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  • 1
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    Role for the target enzyme in deactivation of photoreceptor G protein in vivo (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-02
    Description: Heterotrimeric guanosine 5'-triphosphate (GTP)-binding proteins (G proteins) are deactivated by hydrolysis of the GTP that they bind when activated by transmembrane receptors. Transducin, the G protein that relays visual excitation from rhodopsin to the cyclic guanosine 3',5'-monophosphate phosphodiesterase (PDE) in retinal photoreceptors, must be deactivated for the light response to recover. A point mutation in the gamma subunit of PDE impaired transducin-PDE interactions and slowed the recovery rate of the flash response in transgenic mouse rods. These results indicate that the normal deactivation of transducin in vivo requires the G protein to interact with its target enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsang, S H -- Burns, M E -- Calvert, P D -- Gouras, P -- Baylor, D A -- Goff, S P -- Arshavsky, V Y -- EY05750/EY/NEI NIH HHS/ -- EY10336/EY/NEI NIH HHS/ -- T32 EY07105/EY/NEI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1998 Oct 2;282(5386):117-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Edward S. Harkness Eye Institute and Department of Biochemistry and Molecular Biophysics, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9756475" target="_blank"〉PubMed〈/a〉
    Keywords: 3',5'-Cyclic-GMP Phosphodiesterases/genetics/*metabolism ; Animals ; Cyclic Nucleotide Phosphodiesterases, Type 6 ; Electroretinography ; Enzyme Activation ; Female ; Guanosine 5'-O-(3-Thiotriphosphate)/pharmacology ; Guanosine Triphosphate/metabolism ; Hydrolysis ; Light ; Male ; Mice ; Mice, Knockout ; Mice, Transgenic ; Point Mutation ; Retina/cytology/physiology ; Retinal Degeneration ; Rod Cell Outer Segment/*metabolism ; Transducin/*metabolism ; Transgenes ; *Vision, Ocular
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Ankyrin-G promotes cyclic nucleotide-gated channel transport to rod photoreceptor sensory cilia (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-03-21
    Description: 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.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2792576/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2792576/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kizhatil, Krishnakumar -- Baker, Sheila A -- Arshavsky, Vadim Y -- Bennett, Vann -- EY12859/EY/NEI NIH HHS/ -- P30 EY005722/EY/NEI NIH HHS/ -- P30 EY005722-23/EY/NEI NIH HHS/ -- R01 EY012859/EY/NEI NIH HHS/ -- R01 EY012859-10/EY/NEI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Mar 20;323(5921):1614-7. doi: 10.1126/science.1169789.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19299621" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Ankyrins/*metabolism ; Cattle ; Cell Line ; Cell Membrane/metabolism ; Cilia/*metabolism ; Cyclic Nucleotide-Gated Cation Channels/*metabolism ; Humans ; Mice ; Molecular Sequence Data ; Nerve Tissue Proteins/metabolism ; Recombinant Fusion Proteins/metabolism ; Rod Cell Outer Segment/*metabolism ; Xenopus laevis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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