3INZ

H57T Hfq from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structures of mutant forms of Hfq from Pseudomonas aeruginosa reveal the importance of the conserved His57 for the protein hexamer organization.

Moskaleva, O.Melnik, B.Gabdulkhakov, A.Garber, M.Nikonov, S.Stolboushkina, E.Nikulin, A.

(2010) Acta Crystallogr.,Sect.F 66: 760-764

  • DOI: 10.1107/S1744309110017331
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The bacterial Sm-like protein Hfq forms homohexamers both in solution and in crystals. The monomers are organized as a continuous beta-sheet passing through the whole hexamer ring with a common hydrophobic core. Analysis of the Pseudomonas aeruginosa ...

    The bacterial Sm-like protein Hfq forms homohexamers both in solution and in crystals. The monomers are organized as a continuous beta-sheet passing through the whole hexamer ring with a common hydrophobic core. Analysis of the Pseudomonas aeruginosa Hfq (PaeHfq) hexamer structure suggested that solvent-inaccessible intermonomer hydrogen bonds created by conserved amino-acid residues should also stabilize the quaternary structure of the protein. In this work, one such conserved residue, His57, in PaeHfq was replaced by alanine, threonine or asparagine. The crystal structures of His57Thr and His57Ala Hfq were determined and the stabilities of all of the mutant forms and of the wild-type protein were measured. The results obtained demonstrate the great importance of solvent-inaccessible conserved hydrogen bonds between the Hfq monomers in stabilization of the hexamer structure.


    Related Citations: 
    • Structure of Pseudomonas aeruginosa Hfq protein.
      Nikulin, A.,Stolboushkina, E.,Perederina, A.,Vassilieva, I.,Blaesi, U.,Moll, I.,Kachalova, G.,Yokoyama, S.,Vassylyev, D.,Garber, M.,Nikonov, S.
      (2005) Acta Crystallogr.,Sect.D 61: 141


    Organizational Affiliation

    Institute of Protein Research, RAS, Russia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein hfq
A, B, C, D, E, F
82Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 1 
Gene Names: hfq
Find proteins for Q9HUM0 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9HUM0
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A, B, C, D, E, F
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.149 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 61.290α = 90.00
b = 71.160β = 90.00
c = 104.410γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXphasing
XDSdata reduction
PHENIXrefinement
MAR345dtbdata collection
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance