8X9E

Crystal structure of CO dehydrogenase mutant with increased affinity for electron mediators in low PEG concentration


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Identifying a key spot for electron mediator-interaction to tailor CO dehydrogenase's affinity.

Kim, S.M.Kang, S.H.Lee, J.Heo, Y.Poloniataki, E.G.Kang, J.Yoon, H.J.Kong, S.Y.Yun, Y.Kim, H.Ryu, J.Lee, H.H.Kim, Y.H.

(2024) Nat Commun 15: 2732-2732

  • DOI: https://doi.org/10.1038/s41467-024-46909-1
  • Primary Citation of Related Structures:  
    8X9D, 8X9E, 8X9F, 8X9G, 8X9H

  • PubMed Abstract: 

    Fe‒S cluster-harboring enzymes, such as carbon monoxide dehydrogenases (CODH), employ sophisticated artificial electron mediators like viologens to serve as potent biocatalysts capable of cleaning-up industrial off-gases at stunning reaction rates. Unraveling the interplay between these enzymes and their associated mediators is essential for improving the efficiency of CODHs. Here we show the electron mediator-interaction site on ChCODHs (Ch, Carboxydothermus hydrogenoformans) using a systematic approach that leverages the viologen-reactive characteristics of superficial aromatic residues. By enhancing mediator-interaction (R57G/N59L) near the D-cluster, the strategically tailored variants exhibit a ten-fold increase in ethyl viologen affinity relative to the wild-type without sacrificing the turn-over rate (k cat ). Viologen-complexed structures reveal the pivotal positions of surface phenylalanine residues, serving as external conduits for the D-cluster to/from viologen. One variant (R57G/N59L/A559W) can treat a broad spectrum of waste gases (from steel-process and plastic-gasification) containing O 2 . Decoding mediator interactions will facilitate the development of industrially high-efficient biocatalysts encompassing gas-utilizing enzymes.


  • Organizational Affiliation

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea. smkimlife@unist.ac.kr.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Carbon monoxide dehydrogenase 2656Carboxydothermus hydrogenoformans Z-2901Mutation(s): 2 
Gene Names: cooS2
EC: 1.2.7.4
UniProt
Find proteins for Q9F8A8 (Carboxydothermus hydrogenoformans (strain ATCC BAA-161 / DSM 6008 / Z-2901))
Explore Q9F8A8 
Go to UniProtKB:  Q9F8A8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9F8A8
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
XCC
Query on XCC

Download Ideal Coordinates CCD File 
D [auth A]FE(4)-NI(1)-S(4) CLUSTER
Fe4 Ni S4
QGLWBXDZIHZONR-UHFFFAOYSA-N
SF4
Query on SF4

Download Ideal Coordinates CCD File 
B [auth A]IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-UHFFFAOYSA-N
FES
Query on FES

Download Ideal Coordinates CCD File 
C [auth A]FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
F [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
FE
Query on FE

Download Ideal Coordinates CCD File 
E [auth A]FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.083α = 90
b = 75.088β = 111.39
c = 71.14γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentKorea, Republic Of--

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-17
    Type: Initial release
  • Version 1.1: 2024-05-08
    Changes: Database references