4NL4

PriA Helicase Bound to ADP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural mechanisms of PriA-mediated DNA replication restart.

Bhattacharyya, B.George, N.P.Thurmes, T.M.Zhou, R.Jani, N.Wessel, S.R.Sandler, S.J.Ha, T.Keck, J.L.

(2014) Proc.Natl.Acad.Sci.USA 111: 1373-1378

  • DOI: 10.1073/pnas.1318001111
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Collisions between cellular DNA replication machinery (replisomes) and damaged DNA or immovable protein complexes can dissociate replisomes before the completion of replication. This potentially lethal problem is resolved by cellular "replication res ...

    Collisions between cellular DNA replication machinery (replisomes) and damaged DNA or immovable protein complexes can dissociate replisomes before the completion of replication. This potentially lethal problem is resolved by cellular "replication restart" reactions that recognize the structures of prematurely abandoned replication forks and mediate replisomal reloading. In bacteria, this essential activity is orchestrated by the PriA DNA helicase, which identifies replication forks via structure-specific DNA binding and interactions with fork-associated ssDNA-binding proteins (SSBs). However, the mechanisms by which PriA binds replication fork DNA and coordinates subsequent replication restart reactions have remained unclear due to the dearth of high-resolution structural information available for the protein. Here, we describe the crystal structures of full-length PriA and PriA bound to SSB. The structures reveal a modular arrangement for PriA in which several DNA-binding domains surround its helicase core in a manner that appears to be poised for binding to branched replication fork DNA structures while simultaneously allowing complex formation with SSB. PriA interaction with SSB is shown to modulate SSB/DNA complexes in a manner that exposes a potential replication initiation site. From these observations, a model emerges to explain how PriA links recognition of diverse replication forks to replication restart.


    Organizational Affiliation

    Department of Biomolecular Chemistry, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53706.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Primosome assembly protein PriA
H
747Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578)Mutation(s): 0 
Gene Names: priA
EC: 3.6.4.-
Find proteins for A6TGC5 (Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578))
Go to UniProtKB:  A6TGC5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
H
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
H
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.218 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 85.433α = 90.00
b = 85.433β = 90.00
c = 111.682γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SHARPphasing
ADSCdata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-08
    Type: Initial release
  • Version 1.1: 2014-02-12
    Type: Database references
  • Version 1.2: 2015-05-27
    Type: Refinement description