1GXN

Family 10 polysaccharide lyase from Cellvibrio cellulosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.129 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Convergent Evolution Sheds Light on the Anti-Beta-Elimination Mechanism Common to Family 1 and 10 Polysaccharide Lyases

Charnock, S.J.Brown, I.E.Turkenburg, J.P.Black, G.W.Davies, G.J.

(2002) Proc.Natl.Acad.Sci.USA 99: 12067

  • DOI: 10.1073/pnas.182431199
  • Primary Citation of Related Structures:  1GXM, 1GXO

  • PubMed Abstract: 
  • Enzyme-catalyzed beta-elimination of sugar uronic acids, exemplified by the degradation of plant cell wall pectins, plays an important role in a wide spectrum of biological processes ranging from the recycling of plant biomass through to pathogen vir ...

    Enzyme-catalyzed beta-elimination of sugar uronic acids, exemplified by the degradation of plant cell wall pectins, plays an important role in a wide spectrum of biological processes ranging from the recycling of plant biomass through to pathogen virulence. The three-dimensional crystal structure of the catalytic module of a "family PL-10" polysaccharide lyase, Pel10Acm from Cellvibrio japonicus, solved at a resolution of 1.3 A, reveals a new polysaccharide lyase fold and is the first example of a polygalacturonic acid lyase that does not exhibit the "parallel beta-helix" topology. The "Michaelis" complex of an inactive mutant in association with the substrate trigalacturonate/Ca2+ reveals the catalytic machinery harnessed by this polygalacturonate lyase, which displays a stunning resemblance, presumably through convergent evolution, to the tetragalacturonic acid complex observed for a structurally unrelated polygalacturonate lyase from family PL-1. Common coordination of the -1 and +1 subsite saccharide carboxylate groups by a protein-liganded Ca2+ ion, the positioning of an arginine catalytic base in close proximity to the alpha-carbon hydrogen and numerous other conserved enzyme-substrate interactions, considered in light of mutagenesis data for both families, suggest a generic polysaccharide anti-beta-elimination mechanism.


    Organizational Affiliation

    York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5YW, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PECTATE LYASE
A
332Cellvibrio japonicusGene Names: Pel10A
Find proteins for Q9F7L3 (Cellvibrio japonicus)
Go to UniProtKB:  Q9F7L3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.129 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 106.258α = 90.00
b = 55.137β = 90.00
c = 47.574γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-04
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance