7UYX image
Entry Detail
PDB ID:
7UYX
Keywords:
Title:
Structure of bacteriophage PA1c gp2
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-05-07
Release Date:
2023-05-10
Method Details:
Experimental Method:
Resolution:
2.63 Å
R-Value Free:
0.30
R-Value Work:
0.27
R-Value Observed:
0.27
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Bacteriophage PA1C gp2
Chain IDs:A, B, C, D
Chain Length:196
Number of Molecules:4
Biological Source:Pseudomonas phage PA1C
Ligand Molecules
Primary Citation
Identification of the bacteriophage nucleus protein interaction network.
Nat.Struct.Mol.Biol. 30 1653 1662 (2023)
PMID: 37667030 DOI: 10.1038/s41594-023-01094-5

Abstact

In the arms race between bacteria and bacteriophages (phages), some large-genome jumbo phages have evolved a protein shell that encloses their replicating genome to protect it against host immune factors. By segregating the genome from the host cytoplasm, however, the 'phage nucleus' introduces the need to specifically translocate messenger RNA and proteins through the nuclear shell and to dock capsids on the shell for genome packaging. Here, we use proximity labeling and localization mapping to systematically identify proteins associated with the major nuclear shell protein chimallin (ChmA) and other distinctive structures assembled by these phages. We identify six uncharacterized nuclear-shell-associated proteins, one of which directly interacts with self-assembled ChmA. The structure and protein-protein interaction network of this protein, which we term ChmB, suggest that it forms pores in the ChmA lattice that serve as docking sites for capsid genome packaging and may also participate in messenger RNA and/or protein translocation.

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Primary Citation of related structures