Structure of Patellamide maturation protease PatA

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 

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Structures of cyanobactin maturation enzymes define a family of transamidating proteases.

Agarwal, V.Pierce, E.McIntosh, J.Schmidt, E.W.Nair, S.K.

(2012) Chem Biol 19: 1411-1422

  • DOI: https://doi.org/10.1016/j.chembiol.2012.09.012
  • Primary Citation of Related Structures:  
    4H6V, 4H6W, 4H6X

  • PubMed Abstract: 

    Cyanobactins, a class of ribosomally encoded macrocylic natural products, are biosynthesized through the proteolytic processing and subsequent N-C macrocylization of ribosomal peptide precursors. Macrocylization occurs through a two-step process in which the first protease (PatA) removes the amino terminal flanking sequence from the precursor to yield a free N terminus of the precursor peptide, and the second protease (PatG) removes the C-terminal flanking sequence and then catalyzes the transamidation reaction to yield an N-C cyclized product. Here, we present the crystal structures of the protease domains of PatA and PatG from the patellamide cluster and of PagA from the prenylagaramide cluster. A comparative structural and biochemical analysis of the transamidating PatG protease reveals the presence of a unique structural element distinct from canonical subtilisin proteases, which may facilitate the N-C macrocylization of the peptide substrate.

  • Organizational Affiliation

    Institute for Genomic Biology, University of Illinois at Urbana Champaign, Champaign, IL 61820, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Subtilisin-like protein306Prochloron didemniMutation(s): 0 
Gene Names: patA
Find proteins for Q52QI9 (Prochloron didemni)
Explore Q52QI9 
Go to UniProtKB:  Q52QI9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ52QI9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.717α = 90
b = 83.717β = 90
c = 42.27γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-12-05
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description