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Autophagy

Autophagy

Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...

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Autophagic Cell Death

Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
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In-vitro Mutagenesis

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

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Related Experiment Video

Updated: Jun 28, 2026

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Published on: August 4, 2022

New insights into autophagy using a multiple knockout strain.

Yang Cao¹, Daniel J Klionsky

¹Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109-2216, USA.

|October 31, 2008

Summary

This summary is machine-generated.

Autophagy, a key cellular process, was studied in yeast using a novel multiple knockout strain lacking 24 autophagy-related (ATG) genes. This research provides new insights into the molecular mechanisms of autophagy and its disease relevance.

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Related Experiment Videos

Last Updated: Jun 28, 2026

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Published on: August 4, 2022

Study of Protein-protein Interactions in Autophagy Research

Study of Protein-protein Interactions in Autophagy Research

Published on: September 9, 2017

Quantitative Analysis of Autophagy using Advanced 3D Fluorescence Microscopy

Quantitative Analysis of Autophagy using Advanced 3D Fluorescence Microscopy

Published on: May 3, 2013

Area of Science:

Cell Biology
Molecular Biology
Genetics

Background:

Autophagy is a fundamental cellular process for degrading and recycling proteins and organelles.
Dysregulation of autophagy is implicated in numerous human diseases.
While autophagy-related (ATG) genes are identified, their precise molecular mechanisms require further elucidation for therapeutic development.

Purpose of the Study:

To investigate the molecular mechanisms of autophagy.
To determine the minimum genetic requirements for distinct autophagy processes.
To gain novel insights into autophagy distinct from in vitro studies.

Main Methods:

Generation of a Saccharomyces cerevisiae (yeast) strain with 24 autophagy-related (ATG) genes deleted.
Systematic analysis of autophagy in the multiple knockout strain.
Comparative analysis of findings with in vitro autophagy research.

Main Results:

Identification of essential ATG genes for specific autophagy functions.
Elucidation of the minimal genetic components necessary for autophagy.
Discovery of novel aspects of autophagy not apparent from in vitro methods.

Conclusions:

The multiple knockout yeast strain is a valuable tool for dissecting autophagy pathways.
This approach offers new perspectives on autophagy molecular mechanisms.
Findings contribute to understanding autophagy's role in human disease and potential therapeutics.