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Basic Characteristics of Mutations
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Mutation Site
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F47R |
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Mutation Site Sentence
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To address this gap, a well-defined dominant negative HPV 16 E6 mutant (HPV16 E6 F47R) was expressed exogenously in HeLa cells. |
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Mutation Level
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Amino acid level |
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Mutation Type
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Nonsynonymous substitution |
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Gene/Protein/Region
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E6 |
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Standardized Encoding Gene
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E6
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Genotype/Subtype
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HPV16 |
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Viral Reference
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-
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Functional Impact and Mechanisms
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Disease
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Uterine Cervical Neoplasms
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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- |
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Treatment
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- |
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Location
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- |
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Literature Information
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PMID
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33374731
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Title
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High Risk alpha-HPV E6 Impairs Translesion Synthesis by Blocking POLeta Induction
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Author
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Wendel SO,Snow JA,Bastian T,Brown L,Hernandez C,Burghardt E,Kahn A,Murthy V,Neill D,Smith ZC,Ault K,Tawfik O,Wu C,Wallace NA
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Journal
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Cancers
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Journal Info
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2020 Dec 23;13(1):28
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Abstract
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High risk genus alpha human papillomaviruses (alpha-HPVs) express two versatile oncogenes (alpha-HPV E6 and E7) that cause cervical cancer (CaCx) by degrading tumor suppressor proteins (p53 and RB). alpha-HPV E7 also promotes replication stress and alters DNA damage responses (DDR). The translesion synthesis pathway (TLS) mitigates DNA damage by preventing replication stress from causing replication fork collapse. Computational analysis of gene expression in CaCx transcriptomic datasets identified a frequent increased expression of TLS genes. However, the essential TLS polymerases did not follow this pattern. These data were confirmed with in vitro and ex vivo systems. Further interrogation of TLS, using POLeta as a representative TLS polymerase, demonstrated that alpha-HPV16 E6 blocks TLS polymerase induction by degrading p53. This doomed the pathway, leading to increased replication fork collapse and sensitivity to treatments that cause replication stress (e.g., UV and Cisplatin). This sensitivity could be overcome by the addition of exogenous POLeta.
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Sequence Data
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-
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