2E4Q

Crystal structure of BphA3 (reduced form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Molecular Mechanism of the Redox-dependent Interaction between NADH-dependent Ferredoxin Reductase and Rieske-type [2Fe-2S] Ferredoxin

Senda, M.Kishigami, S.Kimura, S.Fukuda, M.Ishida, T.Senda, T.

(2007) J Mol Biol 373: 382-400

  • DOI: 10.1016/j.jmb.2007.08.002
  • Primary Citation of Related Structures:  
    2E4P, 2E4Q, 2GQW, 2GR0, 2YVF, 2YVG, 2YVJ

  • PubMed Abstract: 
  • The electron transfer system of the biphenyl dioxygenase BphA, which is derived from Acidovorax sp. (formally Pseudomonas sp.) strain KKS102, is composed of an FAD-containing NADH-ferredoxin reductase (BphA4) and a Rieske-type [2Fe-2S] ferredoxin (BphA3) ...

    The electron transfer system of the biphenyl dioxygenase BphA, which is derived from Acidovorax sp. (formally Pseudomonas sp.) strain KKS102, is composed of an FAD-containing NADH-ferredoxin reductase (BphA4) and a Rieske-type [2Fe-2S] ferredoxin (BphA3). Biochemical studies have suggested that the whole electron transfer process from NADH to BphA3 comprises three consecutive elementary electron-transfer reactions, in which BphA3 and BphA4 interact transiently in a redox-dependent manner. Initially, BphA4 receives two electrons from NADH. The reduced BphA4 then delivers one electron each to the [2Fe-2S] cluster of the two BphA3 molecules through redox-dependent transient interactions. The reduced BphA3 transports the electron to BphA1A2, a terminal oxygenase, to support the activation of dioxygen for biphenyl dihydroxylation. In order to elucidate the molecular mechanisms of the sequential reaction and the redox-dependent interaction between BphA3 and BphA4, we determined the crystal structures of the productive BphA3-BphA4 complex, and of free BphA3 and BphA4 in all the redox states occurring in the catalytic cycle. The crystal structures of these reaction intermediates demonstrated that each elementary electron transfer induces a series of redox-dependent conformational changes in BphA3 and BphA4, which regulate the interaction between them. In addition, the conformational changes induced by the preceding electron transfer seem to induce the next electron transfer. The interplay of electron transfer and induced conformational changes seems to be critical to the sequential electron-transfer reaction from NADH to BphA3.


    Related Citations: 
    • Crystallization and preliminary X-ray analysis of the reduced Rieske-type [2Fe-2S] ferredoxin derived from Pseudomonas sp.strain KKS102
      Senda, M., Kishigami, S., Kimura, S., Senda, T.
      () To be published --: --

    Organizational Affiliation

    Japan Biological Information Research Center, Japan Biological Informatics Consortium, 2-42 Aomi, Koto-ku, Tokyo 135-0064, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Biphenyl dioxygenase ferredoxin subunitA,
B [auth C]
109Pseudomonas sp.Mutation(s): 0 
UniProt
Find proteins for Q52440 (Pseudomonas sp. (strain KKS102))
Explore Q52440 
Go to UniProtKB:  Q52440
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ52440
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FES
Query on FES

Download Ideal Coordinates CCD File 
C [auth A],
D [auth C]
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.71α = 90
b = 49.71β = 90
c = 172.065γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance