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Related Concept Videos

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...
The Spindle Assembly Checkpoint02:19

The Spindle Assembly Checkpoint

The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
Separation of Sister Chromatids02:17

Separation of Sister Chromatids

At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...
Chirality in Nature02:30

Chirality in Nature

Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid. The...

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Related Experiment Video

Updated: Jul 4, 2026

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions
06:55

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions

Published on: June 7, 2020

The chaperone function: meanings and myths.

Peter A Lund1, R John Ellis

  • 1School of Biological Sciences, University of Birmingham, Birmingham B15 2TT, UK.

Novartis Foundation Symposium
|June 26, 2008
PubMed
Summary
This summary is machine-generated.

Molecular chaperones are proteins that prevent incorrect interactions. Thinking of chaperone function, rather than specific molecules, better explains their essential role in cellular health and protein folding.

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Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo
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Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo

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Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
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Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry

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Related Experiment Videos

Last Updated: Jul 4, 2026

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions
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Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions

Published on: June 7, 2020

Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo
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Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo

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Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
10:24

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry

Published on: June 7, 2018

Area of Science:

  • Molecular biology
  • Cell biology
  • Biochemistry

Background:

  • Proteins can undergo incorrect interactions when exposed to the cellular environment.
  • Protein aggregation can lead to non-functional and cytotoxic structures.
  • Molecular chaperones are known to play a role in preventing these issues.

Purpose of the Study:

  • To redefine the concept of molecular chaperones.
  • To propose a shift in perspective from chaperone molecules to chaperone function.
  • To explore the origins and concepts within the intracellular chaperone field.

Main Methods:

  • Conceptual analysis of chaperone roles.
  • Review of existing literature on intracellular chaperones.
  • Discussion of chaperone mechanisms and functions.

Main Results:

  • Chaperone function is defined as preventing or reversing incorrect molecular interactions.
  • This function is essential and mediated by diverse proteins.
  • Chaperones reduce protein aggregation through various mechanisms.

Conclusions:

  • A functional definition of chaperones is more accurate than a molecular one.
  • Chaperones are crucial for maintaining cellular integrity and preventing protein misfolding.
  • Understanding chaperone function provides a basis for exploring their roles beyond the intracellular environment.