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Merck
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  • An optimized protocol for in vitro and in cellulo structural determination of the multi-tRNA synthetase complex by cross-linking mass spectrometry.

An optimized protocol for in vitro and in cellulo structural determination of the multi-tRNA synthetase complex by cross-linking mass spectrometry.

STAR protocols (2022-03-15)
Krishnendu Khan, Camelia Baleanu-Gogonea, Belinda Willard, Valentin Gogonea, Paul L Fox
摘要

Despite recent advances in structural determination of individual proteins, elucidating the 3-dimensional architecture of large, multiprotein complexes remains challenging, partly because of issues related to structural integrity during purification. Here, we describe a protocol to determine the 3-dimensional architecture of the 11-constituent, multi-tRNA synthetase complex (MSC) using chemical cross-linking coupled with mass-spectrometry (XL-MS). The protocol does not require purification and is broadly applicable, facilitating determination of native structures in cell lysates and in non-disrupted cells as well as in purified complexes. For complete details on the use and execution of this protocol, please refer to Khan et al. (2020).

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Sigma-Aldrich
乙二胺四乙酸 四钠盐 二水合物, BioReagent, suitable for cell culture, 98.5-102.0%