Crystal structure of apo Cuticle-Degrading Protease (ver112) from Verticillium psalliotae

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 

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The crystal structures of two cuticle-degrading proteases from nematophagous fungi and their contribution to infection against nematodes.

Liang, L.Meng, Z.Ye, F.Yang, J.Liu, S.Sun, Y.Guo, Y.Mi, Q.Huang, X.Zou, C.Rao, Z.Lou, Z.Zhang, K.Q.

(2010) FASEB J 24: 1391-1400

  • DOI: https://doi.org/10.1096/fj.09-136408
  • Primary Citation of Related Structures:  
    3F7M, 3F7O

  • PubMed Abstract: 

    Cuticle-degrading proteases are involved in the breakdown of cuticle/eggshells of nematodes or insects, a hard physical barrier against fungal infections. Understanding the 3-dimensional structures of these proteins can provide crucial information for improving the effectiveness of these fungi in biocontrol applications, e.g., by targeted protein engineering. However, the structures of these proteases remain unknown. Here, we report the structures of two cuticle-degrading proteases from two species of nematophagous fungi. The two structures were solved with X-ray crystallography to resolutions of 1.65 A (Ver112) and 2.1 A (PL646), respectively. Crystal structures of PL646 and Ver112 were found to be very similar to each other, and similar to that of proteinase K from another fungus Tritirachium album. Differences between the structures were found among residues of the substrate binding sites (S1 and S4). Experimental studies showed that the enzymes differed in hydrolytic activity to synthetic peptide substrates. Our analyses of the hydrophobic/hydrophilic and electrostatic features of these two proteins suggest that their surfaces likely play important roles during fungal infection against nematodes. The two crystal structures provide a solid basis for investigating the relationship between structure and function of cuticle-degrading proteases.

  • Organizational Affiliation

    Laboratory for Conservation and Utilization of Bioresources, Yunnan University, 2 North Cuihu Road, Kunming 650091, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alkaline serine protease ver112279Lecanicillium psalliotaeMutation(s): 0 
EC: 3.4.21
Find proteins for Q68GV9 (Lecanicillium psalliotae)
Explore Q68GV9 
Go to UniProtKB:  Q68GV9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ68GV9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.68α = 90
b = 67.831β = 90
c = 76.347γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-04-02
    Changes: Database references, Source and taxonomy
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Refinement description