Subtomogram averaging for biophysical analysis and supramolecular context.

Subtomogram averaging for biophysical analysis and supramolecular context.
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DOI:
10.1016/j.yjsbx.2022.100076
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发表时间:
2022
影响因子:
2.9
通讯作者:
Jensen, Grant J.
Jensen, Grant J.
中科院分区:
其他
文献类型:
--
作者:
Metskas, Lauren Ann;Wilfong, Rosalie;Jensen, Grant J.

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Subtomogram averaging provides position and orientation of particles. Data processing choices affect usability of data for biophysical analyses. An optimized (context-focused) pipeline preserves biophysical data. Context-focused processing still allows high-resolution averaging. Recent advances in hardware, software and computing power have led to increasingly ambitious applications of cryo-electron tomography and subtomogram averaging. It is now possible to reveal both structures and biophysical relationships like protein binding partners and small molecule occupancy in these experiments. However, some data processing choices require the user to prioritize structure or biophysical context. Here, we present a modified subtomogram averaging approach that preserves both capabilities. By increasing the accuracy of particle-picking, performing alignment and averaging on all subtomograms, and decreasing reliance on symmetry and tight masks, the usability of tomography and subtomogram averaging data for biophysical analyses is greatly increased without negatively impacting structural refinements.
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