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Título

Crystal structure of tert -butyldimethylsilyl-spiroaminooxathioledioxide- thymine (TSAO-T) in complex with HIV-1 reverse transcriptase (RT) redefines the elastic limits of the non-nucleoside inhibitor-binding pocket

AutorDas, Krishna; Bauman, J. D.; Rim, A. S.; Dharia, C.; Clark, A. D.; Camarasa Rius, María José ; Balzarini, Jan; Arnold, E.
Fecha de publicación2011
EditorAmerican Chemical Society
CitaciónJournal of Medicinal Chemistry 54: 2727-2737 (2011)
Resumentert-Butyldimethylsilyl-spiroaminooxathioledioxide (TSAO) compounds have an embedded thymidine-analogue backbone; however, TSAO compounds invoke non-nucleoside RT inhibitor (NNRTI) resistance mutations. Our crystal structure of RT:7 (TSAO-T) complex shows that 7 binds inside the NNRTI-binding pocket, assuming a >dragon> shape, and interacts extensively with almost all the pocket residues. The structure also explains the structure-activity relationships and resistance data for TSAO compounds. The binding of 7 causes hyper-expansion of the pocket and significant rearrangement of RT subdomains. This nonoptimal complex formation is apparently responsible (1) for the lower stability of a RT (p66/p51) dimer and (2) for the lower potency of 7 despite of its extensive interactions with RT. However, the HIV-1 RT:7 structure reveals novel design features such as (1) interactions with the conserved Tyr183 from the YMDD-motif and (2) a possible way for an NNRTI to reach the polymerase active site that may be exploited in designing new NNRTIs.
Versión del editorhttp://dx.doi.org/10.1021/jm101536x
URIhttp://hdl.handle.net/10261/123009
DOI10.1021/jm101536x
Identificadoresdoi: 10.1021/jm101536x
issn: 0022-2623
e-issn: 1520-4804
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