Formylmethanofuran:tetrahydromethanopterin formyltransferase from Archaeoglobus fulgidus

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 

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This is version 1.4 of the entry. See complete history


Crystal structures and enzymatic properties of three formyltransferases from archaea: environmental adaptation and evolutionary relationship.

Mamat, B.Roth, A.Grimm, C.Ermler, U.Tziatzios, C.Schubert, D.Thauer, R.K.Shima, S.

(2002) Protein Sci 11: 2168-2178

  • DOI: https://doi.org/10.1110/ps.0211002
  • Primary Citation of Related Structures:  
    1M5H, 1M5S

  • PubMed Abstract: 

    Formyltransferase catalyzes the reversible formation of formylmethanofuran from N(5)-formyltetrahydromethanopterin and methanofuran, a reaction involved in the C1 metabolism of methanogenic and sulfate-reducing archaea. The crystal structure of the homotetrameric enzyme from Methanopyrus kandleri (growth temperature optimum 98 degrees C) has recently been solved at 1.65 A resolution. We report here the crystal structures of the formyltransferase from Methanosarcina barkeri (growth temperature optimum 37 degrees C) and from Archaeoglobus fulgidus (growth temperature optimum 83 degrees C) at 1.9 A and 2.0 A resolution, respectively. Comparison of the structures of the three enzymes revealed very similar folds. The most striking difference found was the negative surface charge, which was -32 for the M. kandleri enzyme, only -8 for the M. barkeri enzyme, and -11 for the A. fulgidus enzyme. The hydrophobic surface fraction was 50% for the M. kandleri enzyme, 56% for the M. barkeri enzyme, and 57% for the A. fulgidus enzyme. These differences most likely reflect the adaptation of the enzyme to different cytoplasmic concentrations of potassium cyclic 2,3-diphosphoglycerate, which are very high in M. kandleri (>1 M) and relatively low in M. barkeri and A. fulgidus. Formyltransferase is in a monomer/dimer/tetramer equilibrium that is dependent on the salt concentration. Only the dimers and tetramers are active, and only the tetramers are thermostable. The enzyme from M. kandleri is a tetramer, which is active and thermostable only at high concentrations of potassium phosphate (>1 M) or potassium cyclic 2,3-diphosphoglycerate. Conversely, the enzyme from M. barkeri and A. fulgidus already showed these properties, activity and stability, at much lower concentrations of these strong salting-out salts.

  • Organizational Affiliation

    Max-Planck-Institut für Biophysik, D-60528 Frankfurt am Main, Germany Institut für Biophysik der Johann Wolfgang Goethe-Universität, D-60590 Frankfurt am Main, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Formylmethanofuran--tetrahydromethanopterin formyltransferase
A, B, C, D, E
A, B, C, D, E, F, G, H
297Archaeoglobus fulgidusMutation(s): 0 
Find proteins for O28076 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16))
Explore O28076 
Go to UniProtKB:  O28076
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO28076
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on K

Download Ideal Coordinates CCD File 
AA [auth G]
BA [auth G]
CA [auth G]
DA [auth H]
EA [auth H]
AA [auth G],
BA [auth G],
CA [auth G],
DA [auth H],
EA [auth H],
FA [auth H],
I [auth A],
J [auth A],
K [auth A],
L [auth B],
M [auth B],
N [auth B],
O [auth C],
P [auth C],
Q [auth C],
R [auth D],
S [auth D],
T [auth D],
U [auth E],
V [auth E],
W [auth E],
X [auth F],
Y [auth F],
Z [auth F]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.1α = 90.1
b = 81.81β = 110.04
c = 99.1γ = 93.75
Software Package:
Software NamePurpose
DENZOdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-07-26
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-04-03
    Changes: Refinement description