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Updated: Aug 7, 2026
06:18
Assessing Lysosomal Alkalinization in the Intestine of Live Caenorhabditis elegans
Published on: April 13, 2018
Chaperone-mediated autophagy in aging and disease
Ashish C Massey1, Cong Zhang, Ana Maria Cuervo
1Department of Anatomy and Structural Biology, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
Current Topics in Developmental Biology
|June 20, 2006
Summary
Chaperone-mediated autophagy (CMA) selectively degrades soluble proteins into lysosomes without vesicles. This pathway involves specific targeting motifs and direct translocation across the lysosomal membrane.
Area of Science:
- Cellular Biology
- Molecular Biology
Background:
- Autophagy degrades intracellular components via lysosomes.
- Mammals exhibit macroautophagy, microautophagy, and chaperone-mediated autophagy (CMA).
- CMA uniquely targets soluble proteins for lysosomal degradation.
Purpose of the Study:
- To elucidate the molecular mechanisms of CMA.
- To explore the pathophysiological relevance of CMA.
Main Methods:
- Focuses on the selective targeting of substrate proteins via KFERQ-like motifs.
- Describes the role of chaperone complexes (hsc70) and lysosomal receptors (LAMP-2A).
- Highlights direct translocation across the lysosomal membrane.
Main Results:
- CMA selectively degrades soluble proteins directly into lysosomes.
- Substrate proteins are recognized by KFERQ-like motifs and hsc70 chaperones.
- Lysosomal-associated membrane protein type 2A (LAMP-2A) facilitates translocation.
Conclusions:
- CMA's selectivity and direct translocation are key to its function.
- CMA plays a significant role in various physiological and pathological conditions.
- Understanding CMA mechanisms is crucial for its potential therapeutic applications.
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