Abstract：
:When the temperature is increased, the heat-shock response is activated to protect the cellular environment. The transcriptomics and proteomics of this process are intensively studied, while information about how the cell responds structurally to heat stress is mostly lacking. Here, Saccharomyces cerevisiae were subjected to a mild continuous heat shock (38°C) and intermittently cryo-immobilised for electron microscopy. Through measuring changes in all distinguishable organelle numbers, sizes and morphologies in over 2100 electron micrographs, a major restructuring of the internal architecture of the cell during the progressive heat shock was revealed. The cell grew larger but most organelles within it expanded even more, shrinking the volume of the cytoplasm. Organelles responded to heat shock at different times, both in terms of size and number, and adaptations of the morphology of some organelles (such as the vacuole) were observed. Multivesicular bodies grew by almost 70%, indicating a previously unknown involvement in the heat-shock response. A previously undescribed electron-translucent structure accumulated close to the plasma membrane. This all-encompassing approach provides a detailed chronological progression of organelle adaptation throughout the cellular heat-stress response.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Keuenhof KS,Larsson Berglund L,Malmgren Hill S,Schneider KL,Widlund PO,Nyström T,Höög JLdoi
10.1242/jcs.258325keywords:
["Budding yeast","Electron microscopy","Heat shock","Organelles","Ultrastructure"]subject
Has Abstractpub_date
2022-03-01 00:00:00issue
5eissn
0021-9533issn
1477-9137pii
271806journal_volume
135pub_type
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journal_title：Journal of cell science
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journal_title：Journal of cell science
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journal_title：Journal of cell science
pub_type： 杂志文章
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1999-07-01 00:00:00
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pub_type： 杂志文章
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