Cited by 23Genetic and Kidney Cyst DiseasesCystic Fibrosis Research AdvancesGenetics, Aging, and Longevity in Model Organisms

PACRG, a protein linked to ciliary motility, mediates cellular signaling

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Loucks, Catrina M., Bialas, Nathan J., Dekkers, Martijn P. J., Walker, Denise S., Grundy, Laura J., Li, Chunmei, Inglis, P. Nick, Kida, Katarzyna +4 more·2016·Molecular Biology of the Cell

Abstract

Cilia are microtubule-based organelles that project from nearly all mammalian cell types. Motile cilia generate fluid flow, whereas nonmotile (primary) cilia are required for sensory physiology and modulate various signal transduction pathways. Here we investigate the nonmotile ciliary signaling roles of parkin coregulated gene (PACRG), a protein linked to ciliary motility. PACRG is associated with the protofilament ribbon, a structure believed to dictate the regular arrangement of motility-associated ciliary components. Roles for protofilament ribbon–associated proteins in nonmotile cilia and cellular signaling have not been investigated. We show that PACRG localizes to a small subset of nonmotile cilia in Caenorhabditis elegans, suggesting an evolutionary adaptation for mediating specific sensory/signaling functions. We find that it influences a learning behavior known as gustatory plasticity, in which it is functionally coupled to heterotrimeric G-protein signaling. We also demonstrate that PACRG promotes longevity in C. elegans by acting upstream of the lifespan-promoting FOXO transcription factor DAF-16 and likely upstream of insulin/IGF signaling. Our findings establish previously unrecognized sensory/signaling functions for PACRG and point to a role for this protein in promoting longevity. Furthermore, our work suggests additional ciliary motility-signaling connections, since EFHC1 (EF-hand containing 1), a potential PACRG interaction partner similarly associated with the protofilament ribbon and ciliary motility, also positively regulates lifespan.

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Authors
Loucks, C. M., Bialas, N. J., Dekkers, M. P. J., Walker, D. S., Grundy, L. J., Li, C., Inglis, P. N., Kida, K., Schafer, W. R., Blacque, O. E., Jansen, G., & Leroux, M. R.
Affiliations
  • Simon Fraser University (CA)
  • Erasmus MC (NL)
  • MRC Laboratory of Molecular Biology (GB)
  • Department of Molecular Biology and Biochemistry and Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
  • University College Dublin (IE)
Corresponding author
Leroux, Michel R.
Venue
Molecular Biology of the Cell
Published
2016-07
Volume
27
Issue
13
Pages
2133-2144
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2404354114
Cited by
23
References
77
Citations by year
2025: 2 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 8 · 2020: 1 · 2019: 3 · 2018: 2 · 2017: 1
FWCI
1.62
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
  • RePub (Erasmus University Rotterdam) (submittedVersion, other-oa)
  • BORIS (University Library Bern) (submittedVersion, cc-by-nc-sa)
  • Open Access CRIS of the University of Bern
Funders
  • Wellcome Trust (WT103784MA, 103784/Z/14/Z)
  • Michael Smith Health Research BC
  • Science Foundation Ireland (11/PI/1037)
  • National Institutes of Health
  • Canadian Institutes of Health Research (MOP82870)
  • Medical Research Council (MC-A023-5PB91)
  • National Center for Research Resources
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cystic Fibrosis Research Advances
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
PACRG, primary cilia, ciliary motility, heterotrimeric G protein signaling, longevity, DAF-16/FOXO, insulin/IGF signaling, EFHC1, Caenorhabditis elegans, lifespan regulation, sensory signaling
MeSH terms
Animals, Calcium-Binding Proteins, Cilia, Microtubules, Signal Transduction, Caenorhabditis elegans, Molecular Chaperones, Caenorhabditis elegans Proteins, Forkhead Transcription Factors

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