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Fermie J, de Jager L, Foster HE, Veenendaal T, de Heus C, van Dijk S, ten Brink C, Oorschot V, Yang L, Li W, Müller WH, Howes S, Carter AP, Förster F, Posthuma G, Gerritsen HC, Klumperman J, Liv N. Bimodal endocytic probe for three-dimensional correlative light and electron microscopy. Cell Rep Methods 2022; 2:100220. [PMID: 35637912 PMCID: PMC9142762 DOI: 10.1016/j.crmeth.2022.100220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 02/04/2022] [Accepted: 04/26/2022] [Indexed: 12/03/2022]
Abstract
We present a bimodal endocytic tracer, fluorescent BSA-gold (fBSA-Au), as a fiducial marker for 2D and 3D correlative light and electron microscopy (CLEM) applications. fBSA-Au consists of colloidal gold (Au) particles stabilized with fluorescent BSA. The conjugate is efficiently endocytosed and distributed throughout the 3D endolysosomal network of cells and has an excellent visibility in both fluorescence microscopy (FM) and electron microscopy (EM). We demonstrate that fBSA-Au facilitates rapid registration in several 2D and 3D CLEM applications using Tokuyasu cryosections, resin-embedded material, and cryoelectron microscopy (cryo-EM). Endocytosed fBSA-Au benefits from a homogeneous 3D distribution throughout the endosomal system within the cell, does not obscure any cellular ultrastructure, and enables accurate (50-150 nm) correlation of fluorescence to EM data. The broad applicability and visibility in both modalities makes fBSA-Au an excellent endocytic fiducial marker for 2D and 3D (cryo)CLEM applications.
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Affiliation(s)
- Job Fermie
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
- Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Leanne de Jager
- Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Utrecht University, Utrecht, the Netherlands
| | - Helen E. Foster
- Medical Research Council Laboratory of Molecular Biology, Division of Structural Studies, Cambridge, UK
| | - Tineke Veenendaal
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Cecilia de Heus
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Suzanne van Dijk
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Corlinda ten Brink
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Viola Oorschot
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Lin Yang
- Institute of Genetics & Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Wei Li
- Institute of Genetics & Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Wally H. Müller
- Microbiology, Department of Biology, Utrecht University, Utrecht, the Netherlands
| | - Stuart Howes
- Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Utrecht University, Utrecht, the Netherlands
| | - Andrew P. Carter
- Medical Research Council Laboratory of Molecular Biology, Division of Structural Studies, Cambridge, UK
| | - Friedrich Förster
- Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Utrecht University, Utrecht, the Netherlands
| | - George Posthuma
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Hans C. Gerritsen
- Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Judith Klumperman
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Nalan Liv
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
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van Goor MK, de Jager L, Cheng Y, van der Wijst J. High-resolution structures of transient receptor potential vanilloid channels: Unveiling a functionally diverse group of ion channels. Protein Sci 2020; 29:1569-1580. [PMID: 32232875 PMCID: PMC7314393 DOI: 10.1002/pro.3861] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 03/21/2020] [Accepted: 03/24/2020] [Indexed: 12/13/2022]
Abstract
Transient receptor potential vanilloid (TRPV) channels are part of the superfamily of TRP ion channels and play important roles in widespread physiological processes including both neuronal and non‐neuronal pathways. Various diseases such as skeletal abnormalities, chronic pain, and cancer are associated with dysfunction of a TRPV channel. In order to obtain full understanding of disease pathogenesis and create opportunities for therapeutic intervention, it is essential to unravel how these channels function at a molecular level. In the past decade, incredible progress has been made in biochemical sample preparation of large membrane proteins and structural biology techniques, including cryo‐electron microscopy. This has resulted in high resolution structures of all TRPV channels, which has provided novel insights into the molecular mechanisms of channel gating and regulation that will be summarized in this review.
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Affiliation(s)
- Mark K van Goor
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Leanne de Jager
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Yifan Cheng
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California, United States.,Howard Hughes Medical Institute, University of California, San Francisco, California, United States
| | - Jenny van der Wijst
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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