4JX9

Crystal structure of the complex of peptidyl t-RNA hydrolase from Acinetobacter baumannii with uridine at 1.4A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

The Mode of Inhibitor Binding to Peptidyl-tRNA Hydrolase: Binding Studies and Structure Determination of Unbound and Bound Peptidyl-tRNA Hydrolase from Acinetobacter baumannii

Kaushik, S.Singh, N.Yamini, S.Singh, A.Sinha, M.Arora, A.Kaur, P.Sharma, S.Singh, T.P.

(2013) PLoS One 8: e67547-e67547

  • DOI: https://doi.org/10.1371/journal.pone.0067547
  • Primary Citation of Related Structures:  
    4FOP, 4FOT, 4HOY, 4IKO, 4JWK, 4JX9, 4JY7

  • PubMed Abstract: 

    The incidences of infections caused by an aerobic Gram-negative bacterium, Acinetobacter baumannii are very common in hospital environments. It usually causes soft tissue infections including urinary tract infections and pneumonia. It is difficult to treat due to acquired resistance to available antibiotics is well known. In order to design specific inhibitors against one of the important enzymes, peptidyl-tRNA hydrolase from Acinetobacter baumannii, we have determined its three-dimensional structure. Peptidyl-tRNA hydrolase (AbPth) is involved in recycling of peptidyl-tRNAs which are produced in the cell as a result of premature termination of translation process. We have also determined the structures of two complexes of AbPth with cytidine and uridine. AbPth was cloned, expressed and crystallized in unbound and in two bound states with cytidine and uridine. The binding studies carried out using fluorescence spectroscopic and surface plasmon resonance techniques revealed that both cytidine and uridine bound to AbPth at nanomolar concentrations. The structure determinations of the complexes revealed that both ligands were located in the active site cleft of AbPth. The introduction of ligands to AbPth caused a significant widening of the entrance gate to the active site region and in the process of binding, it expelled several water molecules from the active site. As a result of interactions with protein atoms, the ligands caused conformational changes in several residues to attain the induced tight fittings. Such a binding capability of this protein makes it a versatile molecule for hydrolysis of peptidyl-tRNAs having variable peptide sequences. These are the first studies that revealed the mode of inhibitor binding in Peptidyl-tRNA hydrolases which will facilitate the structure based ligand design.


  • Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, New Delhi, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-tRNA hydrolase193Acinetobacter baumannii ATCC 19606 = CIP 70.34 = JCM 6841Mutation(s): 0 
Gene Names: pthHMPREF0010_01329
EC: 3.1.1.29
UniProt
Find proteins for D0C9L6 (Acinetobacter baumannii (strain ATCC 19606 / DSM 30007 / JCM 6841 / CCUG 19606 / CIP 70.34 / NBRC 109757 / NCIMB 12457 / NCTC 12156 / 81))
Explore D0C9L6 
Go to UniProtKB:  D0C9L6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD0C9L6
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
URI
Query on URI

Download Ideal Coordinates CCD File 
B [auth A]URIDINE
C9 H12 N2 O6
DRTQHJPVMGBUCF-XVFCMESISA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
URI PDBBind:  4JX9 Kd: 2.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.945α = 90
b = 65.783β = 90
c = 75.752γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data 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: 2013-06-05
    Type: Initial release
  • Version 1.1: 2013-07-17
    Changes: Database references
  • Version 1.2: 2013-08-14
    Changes: Database references
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description