Biological Assembly 1  

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: 64.05 kDa 
• Atom Count: 3,784 
• Modelled Residue Count: 487 
• Deposited Residue Count: 580 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

 1CWP

STRUCTURES OF THE NATIVE AND SWOLLEN FORMS OF COWPEA CHLOROTIC MOTTLE VIRUS DETERMINED BY X-RAY CRYSTALLOGRAPHY AND CRYO-ELECTRON MICROSCOPY

• PDB DOI:  https://doi.org/10.2210/pdb1CWP/pdb
• NDB: PRV005

• Classification: Virus/RNA
• Organism(s): Cowpea chlorotic mottle virus
• Mutation(s): No 


• Deposited: 1995-05-22 Released: 1995-05-22 
• Deposition Author(s): Speir, J.A., Johnson, J.E., Munshi, S., Wang, G., Timothy, S., Baker, T.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Work: 0.310 
• R-Value Observed: 0.310 

Literature

Structures of the native and swollen forms of cowpea chlorotic mottle virus determined by X-ray crystallography and cryo-electron microscopy.

Speir, J.A., Munshi, S., Wang, G., Baker, T.S., Johnson, J.E.

(1995) Structure 3: 63-77

• PubMed: 7743132 
• DOI: https://doi.org/10.1016/s0969-2126(01)00135-6
• Primary Citation of Related Structures:  
  1CWP


• PubMed Abstract: 
  

RNA-protein interactions stabilize many viruses and also the nucleoprotein cores of enveloped animal viruses (e.g. retroviruses). The nucleoprotein particles are frequently pleomorphic and generally unstable due to the lack of strong protein-protein interactions in their capsids. Principles governing their structures are unknown because crystals of such nucleoprotein particles that diffract to high resolution have not previously been produced. Cowpea chlorotic mottle virions (CCMV) are typical of particles stabilized by RNA-protein interactions and it has been found that crystals that diffract beyond 4.5 A resolution are difficult to grow. However, we report here the purification of CCMV with an exceptionally mild procedure and the growth of crystals that diffract X-rays to 3.2 A resolution.

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Related Citations: 

• The 3.2 Angstrom Resolution Structure of the Polymorphic Cowpea Chlorotic Mottle Virus Ribonucleoprotein Particle
  Speir, J.A.
  (1994) Thesis, Purdue University --: --

• Preliminary X-Ray Data Analysis of Crystalline Cowpea Chlorotic Mottle Virus
  Speir, J.A., Munshi, S., Baker, T.S., Johnson, J.E.
  (1993) Virology 193: 234

• A Study of the Self-Assembly Process in a Small Spherical Virus: Formation of Organized Structures from Protein Subunits in Vitro
  Bancroft, J.B., Hills, G.J., Markham, R.
  (1967) Virology 31: 354

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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-1392, USA.

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Coat protein	D [auth A], E [auth B], F [auth C]	190	Cowpea chlorotic mottle virus	Mutation(s): 0  Gene Names: ORF3b
UniProt
Find proteins for P03601 (Cowpea chlorotic mottle virus) Explore P03601  Go to UniProtKB:  P03601

Entity ID: 1
Molecule	Chains	Length	Organism	Image
RNA (5'-R(*AP*UP*AP*U)-3')	A [auth D], C [auth F]	4	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
RNA (5'-R(*AP*U)-3')	B [auth E]	2	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Work: 0.310 
• R-Value Observed: 0.310 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 381.3	α = 90
b = 381.3	β = 90
c = 408.6	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement
PURDUE	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-05-22 
Deposition Author(s): Speir, J.A., Johnson, J.E., Munshi, S., Wang, G., Timothy, S., Baker, T.S.

Revision History  

• Version 1.0: 1995-05-22
  Type: Initial release
  
• Version 1.1: 2008-05-22
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance