2QUD

PP7 Coat Protein Dimer

• PDB DOI: https://doi.org/10.2210/pdb2QUD/pdb

• Classification: RNA BINDING PROTEIN
• Organism(s): Pseudomonas phage PP7
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2007-08-04 Released: 2007-12-18 
• Deposition Author(s): Chao, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.197 
• R-Value Work: 0.157 
• R-Value Observed: 0.159 

Starting Model: experimental

Literature

Structural basis for the coevolution of a viral RNA-protein complex.

Chao, J.A., Patskovsky, Y., Almo, S.C., Singer, R.H.

(2008) Nat Struct Mol Biol 15: 103-105

• PubMed: 18066080 
• DOI: https://doi.org/10.1038/nsmb1327
• Primary Citation of Related Structures:  
  2QUD, 2QUX


• PubMed Abstract: 
  

  The cocrystal structure of the PP7 bacteriophage coat protein in complex with its translational operator identifies a distinct mode of sequence-specific RNA recognition when compared to the well-characterized MS2 coat protein-RNA complex. The structure reveals the molecular basis of the PP7 coat protein's ability to selectively bind its cognate RNA, and it demonstrates that the conserved beta-sheet surface is a flexible architecture that can evolve to recognize diverse RNA hairpins.

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Organizational Affiliation: 

Department of Anatomy, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, New York 10461, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 27.33 kDa 
• Atom Count: 2,363 
• Modelled Residue Count: 242 
• Deposited Residue Count: 250 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Coat protein	A, B	125	Pseudomonas phage PP7	Mutation(s): 0  Gene Names: PP7 Coat Protein
UniProt
Find proteins for P03630 (Pseudomonas phage PP7) Explore P03630  Go to UniProtKB:  P03630

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	C [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.197 
• R-Value Work: 0.157 
• R-Value Observed: 0.159 
• Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 154.985	α = 90
b = 154.985	β = 90
c = 31.631	γ = 120

Software Package:

Software Name	Purpose
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-12-18 
Deposition Author(s): Chao, J.A.

Revision History  

• Version 1.0: 2007-12-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.2: 2017-08-02
  Changes: Refinement description, Source and taxonomy
• Version 1.3: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description