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Identification of Host Proteins Required for HIV Infection Through a Functional Genomic Screen
Abraham L. Brass,1,2Derek M. Dykxhoorn,3*Yair Benita,4*Nan Yan,3Alan Engelman,5Ramnik J. Xavier,2,4Judy Lieberman,3Stephen J. Elledge1
HIV-1 exploits multiple host proteins during infection. We performeda large-scale small interfering RNA screen to identify hostfactors required by HIV-1 and identified more than 250 HIV-dependencyfactors (HDFs). These proteins participate in a broad arrayof cellular functions and implicate new pathways in the virallife cycle. Further analysis revealed previously unknown rolesfor retrograde Golgi transport proteins (Rab6 and Vps53) inviral entry, a karyopherin (TNPO3) in viral integration, andthe Mediator complex (Med28) in viral transcription. Transcriptionalanalysis revealed that HDF genes were enriched for high expressionin immune cells, suggesting that viruses evolve in host cellsthat optimally perform the functions required for their lifecycle. This effort illustrates the power with which RNA interferenceand forward genetics can be used to expose the dependenciesof human pathogens such as HIV, and in so doing identify potentialtargets for therapy.
1 Department of Genetics, Center for Genetics and Genomics, Brigham and Women's Hospital, Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115, USA. 2 Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA. 3 Immune Disease Institute and Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA. 4 Center for Computational and Integrative Biology, Harvard Medical School, Boston, MA 02114, USA. 5 Dana-Farber Cancer Institute, Division of AIDS, Harvard Medical School, Boston, MA 02115, USA.
* These authors contributed equally to this work.
To whom correspondence should be addressed. E-mail: selledge{at}genetics.med.harvard.edu
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