3WMD

Crystal structure of epoxide hydrolase MonBI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.999 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Allosteric regulation of epoxide opening cascades by a pair of epoxide hydrolases in monensin biosynthesis

Minami, A.Ose, T.Sato, K.Oikawa, A.Kuroki, K.Maenaka, K.Oguri, H.Oikawa, H.

(2014) Acs Chem.Biol. 9: 562-569

  • DOI: 10.1021/cb4006485

  • PubMed Abstract: 
  • Multistep catalysis of epoxide hydrolase/cyclase in the epoxide opening cascade is an intriguing issue in polyether biosynthesis. A pair of structurally homologous epoxide hydrolases was found in gene clusters of ionophore polyethers. In the epoxide ...

    Multistep catalysis of epoxide hydrolase/cyclase in the epoxide opening cascade is an intriguing issue in polyether biosynthesis. A pair of structurally homologous epoxide hydrolases was found in gene clusters of ionophore polyethers. In the epoxide opening reactions with MonBI and MonBII involved in monensin biosynthesis, we found that MonBII and catalytically inactive MonBI mutant catalyzed two-step reactions of bisepoxide substrate analogue to afford bicyclic product although MonBII alone catalyzed only the first cyclization. The X-ray crystal structure of MonBI dimers suggested the importance of the KSD motif in MonBI/MonBI interaction, which was further supported by gel filtration chromatography of wild-type MonBI and mutant MonBI. The involvement of the KSD motif in heterodimer formation was confirmed by in vitro assay. Direct evidence of MonBI/MonBII interaction was obtained by native mass spectrometry. Its dissociation constant was determined as 2.21 × 10(-5) M by surface plasmon resonance. Our results suggested the involvement of an allosteric regulation mechanism by MonBI/MonBII interaction in monensin skeletal construction.


    Organizational Affiliation

    Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0810, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable monensin biosynthesis isomerase
A, B
160Streptomyces cinnamonensisMutation(s): 0 
Gene Names: monBI
Find proteins for Q846W7 (Streptomyces cinnamonensis)
Go to UniProtKB:  Q846W7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.999 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 38.784α = 90.00
b = 56.610β = 90.00
c = 106.973γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-15
    Type: Initial release
  • Version 1.1: 2014-01-29
    Type: Experimental preparation
  • Version 1.2: 2014-03-05
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Refinement description