AI Article Synopsis
- Primary cilia are important sensory structures that aid in various signaling processes, with their positioning on the cell surface linked to the basal body (BB).
- Researchers discovered that the protein Girdin is crucial for localizing and positioning the BB during the formation of cilia in both C. elegans sensory neurons and human RPE-1 cells.
- Girdin's absence affects the arrangement of several cellular components, and it seems to anchor the BB through interactions with structures like rootletin and the junction protein AJM-1, highlighting Girdin's significant role in cilia formation and positioning.
Article Abstract
Primary cilia are ubiquitous sensory organelles that mediate diverse signaling pathways. Cilia position on the cell surface is determined by the location of the basal body (BB) that templates the cilium. The mechanisms that regulate BB positioning in the context of ciliogenesis are largely unknown. Here we show that the conserved signaling and scaffolding protein Girdin localizes to the proximal regions of centrioles and regulates BB positioning and ciliogenesis in Caenorhabditis elegans sensory neurons and human RPE-1 cells. Girdin depletion alters localization of the intercentriolar linker and ciliary rootlet component rootletin, and rootletin knockdown in RPE-1 cells mimics Girdin-dependent phenotypes. C. elegans Girdin also regulates localization of the apical junction component AJM-1, suggesting that in nematodes Girdin may position BBs via rootletin- and AJM-1-dependent anchoring to the cytoskeleton and plasma membrane, respectively. Together, our results describe a conserved role for Girdin in BB positioning and ciliogenesis.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5023068 | PMC |
| http://dx.doi.org/10.1016/j.devcel.2016.07.013 | DOI Listing |
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