GSBS Student Publications

Title

Pericentrin forms a complex with intraflagellar transport proteins and polycystin-2 and is required for primary cilia assembly

GSBS Program

Biochemistry & Molecular Pharmacology

Publication Date

2004-09-01

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Molecular Medicine; Department of Cell Biology

Document Type

Article

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Primary cilia are nonmotile microtubule structures that assemble from basal bodies by a process called intraflagellar transport (IFT) and are associated with several human diseases. Here, we show that the centrosome protein pericentrin (Pcnt) colocalizes with IFT proteins to the base of primary and motile cilia. Immunogold electron microscopy demonstrates that Pcnt is on or near basal bodies at the base of cilia. Pcnt depletion by RNA interference disrupts basal body localization of IFT proteins and the cation channel polycystin-2 (PC2), and inhibits primary cilia assembly in human epithelial cells. Conversely, silencing of IFT20 mislocalizes Pcnt from basal bodies and inhibits primary cilia assembly. Pcnt is found in spermatocyte IFT fractions, and IFT proteins are found in isolated centrosome fractions. Pcnt antibodies coimmunoprecipitate IFT proteins and PC2 from several cell lines and tissues. We conclude that Pcnt, IFTs, and PC2 form a complex in vertebrate cells that is required for assembly of primary cilia and possibly motile cilia and flagella.

DOI of Published Version

10.1083/jcb.200405023

Source

J Cell Biol. 2004 Aug 30;166(5):637-43. Link to article on publisher's site

Journal/Book/Conference Title

The Journal of cell biology

Related Resources

Link to article in PubMed

PubMed ID

15337773

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