3HP4

Crystal structure of psychrotrophic esterase EstA from Pseudoalteromonas sp. 643A inhibited by monoethylphosphonate

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of EstA esterase from psychrotrophic Pseudoalteromonas sp. 643A covalently inhibited by monoethylphosphonate.

Brzuszkiewicz, A., Nowak, E., Dauter, Z., Dauter, M., Cieslinski, H., Dlugolecka, A., Kur, J.

(2009) Acta Crystallogr Sect F Struct Biol Cryst Commun 65: 862-865

  • DOI: 10.1107/S1744309109030826
  • Primary Citation of Related Structures:  
    3HP4

  • PubMed Abstract: 

    • The crystal structure of the esterase EstA from the cold-adapted bacterium Pseudoalteromonas sp. 643A was determined in a covalently inhibited form at a resolution of 1.35 A. The enzyme has a typical SGNH hydrolase structure consisting of a single domain containing a five-stranded beta-sheet, with three helices at the convex side and two helices at the concave side of the sheet, and is ornamented with a couple of very short helices at the domain edges ...

    The crystal structure of the esterase EstA from the cold-adapted bacterium Pseudoalteromonas sp. 643A was determined in a covalently inhibited form at a resolution of 1.35 A. The enzyme has a typical SGNH hydrolase structure consisting of a single domain containing a five-stranded beta-sheet, with three helices at the convex side and two helices at the concave side of the sheet, and is ornamented with a couple of very short helices at the domain edges. The active site is located in a groove and contains the classic catalytic triad of Ser, His and Asp. In the structure of the crystal soaked in diethyl p-nitrophenyl phosphate (DNP), the catalytic serine is covalently connected to a phosphonate moiety that clearly has only one ethyl group. This is the only example in the Protein Data Bank of a DNP-inhibited enzyme with covalently bound monoethylphosphate.

    Organizational Affiliation: 

    Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GDSL-esteraseA185Pseudoalteromonas sp. 643AMutation(s): 0 
Gene Names: estA
Find proteins for Q1G1I7 (Pseudoalteromonas sp. 643A)
Explore Q1G1I7 
Go to UniProtKB:  Q1G1I7
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MIR
Query on MIR		AL-PEPTIDE LINKINGC5 H12 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.82α = 90
b = 83.82β = 90
c = 130.95γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
SERGUIdata collection
HKL-2000data reduction
MOLREPphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Source and taxonomy, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description