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Figure 5 | Retrovirology

Figure 5

From: The mechanism of H171T resistance reveals the importance of Nδ-protonated His171 for the binding of allosteric inhibitor BI-D to HIV-1 integrase

Figure 5

Crystal structures of BI-D bound to WT and H171T CCD dimers. Panel A is the H171T CCD dimer and panel B is the WT CCD dimer. BI-D is colored green and individual IN subunits are colored yellow and cyan. Oxygen atoms are shown in red and nitrogen atoms are in blue. Black dash-lines indicate hydrogen bonding interactions, whereas the magenta dash-line shows the electrostatic interaction between the protonated Nδ- on His171 and the carboxylic acid of BI-D. The arrow indicates the hydrogen bond between the protonated Nδ- on His171 and the ether oxygen on the tert-butoxy (B), which is absent in the H171T IN CCD structure (A).

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