Loss of C. elegans BBS-7 and BBS-8 protein function results in cilia defects and compromised intraflagellar transport.

Abstract:

:Bardet-Biedl syndrome (BBS) is a genetically heterogeneous developmental disorder whose molecular basis is largely unknown. Here, we show that mutations in the Caenorhabditis elegans bbs-7 and bbs-8 genes cause structural and functional defects in cilia. C. elegans BBS proteins localize predominantly at the base of cilia, and like proteins involved in intraflagellar transport (IFT), a process necessary for cilia biogenesis and maintenance, move bidirectionally along the ciliary axoneme. Importantly, we demonstrate that BBS-7 and BBS-8 are required for the normal localization/motility of the IFT proteins OSM-5/Polaris and CHE-11, and to a notably lesser extent, CHE-2. We propose that BBS proteins play important, selective roles in the assembly and/or function of IFT particle components. Our findings also suggest that some of the cardinal and secondary symptoms of BBS, such as obesity, diabetes, cardiomyopathy, and learning defects may result from cilia dysfunction.

journal_name

Genes Dev

journal_title

Genes & development

authors

Blacque OE,Reardon MJ,Li C,McCarthy J,Mahjoub MR,Ansley SJ,Badano JL,Mah AK,Beales PL,Davidson WS,Johnsen RC,Audeh M,Plasterk RH,Baillie DL,Katsanis N,Quarmby LM,Wicks SR,Leroux MR

doi

10.1101/gad.1194004

subject

Has Abstract

pub_date

2004-07-01 00:00:00

pages

1630-42

issue

13

eissn

0890-9369

issn

1549-5477

pii

18/13/1630

journal_volume

18

pub_type

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