6J0N image
Entry Detail
PDB ID:
6J0N
EMDB ID:
Title:
Cryo-EM Structure of an Extracellular Contractile Injection System, baseplate in extended state, refined in C6 symmetry
Biological Source:
PDB Version:
Deposition Date:
2018-12-25
Release Date:
2019-04-10
Method Details:
Experimental Method:
Resolution:
3.50 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Pvc1
Chain IDs:QA (auth: 1), RA (auth: 2), SA (auth: 3), TA (auth: 4), UA (auth: 5), BB (auth: z)
Chain Length:149
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc9
Chain IDs:A (auth: D), B (auth: E), C (auth: F), D (auth: G), E (auth: H), F (auth: I)
Chain Length:140
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc11
Chain IDs:G (auth: J), H (auth: K), I (auth: L), J (auth: M), K (auth: N), L (auth: O)
Chain Length:355
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc12
Chain IDs:M (auth: P), N (auth: Q), O (auth: R), P (auth: S), Q (auth: T), R (auth: U)
Chain Length:152
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc4
Chain IDs:S (auth: V), T (auth: W), U (auth: X), V (auth: Y), W (auth: Z), X (auth: a)
Chain Length:410
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc7
Chain IDs:Y (auth: b), Z (auth: c), AA (auth: d), BA (auth: e), CA (auth: f), DA (auth: g)
Chain Length:229
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc2
Chain IDs:EA (auth: h), FA (auth: i), GA (auth: j), HA (auth: k), IA (auth: l), JA (auth: m)
Chain Length:140
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc5
Chain IDs:KA (auth: n), LA (auth: o), MA (auth: p), NA (auth: q), OA (auth: r), PA (auth: s)
Chain Length:152
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Polymer Type:polypeptide(L)
Description:Pvc3
Chain IDs:VA (auth: t), WA (auth: u), XA (auth: v), YA (auth: w), ZA (auth: x), AB (auth: y)
Chain Length:950
Number of Molecules:6
Biological Source:Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)
Ligand Molecules
Primary Citation
Cryo-EM Structure and Assembly of an Extracellular Contractile Injection System.
Cell 177 370 383.e15 (2019)
PMID: 30905475 DOI: 10.1016/j.cell.2019.02.020

Abstact

Contractile injection systems (CISs) are cell-puncturing nanodevices that share ancestry with contractile tail bacteriophages. Photorhabdus virulence cassette (PVC) represents one group of extracellular CISs that are present in both bacteria and archaea. Here, we report the cryo-EM structure of an intact PVC from P. asymbiotica. This over 10-MDa device resembles a simplified T4 phage tail, containing a hexagonal baseplate complex with six fibers and a capped 117-nanometer sheath-tube trunk. One distinct feature of the PVC is the presence of three variants for both tube and sheath proteins, indicating a functional specialization of them during evolution. The terminal hexameric cap docks onto the topmost layer of the inner tube and locks the outer sheath in pre-contraction state with six stretching arms. Our results on the PVC provide a framework for understanding the general mechanism of widespread CISs and pave the way for using them as delivery tools in biological or therapeutic applications.

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