1ZKU image
Deposition Date 2005-05-04
Release Date 2005-08-09
Last Version Date 2024-02-14
Entry Detail
PDB ID:
1ZKU
Keywords:
Title:
Fitting of the gp9 structure in the EM density of bacteriophage T4 extended tail
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
15.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Baseplate structural protein Gp9
Gene (Uniprot):9
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R
Chain Length:288
Number of Molecules:18
Biological Source:Enterobacteria phage T4
Ligand Molecules
Primary Citation
The tail structure of bacteriophage T4 and its mechanism of contraction.
Nat.Struct.Mol.Biol. 12 810 813 (2005)
PMID: 16116440 DOI: 10.1038/nsmb975

Abstact

Bacteriophage T4 and related viruses have a contractile tail that serves as an efficient mechanical device for infecting bacteria. A three-dimensional cryo-EM reconstruction of the mature T4 tail assembly at 15-A resolution shows the hexagonal dome-shaped baseplate, the extended contractile sheath, the long tail fibers attached to the baseplate and the collar formed by six whiskers that interact with the long tail fibers. Comparison with the structure of the contracted tail shows that tail contraction is associated with a substantial rearrangement of the domains within the sheath protein and results in shortening of the sheath to about one-third of its original length. During contraction, the tail tube extends beneath the baseplate by about one-half of its total length and rotates by 345 degrees , allowing it to cross the host's periplasmic space.

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Primary Citation of related structures