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Correlated cryogenic photoactivated localization microscopy and cryo-electron tomography

Chang, Yi-Wei and Chen, Songye and Tocheva, Elitza I. and Treuner-Lange, Anke and Löbach, Stephanie and Søgaard-Andersen, Lotte and Jensen, Grant J. (2014) Correlated cryogenic photoactivated localization microscopy and cryo-electron tomography. Nature Methods, 11 (7). pp. 737-739. ISSN 1548-7091. PMCID PMC4081473. doi:10.1038/nmeth.2961.

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Cryo-electron tomography (CET) produces three-dimensional images of cells in a near-native state at macromolecular resolution, but identifying structures of interest can be challenging. Here we describe a correlated cryo-PALM (photoactivated localization microscopy)-CET method for localizing objects within cryo-tomograms to beyond the diffraction limit of the light microscope. Using cryo-PALM-CET, we identified multiple and new conformations of the dynamic type VI secretion system in the crowded interior of Myxococcus xanthus.

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URLURL TypeDescription ReadCube access CentralArticle
Chang, Yi-Wei0000-0003-2391-473X
Chen, Songye0000-0001-5407-5049
Tocheva, Elitza I.0000-0002-4869-8319
Jensen, Grant J.0000-0003-1556-4864
Additional Information:© 2014 Macmillan Publishers. Received 06 February 2014;Accepted 10 April 2014; Published online 11 May 2014. We thank A.W. McDowall, C. Oikonomou, A. Konovalova, L. Cai and T. Zhiyentayev for assistance and discussions. This work was supported in part by US National Institutes of Health grant R01 GM094800B to G.J.J., the Howard Hughes Medical Institute and the Max Planck Society. Contributions: Y.-W.C. and G.J.J. conceived the cryo-PALM idea. Y.-W.C. and S.C. configured the optical system. Y.-W.C., S.C. and E.I.T. tested fluorophores for photoactivatability at low temperatures. Y.-W.C. improved stability of cryo-FLM stage, prepared samples, overcame laser-induced ice crystallization on the sample, acquired and analyzed cryo-PALM data and conducted correlated cryo-PALM-CET. A.T.-L., S.L. and L.S.-A. generated M. xanthus strains and conducted functional analyses. Y.-W.C. and G.J.J. wrote the paper with input from all authors. Competing financial interests: Y.-W.C., S.C., E.I.T. and G.J.J. are affiliated with the California Institute of Technology, which has filed a patent application based on this work.
Funding AgencyGrant Number
NIHR01 GM094800B
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Max Planck SocietyUNSPECIFIED
Issue or Number:7
PubMed Central ID:PMC4081473
Record Number:CaltechAUTHORS:20140402-152401360
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44615
Deposited By: George Porter
Deposited On:25 Jun 2014 23:33
Last Modified:10 Nov 2021 16:54

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