Abstract
HIV DNA integration is favored in active genes, but the underlying mechanism is unclear. Cellular lens epithelium-derived growth factor (LEDGF/p75) binds both chromosomal DNA and HIV integrase, and might therefore direct integration by a tethering interaction. We analyzed HIV integration in cells depleted for LEDGF/p75, and found that integration was (i) less frequent in transcription units, (ii) less frequent in genes regulated by LEDGF/p75 and (iii) more frequent in GC-rich DNA. LEDGF is thus the first example of a cellular protein controlling the location of HIV integration in human cells.
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Acknowledgements
We thank P. Bates, C. Berry, R. Doms, S. Hannenhalli and members of the Bushman, Ecker and Poeschla laboratories for discussions and M. Vanegas for help with the LEDGF/p75 knockdown cell lines. This work was supported by US National Institutes of Health grants AI52845 and AI34786, the J.B. Pendleton Charitable Trust, and R. and F. Withington (to F.B.) and the F.B. Burns Foundation (to J.R.E.) and AI47536 (to E.P.). A.C. was supported in part by a fellowship from the Swiss National Science Foundation.
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Ciuffi, A., Llano, M., Poeschla, E. et al. A role for LEDGF/p75 in targeting HIV DNA integration. Nat Med 11, 1287–1289 (2005). https://doi.org/10.1038/nm1329
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DOI: https://doi.org/10.1038/nm1329
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