nar/28.13.2473. PMC 102698. PMID 10871396.
• Yuasa M, Masutani C, Eki T, Hanaoka F (2000). "Genomic structure, chromosomal localization and identification of mutations in the xeroderma pigmentosum variant (XPV) gene". Oncogene. 19 (41): 4721–8. doi:10.1038/sj.onc.1203842. PMID 11032022.
• Itoh T, Linn S, Kamide R, Tokushige H, Katori N, Hosaka Y, Yamaizumi M (2000). "Xeroderma pigmentosum variant heterozygotes show reduced levels of recovery of replicative DNA synthesis in the presence of caffeine after ultraviolet irradiation". J. Invest. Dermatol. 115 (6): 981–5. doi:10.1046/j.1523-1747.2000.00154.x. PMID 11121129.
• Zeng X, Winter DB, Kasmer C, Kraemer KH, Lehmann AR, Gearhart PJ (2001). "DNA polymerase eta is an A-T mutator in somatic hypermutation of immunoglobulin variable genes". Nat. Immunol. 2 (6): 537–41. doi:10.1038/88740. PMID 11376341. S2CID 6213513.
• Matsuda T, Bebenek K, Masutani C, Rogozin IB, Hanaoka F, Kunkel TA (2001). "Error rate and specificity of human and murine DNA polymerase eta". J. Mol. Biol. 312 (2): 335–46. doi:10.1006/jmbi.2001.4937. PMID 11554790.
• Haracska L, Johnson RE, Unk I, Phillips B, Hurwitz J, Prakash L, Prakash S (2001). "Physical and functional interactions of human DNA polymerase eta with PCNA". Mol. Cell. Biol. 21 (21): 7199–206. doi:10.1128/MCB.21.21.7199-7206.2001. PMC 99895. PMID 11585903.
• Glick E, Vigna KL, Loeb LA (2001). "Mutations in human DNA polymerase eta motif II alter bypass of DNA lesions". EMBO J. 20 (24): 7303–12. doi:10.1093/emboj/20.24.7303. PMC 125802. PMID 11743006.
• Limoli CL, Giedzinski E, Bonner WM, Cleaver JE (2002). "UV-induced replication arrest in the xeroderma pigmentosum variant leads to DNA double-strand breaks, gamma -H2AX formation, and Mre11 relocalization". Proc. Natl. Acad. Sci. U.S.A. 99 (1): 233–8. Bibcode:2002PNAS...99..233L. doi:10.1073/pnas.231611798. PMC 117544. PMID 11756691.
• Broughton BC, Cordonnier A, Kleijer WJ, Jaspers NG, Fawcett H, Raams A, Garritsen VH, Stary A, Avril MF, Boudsocq F, Masutani C, Hanaoka F, Fuchs RP, Sarasin A, Lehmann AR (2002). "Molecular analysis of mutations in DNA polymerase eta in xeroderma pigmentosum-variant patients". Proc. Natl. Acad. Sci. U.S.A. 99 (2): 815–20. Bibcode:2002PNAS...99..815B. doi:10.1073/pnas.022473899. PMC 117388. PMID 11773631.
• Chiapperino D, Kroth H, Kramarczuk IH, Sayer JM, Masutani C, Hanaoka F, Jerina DM, Cheh AM (2002). "Preferential misincorporation of purine nucleotides by human DNA polymerase eta opposite benzo[a]pyrene 7,8-diol 9,10-epoxide deoxyguanosine adducts". J. Biol. Chem. 277 (14): 11765–71. doi:10.1074/jbc.M112139200. PMID 11821420.
• Kusumoto R, Masutani C, Iwai S, Hanaoka F (2002). "Translesion synthesis by human DNA polymerase eta across thymine glycol lesions". Biochemistry. 41 (19): 6090–9. doi:10.1021/bi025549k. PMID 11994004.
• Yavuz S, Yavuz AS, Kraemer KH, Lipsky PE (2002). "The role of polymerase eta in somatic hypermutation determined by analysis of mutations in a patient with xeroderma pigmentosum variant". J. Immunol. 169 (7): 3825–30. doi:10.4049/jimmunol.169.7.3825. PMID 12244178.
• Kannouche P, Fernández de Henestrosa AR, Coull B, Vidal AE, Gray C, Zicha D, Woodgate R, Lehmann AR (2002). "Localization of DNA polymerases eta and iota to the replication machinery is tightly co-ordinated in human cells". EMBO J. 21 (22): 6246–56. doi:10.1093/emboj/cdf618. PMC 137208. PMID 12426396.
• Zheng H, Wang X, Warren AJ, Legerski RJ, Nairn RS, Hamilton JW, Li L (2003). "Nucleotide excision repair- and polymerase eta-mediated error-prone removal of mitomycin C interstrand cross-links". Mol. Cell. Biol. 23 (2): 754–61. doi:10.1128/MCB.23.2.754-761.2003. PMC 151552. PMID 12509472.
• Yang IY, Miller H, Wang Z, Frank EG, Ohmori H, Hanaoka F, Moriya M (2003). "Mammalian translesion DNA synthesis across an acrolein-derived deoxyguanosine adduct. Participation of DNA polymerase eta in error-prone synthesis in human cells". J. Biol. Chem. 278 (16): 13989–94. doi:10.1074/jbc.M212535200. PMID 12584190.
• Kannouche P, Fernández de Henestrosa AR, Coull B, Vidal AE, Gray C, Zicha D, Woodgate R, Lehmann AR (2003). "Localization of DNA polymerases eta and iota to the replication machinery is tightly co-ordinated in human cells". EMBO J. 22 (5): 1223–33. doi:10.1093/emboj/cdf618. PMC 150329. PMID 12606586.

External links

• GeneReviews/NIH/NCBI/UW entry on Xeroderma Pigmentosum

This article incorporates text from the United States National Library of Medicine, which is in the public domain.