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Gelsolin is the prototypical member of a family of Ca (2+) -dependent F-actin severing and capping proteins. A structure of Ca (2+) -bound full-length gelsolin at the barbed end shows domains G1G6 and the inter-domain linkers wrapping around F-actin. Another structure shows domains G1G3, a fragment produced during apoptosis, on both sides of F-actin. Conformational changes that trigger severing occur on one side of F-actin with G1G6 and on both sides with G1G3. Gelsolin remains bound after severing, blocking subunit exchange. | Gelsolin is the prototypical member of a family of Ca (2+) -dependent F-actin severing and capping proteins. A structure of Ca (2+) -bound full-length gelsolin at the barbed end shows domains G1G6 and the inter-domain linkers wrapping around F-actin. Another structure shows domains G1G3, a fragment produced during apoptosis, on both sides of F-actin. Conformational changes that trigger severing occur on one side of F-actin with G1G6 and on both sides with G1G3. Gelsolin remains bound after severing, blocking subunit exchange. | ||
, PMID:39345426<ref>PMID:39345426</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
Latest revision as of 09:13, 4 June 2025
Structure of full-length gelsolin bound to the barbed end of F-actin
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