1AA6

REDUCED FORM OF FORMATE DEHYDROGENASE H FROM E. COLI

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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Literature

Crystal structure of formate dehydrogenase H: catalysis involving Mo, molybdopterin, selenocysteine, and an Fe4S4 cluster.

Boyington, J.C., Gladyshev, V.N., Khangulov, S.V., Stadtman, T.C., Sun, P.D.

(1997) Science 275: 1305-1308

  • DOI: https://doi.org/10.1126/science.275.5304.1305
  • Primary Citation of Related Structures:  
    1AA6, 1FDI, 1FDO

  • PubMed Abstract: 

    Formate dehydrogenase H from Escherichia coli contains selenocysteine (SeCys), molybdenum, two molybdopterin guanine dinucleotide (MGD) cofactors, and an Fe4S4 cluster at the active site and catalyzes the two-electron oxidation of formate to carbon dioxide. The crystal structures of the oxidized [Mo(VI), Fe4S4(ox)] form of formate dehydrogenase H (with and without bound inhibitor) and the reduced [Mo(IV), Fe4S4(red)] form have been determined, revealing a four-domain alphabeta structure with the molybdenum directly coordinated to selenium and both MGD cofactors. These structures suggest a reaction mechanism that directly involves SeCys140 and His141 in proton abstraction and the molybdenum, molybdopterin, Lys44, and the Fe4S4 cluster in electron transfer.

    • Organizational Affiliation: 

    Laboratory of Molecular Structure, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Rockville, MD 20852, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FORMATE DEHYDROGENASE H715Escherichia coliMutation(s): 0 
Gene Names: FDHF
EC: 1.2.1.2 (PDB Primary Data), 1.17.98.4 (UniProt)
UniProt
Find proteins for P07658 (Escherichia coli (strain K12))
Explore P07658 
Go to UniProtKB:  P07658
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07658
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 146.4α = 90
b = 146.4β = 90
c = 82.7γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-08-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-01-29
    Changes: Structure summary
  • Version 1.4: 2014-08-06
    Changes: Derived calculations, Structure summary
  • Version 1.5: 2024-02-07
    Changes: Data collection, Database references, Derived calculations