2IDO

Structure of the E. coli Pol III epsilon-Hot proofreading complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Escherichia coli DNA polymerase III epsilon-HOT proofreading complex.

Kirby, T.W.Harvey, S.DeRose, E.F.Chalov, S.Chikova, A.K.Perrino, F.W.Schaaper, R.M.London, R.E.Pedersen, L.C.

(2006) J.Biol.Chem. 281: 38466-38471

  • DOI: 10.1074/jbc.M606917200

  • PubMed Abstract: 
  • The epsilon subunit of Escherichia coli DNA polymerase III possesses 3'-exonucleolytic proofreading activity. Within the Pol III core, epsilon is tightly bound between the alpha subunit (DNA polymerase) and subunit. Here, we present the crystal struc ...

    The epsilon subunit of Escherichia coli DNA polymerase III possesses 3'-exonucleolytic proofreading activity. Within the Pol III core, epsilon is tightly bound between the alpha subunit (DNA polymerase) and subunit. Here, we present the crystal structure of epsilon in complex with HOT, the bacteriophage P1-encoded homolog of , at 2.1 A resolution. The epsilon-HOT interface is defined by two areas of contact: an interaction of the previously unstructured N terminus of HOT with an edge of the epsilon central beta-sheet as well as interactions between HOT and the catalytically important helix alpha1-loop-helix alpha2 motif of epsilon. This structure provides insight into how HOT and, by implication, may stabilize the epsilon subunit, thus promoting efficient proofreading during chromosomal replication.


    Organizational Affiliation

    Laboratory of Structural Biology, National Institute of Environmental Health Sciences/NIH, 111 TW Alexander Drive, Research Triangle Park, NC 27709, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase III epsilon subunit
A, C
186Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: dnaQ (mutD)
EC: 2.7.7.7
Find proteins for P03007 (Escherichia coli (strain K12))
Go to UniProtKB:  P03007
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hot protein
B, D
83Escherichia phage P1Mutation(s): 0 
Gene Names: hot
Find proteins for Q71T70 (Escherichia phage P1)
Go to UniProtKB:  Q71T70
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, C
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
C
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
TMP
Query on TMP

Download SDF File 
Download CCD File 
A, C
THYMIDINE-5'-PHOSPHATE
C10 H15 N2 O8 P
GYOZYWVXFNDGLU-XLPZGREQSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.206 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 77.289α = 90.00
b = 77.289β = 90.00
c = 212.978γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
MOLREPphasing
StructureStudiodata collection
CNSrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-14
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance