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Related Experiment Videos

Peripherin assembles into homopolymers in SW13 cells

C Cui1, P J Stambrook, L M Parysek

  • 1Department of Cell Biology, Neurobiology and Anatomy, University of Cincinnati College of Medicine, OH 45267-0521, USA.

Journal of Cell Science
|October 1, 1995
PubMed
Summary
This summary is machine-generated.

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Peripherin

Area of Science:

  • Neuroscience
  • Cell Biology
  • Protein Biochemistry

Background:

  • Intermediate filaments (IFs) are crucial cytoskeletal components in neurons.
  • Peripherin is a type III intermediate filament protein found in mature neurons.
  • Understanding peripherin's assembly is key to neuronal development and function.

Purpose of the Study:

  • To identify the essential regions of peripherin required for intermediate filament assembly.
  • To investigate the role of the amino terminus and carboxyl terminus in peripherin filament formation.
  • To compare peripherin's homopolymerization ability with other type III IF proteins.

Main Methods:

  • Transfection of full-length and mutant rat peripherin genes into intermediate filament-less SW13 cells.

Related Experiment Videos

  • Analysis of filament formation using microscopy.
  • Site-directed mutagenesis to create deletions in peripherin.
  • Investigation of protein translation initiation sites.

    • Main Results:

    • Full-length rat peripherin successfully formed filaments in SW13 cells.
    • Deletions in the amino terminus prevented filament assembly.
    • Deletion of the carboxyl-terminal tail did not inhibit filament formation.
    • Peripherin and alpha-internexin are unique among neuronal IF proteins for forming homopolymers.

    Conclusions:

    • The amino terminus of peripherin is essential for initiating intermediate filament assembly.
    • The carboxyl-terminal tail is not required for peripherin filament network formation.
    • Peripherin's ability to form homopolymers distinguishes it among neuronal IF proteins.