3SLK

Structure of ketoreductase and enoylreductase didomain from modular polyketide synthase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Divergence of multimodular polyketide synthases revealed by a didomain structure.

Zheng, J.Gay, D.C.Demeler, B.White, M.A.Keatinge-Clay, A.T.

(2012) Nat.Chem.Biol. 8: 615-621

  • DOI: 10.1038/nchembio.964

  • PubMed Abstract: 
  • The enoylreductase (ER) is the final common enzyme from modular polyketide synthases (PKSs) to be structurally characterized. The 3.0 Å-resolution structure of the didomain comprising the ketoreductase (KR) and ER from the second module of the spinos ...

    The enoylreductase (ER) is the final common enzyme from modular polyketide synthases (PKSs) to be structurally characterized. The 3.0 Å-resolution structure of the didomain comprising the ketoreductase (KR) and ER from the second module of the spinosyn PKS reveals that ER shares an ∼600-Å(2) interface with KR distinct from that of the related mammalian fatty acid synthase (FAS). In contrast to the ER domains of the mammalian FAS, the ER domains of the second module of the spinosyn PKS do not make contact across the two-fold axis of the synthase. This monomeric organization may have been necessary in the evolution of multimodular PKSs to enable acyl carrier proteins to access each of their cognate enzymes. The isolated ER domain showed activity toward a substrate analog, enabling us to determine the contributions of its active site residues.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyketide synthase extender module 2
A, B
795Saccharopolyspora spinosaMutation(s): 0 
Gene Names: spnB
Find proteins for Q9ALM5 (Saccharopolyspora spinosa)
Go to UniProtKB:  Q9ALM5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NDP
Query on NDP

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Download CCD File 
A, B
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 73.104α = 90.00
b = 110.195β = 90.00
c = 202.857γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data collection
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2012-06-13
    Type: Database references
  • Version 1.2: 2012-09-05
    Type: Database references