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Insights into assembly from structural analysis of bacteriophage PRD1
Nicola G A Abrescia1, Joseph J B Cockburn, Jonathan M Grimes
1Division of Structural Biology, The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Headington, Oxford OX3 7BN, UK.
Nature
|November 5, 2004
Summary
The bacteriophage PRD1 virus structure reveals specific protein roles in assembly. Protein P30 acts as a molecular tape-measure, guiding virus size and cementing facets, while P31 pentamers form vertex bases.
Area of Science:
- Structural Biology
- Virology
- Biochemistry
Background:
- Bacteriophage PRD1 is a membrane-containing virus with a complex structure.
- Understanding viral assembly mechanisms is crucial for virology and drug development.
Purpose of the Study:
- To determine the high-resolution structure of bacteriophage PRD1.
- To elucidate the roles of structural proteins P3, P16, P30, and P31 in virus assembly.
Main Methods:
- X-ray crystallography was used to determine the structure of bacteriophage PRD1 at approximately 4 Å resolution.
Main Results:
- The structure and location of proteins P3, P16, P30, and P31 were described.
- Protein P30 acts as a nucleator and molecular tape-measure, defining virus size and cementing icosahedral facets composed of P3 trimers.
- Protein P31 pentamers form vertex bases, interacting with P3 and P16.
Conclusions:
- Specific structural proteins play specialized roles in bacteriophage PRD1 assembly.
- Architectural similarities with adenovirus and PBCV-1 suggest a scalable assembly mechanism across major viral lineages.
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