L-Fuculose 1-Phosphate Aldolase from Escherichia coli Mutant S71Q

Experimental Data Snapshot

  • Resolution: 1.66 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.164 

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This is version 1.5 of the entry. See complete history


Structures of L-Fuculose-1-Phosphate Aldolase Mutants Outlining Motions During Catalysis

Joerger, A.C.Mueller-Dieckmann, C.Schulz, G.E.

(2000) J Mol Biol 303: 531

  • DOI: https://doi.org/10.1006/jmbi.2000.4153
  • Primary Citation of Related Structures:  
    1E46, 1E47, 1E48, 1E49, 1E4A, 1E4B, 1E4C

  • PubMed Abstract: 

    The crystal structures of l-fuculose-1-phosphate aldolase (FucA) with and without a ligated analogue of dihydroxyacetone phosphate (DHAP) and of a number of active center mutants have resulted in a model of the catalytic mechanism. This model has now been confirmed by structural analyses of further mutations at the zinc coordination sphere and at the phosphate site. In addition, these mutants have revealed new aspects of the catalysis: the hydroxyl group of Tyr113' (from a neighboring subunit), which sits just outside the zinc coordination sphere, steers DHAP towards a productive binding mode at the zinc ion; Glu73 contacts zinc in between the two ligand positions intended for the DHAP oxygen atoms and thus avoids blocking of these positions by a tetrahedrally coordinated hydroxy ion; the FucA polypeptide does not assume its minimum energy state but oscillates between two states of elevated energy as demonstrated by a mutant in a minimum energy state. The back and forth motion involves a mobile loop connecting the phosphate site with intersubunit motions and thus with the Brownian motion of the solvent. The phosphate group is bound strongly at a given distance to the zinc ion, which prevents the formation of too tight a DHAP:zinc complex. This observation explains our failure to find mutants that accept phosphate-free substitutes for DHAP. The FucA zinc coordination sphere is compared with that of carbonic anhydrase.

  • Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Freiburg im Breisgau, Germany-79104, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
L-FUCULOSE 1-PHOSPHATE ALDOLASEA [auth P]215Escherichia coliMutation(s): 1 
Find proteins for P0AB87 (Escherichia coli (strain K12))
Explore P0AB87 
Go to UniProtKB:  P0AB87
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AB87
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.66 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.164 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.52α = 90
b = 93.52β = 90
c = 42.37γ = 90
Software Package:
Software NamePurpose
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-11-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Data collection
  • Version 1.4: 2017-07-12
    Changes: Derived calculations
  • Version 1.5: 2019-01-30
    Changes: Data collection, Experimental preparation