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Molecular Chaperones and Protein Folding

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...

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Related Experiment Video

Updated: Mar 12, 2026

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions

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Sil1-Mutant Mice Elucidate Chaperone Function in Neurological Disorders.

Stephan Buchkremer¹, José Andrés González Coraspe¹, Joachim Weis¹

¹Institute of Neuropathology, University Hospital RWTH Aachen, Aachen, Germany.

Journal of Neuromuscular Diseases

|November 18, 2016

Summary

The Sil1-mutant woozy mouse model reveals endoplasmic reticulum chaperone dysfunction mechanisms impacting nervous system and skeletal muscle. This model aids research into Marinesco-Sjögren syndrome and neuroprotective co-chaperone functions.

Keywords:

BiP cerebellar ataxia chaperone vacuolar myopathy woozy mouse

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Assay Development for High Content Quantification of Sod1 Mutant Protein Aggregate Formation in Living Cells

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Published on: October 4, 2017

Area of Science:

Molecular Biology
Neuroscience
Genetics

Background:

Chaperone dysfunction causes protein misfolding, affecting the nervous system and skeletal muscle.
Understanding chaperone function is crucial for treating genetic and acquired chaperonopathies.
Lack of suitable animal models hinders research into chaperone dysfunction mechanisms.

Purpose of the Study:

To introduce the Sil1-mutant woozy mouse as a model for impaired endoplasmic reticulum (ER) chaperone function.
To investigate molecular and cellular mechanisms affecting nervous system and skeletal muscle integrity.
To explore the utility of this model for studying neuroprotective co-chaperone function.

Main Methods:

Characterization of the Sil1-mutant woozy mouse model.
Analysis of molecular and cellular abnormalities in nervous system and skeletal muscle.
Biochemical investigation of nuclear envelope alterations.
Assessment of Purkinje cell survival pathways.

Main Results:

The woozy mouse model closely mimics human Marinesco-Sjögren syndrome.
Confirmed ER-stress and identified altered nuclear envelope in muscle, characteristic of SIL1-disease.
Suggests impaired excitation-contraction coupling in SIL1-pathophysiology.
Identified divergent pro- and anti-survival protein expression influencing Purkinje cell survival.

Conclusions:

The woozy mouse is a valuable model for studying ER-chaperone dysfunction in neurodegenerative and neuromuscular disorders.
This model facilitates research into neuroprotective co-chaperone roles and co-chaperone involvement in conditions like diabetic neuropathy.
Further investigation of SIL1-pathophysiology can inform therapeutic strategies for chaperonopathies.