2FJK

Crystal structure of Fructose-1,6-Bisphosphate Aldolase in Thermus caldophilus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.242 

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This is version 1.2 of the entry. See complete history


Literature

Stereoselectivity of fructose-1,6-bisphosphate aldolase in Thermus caldophilus

Lee, J.H.Bae, J.Kim, D.Choi, Y.Im, Y.J.Koh, S.Kim, J.S.Kim, M.-K.Kang, G.B.Hong, S.-I.Lee, D.-S.Eom, S.H.

(2006) Biochem Biophys Res Commun 347: 616-625

  • DOI: https://doi.org/10.1016/j.bbrc.2006.06.139
  • Primary Citation of Related Structures:  
    2FJK

  • PubMed Abstract: 

    It was recently established that fructose-1,6-bisphosphate (FBP) aldolase (FBA) and tagatose-1,6-bisphosphate (TBP) aldolase (TBA), two class II aldolases, are highly specific for the diastereoselective synthesis of FBP and TBP from glyceraldehyde-3-phosphate (G3P) and dihydroxyacetone phosphate (DHAP), respectively. In this paper, we report on a FBA from the thermophile Thermus caldophilus GK24 (Tca) that produces both FBP and TBP from C(3) substrates. Moreover, the FBP:TBP ratio could be adjusted by manipulating the concentrations of G3P and DHAP. This is the first native FBA known to show dual diastereoselectivity among the FBAs and TBAs characterized thus far. To explain the behavior of this enzyme, the X-ray crystal structure of the Tca FBA in complex with DHAP was determined at 2.2A resolution. It appears that as a result of alteration of five G3P binding residues, the substrate binding cavity of Tca FBA has a greater volume than those in the Escherichia coli FBA-phosphoglycolohydroxamate (PGH) and TBA-PGH complexes. We suggest that this steric difference underlies the difference in the diastereoselectivities of these class II aldolases.


  • Organizational Affiliation

    Department of Life Science, Gwangju Institute of Science and Technology, Republic of Korea.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fructose-bisphosphate aldolase
A, B, C, D
305Thermus caldophilusMutation(s): 8 
EC: 4.1.2.13
UniProt
Find proteins for Q703I2 (Thermus caldophilus)
Explore Q703I2 
Go to UniProtKB:  Q703I2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ703I2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.242 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.9α = 90
b = 113.1β = 90
c = 115.7γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing
CNSrefinement
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance