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Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo
Published on: July 13, 2015
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Structural organization of the C1a-e-c supercomplex within the ciliary central apparatus
Gang Fu1, Lei Zhao2, Erin Dymek3
1Departments of Cell Biology and Biophysics, University of Texas Southwestern Medical Center, Dallas, TX.
The Journal of Cell Biology
|November 2, 2019
Summary
Researchers identified a large protein complex, the C1a-e-c supercomplex, essential for motile cilia function. Its assembly requires PF16 protein, and its components are crucial for regulating ciliary beating and preventing disease.
Area of Science:
- Cell Biology
- Structural Biology
- Biochemistry
Background:
- Motile cilia possess a central apparatus (CA) with projections vital for ciliary motility.
- CA assembly defects lead to impaired ciliary function and human diseases.
- The protein composition and function of CA projections remain largely uncharacterized.
Purpose of the Study:
- To elucidate the protein composition and structural organization of the CA projections.
- To understand the molecular basis of CA function in regulating ciliary motility.
Main Methods:
- Integration of biochemical and genetic approaches.
- Cryo-electron tomography for high-resolution structural analysis.
- Nanogold labeling for subunit localization within the complex.
Main Results:
- Identification of the C1a-e-c supercomplex (>2 MD) within the CA.
- Demonstration that PF16 protein is required for C1a-e-c supercomplex assembly.
- Localization of FAP76, FAP81, FAP92, and FAP216 as components of the supercomplex.
- Observed impaired ciliary motility upon loss of any identified subunit.
Conclusions:
- The C1a-e-c supercomplex is a key structural and functional component of the motile cilia central apparatus.
- Understanding the subunit organization and 3D structure of the CA is critical for deciphering ciliary motility regulation.
- This study provides foundational insights into the molecular mechanisms governing ciliary beating.
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