Mechanisms of actin disassembly and turnover

BL Goode, J Eskin, S Shekhar - Journal of Cell Biology, 2023 - rupress.org
Cellular actin networks exhibit a wide range of sizes, shapes, and architectures tailored to
their biological roles. Once assembled, these filamentous networks are either maintained in …

Actin bundles dynamics and architecture

S Rajan, DS Kudryashov, E Reisler - Biomolecules, 2023 - mdpi.com
Cells use the actin cytoskeleton for many of their functions, including their division,
adhesion, mechanosensing, endo-and phagocytosis, migration, and invasion. Actin bundles …

Peripheral thickening of the sarcomeres and pointed end elongation of the thin filaments are both promoted by SALS and its formin interaction partners

D Farkas, S Szikora, AS Jijumon, TF Polgár… - PLoS …, 2024 - journals.plos.org
During striated muscle development the first periodically repeated units appear in the
premyofibrils, consisting of immature sarcomeres that must undergo a substantial growth …

[HTML][HTML] Cyclase-associated protein is a pro-formin anti-capping processive depolymerase of actin barbed and pointed ends

EM Towsif, S Shekhar - Biorxiv, 2023 - ncbi.nlm.nih.gov
Cellular actin networks display distinct assembly and disassembly dynamics resulting from
multicomponent reactions occurring primarily at the two ends and the sides of actin filaments …

Single particle cryo-EM analysis of Rickettsia conorii Sca2 reveals a formin-like core

PJ Carman, G Rebowski, R Dominguez… - Journal of structural …, 2023 - Elsevier
Spotted fever group Rickettsia undergo actin-based motility inside infected eukaryotic cells
using Sca2 (surface cell antigen 2): an∼ 1800 amino-acid monomeric autotransporter …

Mitotic spindle positioning protein (MISP) preferentially binds to aged F-actin

EA Morales, GN Fitz, MJ Tyska - Journal of Biological Chemistry, 2024 - ASBMB
Actin bundling proteins crosslink filaments into polarized structures that shape and support
membrane protrusions including filopodia, microvilli, and stereocilia. In the case of epithelial …

[HTML][HTML] Multicomponent depolymerization of actin filament pointed ends by cofilin and cyclase-associated protein depends upon filament age

EM Towsif, BA Miller, H Ulrichs, S Shekhar - European Journal of Cell …, 2024 - Elsevier
Intracellular actin networks assemble through the addition of ATP-actin subunits at the
growing barbed ends of actin filaments. This is followed by “aging” of the filament via ATP …

[HTML][HTML] Antagonistic Effects of Actin-Specific Toxins on Salmonella Typhimurium Invasion into Mammalian Cells

DB Heisler, E Kudryashova, R Hitt, B Williams… - Biomolecules, 2024 - mdpi.com
Competition between bacterial species is a major factor shaping microbial communities. It is
possible but remains largely unexplored that competition between bacterial pathogens can …

Structural and functional mechanisms of actin isoforms

SM Heissler, K Chinthalapudi - The FEBS Journal, 2024 - Wiley Online Library
Actin is a highly conserved and fundamental protein in eukaryotes and participates in a
broad spectrum of cellular functions. Cells maintain a conserved ratio of actin isoforms, with …

Stabilization of F-actin by Salmonella effector SipA resembles the structural effects of inorganic phosphate and phalloidin

E Niedzialkowska, LA Runyan, E Kudryashova… - Structure, 2024 - cell.com
Entry of Salmonella into host enterocytes relies on its pathogenicity island 1 effector SipA.
We found that SipA binds to F-actin in a 1: 2 stoichiometry with sub-nanomolar affinity. A cryo …