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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...
Channel Rhodopsins01:11

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.

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Updated: Jul 5, 2026

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

Published on: June 7, 2018

Molecular chaperones and photoreceptor function.

Maria Kosmaoglou1, Nele Schwarz, John S Bett

  • 1Division of Molecular and Cellular Neuroscience, UCL Institute of Ophthalmology, 11-43 Bath Street, London EC1 V 9EL, UK.

Progress in Retinal and Eye Research
|May 21, 2008
PubMed
Summary
This summary is machine-generated.

Molecular chaperones are crucial for protein folding and cellular processes. Specialized chaperones in retinal photoreceptor cells are essential for vision and preventing inherited retinal diseases like retinitis pigmentosa.

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Intracellular Refolding Assay
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Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis
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Related Experiment Videos

Last Updated: Jul 5, 2026

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

Intracellular Refolding Assay
07:18

Intracellular Refolding Assay

Published on: January 24, 2012

Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis
11:08

Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis

Published on: December 7, 2021

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Neuroscience

Background:

  • Molecular chaperones regulate protein folding, transport, and quality control in cells.
  • These processes are vital for numerous cellular functions, including signal transduction.
  • Chaperone dysfunction is implicated in various human diseases, particularly neurodegenerative disorders.

Purpose of the Study:

  • To investigate the specialized roles of molecular chaperones in retinal photoreceptor cells.
  • To understand how chaperone dysfunction contributes to inherited retinal diseases.
  • To explore the unique chaperone requirements essential for photoreceptor function.

Main Methods:

  • Analysis of protein folding and quality control mechanisms in photoreceptor cells.
  • Investigation of mutations in photoreceptor proteins, such as rhodopsin, and their impact on chaperone interactions.
  • Identification and characterization of mutations in molecular chaperones causing inherited retinal dysfunction.

Main Results:

  • Photoreceptor cells exhibit specialized molecular chaperone functions essential for their unique environment.
  • Mutations in rhodopsin, a key light-sensing protein, lead to misfolding and autosomal dominant retinitis pigmentosa, involving chaperone-mediated quality control.
  • Mutations directly in molecular chaperones cause inherited retinal degeneration, highlighting their critical roles in photoreceptor health.

Conclusions:

  • Molecular chaperones are indispensable for photoreceptor cell function and survival.
  • Dysfunctional chaperones or their targets contribute significantly to inherited retinal diseases.
  • Understanding these specialized chaperone roles offers potential therapeutic targets for vision loss.