Dynamic Instability from Non-equilibrium Structural Transitions on the Energy Landscape of Microtubule.
Dynamic Instability from Non-equilibrium Structural Transitions on the Energy Landscape of Microtubule.
复制标题
从微管的能量景观上的非平衡结构过渡的动态不稳定性。
DOI:
10.1016/j.cels.2020.09.008
复制
发表时间:
2020-12-16
期刊:
影响因子:
9.3
通讯作者:
Ma A
中科院分区:
文献类型:
--
作者:
Stewman SF;Tsui KK;Ma A
Microtubules are the backbone of the cytoskeleton and vital to numerous cellular processes. The central dogma of microtubules is that all their functions are driven by dynamic instability, but its mechanism has remained unresolved for over thirty years due to conceptual difficulties inherent in the dominant GTP-cap framework. We present a physically rigorous structural mechano-chemical model: dynamic instability is driven by non-equilibrium transitions between the bent (B), straight (S) and curved (C) forms of tubulin monomers and longitudinal interfaces in the two-dimensional lattice of microtubule. All the different phenomena (growth, shortening, catastrophe, rescue and pausing) are controlled by the kinetic pathways for B↔S↔C transitions and corresponding energy landscapes. Different kinetics at minus-end are due to different B↔S↔C pathways imposed by the polarity of microtubule lattice. This model enables us to reproduce all the observed phenomena of dynamic instability of purified tubulins in kinetic simulations. We present a structural mechano-chemical model that explains all the phenomena of dynamic instability of microtubules, including growth, shortening, catastrophe, rescue and pausing at both plus- and minus-ends. This model is based on the hypothesis that all these phenomena are driven by bent-to-straight-to-curved conformational changes of tubulins monomers and interfaces.
登录
查看更多内容
影响因子:
4
作者:
Bowne-Anderson, Hugo;Zanic, Marija;Kauer, Monika;Howard, Jonathon
通讯作者:
Howard, Jonathon
影响因子:
56.9
作者:
Boehr, David D.;McElheny, Dan;Wright, Peter E.
通讯作者:
Wright, Peter E.
影响因子:
56.9
作者:
FRAUENFELDER, H;SLIGAR, SG;WOLYNES, PG
通讯作者:
WOLYNES, PG
影响因子:
64.5
作者:
Alushin GM;Lander GC;Kellogg EH;Zhang R;Baker D;Nogales E
通讯作者:
Nogales E
影响因子:
8.6
作者:
FLYVBJERG, H;HOLY, TE;LEIBLER, S
通讯作者:
LEIBLER, S