1ROP | pdb_00001rop

STRUCTURE OF THE COL*E1 ROP PROTEIN AT 1.7 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1ROP/pdb

• Classification: TRANSCRIPTION REGULATION
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1991-04-02 Released: 1992-07-15 
• Deposition Author(s): Kokkinidis, M., Banner, D.W., Tsernoglou, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Observed: 
  0.182 (Depositor) 

Literature

Structure of the ColE1 rop protein at 1.7 A resolution

Banner, D.W., Kokkinidis, M., Tsernoglou, D.

(1987) J Mol Biology 196: 657-675

• PubMed: 3681971 
• DOI: https://doi.org/10.1016/0022-2836(87)90039-8
• Primary Citation Related Structures: 
  1ROP


• PubMed Abstract: 
  

  Structural details of the Rop protein from plasmid ColE1 are presented, with a description of the X-ray crystal structure determination and refinement at a nominal resolution of 1.7 A. The 63 amino acid protein is a dimer. Each monomer consists almost entirely of two alpha helices, the whole molecule forming a highly regular four-alpha-helix bundle. This may be approximated by a four-stranded rope with a radius of 7.0 A, a left-handed helical twist and a pitch of 172.5 A. The packing constraints for this novel type of coiled-coil structure are given. The protein acts in the control of plasmid replication via regulation of an RNA-RNA interaction in a manner not yet understood in atomic detail.

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Organizational Affiliation: 
• EMBL, Heidelberg, FRG.

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,PQS (software)

Macromolecule Content 

• Total Structure Weight: 7.24 kDa 
• Atom Count: 495 
• Modeled Residue Count: 56 
• Deposited Residue Count: 63 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ROP PROTEIN	A	63	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P03051 (Escherichia coli) Explore P03051  Go to UniProtKB:  P03051

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Observed: 0.182 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.38	α = 90
b = 40.39	β = 105.77
c = 27.73	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1992-07-15 
Deposition Author(s): Kokkinidis, M., Banner, D.W., Tsernoglou, D.

Revision History  

• Version 1.0: 1992-07-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Other