2WDA

The X-ray structure of the Streptomyces coelicolor A3 Chondroitin AC Lyase in Complex with Chondroitin sulphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of a Family 8 Polysaccharide Lyase Reveal Open and Highly Occluded Substrate-Binding Cleft Conformations.

Elmabrouk, Z.H.Vincent, F.Zhang, M.Smith, N.L.Turkenburg, J.P.Charnock, S.J.Black, G.W.Taylor, E.J.

(2011) Proteins 79: 965

  • DOI: 10.1002/prot.22938
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial enzymatic degradation of glycosaminoglycans such as hyaluronan and chondroitin is facilitated by polysaccharide lyases. Family 8 polysaccharide lyase (PL8) enzymes contain at least two domains: one predominantly composed of α-helices, the α ...

    Bacterial enzymatic degradation of glycosaminoglycans such as hyaluronan and chondroitin is facilitated by polysaccharide lyases. Family 8 polysaccharide lyase (PL8) enzymes contain at least two domains: one predominantly composed of α-helices, the α-domain, and another predominantly composed of β-sheets, the β-domain. Simulation flexibility analyses indicate that processive exolytic cleavage of hyaluronan, by PL8 hyaluronate lyases, is likely to involve an interdomain shift, resulting in the opening/closing of the substrate-binding cleft between the α- and β-domains, facilitating substrate translocation. Here, the Streptomyces coelicolor A3(2) PL8 enzyme was recombinantly expressed in and purified from Escherichia coli and biochemically characterized as a hyaluronate lyase. By using X-ray crystallography its structure was solved in complex with hyaluronan and chondroitin disaccharides. These findings show key catalytic interactions made by the different substrates, and on comparison with all other PL8 structures reveals that the substrate-binding cleft of the S. coelicolor enzyme is highly occluded. A third structure of the enzyme, harboring a mutation of the catalytic tyrosine, created via site-directed mutagenesis, interestingly revealed an interdomain shift that resulted in the opening of the substrate-binding cleft. These results add further support to the proposed processive mechanism of action of PL8 hyaluronate lyases and may indicate that the mechanism of action is likely to be universally used by PL8 hyaluronate lyases.


    Organizational Affiliation

    Department of Biomedical Sciences, School of Life Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PUTATIVE SECRETED LYASE
A
765Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145)Mutation(s): 0 
Find proteins for O86516 (Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145))
Go to UniProtKB:  O86516
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT

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Download CCD File 
A
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 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
L42
Query on L42

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Download CCD File 
A
2-(acetylamino)-2-deoxy-3-O-(4-deoxy-alpha-L-threo-hex-4-enopyranuronosyl)-4-O-sulfo-beta-D-galactopyranose
C14 H21 N O14 S
BWBRFVRXCBBDEH-MUODBDBBSA-N
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.149 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 140.508α = 90.00
b = 140.508β = 90.00
c = 100.764γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
PHASERphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-04-21
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance