4DO2

Crystal Structure of the Rop protein mutant D30P/A31G at resolution 1.4 resolution.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.401 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.159 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural plasticity of 4-alpha-helical bundles exemplified by the puzzle-like molecular assembly of the Rop protein.

Amprazi, M.Kotsifaki, D.Providaki, M.Kapetaniou, E.G.Fellas, G.Kyriazidis, I.Perez, J.Kokkinidis, M.

(2014) Proc.Natl.Acad.Sci.USA 111: 11049-11054

  • DOI: 10.1073/pnas.1322065111

  • PubMed Abstract: 
  • The dimeric Repressor of Primer (Rop) protein, a widely used model system for the study of coiled-coil 4-α-helical bundles, is characterized by a remarkable structural plasticity. Loop region mutations lead to a wide range of topologies, folding stat ...

    The dimeric Repressor of Primer (Rop) protein, a widely used model system for the study of coiled-coil 4-α-helical bundles, is characterized by a remarkable structural plasticity. Loop region mutations lead to a wide range of topologies, folding states, and altered physicochemical properties. A protein-folding study of Rop and several loop variants has identified specific residues and sequences that are linked to the observed structural plasticity. Apart from the native state, native-like and molten-globule states have been identified; these states are sensitive to reducing agents due to the formation of nonnative disulfide bridges. Pro residues in the loop are critical for the establishment of new topologies and molten globule states; their effects, however, can be in part compensated by Gly residues. The extreme plasticity in the assembly of 4-α-helical bundles reflects the capacity of the Rop sequence to combine a specific set of hydrophobic residues into strikingly different hydrophobic cores. These cores include highly hydrated ones that are consistent with the formation of interchain, nonnative disulfide bridges and the establishment of molten globules. Potential applications of this structural plasticity are among others in the engineering of bio-inspired materials.


    Related Citations: 
    • Purification, crystallization and preliminary X-ray diffraction analysis of a variant of the ColE1 Rop protein.
      Ambrazi, M.,Fellas, G.,Kapetaniou, E.G.,Kotsifaki, D.,Providaki, M.,Kokkinidis, M.
      (2008) Acta Crystallogr.,Sect.F 64: 432


    Organizational Affiliation

    Department of Biology, University of Crete, GR 71409 Heraklion, Crete, Greece;Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology, GR 70013 Heraklion, Crete, Greece; and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Regulatory protein rop
A, B
70Escherichia coliGene Names: rop
Find proteins for P03051 (Escherichia coli)
Go to UniProtKB:  P03051
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.401 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.159 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 26.669α = 90.00
b = 38.823β = 100.87
c = 56.644γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data collection
PHASESphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release
  • Version 1.1: 2015-02-04
    Type: Database references, Structure summary