1MZJ

Crystal Structure of the Priming beta-Ketosynthase from the R1128 Polyketide Biosynthetic Pathway


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the priming beta-ketosynthase from the R1128 polyketide biosynthetic pathway

Pan, H.Tsai, S.Meadows, E.S.Miercke, L.J.Keatinge-Clay, A.T.O'Connell, J.Khosla, C.Stroud, R.M.

(--) Structure 10: 1559-1568


  • PubMed Abstract: 
  • ZhuH is a priming ketosynthase that initiates the elongation of the polyketide chain in the biosynthetic pathway of a type II polyketide, R1128. The crystal structure of ZhuH in complex with the priming substrate acetyl-CoA reveals an extensive loop ...

    ZhuH is a priming ketosynthase that initiates the elongation of the polyketide chain in the biosynthetic pathway of a type II polyketide, R1128. The crystal structure of ZhuH in complex with the priming substrate acetyl-CoA reveals an extensive loop region at the dimer interface that appears to affect the selectivity for the primer unit. Acetyl-CoA is bound in a 20 A-long channel, which placed the acetyl group against the catalytic triad. Analysis of the primer unit binding site in ZhuH suggests that it can accommodate acyl chains that are two to four carbons long. Selectivity and primer unit size appear to involve the side chains of three residues on the loops close to the dimer interface that constitute the bottom of the substrate binding pocket.


    Organizational Affiliation

    Department of Biophysics and Biochemistry, University of California San Francisco, San Francisco, CA 94143, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-ketoacylsynthase III
A, B
339Streptomyces lividansMutation(s): 0 
Gene Names: fabH (zhuH)
EC: 2.3.1.180
Find proteins for Q9F6D4 (Streptomyces lividans)
Go to UniProtKB:  Q9F6D4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA

Download SDF File 
Download CCD File 
A, B
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
ACE
Query on ACE

Download SDF File 
Download CCD File 
A, B
ACETYL GROUP
C2 H4 O
IKHGUXGNUITLKF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 96.000α = 90.00
b = 96.000β = 90.00
c = 72.600γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-12-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance