5UCM

Crystal Structure of Prolyl-tRNA Synthetase from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Characterization and structure determination of prolyl-tRNA synthetase from Pseudomonas aeruginosa and development as a screening platform.

Pena, N.Dranow, D.M.Hu, Y.Escamilla, Y.Bullard, J.M.

(2019) Protein Sci 

  • DOI: 10.1002/pro.3579
  • Primary Citation of Related Structures:  
    5UCM

  • PubMed Abstract: 
  • Pseudomonas aeruginosa is an opportunistic multi-drug resistant pathogen implicated as a causative agent in nosocomial and community acquired bacterial infections. The gene encoding prolyl-tRNA synthetase (ProRS) from P. aeruginosa was overexpressed ...

    Pseudomonas aeruginosa is an opportunistic multi-drug resistant pathogen implicated as a causative agent in nosocomial and community acquired bacterial infections. The gene encoding prolyl-tRNA synthetase (ProRS) from P. aeruginosa was overexpressed in Escherichia coli and the resulting protein was characterized. ProRS was kinetically evaluated and the K M values for interactions with ATP, proline, and tRNA were 154, 122, and 5.5 μM, respectively. The turn-over numbers, k cat obs , for interactions with these substrates were calculated to be 5.5, 6.3, and 0.2 s -1 , respectively. The crystal structure of the α 2 form of P. aeruginosa ProRS was solved to 2.60 Å resolution. The amino acid sequence and X-ray crystal structure of P. aeruginosa ProRS was analyzed and compared with homologs in which the crystal structures have been solved. The amino acids that interact with ATP and proline are well conserved in the active site region and overlay of the crystal structure with ProRS homologs conforms to a similar overall three-dimensional structure. ProRS was developed into a screening platform using scintillation proximity assay (SPA) technology and used to screen 890 chemical compounds, resulting in the identification of two inhibitory compounds, BT06A02 and BT07H05. This work confirms the utility of a screening system based on the functionality of ProRS from P. aeruginosa.


    Organizational Affiliation

    The University of Texas - RGV, Edinburg, Texas 78541.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proline--tRNA ligaseAB579Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: proSPA0956
EC: 6.1.1.15
Find proteins for Q9I502 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I502 
Go to UniProtKB:  Q9I502
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download Ideal Coordinates CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.83α = 90
b = 101.54β = 90
c = 187.24γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
MR-Rosettaphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-22
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Data collection, Database references