4CD6

The structure of GH113 beta-mannanase AaManA from Alicyclobacillus acidocaldarius in complex with ManIFG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.147 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Combined Inhibitor Free-Energy Landscape and Structural Analysis Reports on the Mannosidase Conformational Coordinate.

Williams, R.J.Iglesias-Fernandez, J.Stepper, J.Jackson, A.Thompson, A.J.Lowe, E.C.White, J.M.Gilbert, H.J.Rovira, C.Davies, G.J.Williams, S.J.

(2014) Angew Chem Int Ed Engl 53: 1087

  • DOI: 10.1002/anie.201308334
  • Primary Citation of Related Structures:  
    4CD4, 4CD5, 4CD6, 4CD7, 4CD8

  • PubMed Abstract: 
  • Mannosidases catalyze the hydrolysis of a diverse range of polysaccharides and glycoconjugates, and the various sequence-based mannosidase families have evolved ingenious strategies to overcome the stereoelectronic challenges of mannoside chemistry. Using a combination of computational chemistry, inhibitor design and synthesis, and X-ray crystallography of inhibitor/enzyme complexes, it is demonstrated that mannoimidazole-type inhibitors are energetically poised to report faithfully on mannosidase transition-state conformation, and provide direct evidence for the conformational itinerary used by diverse mannosidases, including β-mannanases from families GH26 and GH113 ...

    Mannosidases catalyze the hydrolysis of a diverse range of polysaccharides and glycoconjugates, and the various sequence-based mannosidase families have evolved ingenious strategies to overcome the stereoelectronic challenges of mannoside chemistry. Using a combination of computational chemistry, inhibitor design and synthesis, and X-ray crystallography of inhibitor/enzyme complexes, it is demonstrated that mannoimidazole-type inhibitors are energetically poised to report faithfully on mannosidase transition-state conformation, and provide direct evidence for the conformational itinerary used by diverse mannosidases, including β-mannanases from families GH26 and GH113. Isofagomine-type inhibitors are poor mimics of transition-state conformation, owing to the high energy barriers that must be crossed to attain mechanistically relevant conformations, however, these sugar-shaped heterocycles allow the acquisition of ternary complexes that span the active site, thus providing valuable insight into active-site residues involved in substrate recognition.


    Organizational Affiliation

    School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Vic 3010 (Australia).



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENDO-BETA-1,4-MANNANASEA320Alicyclobacillus acidocaldariusMutation(s): 0 
EC: 3.2.1.78
UniProt
Find proteins for A5H1I6 (Alicyclobacillus acidocaldarius)
Explore A5H1I6 
Go to UniProtKB:  A5H1I6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA5H1I6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BMA
Query on BMA

Download Ideal Coordinates CCD File 
C [auth A]beta-D-mannopyranose
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
IFM
Query on IFM

Download Ideal Coordinates CCD File 
B [auth A]5-HYDROXYMETHYL-3,4-DIHYDROXYPIPERIDINE
C6 H13 N O3
QPYJXFZUIJOGNX-HSUXUTPPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.92α = 90
b = 76.16β = 90
c = 93.73γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-02
    Type: Initial release
  • Version 1.1: 2015-07-15
    Changes: Non-polymer description
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Other, Structure summary