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Related Concept Videos

Autophagy01:27

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,...
Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Autophagic Cell Death01:18

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.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Phase II Reactions: Acetylation Reactions01:24

Phase II Reactions: Acetylation Reactions

Acetylation, a phase II biotransformation reaction, introduces an acetyl group to drugs or their metabolites. Acetyltransferase enzymes facilitate this reaction, which resembles α-amino acid conjugation due to the addition of a functional group to the drug molecule.
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...

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In Situ Immunofluorescent Staining of Autophagy in Muscle Stem Cells
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How does acetylation regulate autophagy?

Cong Yi1, Li Yu

  • 1State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.

Autophagy
|June 27, 2012
PubMed
Summary
This summary is machine-generated.

Acetylation regulates autophagy, a key cellular process. This study uses yeast to uncover the molecular mechanisms behind acetylation

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Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Acetylation is crucial for biological processes like DNA repair and aging.
  • Acetylation also regulates autophagy, a cellular degradation process.
  • Histone deacetylase (HDAC) inhibitors and acetyltransferase knockdown influence autophagy.

Purpose of the Study:

  • To elucidate the molecular mechanisms of acetylation in autophagy regulation.
  • To investigate the complex role of acetylation in controlling autophagy.
  • To utilize Saccharomyces cerevisiae as a model for studying acetylation in autophagy.

Main Methods:

  • Genetic manipulation of Saccharomyces cerevisiae.
  • Testing the function of acetylases, deacetylases, and acetylation sites.
  • Observing the effects on autophagy regulation in a controlled system.

Main Results:

  • The study provides insights into the molecular mechanisms of acetylation in autophagy.
  • Demonstrates the conserved role of acetylation in regulating autophagy.
  • Identifies specific acetylases, deacetylases, and acetylation sites involved in autophagy control.

Conclusions:

  • Acetylation plays a significant and complex role in regulating autophagy.
  • Understanding these mechanisms can offer new therapeutic targets for diseases involving autophagy.
  • Saccharomyces cerevisiae is a valuable model for dissecting fundamental cellular processes.