Structure of surfactin A synthetase C (SrfA-C), a nonribosomal peptide synthetase termination module

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

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Crystal structure of the termination module of a nonribosomal peptide synthetase.

Tanovic, A.Samel, S.A.Essen, L.O.Marahiel, M.A.

(2008) Science 321: 659-663

  • DOI: https://doi.org/10.1126/science.1159850
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Nonribosomal peptide synthetases (NRPSs) are modular multidomain enzymes that act as an assembly line to catalyze the biosynthesis of complex natural products. The crystal structure of the 144-kilodalton Bacillus subtilis termination module SrfA-C was solved at 2.6 angstrom resolution. The adenylation and condensation domains of SrfA-C associate closely to form a catalytic platform, with their active sites on the same side of the platform. The peptidyl carrier protein domain is flexibly tethered to this platform and thus can move with its substrate-loaded 4'-phosphopantetheine arm between the active site of the adenylation domain and the donor side of the condensation domain. The SrfA-C crystal structure has implications for the rational redesign of NRPSs as a means of producing novel bioactive peptides.

  • Organizational Affiliation

    Biochemistry, Department of Chemistry, Philipps University Marburg, Hans-Meerwein-Strasse, D35032 Marburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SURFACTIN SYNTHETASE SUBUNIT 31,304Bacillus subtilisMutation(s): 1 
Find proteins for Q08787 (Bacillus subtilis (strain 168))
Explore Q08787 
Go to UniProtKB:  Q08787
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ08787
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.106α = 90
b = 106.562β = 97.35
c = 92.401γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 2.0: 2019-01-30
    Changes: Atomic model, Data collection, Database references
  • Version 2.1: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description