N-terminal domain of the Bacillus subtilis helicase-loading protein DnaI

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


A novel zinc-binding fold in the helicase interaction domain of the Bacillus subtilis DnaI helicase loader

Loscha, K.V.Jaudzems, K.Ioannou, C.Su, X.C.Hill, F.R.Otting, G.Dixon, N.E.Liepinsh, E.

(2009) Nucleic Acids Res 37: 2395-2404

  • DOI: https://doi.org/10.1093/nar/gkp092
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The helicase loader protein DnaI (the Bacillus subtilis homologue of Escherichia coli DnaC) is required to load the hexameric helicase DnaC (the B. subtilis homologue of E. coli DnaB) onto DNA at the start of replication. While the C-terminal domain of DnaI belongs to the structurally well-characterized AAA+ family of ATPases, the structure of the N-terminal domain, DnaI-N, has no homology to a known structure. Three-dimensional structure determination by nuclear magnetic resonance (NMR) spectroscopy shows that DnaI presents a novel fold containing a structurally important zinc ion. Surface plasmon resonance experiments indicate that DnaI-N is largely responsible for binding of DnaI to the hexameric helicase from B. stearothermophilus, which is a close homologue of the corresponding much less stable B. subtilis helicase.

  • Organizational Affiliation

    Research School of Chemistry, Australian National University, Canberra, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Primosomal protein dnaI106Bacillus subtilisMutation(s): 0 
Gene Names: dnaIytxABSU28980
Find proteins for P06567 (Bacillus subtilis (strain 168))
Explore P06567 
Go to UniProtKB:  P06567
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06567
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-02-26
    Changes: Data collection, Derived calculations, Other
  • Version 1.3: 2023-06-14
    Changes: Database references, Derived calculations, Other