4OPF

Streptomcyes albus JA3453 oxazolomycin ketosynthase domain OzmH KS8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.156 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structural and evolutionary relationships of "AT-less" type I polyketide synthase ketosynthases.

Lohman, J.R.Ma, M.Osipiuk, J.Nocek, B.Kim, Y.Chang, C.Cuff, M.Mack, J.Bigelow, L.Li, H.Endres, M.Babnigg, G.Joachimiak, A.Phillips, G.N.Shen, B.

(2015) Proc.Natl.Acad.Sci.USA 112: 12693-12698

  • DOI: 10.1073/pnas.1515460112
  • Primary Citation of Related Structures:  4OPE, 4OQJ, 4QYR, 4TKT, 4WKY, 4ZDN

  • PubMed Abstract: 
  • Acyltransferase (AT)-less type I polyketide synthases (PKSs) break the type I PKS paradigm. They lack the integrated AT domains within their modules and instead use a discrete AT that acts in trans, whereas a type I PKS module minimally contains AT, ...

    Acyltransferase (AT)-less type I polyketide synthases (PKSs) break the type I PKS paradigm. They lack the integrated AT domains within their modules and instead use a discrete AT that acts in trans, whereas a type I PKS module minimally contains AT, acyl carrier protein (ACP), and ketosynthase (KS) domains. Structures of canonical type I PKS KS-AT didomains reveal structured linkers that connect the two domains. AT-less type I PKS KSs have remnants of these linkers, which have been hypothesized to be AT docking domains. Natural products produced by AT-less type I PKSs are very complex because of an increased representation of unique modifying domains. AT-less type I PKS KSs possess substrate specificity and fall into phylogenetic clades that correlate with their substrates, whereas canonical type I PKS KSs are monophyletic. We have solved crystal structures of seven AT-less type I PKS KS domains that represent various sequence clusters, revealing insight into the large structural and subtle amino acid residue differences that lead to unique active site topologies and substrate specificities. One set of structures represents a larger group of KS domains from both canonical and AT-less type I PKSs that accept amino acid-containing substrates. One structure has a partial AT-domain, revealing the structural consequences of a type I PKS KS evolving into an AT-less type I PKS KS. These structures highlight the structural diversity within the AT-less type I PKS KS family, and most important, provide a unique opportunity to study the molecular evolution of substrate specificity within the type I PKSs.


    Organizational Affiliation

    Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NRPS/PKS
A
438Streptomyces albusGene Names: ozmH
Find proteins for B2WW42 (Streptomyces albus)
Go to UniProtKB:  B2WW42
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 145.922α = 90.00
b = 145.922β = 90.00
c = 145.922γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
RESOLVEphasing
MLPHAREphasing
SOLVEphasing
SBC-Collectdata collection
REFMACrefinement
SCALEPACKdata scaling
SHELXDphasing
DENZOdata reduction
HKL-3000data scaling
DMphasing
HKL-3000phasing
HKL-3000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2014-02-19
    Type: Initial release
  • Version 1.1: 2014-03-05
    Type: Database references, Structure summary
  • Version 1.2: 2014-04-02
    Type: Structure summary
  • Version 1.3: 2016-11-02
    Type: Database references, Structure summary
  • Version 1.4: 2017-11-22
    Type: Refinement description