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Related Concept Videos

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Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
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Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
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Related Experiment Video

Updated: Sep 21, 2025

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Interaction of alpha-synuclein with lipids.

Neha Kachappilly1, Jyotirmay Srivastava1, Bani Prasad Swain1

  • 1School of Biology, IISER Thiruvananthapuram, Thiruvananthapuram, Kerala, India.

Methods in Cell Biology
|May 27, 2022
PubMed
Summary

Alpha-synuclein (α-syn) is a brain protein linked to Parkinson's disease. Understanding its interaction with cell membranes is key to distinguishing its normal functions from disease-causing aggregation.

Keywords:
Alpha-synucleinDisease-associated mutationsLipid interactionsMembrane bindingMembrane remodeling

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Molecular Biology

Background:

  • Alpha-synuclein (α-syn) is a natively unfolded protein abundant in the central nervous system.
  • Its precise roles in neurotransmission and cognition are not fully understood.
  • Misfolded α-syn aggregates into amyloid structures, a hallmark of neurodegenerative diseases like Parkinson's disease.

Purpose of the Study:

  • To investigate the critical role of alpha-synuclein (α-syn) interactions with lipid membranes in both physiological functions and pathological aggregation.
  • To understand how modulating factors influencing these membrane interactions can differentiate between healthy and diseased states of α-syn.

Main Methods:

  • The study likely involves biochemical assays, biophysical techniques, and potentially cell-based models to examine α-syn and lipid membrane interactions.
  • Analysis of disease-associated mutations within the α-syn lipid-binding domain.

Main Results:

  • Alpha-synuclein (α-syn) interactions with lipid membranes are crucial for its pathological aggregation into amyloid structures associated with Parkinson's disease.
  • These membrane interactions are also implicated in the protein's normal physiological functions.
  • Mutations linked to disease predominantly affect the α-syn lipid-binding domain, highlighting the significance of membrane association.

Conclusions:

  • Understanding the factors that modulate alpha-synuclein (α-syn) membrane interactions is essential for comprehending its dual role in health and neurodegenerative diseases.
  • Targeting these interactions could offer therapeutic strategies for Parkinson's disease and related disorders.