{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T05:38:59Z","timestamp":1790833139872,"version":"4.1.0"},"reference-count":44,"publisher":"National Academy of Sciences","issue":"40","license":[{"start":{"date-parts":[[2024,9,19]],"date-time":"2024-09-19T00:00:00Z","timestamp":1726704000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000011","name":"HHMI","doi-asserted-by":"publisher","award":["N\/A"],"award-info":[{"award-number":["N\/A"]}],"id":[{"id":"10.13039\/100000011","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:p>\n                    Mechanical force controls the opening and closing of mechanosensitive ion channels atop the hair bundles of the inner ear. The filamentous tip link connecting transduction channels to the tallest neighboring stereocilium modulates the force transmitted to the channels and thus changes their probability of opening. Each tip link comprises four molecules: a dimer of protocadherin 15 (PCDH15) and a dimer of cadherin 23, all of which are stabilized by Ca\n                    <jats:sup>2+<\/jats:sup>\n                    binding. Using a high-speed optical trap to examine dimeric PCDH15, we find that the protein\u2019s mechanical properties are sensitive to Ca\n                    <jats:sup>2+<\/jats:sup>\n                    and that the molecule exhibits limited unfolding at a physiological Ca\n                    <jats:sup>2+<\/jats:sup>\n                    concentration. PCDH15 can therefore modulate its stiffness without undergoing large unfolding events under physiological conditions. The experimentally determined stiffness of PCDH15 accords with published values for the stiffness of the gating spring, the mechanical element that controls the opening of mechanotransduction channels. When PCDH15 exhibits a point mutation, V507D, associated with nonsyndromic hearing loss, unfolding events occur more frequently under tension and refolding events occur less often than for the wild-type protein. Our results suggest that the maintenance of appropriate tension in the gating spring is critical to the appropriate transmission of force to transduction channels, and hence to hearing.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2404829121","type":"journal-article","created":{"date-parts":[[2024,10,2]],"date-time":"2024-10-02T16:54:16Z","timestamp":1727888056000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":6,"title":["Nanomechanics of wild-type and mutant dimers of the inner-ear tip-link protein protocadherin 15"],"prefix":"10.1073","volume":"121","author":[{"given":"Camila M.","family":"Villasante","sequence":"first","affiliation":[{"name":"Laboratory of Sensory Neuroscience, The Rockefeller University","place":["New York"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyue","family":"Deng","sequence":"additional","affiliation":[{"name":"Laboratory of Sensory Neuroscience, The Rockefeller University","place":["New York"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9746-6725","authenticated-orcid":false,"given":"Joel E.","family":"Cohen","sequence":"additional","affiliation":[{"name":"Laboratory of Populations, The Rockefeller University","place":["New York"]},{"name":"Earth Institute, Columbia University","place":["New York"]},{"name":"Department of Statistics, Columbia University","place":["New York"]},{"name":"Department of Statistics, University of Chicago","place":["Chicago"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0295-1323","authenticated-orcid":false,"given":"A. 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