2Z5L

The first ketoreductase of the tylosin PKS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.259 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A tylosin ketoreductase reveals how chirality is determined in polyketides

Keatinge-Clay, A.T.

(2007) Chem Biol 14: 898-908

  • DOI: 10.1016/j.chembiol.2007.07.009
  • Primary Citation of Related Structures:  
    2Z5L

  • PubMed Abstract: 
  • Because it controls the majority of polyketide stereocenters, the ketoreductase (KR) is a central target in engineering polyketide synthases (PKSs). To elucidate the mechanisms of stereocontrol, the structure of KR from the first module of the tylosin PKS was determined ...

    Because it controls the majority of polyketide stereocenters, the ketoreductase (KR) is a central target in engineering polyketide synthases (PKSs). To elucidate the mechanisms of stereocontrol, the structure of KR from the first module of the tylosin PKS was determined. A comparison with a recently solved erythromycin KR that operates on the same substrate explains why their products have opposite alpha-substituent chiralities. The structure reveals how polyketides are guided into the active site by key residues in different KR types. There are four types of reductase-competent KRs, each capable of fixing a unique combination of alpha-substituent and beta-hydroxyl group chiralities, as well as two types of reductase-incompetent KRs that control alpha-substituent chirality alone. A protocol to assign how a module will enforce substituent chirality based on its sequence is presented.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158, USA. adriankc@msg.ucsf.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tylactone synthase starter module and modules 1 & 2A511Streptomyces fradiaeMutation(s): 0 
Gene Names: tylG
EC: 1.1.1.100
UniProt
Find proteins for O33954 (Streptomyces fradiae)
Explore O33954 
Go to UniProtKB:  O33954
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO33954
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.259 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.18α = 90
b = 49.81β = 109.2
c = 68.81γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-08-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-11-12
    Changes: Structure summary