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• W2049346353 startingPage "1891" @default.
• W2049346353 abstract "The diastereomers of dibromo-7-epi-10-deacetylcephalomannine (6 and 7) have been isolated and characterized. Cytotoxicity and microtubule assembly assays demonstrate that cephalomannine analogue 6 possesses a potency profile very similar to that of Taxol, while isomer 7 is slightly less active. Solid state, solution, and tubulin-bound conformations of the two diastereomers were probed by using X-ray crystallography, 2-D NMR experiments in conjunction with the NAMFIS analysis, and the Glide docking protocol. In the crystal, isomer 7 exhibits an intermolecular halogen bond that may contribute to self-assembly. Neither crystal structure appears in the NAMFIS solution analysis, but both diastereomers are represented in solution by a T-shaped Taxol conformer. Glide docking demonstrates the latter to best fill the tubulin binding pocket, as has been shown for the parent Taxol drug. Each model of the bound complexes for 6 and 7 presents a single well-defined halogen bond from one of the ligand's bromines to Glu22 or Asp26 near the N-terminus of β-tubulin, respectively. This first report of a halogen bond between taxanes and tubulin may prove useful in guiding the design and synthesis of other microtubule-stabilizing agents with a similar capacity." @default.
• W2049346353 created "2016-06-24" @default.
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• W2049346353 date "2006-02-16" @default.
• W2049346353 modified "2023-09-30" @default.
• W2049346353 title "Diastereomers of Dibromo-7-<i>e</i><i>pi</i>-10-deacetylcephalomannine: Crowded and Cytotoxic Taxanes Exhibit Halogen Bonds" @default.
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• W2049346353 doi "https://doi.org/10.1021/jm0509243" @default.
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