Related Experiment Video
Updated: Jan 3, 2026

Applications of pHluorin for Quantitative, Kinetic and High-throughput Analysis of Endocytosis in Budding Yeast
Published on: October 23, 2016
TORC1 regulates ESCRT-0 complex formation on the vacuolar membrane and microautophagy induction in yeast
Shamsul Morshed1, Tasnuva Sharmin1, Takashi Ushimaru2
1Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka, 422-8021, Japan.
Abstract:
Microautophagy is promoted after nutrient starvation and inactivation of target of rapamycin complex 1 (TORC1) kinase. Invagination of vacuolar membranes by endosomal sorting complex required for transport (ESCRT) is required for microautophagy. Vps27, a subunit of ESCRT-0, is recruited onto vacuolar membranes via dephosphorylation after TORC1 inactivation. Here, we showed that Hse1, another ESCRT-0 subunit, is also recruited onto vacuolar membranes after TORC1 inactivation, promoting formation of ESCRT-0 complex on vacuolar membranes. Hse1 recruitment was dependent on Vps27, whereas Vps27 recruitment was independent of Hse1. Not only Vps27 but also Hse1 was required for ESCRT-III recruitment onto vacuolar membranes and microautophagy induction after TORC1 inactivation. This study revealed that ESCRT-0 (Vps27-Hse1) complex formation on vacuolar membranes is important for microautophagy inactivation after TORC1 inactivation.
Related Concept Videos
Overview of Secretory Vesicles
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Vesicular Tubular Clusters
With the help of motor proteins such...
Intralumenal Vesicles and Multivesicular Bodies
Directing Proteins to the Rough Endoplasmic Reticulum
Recycling Endosomes and Transcytosis
The recycling endosome is not a single organelle but an extensively tubulated network of recycling pathways. It functions in storing molecules or transporting them across...
Protein Translocation Machinery on the ER Membrane
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the...

