{"id":6396,"date":"2023-02-17T06:54:27","date_gmt":"2023-02-17T06:54:27","guid":{"rendered":"https:\/\/beta.nanion.de\/resource_library\/2020-cryo-em-structure-of-human-cx31-3-gjc3-connexin-hemichannel\/"},"modified":"2023-02-17T06:54:27","modified_gmt":"2023-02-17T06:54:27","slug":"2020-cryo-em-structure-of-human-cx31-3-gjc3-connexin-hemichannel","status":"publish","type":"resource_library","link":"https:\/\/nanion.com\/zh-hans\/resource_library\/2020-cryo-em-structure-of-human-cx31-3-gjc3-connexin-hemichannel\/","title":{"rendered":"2020 &#8211; Cryo-EM structure of human Cx31.3\/GJC3 connexin hemichannel"},"content":{"rendered":"<p>Connexin family proteins assemble into hexameric channels called hemichannels\/connexons, which function as transmembrane channels or dock together to form gap junction intercellular channels (GJIChs). We determined\u00a0the cryo\u2013electron microscopy structures of human connexin 31.3 (Cx31.3)\/GJC3 hemichannels in the presence\u00a0and absence of calcium ions and with a hearing-loss mutation R15G at 2.3-, 2.5-, and 2.6-\u00c5 resolutions, respectively. Compared with available structures of GJICh in open conformation, Cx31.3 hemichannel shows substantial structural changes of highly conserved regions in the connexin family, including opening of calcium ion\u2013binding tunnels, reorganization of salt-bridge networks, exposure of lipid-binding sites, and collocation of amino-terminal helices at the cytoplasmic entrance. We also found that the hemichannel has a pore with a diameter of ~8 \u00c5 and selectively transports chloride ions. Our study provides structural insights into the permeant selectivity of Cx31.3 hemichannel.<\/p>\n","protected":false},"featured_media":0,"template":"","products_tags":[40],"resource_type":[75],"application_areas":[99],"therapeutic_areas":[],"target_categories":[341],"target_families":[342],"targets":[243],"resource_keyword":[],"class_list":["post-6396","resource_library","type-resource_library","status-publish","hentry","products_tags-orbit-mini","resource_type-publication","application_areas-pores-and-toxins","target_categories-pores-and-toxins","target_families-connexins","targets-cx43"],"acf":[],"_links":{"self":[{"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/resource_library\/6396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/resource_library"}],"about":[{"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/types\/resource_library"}],"wp:attachment":[{"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=6396"}],"wp:term":[{"taxonomy":"products_tags","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/products_tags?post=6396"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/resource_type?post=6396"},{"taxonomy":"application_areas","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/application_areas?post=6396"},{"taxonomy":"therapeutic_areas","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/therapeutic_areas?post=6396"},{"taxonomy":"target_categories","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/target_categories?post=6396"},{"taxonomy":"target_families","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/target_families?post=6396"},{"taxonomy":"targets","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/targets?post=6396"},{"taxonomy":"resource_keyword","embeddable":true,"href":"https:\/\/nanion.com\/zh-hans\/wp-json\/wp\/v2\/resource_keyword?post=6396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}