Abstract:
:The evolutionarily conserved serine/threonine kinase TOR recruits different subunits to assemble the Target of Rapamycin Complex 1 (TORC1), which is inhibited by rapamycin and regulates ribosome biogenesis, autophagy, and lipid metabolism by regulating the expression of lipogenic genes. In addition, TORC1 participates in the cell cycle, increasing the length of the G2 phase. In the present work, we investigated the effect of rapamycin on cell growth, cell morphology and neutral lipid metabolism in the phytopathogenic fungus Ustilago maydis. Inhibition of TORC1 by rapamycin induced the formation of septa that separate the nuclei that were formed after mitosis. Regarding neutral lipid metabolism, a higher accumulation of triacylglycerols was not detected, but the cells did contain large lipid bodies, which suggests that small lipid bodies became fused into big lipid droplets. Vacuoles showed a similar behavior as the lipid bodies, and double labeling with Blue-CMAC and BODIPY indicates that vacuoles and lipid bodies were independent organelles. The results suggest that TORC1 has a role in cell morphology, lipid metabolism, and vacuolar physiology in U. maydis.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Romero-Aguilar L,Guerra-Sánchez G,Tenorio EP,Tapia-Rodriguez M,Matus-Ortega G,Flores-Herrera O,González J,Pardo JPdoi
10.1007/s00203-020-01833-ysubject
Has Abstractpub_date
2020-07-01 00:00:00pages
1211-1221issue
5eissn
0302-8933issn
1432-072Xpii
10.1007/s00203-020-01833-yjournal_volume
202pub_type
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