Precision in situ cryo-correlative light and electron microscopy of optogenetically-positioned organelles.
J Cell Sci
; 2024 Sep 23.
Article
em En
| MEDLINE
| ID: mdl-39308425
ABSTRACT
Unambiguous targeting of cellular structures for in situ cryo-electron microscopy in the heterogeneous, dense, and compacted environment of the cytoplasm remains challenging. Here we have developed a cryogenic correlative light and electron microscopy (cryo-CLEM) workflow which combines thin cells grown on a mechanically defined substratum to rapidly analyse organelles and macromolecular complexes by cryo-electron tomography (cryo-ET). We coupled these advancements with optogenetics to redistribute perinuclear-localised organelles to the cell periphery, allowing visualisation of organelles otherwise positioned in cellular regions too thick for cryo-ET. This reliable and robust workflow allows for fast in situ analyses without the requirement for cryo-focused ion beam milling. Using this protocol, cells can be frozen, imaged by cryo-fluorescence microscopy and be ready for batch cryo-ET within a day.
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Bases de dados:
MEDLINE
Idioma:
En
Revista:
J Cell Sci
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Austrália