Pyran synthase domain from module nine of the sorangicin pathway

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural and Functional Studies of a Pyran Synthase Domain from a trans-Acyltransferase Assembly Line.

Wagner, D.T.Zhang, Z.Meoded, R.A.Cepeda, A.J.Piel, J.Keatinge-Clay, A.T.

(2018) ACS Chem Biol 13: 975-983

  • DOI: https://doi.org/10.1021/acschembio.8b00049
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    trans-Acyltransferase assembly lines possess enzymatic domains often not observed in their better characterized cis-acyltransferase counterparts. Within this repertoire of largely unexplored biosynthetic machinery is a class of enzymes called the pyran synthases that catalyze the formation of five- and six-membered cyclic ethers from diverse polyketide chains. The 1.55 Å resolution crystal structure of a pyran synthase domain excised from the ninth module of the sorangicin assembly line highlights the similarity of this enzyme to the ubiquitous dehydratase domain and provides insight into the mechanism of ring formation. Functional assays of point mutants reveal the central importance of the active site histidine that is shared with the dehydratases as well as the supporting role of a neighboring semiconserved asparagine.

  • Organizational Affiliation

    Department of Molecular Biosciences , The University of Texas at Austin , Austin , Texas 78712 , United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SorB301Sorangium cellulosumMutation(s): 0 
Gene Names: sorB
Find proteins for E5FNE5 (Sorangium cellulosum)
Explore E5FNE5 
Go to UniProtKB:  E5FNE5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE5FNE5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.55 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.205 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.37α = 90
b = 75.37β = 90
c = 195.87γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute on Drug Abuse (NIH/NIDA)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-18
    Type: Initial release
  • Version 1.1: 2018-05-02
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references