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Dynamical Transition of Collective Motions in Dry Proteins



Zhuo Liu, Juan Huang, Madhu Sudan Tyagi, Hugh O'Neill, Qiu Zhang, Eugene Mamontov, NItin Jain, Yujie Wang, Jie Zhang, Jeremy C. Smith, Liang Hong


Water is widely assumed to be essential for protein dynamics and function. In particular, the well-documented "dynamical" transition at 200 K detected in hydrogenated proteins by incoherent neutron scattering, at which the protein changes from a rigid, non-functional form to a flexible, functional state, requires hydration. Here, we report on coherent neutron scattering experiments on perdeuterated proteins and reveal that a transition occurs in dry proteins at the same temperature resulting primarily from the thermal activation of collective heavy-atom motions. The dynamical transition discovered is intrinsic to the energy landscape of dry proteins.
Physical Review Letters


Dynamical transition, protein, neutron scattering


Liu, Z. , Huang, J. , Tyagi, M. , O'Neill, H. , Zhang, Q. , Mamontov, E. , Jain, N. , Wang, Y. , Zhang, J. , Smith, J. and Hong, L. (2017), Dynamical Transition of Collective Motions in Dry Proteins, Physical Review Letters, [online], (Accessed July 20, 2024)


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Created July 27, 2017, Updated October 12, 2021