期刊
SCIENCE
卷 339, 期 6119, 页码 587-590出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1230582
关键词
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资金
- European Molecular Biology Organization
- Genesis Oncology Trust
- Ministerio de Economia y Competitividad [BIO2010-16351]
- Comunidad Autonoma de Madrid [S2010/BMD-2457]
- Roche Research Foundation
- Swiss National Science Foundation [310030B_138659]
- Swiss SystemsX.ch initiative [BIP-2011/122]
Microtubule-stabilizing agents (MSAs) are efficacious chemotherapeutic drugs widely used for the treatment of cancer. Despite the importance of MSAs for medical applications and basic research, their molecular mechanisms of action on tubulin and microtubules remain elusive. We determined high-resolution crystal structures of ab-tubulin in complex with two unrelated MSAs, zampanolide and epothilone A. Both compounds were bound to the taxane pocket of beta-tubulin and used their respective side chains to induce structuring of the M-loop into a short helix. Because the M-loop establishes lateral tubulin contacts in microtubules, these findings explain how taxane-site MSAs promote microtubule assembly and stability. Further, our results offer fundamental structural insights into the control mechanisms of microtubule dynamics.
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