HDX-guided EPR spectroscopy to interrogate membrane protein dynamics.

HDX-guided EPR spectroscopy to interrogate membrane protein dynamics.
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DOI:
10.1016/j.xpro.2022.101562
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发表时间:
2022-09-16
期刊:
影响因子:
--
通讯作者:
Pliotas, Christos
Pliotas, Christos
中科院分区:
其他
文献类型:
--
作者:
Lane, Benjamin J.;Wang, Bolin;Ma, Yue;Calabrese, Antonio N.;El Mkami, Hassane;Pliotas, Christos

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Solvent accessibilities of and distances between protein residues measured by pulsed-EPR approaches provide high-resolution information on dynamic protein motions. We describe protocols for the purification and site-directed spin labeling of integral membrane proteins. In our protocol, peptide-level HDX-MS is used as a precursor to guide single-residue resolution ESEEM accessibility measurements and spin labeling strategies for EPR applications. Exploiting the pentameric MscL channel as a model, we discuss the use of cwEPR, DEER/PELDOR, and ESEEM spectroscopies to interrogate membrane protein dynamics. For complete details on the use and execution of this protocol, please refer to. Protocols for an integrated EPR-based approach to study membrane protein dynamics Instructions for the sample preparation of spin-labeled membrane proteins Used HDX-MS as a precursor to guide spin labeling strategies for EPR methods Probed solvent accessibility at the single-residue level by ESEEM Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics. Solvent accessibilities of and distances between protein residues measured by pulsed-EPR approaches provide high-resolution information on dynamic protein motions. We describe protocols for the purification and site-directed spin labeling of integral membrane proteins. In our protocol, peptide-level HDX-MS is used as a precursor to guide single-residue resolution ESEEM accessibility measurements and spin labeling strategies for EPR applications. Exploiting the pentameric MscL channel as a model, we discuss the use of cwEPR, DEER/PELDOR, and ESEEM spectroscopies to interrogate membrane protein dynamics.
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