Structure of muramidase from Trichobolus zukalii

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.143 
  • R-Value Work: 0.104 

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Fungal GH25 muramidases: New family members with applications in animal nutrition and a crystal structure at 0.78 angstrom resolution.

Moroz, O.V.Blagova, E.Taylor, E.Turkenburg, J.P.Skov, L.K.Gippert, G.P.Schnorr, K.M.Ming, L.Ye, L.Klausen, M.Cohn, M.T.Schmidt, E.G.W.Nymand-Grarup, S.Davies, G.J.Wilson, K.S.

(2021) PLoS One 16: e0248190-e0248190

  • DOI: https://doi.org/10.1371/journal.pone.0248190
  • Primary Citation of Related Structures:  
    6ZM8, 6ZMV

  • PubMed Abstract: 

    Muramidases/lysozymes hydrolyse the peptidoglycan component of the bacterial cell wall. They are found in many of the glycoside hydrolase (GH) families. Family GH25 contains muramidases/lysozymes, known as CH type lysozymes, as they were initially discovered in the Chalaropsis species of fungus. The characterized enzymes from GH25 exhibit both β-1,4-N-acetyl- and β-1,4-N,6-O-diacetylmuramidase activities, cleaving the β-1,4-glycosidic bond between N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) moieties in the carbohydrate backbone of bacterial peptidoglycan. Here, a set of fungal GH25 muramidases were identified from a sequence search, cloned and expressed and screened for their ability to digest bacterial peptidoglycan, to be used in a commercial application in chicken feed. The screen identified the enzyme from Acremonium alcalophilum JCM 736 as a suitable candidate for this purpose and its relevant biochemical and biophysical and properties are described. We report the crystal structure of the A. alcalophilum enzyme at atomic, 0.78 Å resolution, together with that of its homologue from Trichobolus zukalii at 1.4 Å, and compare these with the structures of homologues. GH25 enzymes offer a new solution in animal feed applications such as for processing bacterial debris in the animal gut.

  • Organizational Affiliation

    Department of Chemistry, Structural Biology Laboratory, The University of York, York, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
207Trichobolus zukaliiMutation(s): 0 
Find proteins for A0A7S6G7I6 (Trichobolus zukalii)
Explore A0A7S6G7I6 
Go to UniProtKB:  A0A7S6G7I6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A7S6G7I6
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SO4

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B],
M [auth B]
O4 S
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
H [auth B]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
H [auth B],
I [auth B],
J [auth B],
K [auth B]
C3 H8 O3
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.143 
  • R-Value Work: 0.104 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.398α = 97.076
b = 48.582β = 99.531
c = 55.737γ = 98.15
Software Package:
Software NamePurpose
xia2data reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2021-07-14
    Type: Initial release
  • Version 1.1: 2022-01-26
    Changes: Advisory, Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Derived calculations, Refinement description