3FY1

The Acidic Mammalian Chitinase catalytic domain in complex with methylallosamidin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.176 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Triad of polar residues implicated in pH specificity of acidic mammalian chitinase.

Olland, A.M.Strand, J.Presman, E.Czerwinski, R.Joseph-McCarthy, D.Krykbaev, R.Schlingmann, G.Chopra, R.Lin, L.Fleming, M.Kriz, R.Stahl, M.Somers, W.Fitz, L.Mosyak, L.

(2009) Protein Sci 18: 569-578

  • DOI: 10.1002/pro.63
  • Primary Citation of Related Structures:  
    3FXY, 3FY1

  • PubMed Abstract: 
  • Acidic mammalian chitinase (AMCase) is a mammalian chitinase that has been implicated in allergic asthma. One of only two active mammalian chinases, AMCase, is distinguished from other chitinases by several unique features. Here, we present the novel structure of the AMCase catalytic domain, both in the apo form and in complex with the inhibitor methylallosamidin, determined to high resolution by X-ray crystallography ...

    Acidic mammalian chitinase (AMCase) is a mammalian chitinase that has been implicated in allergic asthma. One of only two active mammalian chinases, AMCase, is distinguished from other chitinases by several unique features. Here, we present the novel structure of the AMCase catalytic domain, both in the apo form and in complex with the inhibitor methylallosamidin, determined to high resolution by X-ray crystallography. These results provide a structural basis for understanding some of the unique characteristics of this enzyme, including the low pH optimum and the preference for the beta-anomer of the substrate. A triad of polar residues in the second-shell is found to modulate the highly conserved chitinase active site. As a novel target for asthma therapy, structural details of AMCase activity will help guide the future design of specific and potent AMCase inhibitors.


    Organizational Affiliation

    Department of Chemical and Screening Sciences, Structural Biology and Computational Chemistry, Wyeth Research, Cambridge, Massachusetts 02140, USA. aolland@wyeth.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acidic mammalian chitinaseA, B395Homo sapiensMutation(s): 1 
Gene Names: CHIA
EC: 3.2.1.14
Find proteins for Q9BZP6 (Homo sapiens)
Explore Q9BZP6 
Go to UniProtKB:  Q9BZP6
NIH Common Fund Data Resources
PHAROS:  Q9BZP6
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-6-O-methyl-alpha-D-allopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-allopyranoseC, D2 N/A Oligosaccharides Interaction
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMI
Query on AMI

Download Ideal Coordinates CCD File 
E [auth A], F [auth B]ALLOSAMIZOLINE
C9 H16 N2 O4
MKJAYSJDHSEFRI-PVFLNQBWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.688α = 90
b = 89.287β = 90
c = 126.689γ = 90
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2009-01-21 
  • Released Date: 2009-03-10 
  • Deposition Author(s): Olland, A.M.

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary