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Related Experiment Video

Updated: Nov 11, 2025

Continuous High-resolution Microscopic Observation of Replicative Aging in Budding Yeast
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Protein interaction potential landscapes for yeast replicative aging.

Hao-Bo Guo1,2,3, Mehran Ghafari4, Weiwei Dang5

  • 1Department of Computer Science and Engineering, The University of Tennessee at Chattanooga, Chattanooga, TN, 37405, USA. guohaobo@gmail.com.

Scientific Reports
|March 31, 2021
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Summary
This summary is machine-generated.

We developed a new method to study gene networks during yeast aging. This approach reveals how protein and transcript levels change differently, highlighting the roles of essential and hub proteins in aging.

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Area of Science:

  • Systems biology
  • Molecular biology
  • Aging research

Background:

  • Replicative aging in Saccharomyces cerevisiae involves complex changes in gene networks.
  • Understanding these changes at a systems level is crucial for aging research.

Purpose of the Study:

  • To introduce a novel interaction potential landscape approach for mapping systems-level gene network changes during yeast replicative aging.
  • To investigate the distinct roles of essential and hub proteins in age-dependent network alterations.

Main Methods:

  • Developed an interaction potential landscape approach using quasi-potentials (negative logarithm of probabilities).
  • Calibrated interaction landscapes using young cells as a reference state.
  • Analyzed changes based on protein abundances versus transcript levels, focusing on intra-essential gene interactions.

Main Results:

  • Detected opposite landscape changes between protein and transcript levels, particularly for intra-essential gene interactions.
  • Demonstrated that essential proteins and hub proteins exhibit different behaviors on age-dependent interaction potential landscapes.
  • Confirmed that hub proteins tend to avoid each other, while essential proteins preferentially interact with other essential proteins.

Conclusions:

  • The interaction potential landscape approach is effective for inferring network profile changes during aging.
  • Essential and hub proteins play distinct roles in yeast replicative aging.
  • Essential hub proteins may be key to understanding the uncoupling of protein and transcript levels during aging.