ArticleCytoskeleton (Hoboken, N.J.)
Conformation of actin subunits at the barbed and pointed ends of F-actin with and without capping proteins.
Article in Cytoskeleton (Hoboken, N.J.). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed, 2 citations in OpenAlex.
- Phalloidin and DNase I-bound F-actin pointed end structures reveal principles of filament stabilization and disassembly.Nature communications · 2024Article
- β-Actin G342D as a Cause of NK Cell Deficiency Impairing Lytic Synapse Termination.Journal of immunology (Baltimore, Md. : 1950) · 2024Article
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Authors and funding
3 authors at 1 institution in 1 country.
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Abstract
Advances in cryo-electron microscopy have made possible the determination of structures of the barbed and pointed ends of F-actin, both in the absence and the presence of capping proteins that block subunit exchange. The conformation of the two exposed protomers at the barbed end resembles the "flat" conformation of protomers in the middle of F-actin. The barbed end changes little upon binding of CapZ, which in turn undergoes a major conformational change. At the pointed end, however, protomers have the "twisted" conformation characteristic of G-actin, whereas tropomodulin binding forces a flat conformation upon the second subunit. The structures provide a mechanistic understanding for the asymmetric addition/dissociation of actin subunits at the ends of F-actin and open the way to future studies of other regulators of filament end dynamics.
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