1B79

N-TERMINAL DOMAIN OF DNA REPLICATION PROTEIN DNAB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.263 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the N-terminal domain of the DnaB hexameric helicase.

Fass, D.Bogden, C.E.Berger, J.M.

(1999) Structure 7: 691-698

  • DOI: 10.1016/s0969-2126(99)80090-2
  • Primary Citation of Related Structures:  
    1B79

  • PubMed Abstract: 
  • The hexameric helicase DnaB unwinds the DNA duplex at the Escherichia coli chromosome replication fork. Although the mechanism by which DnaB both couples ATP hydrolysis to translocation along DNA and denatures the duplex is unknown, a change in the quaternary structure of the protein involving dimerization of the N-terminal domain has been observed and may occur during the enzymatic cycle ...

    The hexameric helicase DnaB unwinds the DNA duplex at the Escherichia coli chromosome replication fork. Although the mechanism by which DnaB both couples ATP hydrolysis to translocation along DNA and denatures the duplex is unknown, a change in the quaternary structure of the protein involving dimerization of the N-terminal domain has been observed and may occur during the enzymatic cycle. This N-terminal domain is required both for interaction with other proteins in the primosome and for DnaB helicase activity. Knowledge of the structure of this domain may contribute to an understanding of its role in DnaB function.


    Organizational Affiliation

    Whitehead Institute, Cambridge, Massachusetts 02142, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DnaB HelicaseA, B, C, D119Escherichia coliMutation(s): 0 
EC: 3.6.1 (PDB Primary Data), 3.6.4.12 (UniProt)
UniProt
Find proteins for P0ACB0 (Escherichia coli (strain K12))
Explore P0ACB0 
Go to UniProtKB:  P0ACB0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.263 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.3α = 90
b = 66.4β = 93.8
c = 107γ = 90
Software Package:
Software NamePurpose
SHARPphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-06-30
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-12-11
    Changes: Advisory, Derived calculations