- EMDB-34968: Straight fiber of DT57C bacteriophage in the full state -
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基本情報
登録情報
データベース: EMDB / ID: EMD-34968
タイトル
Straight fiber of DT57C bacteriophage in the full state
マップデータ
Map of the straight fiber of DT57C
試料
ウイルス: Escherichia phage DT57C (ファージ)
タンパク質・ペプチド: Central straight fiber
キーワード
Straight fiber / T5 / VIRUS / VIRAL PROTEIN
機能・相同性
Straight fiber protein PB4 spike domain / Straight fiber protein PB4 first Fn3-like domain / Straight fiber protein PB4 second Fn3-like domain / Straight fiber protein PB4 third Fn3-like domain / Central straight fiber
Ministry of Agriculture, Forestry and Fisheries (MAFF)
20320378
日本
引用
ジャーナル: Nat Commun / 年: 2023 タイトル: Nearly complete structure of bacteriophage DT57C reveals architecture of head-to-tail interface and lateral tail fibers. 著者: Rafael Ayala / Andrey V Moiseenko / Ting-Hua Chen / Eugene E Kulikov / Alla K Golomidova / Philipp S Orekhov / Maya A Street / Olga S Sokolova / Andrey V Letarov / Matthias Wolf / 要旨: The T5 family of viruses are tailed bacteriophages characterized by a long non-contractile tail. The bacteriophage DT57C is closely related to the paradigmal T5 phage, though it recognizes a ...The T5 family of viruses are tailed bacteriophages characterized by a long non-contractile tail. The bacteriophage DT57C is closely related to the paradigmal T5 phage, though it recognizes a different receptor (BtuB) and features highly divergent lateral tail fibers (LTF). Considerable portions of T5-like phages remain structurally uncharacterized. Here, we present the structure of DT57C determined by cryo-EM, and an atomic model of the virus, which was further explored using all-atom molecular dynamics simulations. The structure revealed a unique way of LTF attachment assisted by a dodecameric collar protein LtfC, and an unusual composition of the phage neck constructed of three protein rings. The tape measure protein (TMP) is organized within the tail tube in a three-stranded parallel α-helical coiled coil which makes direct contact with the genomic DNA. The presence of the C-terminal fragment of the TMP that remains within the tail tip suggests that the tail tip complex returns to its original state after DNA ejection. Our results provide a complete atomic structure of a T5-like phage, provide insights into the process of DNA ejection as well as a structural basis for the design of engineered phages and future mechanistic studies.