Structural basis for cofilin binding and actin filament disassembly
Tanaka, K., Takeda, S., Mitsuoka, K., Oda, T., Kimura-Sakiyama, C., Maeda, Y., Narita, A.(2018) Nat Commun 9: 1860-1860
- PubMed: 29749375 
- DOI: https://doi.org/10.1038/s41467-018-04290-w
- Primary Citation of Related Structures:  
5YU8 - PubMed Abstract: 
Actin depolymerizing factor (ADF) and cofilin accelerate actin dynamics by severing and disassembling actin filaments. Here, we present the 3.8 Å resolution cryo-EM structure of cofilactin (cofilin-decorated actin filament). The actin subunit structure of cofilactin (C-form) is distinct from those of F-actin (F-form) and monomeric actin (G-form). During the transition between these three conformations, the inner domain of actin (subdomains 3 and 4) and the majority of subdomain 1 move as two separate rigid bodies. The cofilin-actin interface consists of three distinct parts. Based on the rigid body movements of actin and the three cofilin-actin interfaces, we propose models for the cooperative binding of cofilin to actin, preferential binding of cofilin to ADP-bound actin filaments and cofilin-mediated severing of actin filaments.
Organizational Affiliation: 
Structural Biology Research Center, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan.