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Related Experiment Video

Updated: May 14, 2026

4D Imaging of Protein Aggregation in Live Cells

4D Imaging of Protein Aggregation in Live Cells

Published on: April 5, 2013

Quality control: putting protein aggregates in a bind.

Jay R Unruh¹, Brian D Slaughter, Rong Li

¹Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA.

Current Biology : CB

|January 26, 2013

Summary

This summary is machine-generated.

Unfolded protein aggregates are asymmetrically inherited in budding yeast. These aggregates are tethered to organelles in the mother cell, not transported back from the daughter cell.

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Area of Science:

Cell biology
Aging research
Molecular biology

Background:

Asymmetric inheritance of cellular components, including protein aggregates, is observed in budding yeast.
The mechanisms governing the asymmetric segregation of unfolded protein aggregates are not fully understood.
Protein aggregate accumulation is linked to cellular aging and age-related diseases.

Purpose of the Study:

To investigate the mechanism of asymmetric inheritance of unfolded protein aggregates in budding yeast.
To determine whether retrograde transport or organelle tethering is responsible for aggregate segregation.
To clarify the role of protein aggregates in the aging process of yeast cells.

Main Methods:

Utilized live-cell imaging techniques to track protein aggregates within budding yeast cells.
Employing genetic manipulation to disrupt potential transport pathways (e.g., retrograde transport).
Assessed the localization of protein aggregates relative to cellular organelles.

Main Results:

Demonstrated that unfolded protein aggregates are preferentially retained in the mother cell.
Provided evidence that aggregates are tethered to organelles within the mother cell.
Ruled out retrograde transport as the primary mechanism for aggregate segregation.

Conclusions:

Asymmetric inheritance of unfolded protein aggregates in budding yeast is mediated by organelle tethering.
This mechanism ensures the exclusion of damaged protein aggregates from daughter cells.
Understanding this process offers insights into age-related cellular maintenance and longevity.