3QUI

Crystal structure of Pseudomonas aeruginosa Hfq in complex with ADPNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.217 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Hfq binds ribonucleotides in three different RNA-binding sites.

Murina, V.Lekontseva, N.Nikulin, A.

(2013) Acta Crystallogr D Biol Crystallogr 69: 1504-1513

  • DOI: https://doi.org/10.1107/S090744491301010X
  • Primary Citation of Related Structures:  
    3QUI, 4J5Y, 4J6W, 4J6X, 4J6Y

  • PubMed Abstract: 

    The Hfq protein forms a doughnut-shaped homohexamer that possesses RNA-binding activity. There are two distinct RNA-binding surfaces located on the proximal and the distal sides of the hexamer. The proximal side is involved in the binding of mRNA and small noncoding RNAs (sRNAs), while the distal side has an affinity for A-rich RNA sequences. In this work, the ability of various ribonucleotides to form complexes with Hfq from Pseudomonas aeruginosa has been tested using X-ray crystallography. ATP and ADPNP have been located in the distal R-site, which is a site for poly(A) RNA binding. UTP has been found in the so-called lateral RNA-binding site at the proximal surface. CTP has been found in both the distal R-site and the proximal U-binding site. GTP did not form a complex with Hfq under the conditions tested. The results have demonstrated the power of the crystallographic method for locating ribonucleotides and predicting single-stranded RNA-binding sites on the protein surface.


  • Organizational Affiliation

    Institute of Protein Research, RAS, Institutskaya 4, Pushchino 142290, Moscow Region, Russian Federation.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein hfq
A, B, C, D, E
A, B, C, D, E, F
82Pseudomonas aeruginosaMutation(s): 0 
Gene Names: hfqPA4944
UniProt
Find proteins for Q9HUM0 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HUM0 
Go to UniProtKB:  Q9HUM0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HUM0
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download Ideal Coordinates CCD File 
J [auth D],
K [auth D],
M [auth E]
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
ADP
Query on ADP

Download Ideal Coordinates CCD File 
G [auth A],
H [auth B],
I [auth C]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
ADE
Query on ADE

Download Ideal Coordinates CCD File 
N [auth F]ADENINE
C5 H5 N5
GFFGJBXGBJISGV-UHFFFAOYSA-N
PEG
Query on PEG

Download Ideal Coordinates CCD File 
L [auth D]DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.083α = 90
b = 75.862β = 90
c = 93.437γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-08
    Type: Initial release
  • Version 1.1: 2013-08-28
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description