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Is outer arm dynein intermediate chain 1 multifunctional?

K Ogawa1, H Takai, A Ogiwara

  • 1National Institute for Basic Biology, Okazaki, Japan.

Molecular Biology of the Cell
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Sea urchin sperm outer arm dynein’s IC1 chain has a unique structure, distinct from other intermediate chains. This novel dynein intermediate chain may be multifunctional and is a core unit of sperm outer arm dynein.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Sea urchin sperm outer arm dynein is crucial for motility.
  • It comprises three intermediate chains: IC1, IC2, and IC3.
  • IC2 and IC3 are WD-family proteins involved in protein-protein interactions.

Purpose of the Study:

  • To characterize the molecular structure and function of IC1.
  • To investigate the evolutionary conservation and potential roles of IC1.

Main Methods:

  • Molecular cloning and sequencing of IC1.
  • Expression of IC1 domains in bacteria and antibody generation.
  • Affinity chromatography using phenylarsine oxide.

Main Results:

Related Experiment Videos

  • IC1 possesses a unique primary structure with thioredoxin-, nucleoside diphosphate kinase-homologous regions, and a C-terminal acidic tail.
  • Antibodies against IC1 recognized homologous proteins in other species, suggesting conserved function.
  • IC1 contains vicinal dithiols, indicating a role in redox regulation.

    • Conclusions:

    • IC1 is a novel, potentially multifunctional dynein intermediate chain.
    • The three intermediate chains form the basic core of sperm outer arm dynein.
    • IC1's structure suggests diverse roles beyond protein-protein interactions.