4EIS

Structural basis for substrate targeting and catalysis by fungal polysaccharide monooxygenases (PMO-3)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.37 Å
  • R-Value Free: 0.149 
  • R-Value Work: 0.116 
  • R-Value Observed: 0.118 

wwPDB Validation 3D Report Full Report



Literature

Structural basis for substrate targeting and catalysis by fungal polysaccharide monooxygenases.

Li, X.Beeson, W.T.Phillips, C.M.Marletta, M.A.Cate, J.H.

(2012) Structure 20: 1051-1061

  • DOI: 10.1016/j.str.2012.04.002
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The use of cellulases remains a major cost in the production of renewable fuels and chemicals from lignocellulosic biomass. Fungi secrete copper-dependent polysaccharide monooxygenases (PMOs) that oxidatively cleave crystalline cellulose and improve ...

    The use of cellulases remains a major cost in the production of renewable fuels and chemicals from lignocellulosic biomass. Fungi secrete copper-dependent polysaccharide monooxygenases (PMOs) that oxidatively cleave crystalline cellulose and improve the effectiveness of cellulases. However, the means by which PMOs recognize and cleave their substrates in the plant cell wall remain unclear. Here, we present structures of Neurospora crassa PMO-2 and PMO-3 at 1.10 and 1.37 Å resolution, respectively. In the structures, dioxygen species are found in the active sites, consistent with the proposed cleavage mechanism. Structural and sequence comparisons between PMOs also reveal that the enzyme substrate-binding surfaces contain highly varied aromatic amino acid and glycosylation positions. The structures reported here provide evidence for a wide range of PMO substrate recognition patterns in the plant cell wall, including binding modes that traverse multiple glucan chains.


    Organizational Affiliation

    California Institute for Quantitative Biosciences, University of California, Berkeley, CA 94720, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
polysaccharide monooxygenase-3A225Neurospora crassa OR74AMutation(s): 0 
Gene Names: NCU07898
Find proteins for Q7SA19 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore Q7SA19 
Go to UniProtKB:  Q7SA19
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
polysaccharide monooxygenase-3B225Neurospora crassa OR74AMutation(s): 0 
Gene Names: NCU07898
Find proteins for Q7SA19 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore Q7SA19 
Go to UniProtKB:  Q7SA19
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Oligosaccharides
Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
2 N-Glycosylation
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU
Query on CU

Download CCD File 
A, B
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
PER
Query on PER

Download CCD File 
A
PEROXIDE ION
O2
ANAIPYUSIMHBEL-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
DAH
Query on DAH
AL-PEPTIDE LINKINGC9 H11 N O4PHE
HIC
Query on HIC
AL-PEPTIDE LINKINGC7 H11 N3 O2HIS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.37 Å
  • R-Value Free: 0.149 
  • R-Value Work: 0.116 
  • R-Value Observed: 0.118 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.74α = 90
b = 77.89β = 90.02
c = 82.05γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
MOSFLMdata reduction
SCALAdata scaling
PHASESphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-23
    Type: Initial release
  • Version 1.1: 2012-06-27
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary