3IFA

Human muscle fructose-1,6-bisphosphatase E69Q mutant in complex with AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of E69Q mutant of human muscle fructose-1,6-bisphosphatase

Zarzycki, M.Kolodziejczyk, R.Maciaszczyk-Dziubinska, E.Wysocki, R.Jaskolski, M.Dzugaj, A.

(2011) Acta Crystallogr D Biol Crystallogr 67: 1028-1034

  • DOI: 10.1107/S090744491104385X
  • Primary Citation of Related Structures:  
    3IFA, 3IFC

  • PubMed Abstract: 
  • Human fructose-1,6-bisphosphatase is an allosteric enzyme that is regulated by different ligands. There are only two known isozymes in human tissues: the liver isozyme (the key enzyme of gluconeogenesis), which is regulated by fructose 2,6-bisphosphate, ...

    Human fructose-1,6-bisphosphatase is an allosteric enzyme that is regulated by different ligands. There are only two known isozymes in human tissues: the liver isozyme (the key enzyme of gluconeogenesis), which is regulated by fructose 2,6-bisphosphate, and its muscle counterpart (participating in glycogen synthesis), which is regulated by calcium ions. AMP, which is an allosteric inhibitor of both isozymes, inhibits the muscle isozyme with an I(0.5) that is 35-100 times lower than for the liver isozyme and the reason for this difference remains obscure. In studies aiming at an explanation of the main differences in the regulation of the two isozymes, it has been shown that only one residue, in position 69, regulates the sensitivity towards calcium ions. As a consequence of this finding, an E69Q mutant of the muscle isozyme, which is insensitive to calcium ions while retaining all other kinetic properties resembling the liver isozyme, has been prepared and crystallized. Here, two crystal structures of this mutant enzyme in complex with AMP with and without fructose 6-phosphate (the product of the catalytic reaction) are presented. The AMP binding pattern of the muscle isozyme is quite similar to that of the liver isozyme and the T conformations of the two isozymes are nearly the same.


    Organizational Affiliation

    Institute of Genetics and Microbiology, Faculty of Biological Sciences, University of Wroclaw, ul. Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fructose-1,6-bisphosphatase isozyme 2 ABCD338Homo sapiensMutation(s): 1 
Gene Names: 8789FBP2
EC: 3.1.3.11
Find proteins for O00757 (Homo sapiens)
Explore O00757 
Go to UniProtKB:  O00757
NIH Common Fund Data Resources
PHAROS:  O00757
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMP
Query on AMP

Download Ideal Coordinates CCD File 
A, B, C, D
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
A, B, C, D
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 218.11α = 90
b = 234.26β = 90
c = 71.94γ = 90
Software Package:
Software NamePurpose
MAR345data collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-03-13
    Changes: Database references
  • Version 1.3: 2017-11-01
    Changes: Advisory, Refinement description