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PMID:11553327
| Citation |
Barr, MM, DeModena, J, Braun, D, Nguyen, CQ, Hall, DH and Sternberg, PW (2001) The Caenorhabditis elegans autosomal dominant polycystic kidney disease gene homologs lov-1 and pkd-2 act in the same pathway. Curr. Biol. 11:1341-6 |
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| Abstract |
Autosomal dominant polycystic kidney disease (ADPKD) strikes 1 in 1000 individuals and often results in end-stage renal failure. Mutations in either PKD1 or PKD2 account for 95% of all cases [1-3]. It has recently been demonstrated that polycystin-1 and polycystin-2 (encoded by PKD1 and PKD2, respectively) assemble to form a cation channel in vitro [4]. Here we determine that the Caenorhabditis elegans PKD1 and PKD2 homologs, lov-1 [5] and pkd-2, act in the same pathway in vivo. Mutations in either lov-1 or pkd-2 result in identical male sensory behavioral defects. Also, pkd-2;lov-1 double mutants are no more severe than either of the single mutants, indicating that lov-1 and pkd-2 act together. LOV-1::GFP and PKD-2::GFP are expressed in the same male-specific sensory neurons and are concentrated in cilia and cell bodies. Cytoplasmic, nonnuclear staining in cell bodies is punctate, suggesting that one pool of PKD-2 is localized to intracellular membranes while another is found in sensory cilia. In contrast to defects in the C. elegans autosomal recessive PKD gene osm-5 [6-8], the cilia of lov-1 and pkd-2 single mutants and of lov-1;pkd-2 double mutants are normal as judged by electron microscopy, demonstrating that lov-1 and pkd-2 are not required for ultrastructural development of male-specific sensory cilia. |
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| Keywords |
Animals; Caenorhabditis elegans/genetics; Caenorhabditis elegans/metabolism; Caenorhabditis elegans Proteins/genetics; Caenorhabditis elegans Proteins/metabolism; Helminth Proteins/genetics; Helminth Proteins/metabolism; Membrane Proteins/genetics; Membrane Proteins/metabolism; Nerve Tissue Proteins/genetics; Nerve Tissue Proteins/metabolism; Polycystic Kidney, Autosomal Dominant; Proteins/genetics; Proteins/metabolism; Signal Transduction; TRPP Cation Channels |
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Significance
Annotations
| Gene product | Qualifier | GO ID | GO term name | Evidence Code | with/from | Aspect | Notes | Status |
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