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Related Experiment Videos

Protein interactions with myocilin.

Kelly Wentz-Hunter1, Jun Ueda, Beatrice Y J T Yue

  • 1Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago College of Medicine, Chicago, Illinois 60612, USA.

Investigative Ophthalmology & Visual Science
|January 5, 2002
PubMed
Summary
This summary is machine-generated.

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Myocilin, a glaucoma gene product, interacts with itself and myosin regulatory light chain (RLC) in trabecular meshwork cells. This suggests myocilin

Area of Science:

  • Ocular biology
  • Molecular genetics

Background:

  • Myocilin is a protein encoded by a gene associated with glaucoma.
  • Its in vivo interactions and cellular functions remain incompletely understood.

Purpose of the Study:

  • To identify proteins that interact with myocilin within cells.
  • To investigate the functional implications of these interactions in the trabecular meshwork.

Main Methods:

  • Yeast two-hybrid system to screen for myocilin-interacting proteins.
  • Mammalian two-hybrid system and coimmunoprecipitation to confirm interactions in trabecular meshwork cells.

Main Results:

  • Myocilin self-interaction (homomultimerization) was confirmed in vivo.
  • Myocilin interacts with myosin regulatory light chain (RLC), a component of the myosin motor protein complex.

Related Experiment Videos

  • These interactions were validated in human and bovine trabecular meshwork cells.

    • Conclusions:

    • Myocilin forms homomultimers independently of its olfactomedin-like domain.
    • The leucine zipper motif of myocilin is likely involved in its interaction with RLC.
    • Myocilin's interaction with RLC suggests a role in the actomyosin system and trabecular meshwork function.