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- Title
The Base Excision Repair Pathway Is Required for Efficient Lentivirus Integration.
- Authors
Yoder, Kristine E.; Espeseth, Amy; Xiao-hong Wang; Qingming Fang; Russo, Maria Teresa; Lloyd, R. Stephen; Hazuda, Daria; Sobol, Robert W.; Fishel, Richard
- Abstract
An siRNA screen has identified several proteins throughout the base excision repair (BER) pathway of oxidative DNA damage as important for efficient HIV infection. The proteins identified included early repair factors such as the base damage recognition glycosylases OGG1 and MYH and the late repair factor POLβ, implicating the entire BER pathway. Murine cells with deletions of the genes Ogg1, Myh, Neil1 and Polβ recapitulate the defect of HIV infection in the absence of BER. Defective infection in the absence of BER proteins was also seen with the lentivirus FIV, but not the gammaretrovirus MMLV. BER proteins do not affect HIV infection through its accessory genes nor the central polypurine tract. HIV reverse transcription and nuclear entry appear unaffected by the absence of BER proteins. However, HIV integration to the host chromosome is reduced in the absence of BER proteins. Pre-integration complexes from BER deficient cell lines show reduced integration activity in vitro. Integration activity is restored by addition of recombinant BER protein POLβ. Lentiviral infection and integration efficiency appears to depend on the presence of BER proteins.
- Subjects
DNA damage; HIV infections; INFECTION; GENETIC transcription; CELL lines; GENES; BIOMOLECULES
- Publication
PLoS ONE, 2011, Vol 6, Issue 3, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0017862