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Title | Structure and replication of Pseudomonas aeruginosa phage JBD30. |
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Journal, issue, pages | EMBO J, Vol. 43, Issue 19, Page 4384-4405, Year 2024 |
Publish date | Aug 14, 2024 |
![]() | Lucie Valentová / Tibor Füzik / Jiří Nováček / Zuzana Hlavenková / Jakub Pospíšil / Pavel Plevka / ![]() |
PubMed Abstract | Bacteriophages are the most abundant biological entities on Earth, but our understanding of many aspects of their lifecycles is still incomplete. Here, we have structurally analysed the infection ...Bacteriophages are the most abundant biological entities on Earth, but our understanding of many aspects of their lifecycles is still incomplete. Here, we have structurally analysed the infection cycle of the siphophage Casadabanvirus JBD30. Using its baseplate, JBD30 attaches to Pseudomonas aeruginosa via the bacterial type IV pilus, whose subsequent retraction brings the phage to the bacterial cell surface. Cryo-electron microscopy structures of the baseplate-pilus complex show that the tripod of baseplate receptor-binding proteins attaches to the outer bacterial membrane. The tripod and baseplate then open to release three copies of the tape-measure protein, an event that is followed by DNA ejection. JBD30 major capsid proteins assemble into procapsids, which expand by 7% in diameter upon filling with phage dsDNA. The DNA-filled heads are finally joined with 180-nm-long tails, which bend easily because flexible loops mediate contacts between the successive discs of major tail proteins. It is likely that the structural features and replication mechanisms described here are conserved among siphophages that utilize the type IV pili for initial cell attachment. |
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Methods | EM (single particle) |
Resolution | 2.57 - 26.0 Å |
Structure data | EMDB-19256, PDB-8rk3: ![]() EMDB-19257: Bacteriophage JBD30 capsid - assymetric reconstruction ![]() EMDB-19258: Bacteriophage JBD30 procapsid computed with C5 symmetry EMDB-19259, PDB-8rk4: EMDB-19260, PDB-8rk5: ![]() EMDB-19261: Baseplate of bacteriophage JBD30 EMDB-19262, PDB-8rk6: EMDB-19263, PDB-8rk7: EMDB-19264, PDB-8rk8: EMDB-19265, PDB-8rk9: EMDB-19266, PDB-8rka: EMDB-19267, PDB-8rkb: ![]() EMDB-19268: Capsid-connector interface of bacteriophage JBD30 ![]() EMDB-19269: Capsid of bacteriophage JBD30 decorated with minor capsid protein trimers - asymmetric reconstruction EMDB-19270, PDB-8rkc: ![]() EMDB-19271: Capsid of bacteriophage JBD30 decorated with minor capsid protein trimers computed in C5 symmetry ![]() EMDB-19272: Capsid of bacteriophage JBD30 - asymmetric reconstruction ![]() EMDB-19273: Capsid of empty bacteriophage JBD30 particle computed in C5 symmetry ![]() EMDB-19274: Capsid of bacteriophage JBD30 computed in C5 symmetry EMDB-19280, PDB-8rkn: EMDB-19281, PDB-8rko: EMDB-19285, PDB-8rkx: EMDB-19439, PDB-8rqe: ![]() EMDB-19561: Bacteriophage JBD30 baseplate bound to pili type IV |
Chemicals | ![]() ChemComp-FE: |
Source |
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![]() | VIRUS / bacteriophage JBD30 / virion / baseplate / bacteriophage / receptor binding protein / tail fibre / baseplate core / baseplate upper protein / distal tail protein / baseplate hub protein / baseplate hub / tail / major tail protein / VIRAL PROTEIN / connector / stopper / head completion protein 2 / connector complex / portal / adaptor / empty particle / portal protein / adaptor protein / capsid / minor capsid protein / major capsid protein / procapsid / neck |