Phage major tail protein TP901-1 / Phage tail tube protein / Fibronectin type III domain / Fibronectin type 3 domain / Fibronectin type-III domain profile. / Fibronectin type III / Fibronectin type III superfamily / Immunoglobulin-like fold 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2020 タイトル: Architecture of the flexible tail tube of bacteriophage SPP1. 著者: Maximilian Zinke / Katrin A A Sachowsky / Carl Öster / Sophie Zinn-Justin / Raimond Ravelli / Gunnar F Schröder / Michael Habeck / Adam Lange / 要旨: Bacteriophage SPP1 is a double-stranded DNA virus of the Siphoviridae family that infects the bacterium Bacillus subtilis. This family of phages features a long, flexible, non-contractile tail that ...Bacteriophage SPP1 is a double-stranded DNA virus of the Siphoviridae family that infects the bacterium Bacillus subtilis. This family of phages features a long, flexible, non-contractile tail that has been difficult to characterize structurally. Here, we present the atomic structure of the tail tube of phage SPP1. Our hybrid structure is based on the integration of structural restraints from solid-state nuclear magnetic resonance (NMR) and a density map from cryo-EM. We show that the tail tube protein gp17.1 organizes into hexameric rings that are stacked by flexible linker domains and, thus, form a hollow flexible tube with a negatively charged lumen suitable for the transport of DNA. Additionally, we assess the dynamics of the system by combining relaxation measurements with variances in density maps.
A: Tail tube protein gp17.1* B: Tail tube protein gp17.1* C: Tail tube protein gp17.1* D: Tail tube protein gp17.1* E: Tail tube protein gp17.1* F: Tail tube protein gp17.1* G: Tail tube protein gp17.1* H: Tail tube protein gp17.1* I: Tail tube protein gp17.1* J: Tail tube protein gp17.1* K: Tail tube protein gp17.1* L: Tail tube protein gp17.1*