3CTT

Crystal complex of N-terminal Human Maltase-Glucoamylase with Casuarine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Total syntheses of casuarine and its 6-O-alpha-glucoside: complementary inhibition towards glycoside hydrolases of the GH31 and GH37 families

Cardona, F.Parmeggiani, C.Faggi, E.Bonaccini, C.Gratteri, P.Sim, L.Gloster, T.M.Roberts, S.Davies, G.J.Rose, D.R.Goti, A.

(2009) Chemistry 15: 1627-1636

  • DOI: 10.1002/chem.200801578
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Total synthesis of naturally occurring casuarine (1) and the first total synthesis of casuarine 6-O-alpha-glucoside (2) were achieved through complete stereoselective nitrone cycloaddition, Tamao-Fleming oxidation and selective alpha-glucosylation as ...

    Total synthesis of naturally occurring casuarine (1) and the first total synthesis of casuarine 6-O-alpha-glucoside (2) were achieved through complete stereoselective nitrone cycloaddition, Tamao-Fleming oxidation and selective alpha-glucosylation as key steps. Biological assays of the two compounds proved their strong and selective inhibitory properties towards glucoamylase NtMGAM and trehalase Tre37A, respectively, which place them among the most powerful inhibitors of these enzymes. The structural determination of the complexes of NtMGAM with 1 and of Tre37A with 2 revealed interesting similarities in the catalytic sites of these two enzymes which belong to different families and clans.


    Organizational Affiliation

    Department of Organic Chemistry U. Schiff, Laboratory of Design, Synthesis and Study of Biologically Active Heterocycles, University of Florence, Via della Lastruccia, 13, 50019 Sesto Fiorentino (FI), Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltase-glucoamylase
A
870Homo sapiensMutation(s): 0 
Gene Names: MGAM (MGA, MGAML)
Find proteins for O43451 (Homo sapiens)
Go to Gene View: MGAM
Go to UniProtKB:  O43451
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3CU
Query on 3CU

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Download CCD File 
A
CASUARINE
(1R,2R,3R,6S,7S,7aR)-3-(hydroxymethyl)hexahydro-1H-pyrrolizine-1,2,6,7-tetrol
C8 H15 N O5
AXTGOJVKRHFYBT-XAZAIFFQSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
3CUKi: 450 nM BINDINGMOAD
3CUKi: 450 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 86.692α = 90.00
b = 109.131β = 90.00
c = 109.438γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PDB_EXTRACTdata extraction
PHASERphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-04-14 
  • Released Date: 2009-02-24 
  • Deposition Author(s): Sim, L., Rose, D.R.

Revision History 

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description