1REP

CRYSTAL STRUCTURE OF REPLICATION INITIATOR PROTEIN REPE54 OF MINI-F PLASMID COMPLEXED WITH AN ITERON DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystal structure of a prokaryotic replication initiator protein bound to DNA at 2.6 A resolution.

Komori, H.Matsunaga, F.Higuchi, Y.Ishiai, M.Wada, C.Miki, K.

(1999) EMBO J. 18: 4597-4607

  • DOI: 10.1093/emboj/18.17.4597

  • PubMed Abstract: 
  • The initiator protein (RepE) of F factor, a plasmid involved in sexual conjugation in Escherichia coli, has dual functions during the initiation of DNA replication which are determined by whether it exists as a dimer or as a monomer. A RepE monomer f ...

    The initiator protein (RepE) of F factor, a plasmid involved in sexual conjugation in Escherichia coli, has dual functions during the initiation of DNA replication which are determined by whether it exists as a dimer or as a monomer. A RepE monomer functions as a replication initiator, but a RepE dimer functions as an autogenous repressor. We have solved the crystal structure of the RepE monomer bound to an iteron DNA sequence of the replication origin of plasmid F. The RepE monomer consists of topologically similar N- and C-terminal domains related to each other by internal pseudo 2-fold symmetry, despite the lack of amino acid similarities between the domains. Both domains bind to the two major grooves of the iteron (19 bp) with different binding affinities. The C-terminal domain plays the leading role in this binding, while the N-terminal domain has an additional role in RepE dimerization. The structure also suggests that superhelical DNA induced at the origin of plasmid F by four RepEs and one HU dimer has an essential role in the initiation of DNA replication.


    Related Citations: 
    • Crystallization and preliminary X-ray diffraction studies of a replication initiator protein (RepE54) of the mini-F plasmid complexed with iteron DNA
      Komori, H.,Sasai, N.,Matsunaga, F.,Wada, C.,Miki, K.
      (1999) J.Biochem.(Tokyo) 125: 24


    Organizational Affiliation

    Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (REPLICATION INITIATION PROTEIN)
C
251Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: repE (E, rep)
Find proteins for P03856 (Escherichia coli (strain K12))
Go to UniProtKB:  P03856
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*CP*TP*GP*TP*GP*AP*CP*AP*AP*AP*TP*TP*GP*CP*CP*CP*TP*CP*AP*GP*T)-3')A22N/A
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*TP*GP*AP*GP*GP*GP*CP*AP*AP*TP*TP*TP*GP*TP*CP*AP*CP*AP*GP*GP*T)-3')B22N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.213 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 108.435α = 90.00
b = 81.853β = 121.53
c = 73.891γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CCP4phasing
DENZOdata reduction
X-PLORrefinement
CCP4model building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-02-09
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations
  • Version 1.4: 2018-03-14
    Type: Database references