4IIT

The Phenylacetyl-CoA monooxygenase PaaABC subcomplex with phenylacetyl-CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.3 Å
  • R-Value Free: 0.363 
  • R-Value Work: 0.288 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Family of phenylacetyl-CoA monooxygenases differs in subunit organization from other monooxygenases.

Grishin, A.M.Ajamian, E.Tao, L.Bostina, M.Zhang, L.Trempe, J.F.Menard, R.Rouiller, I.Cygler, M.

(2013) J.Struct.Biol. 184: 147-154

  • DOI: 10.1016/j.jsb.2013.09.012

  • PubMed Abstract: 
  • The phenylacetate degradation pathway is present in a wide range of microbes. A key component of this pathway is the four-subunit phenylacetyl-coenzyme A monooxygenase complex (PA-CoA MO, PaaACBE) that catalyzes the insertion of an oxygen in the arom ...

    The phenylacetate degradation pathway is present in a wide range of microbes. A key component of this pathway is the four-subunit phenylacetyl-coenzyme A monooxygenase complex (PA-CoA MO, PaaACBE) that catalyzes the insertion of an oxygen in the aromatic ring of PA. This multicomponent enzyme represents a new family of monooxygenases. We have previously determined the structure of the PaaAC subcomplex of catalytic (A) and structural (C) subunits and shown that PaaACB form a stable complex. The PaaB subunit is unrelated to the small subunits of homologous monooxygenases and its role and organization of the PaaACB complex is unknown. From low-resolution crystal structure, electron microscopy and small angle X-ray scattering we show that the PaaACB complex forms heterohexamers, with a homodimer of PaaB bridging two PaaAC heterodimers. Modeling the interactions of reductase subunit PaaE with PaaACB suggested that a unique and conserved 'lysine bridge' constellation near the Fe-binding site in the PaaA subunit (Lys68, Glu49, Glu72 and Asp126) may form part of the electron transfer path from PaaE to the iron center. The crystal structure of the PaaA(K68Q/E49Q)-PaaC is very similar to the wild-type enzyme structure, but when combined with the PaaE subunit the mutant showed 20-50 times reduced activity, supporting the functional importance of the 'lysine bridge'.


    Organizational Affiliation

    Department of Biochemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E5, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phenylacetate-CoA oxygenase subunit PaaA
A
320Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578)Gene Names: paaA
Find proteins for A6T8I0 (Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578))
Go to UniProtKB:  A6T8I0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Phenylacetate-CoA oxygenase subunit PaaB
B
95Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578)Gene Names: paaB
Find proteins for A6T8I1 (Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578))
Go to UniProtKB:  A6T8I1
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Phenylacetate-CoA oxygenase subunit PaaC
C
251Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578)Gene Names: paaC
Find proteins for A6T8I2 (Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578))
Go to UniProtKB:  A6T8I2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAQ
Query on FAQ

Download SDF File 
Download CCD File 
A
Phenylacetyl coenzyme A
C29 H42 N7 O17 P3 S
ZIGIFDRJFZYEEQ-CECATXLMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.3 Å
  • R-Value Free: 0.363 
  • R-Value Work: 0.288 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 208.941α = 90.00
b = 208.941β = 90.00
c = 86.081γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
DENZOdata reduction
HKL-2000data scaling
SCALEPACKdata scaling
XDSdata scaling
REFMACrefinement
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-06
    Type: Initial release
  • Version 1.1: 2013-12-25
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description