4RTB

X-ray structure of the FeFe-hydrogenase maturase HydG from Carboxydothermus hydrogenoformans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal Structure of HydG from Carboxydothermus hydrogenoformans: A Trifunctional [FeFe]-Hydrogenase Maturase.

Nicolet, Y.Pagnier, A.Zeppieri, L.Martin, L.Amara, P.Fontecilla-Camps, J.C.

(2015) Chembiochem 16: 397-402

  • DOI: 10.1002/cbic.201402661
  • Primary Citation of Related Structures:  
    4RTB

  • PubMed Abstract: 
  • The structure of the radical S-adenosyl-L-methionine (SAM) [FeFe]-hydrogenase maturase HydG involved in CN(-) /CO synthesis is characterized by two internal tunnels connecting its tyrosine-binding pocket with the external medium and the C-terminal Fe4 S4 cluster-containing region ...

    The structure of the radical S-adenosyl-L-methionine (SAM) [FeFe]-hydrogenase maturase HydG involved in CN(-) /CO synthesis is characterized by two internal tunnels connecting its tyrosine-binding pocket with the external medium and the C-terminal Fe4 S4 cluster-containing region. A comparison with a tryptophan-bound NosL structure suggests that substrate binding causes the closing of the first tunnel and, along with mutagenesis studies, that tyrosine binds to HydG with its amino group well positioned for H-abstraction by SAM. In this orientation the dehydroglycine (DHG) fragment caused by tyrosine Cα-Cβ bond scission can readily migrate through the second tunnel towards the C-terminal domain where both CN(-) and CO are synthesized. Our HydG structure appears to be in a relaxed state with its C-terminal cluster CysX2 CysX22 Cys motif exposed to solvent. A rotation of this domain coupled to Fe4 S4 cluster assembly would bury its putatively reactive unique Fe ion thereby allowing it to interact with DHG.


    Organizational Affiliation

    Metalloproteins Unit, Institut de Biologie Structurale, UMR5075, CEA, CNRS, Université Grenoble Alpes, 71, Avenue des Martyrs, CS 10090, 38044 Grenoble cedex 9 (France). yvain.nicolet@ibs.fr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HydG proteinA477Carboxydothermus hydrogenoformans Z-2901Mutation(s): 0 
Gene Names: CHY_1549
Find proteins for Q3ABV3 (Carboxydothermus hydrogenoformans (strain ATCC BAA-161 / DSM 6008 / Z-2901))
Explore Q3ABV3 
Go to UniProtKB:  Q3ABV3
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.23α = 90
b = 92.23β = 90
c = 167.6γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-28
    Type: Initial release
  • Version 1.1: 2015-02-25
    Changes: Database references