Journal
CURRENT BIOLOGY
Volume 11, Issue 6, Pages 457-461Publisher
CELL PRESS
DOI: 10.1016/S0960-9822(01)00122-1
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Funding
- NIGMS NIH HHS [GM14642] Funding Source: Medline
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In this report, we show that the Caenorhabditis elegans gene osm-5 is homologous to the Chlamydomonas gene IFT88 and the mouse autosomal recessive polycystic kidney disease (ARPKD) gene, Tg737, The function of this ARPKD gene may be evolutionarily conserved: mutations result in defective ciliogenesis in worms [1], algae [2], and mice [2, 3], Intraflagellar transport (IFT) is essential for the development and maintenance of motile and sensory cilia [4]. The biochemically isolated IFT particle from Chlamydomonas flagella is composed of 16 polypeptides in one of two Complexes (A and B) [5, 6] whose movement is powered by kinesin II (anterograde) and cytoplasmic dynein (retrograde) [7-9]. We demonstrate that OSM-5 (a Complex B polypeptide), DAF-10 and CHE-11 (two Complex A polypeptides), and CHE-2 [10], a previously uncategorized IFT polypeptide, all move at the same rate in C. elegans sensory cilia, In the absence of osm-5, the C. elegans autosomal dominant PKD (ADPKD) gene products [11] accumulate in stunted cilia, suggesting that abnormal or lack of cilia or defects in IFT may result in diseases such as polycystic kidney disease (PKD).
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