Biological Assembly 1  

 3D View: Structure

Global Symmetry: Icosahedral - I  (3D View)
Global Stoichiometry: Homo 420-mer - A420 

Biological assembly 1 assigned by authors and generated by (software)

Macromolecule Content

• Total Structure Weight: 215.63 kDa 
• Atom Count: 9653 
• Modelled Residue Count: 1960 
• Deposited Residue Count: 1974 
• Unique protein chains: 1

3DDX

HK97 bacteriophage capsid Expansion Intermediate-II model

• DOI: 10.2210/pdb3DDX/pdb

• Classification: VIRUS
• Organism(s): Escherichia virus HK97
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-06-06 Released: 2008-11-04 
• Deposition Author(s): Lee, K.K., Gan, L., Conway, J.F., Hendrix, R.W., Steven, A.C., Johnson, J.E.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Virus capsid expansion driven by the capture of mobile surface loops.

Lee, K.K., Gan, L., Tsuruta, H., Moyer, C., Conway, J.F., Duda, R.L., Hendrix, R.W., Steven, A.C., Johnson, J.E.

(2008) Structure 16: 1491-1502

• PubMed: 18940605 
• DOI: 10.1016/j.str.2008.06.014
• Primary Citation of Related Structures:  
  3DDX


• PubMed Abstract: 
  

The capsids of tailed-DNA bacteriophages first assemble as procapsids, which mature by converting into a new form that is strong enough to contain a densely packed viral chromosome. We demonstrate that the intersubunit crosslinking that occurs during maturation of HK97 capsids actually promotes the structural transformation. Small-angle X-ray scattering and crosslinking assays reveal that a shift in the crosslink pattern accompanies conversion of a semimature particle, Expansion Intermediate-I/II, to a more mature state, Balloon. This transition occurs in a switch-like fashion. We find that crosslink formation shifts the global conformational balance to favor the balloon state. A pseudoatomic model of EI-I/II derived from cryo-EM provides insight into the relationship between crosslink formation and conformational switching.

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Organizational Affiliation: 

Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Major capsid protein	A, B, C, D, E, F, G	282	Escherichia virus HK97	Mutation(s): 0  Gene Names: 5
Find proteins for P49861 (Enterobacteria phage HK97) Explore P49861  Go to UniProtKB:  P49861

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-06-06 
• Released Date: 2008-11-04 
Deposition Author(s): Lee, K.K., Gan, L., Conway, J.F., Hendrix, R.W., Steven, A.C., Johnson, J.E.

Revision History  

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