Methanol dehydrogenase from Methylacidiphilum fumariolicum SolV

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 

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This is version 1.3 of the entry. See complete history


Rare earth metals are essential for methanotrophic life in volcanic mudpots.

Pol, A.Barends, T.R.Dietl, A.Khadem, A.F.Eygensteyn, J.Jetten, M.S.Op den Camp, H.J.

(2014) Environ Microbiol 16: 255-264

  • DOI: https://doi.org/10.1111/1462-2920.12249
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Growth of Methylacidiphilum fumariolicum SolV, an extremely acidophilic methanotrophic microbe isolated from an Italian volcanic mudpot, is shown to be strictly dependent on the presence of lanthanides, a group of rare earth elements (REEs) such as lanthanum (Ln), cerium (Ce), praseodymium (Pr) and neodymium (Nd). After fractionation of the bacterial cells and crystallization of the methanol dehydrogenase (MDH), it was shown that lanthanides were essential as cofactor in a homodimeric MDH comparable with one of the MDHs of Methylobacterium extorquens AM1. We hypothesize that the lanthanides provide superior catalytic properties to pyrroloquinoline quinone (PQQ)-dependent MDH, which is a key enzyme for both methanotrophs and methylotrophs. Thus far, all isolated MxaF-type MDHs contain calcium as a catalytic cofactor. The gene encoding the MDH of strain SolV was identified to be a xoxF-ortholog, phylogenetically closely related to mxaF. Analysis of the protein structure and alignment of amino acids showed potential REE-binding motifs in XoxF enzymes of many methylotrophs, suggesting that these may also be lanthanide-dependent MDHs. Our findings will have major environmental implications as metagenome studies showed (lanthanide-containing) XoxF-type MDH is much more prominent in nature than MxaF-type enzymes.

  • Organizational Affiliation

    Department of Microbiology, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Methanol dehydrogenase
A, B
577Methylacidiphilum fumariolicum SolVMutation(s): 0 
Gene Names: mxaFMFUM_190005
EC: (PDB Primary Data), (PDB Primary Data)
Find proteins for I0JWN7 (Methylacidiphilum fumariolicum (strain SolV))
Explore I0JWN7 
Go to UniProtKB:  I0JWN7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupI0JWN7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.7α = 90
b = 75.5β = 97.6
c = 136.4γ = 90
Software Package:
Software NamePurpose
HEIDIdata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-09-18
    Type: Initial release
  • Version 1.1: 2013-10-02
    Changes: Database references
  • Version 1.2: 2014-01-29
    Changes: Database references
  • Version 1.3: 2017-10-25
    Changes: Advisory, Author supporting evidence