1XDL

Structure of human aldolase B associated with hereditary fructose intolerance (A149P), at 277K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.349 
  • R-Value Work: 0.304 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the thermolabile mutant aldolase B, A149P: molecular basis of hereditary fructose intolerance.

Malay, A.D.Allen, K.N.Tolan, D.R.

(2005) J.Mol.Biol. 347: 135-144

  • DOI: 10.1016/j.jmb.2005.01.008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Hereditary fructose intolerance (HFI) is a potentially lethal inborn error in metabolism caused by mutations in the aldolase B gene, which is critical for gluconeogenesis and fructose metabolism. The most common mutation, which accounts for 53% of HF ...

    Hereditary fructose intolerance (HFI) is a potentially lethal inborn error in metabolism caused by mutations in the aldolase B gene, which is critical for gluconeogenesis and fructose metabolism. The most common mutation, which accounts for 53% of HFI alleles identified worldwide, results in substitution of Pro for Ala at position 149. Structural and functional investigations of human aldolase B with the A149P substitution (AP-aldolase) have shown that the mutation leads to losses in thermal stability, quaternary structure, and activity. X-ray crystallography is used to reveal the structural basis of these perturbations. Crystals of AP-aldolase are grown at two temperatures (4 degrees C and 18 degrees C), and the structure solved to 3.0 angstroms resolution, using the wild-type structure as the phasing model. The structures reveal that the single residue substitution, A149P, causes molecular disorder around the site of mutation (residues 148-159), which is propagated to three adjacent beta-strand and loop regions (residues 110-129, 189-199, 235-242). Disorder in the 110-129-loop region, which comprises one subunit-subunit interface, provides an explanation for the disrupted quaternary structure and thermal instability. Greater structural perturbation, particularly at a Glu189-Arg148 salt bridge in the active-site architecture, is observed in the structure determined at 18 degrees C, which could explain the temperature-dependent loss in activity. The disorder revealed in these structures is far greater than that predicted by homology modeling and underscores the difficulties in predicting perturbations of protein structure and function by homology modeling alone. The AP-aldolase structure reveals the molecular basis of a hereditary disease and represents one of only a few structures known for mutant proteins at the root of the thousands of other inherited disorders.


    Related Citations: 
    • The temperature dependence of activity and structure for the most prevalent mutant aldolase B associated with hereditary fructose intolerance
      Malay, A.D.,Procious, S.L.,Tolan, D.R.
      (2002) Arch.Biochem.Biophys. 408: 295


    Organizational Affiliation

    Biology Department, Boston University, Boston, MA 02215, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fructose-bisphosphate aldolase B
A, B, C, D, W, X, Y, Z
365Homo sapiensMutation(s): 1 
Gene Names: ALDOB (ALDB)
EC: 4.1.2.13
Find proteins for P05062 (Homo sapiens)
Go to Gene View: ALDOB
Go to UniProtKB:  P05062
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, W, X, Y
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.349 
  • R-Value Work: 0.304 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 153.483α = 90.00
b = 153.513β = 90.00
c = 186.479γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance