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Related Concept Videos

Protein Folding01:25

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding01:22

Protein Folding

Overview
Protein Folding01:22

Protein Folding

Overview
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Bacterial Protein Maturation01:26

Bacterial Protein Maturation

Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...

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Extraction and Visualization of Protein Aggregates after Treatment of Escherichia coli with a Proteotoxic Stressor
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Extraction and Visualization of Protein Aggregates after Treatment of Escherichia coli with a Proteotoxic Stressor

Published on: June 29, 2021

Protein folding and aggregation in bacteria.

Raimon Sabate1, Natalia S de Groot, Salvador Ventura

  • 1Departament de Bioquímica i Biologia Molecular, Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.

Cellular and Molecular Life Sciences : CMLS
|April 2, 2010
PubMed
Summary
This summary is machine-generated.

Bacteria tightly control protein folding to ensure function. Misfolded proteins form inclusion bodies, revealing structures similar to human amyloid fibrils, offering insights into cellular protein aggregation.

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Last Updated: Jun 14, 2026

Extraction and Visualization of Protein Aggregates after Treatment of Escherichia coli with a Proteotoxic Stressor
07:59

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Published on: June 29, 2021

4D Imaging of Protein Aggregation in Live Cells
08:59

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Published on: April 5, 2013

Microfluidic Mixers for Studying Protein Folding
12:42

Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

Area of Science:

  • Cell Biology
  • Biochemistry
  • Microbiology

Background:

  • Proteins undergo conformational changes and interactions throughout their lifespan.
  • Protein functionality relies on proper folding, which is essential for cellular processes.
  • Bacteria possess sophisticated mechanisms to regulate protein folding, including genetic and transcriptional controls.

Purpose of the Study:

  • To review the intricate processes of protein folding and misfolding in prokaryotic organisms.
  • To explore how bacteria manage protein conformational states and cellular aggregation.
  • To highlight the relevance of bacterial systems for understanding protein aggregation in human diseases.

Main Methods:

  • This review synthesizes existing research on protein folding and aggregation in bacteria.
  • It examines cellular machinery involved in assisting polypeptide folding.
  • It discusses the formation and structural characteristics of inclusion bodies in prokaryotes.

Main Results:

  • Bacteria employ multi-layered strategies to ensure correct protein folding, involving genetic, transcriptional, and sequence-level controls.
  • Misfolded proteins in bacteria aggregate into inclusion bodies, which can contain functional and beta-sheet-rich structures.
  • Bacterial inclusion bodies share structural similarities with amyloid fibrils found in human neurodegenerative diseases.

Conclusions:

  • Prokaryotic systems offer a fundamental model for studying complex protein folding and aggregation.
  • Understanding bacterial protein aggregation mechanisms can provide insights into human amyloid-related pathologies.
  • Bacteria utilize similar structural principles for both essential cellular functions and pathogenic mechanisms like cytotoxicity.