Download MendeleyThree-dimensional structures of Vibrio cholerae typing podophage VP1 in two states.
Pang, H., Fan, F., Zheng, J., Xiao, H., Tan, Z., Song, J., Kan, B., Liu, H.(2024) Structure 32: 2364-2374.e2
- PubMed: 39471801
- DOI: https://doi.org/10.1016/j.str.2024.10.005
- Primary Citation of Related Structures:
8ZKK, 8ZKM, 9IN6 - PubMed Abstract:
Lytic podophages (VP1-VP5) play crucial roles in subtyping Vibrio cholerae O1 biotype El Tor. However, until now no structures of these phages have been available, which hindered our understanding of the molecular mechanisms of infection and DNA release. Here, we determined the cryoelectron microscopy (cryo-EM) structures of mature and DNA-ejected VP1 structures at near-atomic and subnanometer resolutions, respectively. The VP1 head is composed of 415 copies of the major capsid protein gp7 and 11 turret-shaped spikes. The VP1 tail consists of an adapter, a nozzle, a slender ring, and a tail needle, and is flanked by three extended fibers I and six trimeric fibers II. Conformational changes of fiber II in DNA-ejected VP1 may cause the release of the tail needle and core proteins, forming an elongated tail channel. Our structures provide insights into the molecular mechanisms of infection and DNA release for podophages with a tail needle.
Organizational Affiliation:
Institute of Interdisciplinary Studies, Key Laboratory for Matter Microstructure and Function of Hunan Province, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control, School of Physics and Electronics, Hunan Normal University, Changsha 410082, China.
