Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Icosahedral - I  (3D View)
Global Stoichiometry: Homo 60-mer - A60 

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

Macromolecule Content

• Total Structure Weight: 69.12 kDa 
• Atom Count: 5204 
• Modelled Residue Count: 630 
• Deposited Residue Count: 645 
• Unique protein chains: 1

4ZOR

The structure of the S37P MS2 viral capsid assembly.

• PDB DOI: 10.2210/pdb4ZOR/pdb

• Classification: VIRUS
• Organism(s): Escherichia virus MS2
• Expression System: Escherichia coli K-12
• Mutation(s): Yes 


• Deposited: 2015-05-06 Released: 2016-09-07 
• Deposition Author(s): Asensio, M.A., Sankaran, B., Zwart, P.H., Tullman-Ercek, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.242 
• R-Value Work: 0.218 
• R-Value Observed: 0.219 

Literature

A Selection for Assembly Reveals That a Single Amino Acid Mutant of the Bacteriophage MS2 Coat Protein Forms a Smaller Virus-like Particle.

Asensio, M.A., Morella, N.M., Jakobson, C.M., Hartman, E.C., Glasgow, J.E., Sankaran, B., Zwart, P.H., Tullman-Ercek, D.

(2016) Nano Lett 16: 5944-5950

• PubMed: 27549001 
• DOI: 10.1021/acs.nanolett.6b02948
• Primary Citation of Related Structures:  
  4ZOR


• PubMed Abstract: 
  

Virus-like particles are used to encapsulate drugs, imaging agents, enzymes, and other biologically active molecules in order to enhance their function. However, the size of most virus-like particles is inflexible, precluding the design of appropriately sized containers for different applications. Here, we describe a chromatographic selection for virus-like particle assembly. Using this selection, we identified a single amino acid substitution to the coat protein of bacteriophage MS2 that mediates a uniform switch in particle geometry from T = 3 to T = 1 icosahedral symmetry. The resulting smaller particle retains the ability to be disassembled and reassembled in vitro and to be chemically modified to load cargo into its interior cavity. The pair of 27 and 17 nm MS2 particles will allow direct examination of the effect of size on function in established applications of virus-like particles, including drug delivery and imaging.

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Organizational Affiliation: 

Department of Chemical and Biological Engineering, Northwestern University , Evanston, Illinois 60091, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Coat protein	A, B, C, D, E	129	Escherichia virus MS2	Mutation(s): 1
UniProt
Find proteins for P03612 (Escherichia phage MS2) Explore P03612  Go to UniProtKB:  P03612

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	F [auth A], G [auth A], H [auth B], I [auth D]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.242 
• R-Value Work: 0.218 
• R-Value Observed: 0.219 
• Space Group: F 2 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 228.125	α = 90
b = 228.125	β = 90
c = 228.125	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-05-06 
• Released Date: 2016-09-07 
Deposition Author(s): Asensio, M.A., Sankaran, B., Zwart, P.H., Tullman-Ercek, D.

Revision History  

• Version 1.0: 2016-09-07
  Type: Initial release
  
• Version 1.1: 2016-09-28
  Changes: Database references