National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
124378
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
110243
米国
引用
ジャーナル: Sci Adv / 年: 2025 タイトル: Structural basis of bacteriophage Ur-lambda infection initiation. 著者: Huaxin Yu / Chunyan Wang / Jian Yue / Wangbiao Guo / Ian J Molineux / Jun Liu / 要旨: Bacteriophages must recognize host receptors and penetrate the host cell envelope to initiate infection. How the classic phage λ initiates infection is not yet understood. Here, we combine cryo- ...Bacteriophages must recognize host receptors and penetrate the host cell envelope to initiate infection. How the classic phage λ initiates infection is not yet understood. Here, we combine cryo-electron microscopy and tomography to visualize infection initiation by Ur-λ, the original λ isolate that uses side fibers to adsorb rapidly to . We determine the structure of Ur-λ, resolving the full-length central and side fibers, thus providing a structural basis for host recognition. We show that Ur-λ contains six copies of its tape measure protein. We capture intermediates of the tail tip complex during infection initiation, revealing how extensive conformational changes enable adsorption, and visualize the trans-envelope channel required for genome ejection.