Title: LEDGF/p75-independent HIV-1 replication demonstrates a role for HRP-2 and remains sensitive to inhibition by LEDGINs
Authors: Schrijvers, Rik
De Rijck, Jan
Demeulemeester, Jonas
Adachi, Noritaka
Vets, Sofie
Ronen, Keshet
Christ, Frauke
Bushman, Frederic D
Debyser, Zeger
Gijsbers, Rik # ×
Issue Date: 1-Mar-2012
Publisher: Public Library of Science
Series Title: PLoS Pathogens vol:8 issue:3 pages:e1002558
Abstract: Lens epithelium-derived growth factor (LEDGF/p75) is a cellular cofactor of HIV-1 integrase (IN) that interacts with IN through its IN binding domain (IBD) and tethers the viral pre-integration complex to the host cell chromatin. Here we report the generation of a human somatic LEDGF/p75 knockout cell line that allows the study of spreading HIV-1 infection in the absence of LEDGF/p75. By homologous recombination the exons encoding the LEDGF/p75 IBD (exons 11 to 14) were knocked out. In the absence of LEDGF/p75 replication of laboratory HIV-1 strains was severely delayed while clinical HIV-1 isolates were replication-defective. The residual replication was predominantly mediated by the Hepatoma-derived growth factor related protein 2 (HRP-2), the only cellular protein besides LEDGF/p75 that contains an IBD. Importantly, the recently described IN-LEDGF/p75 inhibitors (LEDGINs) remained active even in the absence of LEDGF/p75 by blocking the interaction with the IBD of HRP-2. These results further support the potential of LEDGINs as allosteric integrase inhibitors.
ISSN: 1553-7366
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Virology and Gene Therapy
× corresponding author
# (joint) last author

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