3ZH9

Bacillus subtilis DNA clamp loader delta protein (YqeN)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

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This is version 1.1 of the entry. See complete history. 


Literature

Insights Into the Structure and Assembly of the Bacillus Subtilis Clamp-Loader Complex and its Interaction with the Replicative Helicase.

Afonso, J.P., Chintakayala, K., Suwannachart, C., Sedelnikova, S., Giles, K., Hoyes, J.B., Soultanas, P., Rafferty, J.B., Oldham, N.J.

(2013) Nucleic Acids Res 41: 5115

  • DOI: 10.1093/nar/gkt173
  • Primary Citation of Related Structures:  
    3ZH9

  • PubMed Abstract: 

    • The clamp-loader complex plays a crucial role in DNA replication by loading the β-clamp onto primed DNA to be used by the replicative polymerase. Relatively little is known about the stoichiometry, structure and assembly pathway of this complex, and how it interacts with the replicative helicase, in Gram-positive organisms ...

    The clamp-loader complex plays a crucial role in DNA replication by loading the β-clamp onto primed DNA to be used by the replicative polymerase. Relatively little is known about the stoichiometry, structure and assembly pathway of this complex, and how it interacts with the replicative helicase, in Gram-positive organisms. Analysis of full and partial complexes by mass spectrometry revealed that a hetero-pentameric τ3-δ-δ' Bacillus subtilis clamp-loader assembles via multiple pathways, which differ from those exhibited by the Gram-negative model Escherichia coli. Based on this information, a homology model of the B. subtilis τ3-δ-δ' complex was constructed, which revealed the spatial positioning of the full C-terminal τ domain. The structure of the δ subunit was determined by X-ray crystallography and shown to differ from that of E. coli in the nature of the amino acids comprising the τ and δ' binding regions. Most notably, the τ-δ interaction appears to be hydrophilic in nature compared with the hydrophobic interaction in E. coli. Finally, the interaction between τ3 and the replicative helicase DnaB was driven by ATP/Mg(2+) conformational changes in DnaB, and evidence is provided that hydrolysis of one ATP molecule by the DnaB hexamer is sufficient to stabilize its interaction with τ3.

    Organizational Affiliation: 

    School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DELTAA [auth B]347Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: yqeN, BSU25560
EC: 2.7.7.7
Find proteins for P54459 (Bacillus subtilis (strain 168))
Explore P54459 
Go to UniProtKB:  P54459
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.6α = 90
b = 81.6β = 90
c = 157.67γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-03
    Type: Initial release
  • Version 1.1: 2013-05-22
    Changes: Database references