RRC ID 45695
Author Brear AG, Yoon J, Wojtyniak M, Sengupta P.
Title Diverse cell type-specific mechanisms localize G protein-coupled receptors to Caenorhabditis elegans sensory cilia.
Journal Genetics
Abstract The localization of signaling molecules such as G protein-coupled receptors (GPCRs) to primary cilia is essential for correct signal transduction. Detailed studies over the past decade have begun to elucidate the diverse sequences and trafficking mechanisms that sort and transport GPCRs to the ciliary compartment. However, a systematic analysis of the pathways required for ciliary targeting of multiple GPCRs in different cell types in vivo has not been reported. Here we describe the sequences and proteins required to localize GPCRs to the cilia of the AWB and ASK sensory neuron types in Caenorhabditis elegans. We find that GPCRs expressed in AWB or ASK utilize conserved and novel sequences for ciliary localization, and that the requirement for a ciliary targeting sequence in a given GPCR is different in different neuron types. Consistent with the presence of multiple ciliary targeting sequences, we identify diverse proteins required for ciliary localization of individual GPCRs in AWB and ASK. In particular, we show that the TUB-1 Tubby protein is required for ciliary localization of a subset of GPCRs, implying that defects in GPCR localization may be causal to the metabolic phenotypes of tub-1 mutants. Together, our results describe a remarkable complexity of mechanisms that act in a protein- and cell-specific manner to localize GPCRs to cilia, and suggest that this diversity allows for precise regulation of GPCR-mediated signaling as a function of external and internal context.
Volume 197(2)
Pages 667-84
Published 2014-6-1
DOI 10.1534/genetics.114.161349
PII genetics.114.161349
PMID 24646679
PMC PMC4063923
MeSH Amino Acid Sequence Animals Caenorhabditis elegans / genetics* Caenorhabditis elegans / physiology Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / physiology* Cilia / physiology* Conserved Sequence Molecular Sequence Data Receptors, G-Protein-Coupled / genetics Receptors, G-Protein-Coupled / physiology* Sensory Receptor Cells / physiology Signal Transduction
IF 4.015
Times Cited 10
C.elegans tm2526 tm1703 tm2322 tm3100 tm2705 tm2452 tm925 tm1746 tm1946