1FIA

CRYSTAL STRUCTURE OF THE FACTOR FOR INVERSION STIMULATION FIS AT 2.0 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the factor for inversion stimulation FIS at 2.0 A resolution.

Kostrewa, D.Granzin, J.Stock, D.Choe, H.W.Labahn, J.Saenger, W.

(1992) J.Mol.Biol. 226: 209-226


  • PubMed Abstract: 
  • The factor for inversion stimulation (FIS) binds as a homodimeric molecule to a loose 15 nucleotide consensus sequence in DNA. It stimulates DNA-related processes, such as DNA inversion and excision, it activates transcription of tRNA and rRNA genes ...

    The factor for inversion stimulation (FIS) binds as a homodimeric molecule to a loose 15 nucleotide consensus sequence in DNA. It stimulates DNA-related processes, such as DNA inversion and excision, it activates transcription of tRNA and rRNA genes and it regulates its own synthesis. FIS crystallizes as a homodimer, with 2 x 98 amino acid residues in the asymmetric unit. The crystal structure was determined with multiple isomorphous replacement and refined to an R-factor of 19.2% against all the 12,719 X-ray data (no sigma-cutoff) extending to 2.0 A resolution. The two monomers are related by a non-crystallographic dyad axis. The structure of the dimer is modular, with the first 23 amino acid residues in molecule M1 and the first 24 in molecule M2 disordered and not "seen" in the electron density. The polypeptide folds into four alpha-helices, with alpha A, alpha A' (amino acid residues 26 to 40) and alpha B, alpha B' (49 to 69) forming the core of the FIS dimer, which is stabilized by hydrophobic forces. To the core are attached "classical" helix-turn-helix motifs, alpha C, alpha D (73 to 81 and 84 to 94) and alpha C', alpha D'. The connections linking the helices are structured by two beta-turns for alpha A/alpha B, and alpha C1 type extensions are observed at the C termini of helices alpha B, alpha C and alpha D. Helices alpha D and alpha D' contain 2 x 6 positive charges; they are separated by 24 A and can bind adjacent major grooves in B-type DNA if it is bent 90 degrees. The modular structure of FIS is also reflected by mutation experiments; mutations in the N-terminal part and alpha A interfere with FIS binding to invertases, and mutations in the helix-turn-helix motif interfere with DNA binding.


    Related Citations: 
    • Three-Dimensional Structure of the E. Coli DNA-Binding Protein FIS
      Kostrewa, D.,Granzin, J.,Koch, C.,Choe, H.-W.,Raghunathan, S.,Wolf, W.,Labahn, J.,Kahmann, R.,Saenger, W.
      (1991) Nature 349: 178
    • Crystallization of the DNA-Binding Escherichia Coli Protein FIS
      Choe, H.-W.,Labahn, J.,Itoh, S.,Koch, C.,Kahmann, R.,Saenger, W.
      (1989) J.Mol.Biol. 208: 209


    Organizational Affiliation

    Institut für Kristallographie, Freie Universität Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FACTOR FOR INVERSION STIMULATION (FIS)
A, B
98Escherichia coli (strain K12)Mutation(s): 0 
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 Å
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 47.390α = 90.00
b = 50.980β = 90.00
c = 79.670γ = 90.00
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other, Structure summary