Ankyrin-G promotes cyclic nucleotide-gated channel transport to rod photoreceptor sensory cilia.
Journal Article (Journal Article)
Cyclic nucleotide-gated (CNG) channels localize exclusively to the plasma membrane of photosensitive outer segments of rod photoreceptors where they generate the electrical response to light. Here, we report the finding that targeting of CNG channels to the rod outer segment required their interaction with ankyrin-G. Ankyrin-G localized exclusively to rod outer segments, coimmunoprecipitated with the CNG channel, and bound to the C-terminal domain of the channel beta1 subunit. Ankyrin-G depletion in neonatal mouse retinas markedly reduced CNG channel expression. Transgenic expression of CNG channel beta-subunit mutants in Xenopus rods showed that ankyrin-G binding was necessary and sufficient for targeting of the beta1 subunit to outer segments. Thus, ankyrin-G is required for transport of CNG channels to the plasma membrane of rod outer segments.
Full Text
Duke Authors
Cited Authors
- Kizhatil, K; Baker, SA; Arshavsky, VY; Bennett, V
Published Date
- March 20, 2009
Published In
Volume / Issue
- 323 / 5921
Start / End Page
- 1614 - 1617
PubMed ID
- 19299621
Pubmed Central ID
- PMC2792576
Electronic International Standard Serial Number (EISSN)
- 1095-9203
Digital Object Identifier (DOI)
- 10.1126/science.1169789
Language
- eng
Conference Location
- United States