Biological Assembly 1  

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

Global Symmetry: Icosahedral - I  (3D View)
Global Stoichiometry: Homo 180-mer - A180 

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

Macromolecule Content

• Total Structure Weight: 53.21 kDa 
• Atom Count: 3561 
• Modelled Residue Count: 415 
• Deposited Residue Count: 425 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

2BNY

MS2 (N87A mutant) - RNA hairpin complex

• PDB DOI: 10.2210/pdb2BNY/pdb
• NDB: PR0245

• Classification: VIRUS
• Organism(s): Escherichia phage MS2
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2005-04-06 Released: 2006-03-22 
• Deposition Author(s): Horn, W.T., Tars, K., Grahn, E., Helgstrand, C., Baron, A.J., Lago, H., Adams, C.J., Peabody, D.S., Phillips, S.E.V., Stonehouse, N.J., Liljas, L., Stockley, P.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.211 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 

Literature

Structural Basis of RNA Binding Discrimination between Bacteriophages Qbeta and MS2.

Horn, W.T., Tars, K., Grahn, E., Helgstrand, C., Baron, A.J., Lago, H., Adams, C.J., Peabody, D.S., Phillips, S.E.V., Stonehouse, N.J., Liljas, L., Stockley, P.G.

(2006) Structure 14: 487

• PubMed: 16531233 
• DOI: 10.1016/j.str.2005.12.006
• Primary Citation of Related Structures:  
  1ZSE, 2B2D, 2B2E, 2B2G, 2BNY, 2BQ5, 2BS0, 2BS1


• PubMed Abstract: 
  

Sequence-specific interactions between RNA stem-loops and coat protein (CP) subunits play vital roles in the life cycles of the RNA bacteriophages, e.g., by allowing translational repression of their replicase cistrons and tagging their own RNA genomes for encapsidation. The CPs of bacteriophages Qbeta and MS2 each discriminate in favor of their cognate translational operators, even in the presence of closely related operators from other phages in vivo. Discrete mutations within the MS2 CP have been shown to relax this discrimination in vitro. We have determined the structures of eight complexes between such mutants and both MS2 and Qbeta stem-loops with X-ray crystallography. In conjunction with previously determined in vivo repression data, the structures enable us to propose the molecular basis for the discrimination mechanism.

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Organizational Affiliation: 

Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom.

Macromolecules

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

Entity ID: 2
Molecule	Chains	Length	Organism	Image
5'-R(*AP*CP*AP*UP*GP*AP*GP*GP*AP*UP *UP*AP*CP*CP*CP*AP*UP*GP*U)-3'	D [auth R], E [auth S]	19	Escherichia phage MS2

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.211 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 288	α = 90
b = 288	β = 90
c = 653	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-04-06 
• Released Date: 2006-03-22 
Deposition Author(s): Horn, W.T., Tars, K., Grahn, E., Helgstrand, C., Baron, A.J., Lago, H., Adams, C.J., Peabody, D.S., Phillips, S.E.V., Stonehouse, N.J., Liljas, L., Stockley, P.G.

Revision History  

• Version 1.0: 2006-03-22
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-17
  Changes: Advisory, Data collection