1IF0

PSEUDO-ATOMIC MODEL OF BACTERIOPHAGE HK97 PROCAPSID (PROHEAD II)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 12.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Virus maturation involving large subunit rotations and local refolding.

Conway, J.F.Wikoff, W.R.Cheng, N.Duda, R.L.Hendrix, R.W.Johnson, J.E.Steven, A.C.

(2001) Science 292: 744-748

  • DOI: 10.1126/science.1058069
  • Primary Citation of Related Structures:  
    1IF0

  • PubMed Abstract: 
  • Large-scale conformational changes transform viral precursors into infectious virions. The structure of bacteriophage HK97 capsid, Head-II, was recently solved by crystallography, revealing a catenated cross-linked topology. We have visualized its precursor, Prohead-II, by cryoelectron microscopy and modeled the conformational change by appropriately adapting Head-II ...

    Large-scale conformational changes transform viral precursors into infectious virions. The structure of bacteriophage HK97 capsid, Head-II, was recently solved by crystallography, revealing a catenated cross-linked topology. We have visualized its precursor, Prohead-II, by cryoelectron microscopy and modeled the conformational change by appropriately adapting Head-II. Rigid-body rotations ( approximately 40 degrees) cause switching to an entirely different set of interactions; in addition, two motifs undergo refolding. These changes stabilize the capsid by increasing the surface area buried at interfaces and bringing the cross-link-forming residues, initially approximately 40 angstroms apart, close together. The inner surface of Prohead-II is negatively charged, suggesting that the transition is triggered electrostatically by DNA packaging.


    Related Citations: 
    • Topologically Linked Protein Rings in the Bacteriophage HK97 Capsid
      Wikoff, W.R., Liljas, L., Duda, R.L., Tsuruta, H., Hendrix, R.W., Johnson, J.E.
      (2000) Science 289: 2129
    • Proteolytic and Conformational Control of Virus Capsid Maturation: The Bacteriophage HK97 System
      Conway, J.F., Duda, R.L., Cheng, N., Hendrix, R.W., Steven, A.C.
      (1995) Science 253: 86

    Organizational Affiliation

    Laboratory of Structural Biology Research, National Institute of Arthritis, Musculoskeletal and Skin Diseases, Bethesda, MD 20892, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (MAJOR CAPSID PROTEIN GP5) ABCDEFG256Escherichia virus HK97Mutation(s): 0 
Gene Names: 5
Find proteins for P49861 (Enterobacteria phage HK97)
Explore P49861 
Go to UniProtKB:  P49861
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 12.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-11-06
    Changes: Data collection, Other