2NAD

HIGH RESOLUTION STRUCTURES OF HOLO AND APO FORMATE DEHYDROGENASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Observed: 0.114 

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This is version 1.3 of the entry. See complete history


Literature

High resolution structures of holo and apo formate dehydrogenase.

Lamzin, V.S.Dauter, Z.Popov, V.O.Harutyunyan, E.H.Wilson, K.S.

(1994) J Mol Biol 236: 759-785

  • DOI: https://doi.org/10.1006/jmbi.1994.1188
  • Primary Citation of Related Structures:  
    2NAC, 2NAD

  • PubMed Abstract: 

    Three-dimensional crystal structures of holo (ternary complex enzyme-NAD-azide) and apo NAD-dependent dimeric formate dehydrogenase (FDH) from the methylotrophic bacterium Pseudomonas sp. 101 have been refined to R factors of 11.7% and 14.8% at 2.05 and 1.80 A resolution, respectively. The estimated root-mean-square error in atomic co-ordinates is 0.11 A for holo and 0.18 A for apo. X-ray data were collected from single crystals using an imaging plate scanner and synchrotron radiation. In both crystal forms there is a dimer in the asymmetric unit. Both structures show essentially 2-fold molecular symmetry. NAD binding causes movement of the catalytic domain and ordering of the C terminus, where a new helix appears. This completes formation of the enzyme active centre in holo FDH. NAD is bound in the cleft separating the domains and mainly interacts with residues from the co-enzyme binding domain. In apo FDH these residues are held in essentially the same conformation by water molecules occupying the NAD binding region. An azide molecule is located near the point of catalysis, the C4 atom of the nicotinamide moiety of NAD, and overlaps with the proposed formate binding site. There is an extensive channel running from the active site to the protein surface and this is supposed to be used by substrate to reach the active centre after NAD has already bound. The structure of the active site and a hypothetical catalytic mechanism are discussed. Sequence homology of FDH with other NAD-dependent formate dehydrogenases and some D-specific dehydrogenases is discussed on the basis of the FDH three-dimensional structure.


  • Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), DESY, Hamburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NAD-DEPENDENT FORMATE DEHYDROGENASE
A, B
393Pseudomonas sp. 101Mutation(s): 0 
EC: 1.2.1.2 (PDB Primary Data), 1.17.1.9 (UniProt)
UniProt
Find proteins for P33160 (Pseudomonas sp. (strain 101))
Explore P33160 
Go to UniProtKB:  P33160
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33160
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Observed: 0.114 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.97α = 90
b = 113.29β = 90
c = 63.4γ = 90
Software Package:
Software NamePurpose
ARP/wARPmodel building
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-01-26
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations