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- Title
Structure of the siphophage neck–Tail complex suggests that conserved tail tip proteins facilitate receptor binding and tail assembly.
- Authors
Xiao, Hao; Tan, Le; Tan, Zhixue; Zhang, Yewei; Chen, Wenyuan; Li, Xiaowu; Song, Jingdong; Cheng, Lingpeng; Liu, Hongrong
- Abstract
Siphophages have a long, flexible, and noncontractile tail that connects to the capsid through a neck. The phage tail is essential for host cell recognition and virus–host cell interactions; moreover, it serves as a channel for genome delivery during infection. However, the in situ high-resolution structure of the neck–tail complex of siphophages remains unknown. Here, we present the structure of the siphophage lambda "wild type," the most widely used, laboratory-adapted fiberless mutant. The neck–tail complex comprises a channel formed by stacked 12-fold and hexameric rings and a 3-fold symmetrical tip. The interactions among DNA and a total of 246 tail protein molecules forming the tail and neck have been characterized. Structural comparisons of the tail tips, the most diversified region across the lambda and other long-tailed phages or tail-like machines, suggest that their tail tip contains conserved domains, which facilitate tail assembly, receptor binding, cell adsorption, and DNA retaining/releasing. These domains are distributed in different tail tip proteins in different phages or tail-like machines. The side tail fibers are not required for the phage particle to orient itself vertically to the surface of the host cell during attachment. This study shows that the tail tips, the most diversified region across bacteriophage lambda and other long-tailed phages (or tail-like machines), contain conserved domains, which facilitate tail assembly, receptor binding, cell adsorption, and DNA retention/release.
- Subjects
PROTEIN receptors; BACTERIOPHAGE lambda; HOST-virus relationships; CELLULAR recognition; BACTERIOPHAGES
- Publication
PLoS Biology, 2023, Vol 21, Issue 12, p1
- ISSN
1544-9173
- Publication type
Article
- DOI
10.1371/journal.pbio.3002441