Proline activating adenylation domain of gramicidin S synthetase 2 - GrsB1-Acore

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.224 

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Directed Evolution of Piperazic Acid Incorporation by a Nonribosomal Peptide Synthetase.

Stephan, P.Langley, C.Winkler, D.Basquin, J.Caputi, L.O'Connor, S.E.Kries, H.

(2023) Angew Chem Int Ed Engl 62: e202304843-e202304843

  • DOI: https://doi.org/10.1002/anie.202304843
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Engineering of biosynthetic enzymes is increasingly employed to synthesize structural analogues of antibiotics. Of special interest are nonribosomal peptide synthetases (NRPSs) responsible for the production of important antimicrobial peptides. Here, directed evolution of an adenylation domain of a Pro-specific NRPS module completely switched substrate specificity to the non-standard amino acid piperazic acid (Piz) bearing a labile N-N bond. This success was achieved by UPLC-MS/MS-based screening of small, rationally designed mutant libraries and can presumably be replicated with a larger number of substrates and NRPS modules. The evolved NRPS produces a Piz-derived gramicidin S analogue. Thus, we give new impetus to the too-early dismissed idea that widely accessible low-throughput methods can switch the specificity of NRPSs in a biosynthetically useful fashion.

  • Organizational Affiliation

    Junior Research Group Biosynthetic Design of Natural Products, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gramicidin S synthase 2
A, B, C, D
405Aneurinibacillus migulanusMutation(s): 0 
Gene Names: grsBgrs2
Find proteins for P0C063 (Aneurinibacillus migulanus)
Explore P0C063 
Go to UniProtKB:  P0C063
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C063
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.224 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 195.021α = 90
b = 195.021β = 90
c = 346.46γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Other privateGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-05
    Type: Initial release
  • Version 1.1: 2023-08-30
    Changes: Data collection, Database references