6FXA

Dimerization domain of TP901-1 CI repressor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.145 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of the bacteriophage TP901-1 CI repressor dimerization and interaction with DNA.

Rasmussen, K.K.Varming, A.K.Schmidt, S.N.Frandsen, K.E.H.Thulstrup, P.W.Jensen, M.R.Lo Leggio, L.

(2018) FEBS Lett. 592: 1738-1750

  • DOI: 10.1002/1873-3468.13060

  • PubMed Abstract: 
  • Temperate bacteriophages are known for their bistability, which in TP901-1 is controlled by two proteins, CI and MOR. Clear 1 repressor (CI) is hexameric and binds three palindromic operator sites via an N-terminal helix-turn-helix domain (NTD). A di ...

    Temperate bacteriophages are known for their bistability, which in TP901-1 is controlled by two proteins, CI and MOR. Clear 1 repressor (CI) is hexameric and binds three palindromic operator sites via an N-terminal helix-turn-helix domain (NTD). A dimeric form, such as the truncated CI∆58 investigated here, is necessary for high-affinity binding to DNA. The crystal structure of the dimerization region (CTD 1 ) is determined here, showing that it forms a pair of helical hooks. This newly determined structure is used together with the known crystal structure of the CI-NTD and small angle X-ray scattering data, to determine the solution structure of CI∆58 in complex with a palindromic operator site, showing that the two NTDs bind on opposing sides of the DNA helix.


    Organizational Affiliation

    Department of Chemistry, University of Copenhagen, Denmark.,CNRS, CEA, IBS, Université Grenoble Alpes, Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CI
A, B, C, D, E, F
35Lactococcus phage TP901-1Mutation(s): 0 
Gene Names: cI
Find proteins for O48503 (Lactococcus phage TP901-1)
Go to UniProtKB:  O48503
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.145 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.840α = 90.00
b = 42.560β = 90.00
c = 101.160γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Danish Council for Independent ResearchDenmark4002-00107

Revision History 

  • Version 1.0: 2018-05-30
    Type: Initial release
  • Version 1.1: 2018-06-13
    Type: Data collection, Database references