Ketosynthase domain 3 of Brevibacillus Brevis orphan BGC11

Experimental Data Snapshot

  • Resolution: 1.62 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.152 

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The structure of a polyketide synthase bimodule core.

Tittes, Y.U.Herbst, D.A.Martin, S.F.X.Munoz-Hernandez, H.Jakob, R.P.Maier, T.

(2022) Sci Adv 8: eabo6918-eabo6918

  • DOI: https://doi.org/10.1126/sciadv.abo6918
  • Primary Citation of Related Structures:  
    7ZM9, 7ZMA, 7ZMC, 7ZMD, 7ZMF, 7ZSK

  • PubMed Abstract: 

    Polyketide synthases (PKSs) are predominantly microbial biosynthetic enzymes. They assemble highly potent bioactive natural products from simple carboxylic acid precursors. The most versatile families of PKSs are organized as assembly lines of functional modules. Each module performs one round of precursor extension and optional modification, followed by directed transfer of the intermediate to the next module. While enzymatic domains and even modules of PKSs are well understood, the higher-order modular architecture of PKS assembly lines remains elusive. Here, we visualize a PKS bimodule core using cryo-electron microscopy and resolve a two-dimensional meshwork of the bimodule core formed by homotypic interactions between modules. The sheet-like organization provides the framework for efficient substrate transfer and for sequestration of trans-acting enzymes required for polyketide production.

  • Organizational Affiliation

    Biozentrum, University of Basel, Spitalstrasse 41, Basel 4056, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative polyketide synthase609Brevibacillus brevis NBRC 100599Mutation(s): 0 
Gene Names: BBR47_39880
Find proteins for C0ZGQ6 (Brevibacillus brevis (strain 47 / JCM 6285 / NBRC 100599))
Explore C0ZGQ6 
Go to UniProtKB:  C0ZGQ6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC0ZGQ6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.62 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.152 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.78α = 90
b = 92.69β = 92.54
c = 99.27γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland179323, 159696, 177084

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-21
    Type: Initial release
  • Version 1.1: 2023-04-05
    Changes: Database references