Precursor of Protealysin, Metalloproteinase from Serratia proteamaculans.

Experimental Data Snapshot

  • Resolution: 1.82 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 

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This is version 1.4 of the entry. See complete history


Crystal Structure of the Protealysin Precursor: Insights Into Propeptide Function.

Demidyuk, I.V.Gromova, T.Y.Polyakov, K.M.Melik-Adamyan, W.R.Kuranova, I.P.Kostrov, S.V.

(2010) J Biol Chem 285: 2003

  • DOI: https://doi.org/10.1074/jbc.M109.015396
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Protealysin (PLN) belongs to the M4 family of peptidases that are commonly known as thermolysin-like proteases (TLPs). All TLPs are synthesized as precursors containing N-terminal propeptides. According to the primary structure of the N-terminal propeptides, the family is divided into two distinct groups. Representatives of the first group including thermolysin and all TLPs with known three-dimensional structures have long prosequences ( approximately 200 amino acids). Enzymes of the second group, whose prototype is protealysin, have short ( approximately 50 amino acids) propeptides. Here, we present the 1.8 A crystal structure of PLN precursor (proPLN), which is the first three-dimensional structure of a TLP precursor. Whereas the structure of the catalytic domain of proPLN is similar overall to previously reported structures of mature TLPs, it has specific features, including the absence of calcium-binding sites, and different structures of the N-terminal region and substrate-binding site. PLN propeptide forms a separate domain in the precursor and likely acts as an inhibitor that blocks the substrate-binding site and fixes the "open" conformation of the active site, which is unfavorable for catalysis. Furthermore the conserved PPL motif identified in our previous studies directly interacts with the S' subsites of the active center being a critical element of the propeptide-catalytic domain interface. Comparison of the primary structures of TLPs with short propeptides suggests that the specific features revealed in the proPLN crystal structure are typical for all protealysin-like enzymes. Thus, such proteins can be considered as a separate subfamily of TLPs.

  • Organizational Affiliation

    Institute of Molecular Genetics, Russian Academy of Sciences, Kurchatov Sq. 2, Moscow 123182, Russia. duk@img.ras.ru

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
METALLOPROTEINASE341Serratia proteamaculansMutation(s): 1 
Find proteins for Q5MJ80 (Serratia proteamaculans)
Explore Q5MJ80 
Go to UniProtKB:  Q5MJ80
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5MJ80
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Experimental Data & Validation

Experimental Data

  • Resolution: 1.82 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.76α = 90
b = 78.65β = 90
c = 59.28γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-15
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description