1F36

THE CRYSTAL STRUCTURE OF FIS MUTANT K36E REVEALS THAT THE TRANSACTIVATION REGION OF THE FIS PROTEIN CONTAINS EXTENDED MOBILE BETA-HAIRPIN ARMS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The transactivation region of the fis protein that controls site-specific DNA inversion contains extended mobile beta-hairpin arms.

Safo, M.K.Yang, W.Z.Corselli, L.Cramton, S.E.Yuan, H.S.Johnson, R.C.

(1997) EMBO J. 16: 6860-6873

  • DOI: 10.1093/emboj/16.22.6860

  • PubMed Abstract: 
  • The Fis protein regulates site-specific DNA inversion catalyzed by a family of DNA invertases when bound to a cis-acting recombinational enhancer. As is often found for transactivation domains, previous crystal structures have failed to resolve the c ...

    The Fis protein regulates site-specific DNA inversion catalyzed by a family of DNA invertases when bound to a cis-acting recombinational enhancer. As is often found for transactivation domains, previous crystal structures have failed to resolve the conformation of the N-terminal inversion activation region within the Fis dimer. A new crystal form of a mutant Fis protein now reveals that the activation region contains two beta-hairpin arms that protrude over 20 A from the protein core. Saturation mutagenesis identified the regulatory and structurally important amino acids. The most critical activating residues are located near the tips of the beta-arms. Disulfide cross-linking between the beta-arms demonstrated that they are highly flexible in solution and that efficient inversion activation can occur when the beta-arms are covalently linked together. The emerging picture for this regulatory motif is that contacts with the recombinase at the tip of the mobile beta-arms activate the DNA invertase in the context of an invertasome complex.


    Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan 11529, Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FIS
A, B
98Escherichia coli (strain K12)Gene Names: fis
Find proteins for P0A6R3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6R3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.222 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 51.900α = 90.00
b = 51.900β = 90.00
c = 294.930γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
MSCdata reduction
X-PLORrefinement
MSCdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1997-06-20 
  • Released Date: 1997-12-24 
  • Deposition Author(s): Safo, M.K., Yuan, H.S.

Revision History 

  • Version 1.0: 1997-12-24
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance