1PSU

Structure of the E. coli PaaI protein from the phyenylacetic acid degradation operon


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure, function, and mechanism of the phenylacetate pathway hot dog-fold thioesterase PaaI.

Song, F.Zhuang, Z.Finci, L.Dunaway-Mariano, D.Kniewel, R.Buglino, J.A.Solorzano, V.Wu, J.Lima, C.D.

(2006) J Biol Chem 281: 11028-11038

  • DOI: 10.1074/jbc.M513896200
  • Primary Citation of Related Structures:  
    2FS2, 1PSU

  • PubMed Abstract: 
  • The structure and biochemical function of the hot dog-fold thioesterase PaaI operative in the aerobic phenylacetate degradation pathway are examined. PaaI showed modest activity with phenylacetyl-coenzyme A, suggestive of a role in coenzyme A release from this pathway intermediate in the event of limiting downstream pathway enzymes ...

    The structure and biochemical function of the hot dog-fold thioesterase PaaI operative in the aerobic phenylacetate degradation pathway are examined. PaaI showed modest activity with phenylacetyl-coenzyme A, suggestive of a role in coenzyme A release from this pathway intermediate in the event of limiting downstream pathway enzymes. Minimal activity was observed with aliphatic acyl-coenzyme A thioesters, which ruled out PaaI function in the lower phenylacetate pathway. PaaI was most active with ring-hydroxylated phenylacetyl-coenzyme A thioesters. The x-ray crystal structure of the Escherichia coli thioesterase is reported and analyzed to define the structural basis of substrate recognition and catalysis. The contributions of catalytic and substrate binding residues, thus, identified were examined through steady-state kinetic analysis of site-directed mutant proteins.


    Organizational Affiliation

    Department of Chemistry, University of New Mexico, Albuquerque, New Mexico 87131, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phenylacetic acid degradation protein PaaIA, B140Escherichia coliMutation(s): 5 
Gene Names: paaI
EC: 3.1.2
UniProt
Find proteins for P76084 (Escherichia coli (strain K12))
Explore P76084 
Go to UniProtKB:  P76084
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.847α = 90
b = 69.847β = 90
c = 117.168γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
RESOLVEmodel building
CNSrefinement
RESOLVEphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-07-08
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2013-11-13
    Changes: Database references
  • Version 1.4: 2021-02-03
    Changes: Database references, Derived calculations, Structure summary