5ERB

Ketosynthase from module 5 of the bacillaene synthase from Bacillus amyloliquefaciens FZB42


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.288 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The LINKS motif zippers trans-acyltransferase polyketide synthase assembly lines into a biosynthetic megacomplex.

Gay, D.C.Wagner, D.T.Meinke, J.L.Zogzas, C.E.Gay, G.R.Keatinge-Clay, A.T.

(2016) J.Struct.Biol. 193: 196-205

  • DOI: 10.1016/j.jsb.2015.12.011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Polyketides such as the clinically-valuable antibacterial agent mupirocin are constructed by architecturally-sophisticated assembly lines known as trans-acyltransferase polyketide synthases. Organelle-sized megacomplexes composed of several copies of ...

    Polyketides such as the clinically-valuable antibacterial agent mupirocin are constructed by architecturally-sophisticated assembly lines known as trans-acyltransferase polyketide synthases. Organelle-sized megacomplexes composed of several copies of trans-acyltransferase polyketide synthase assembly lines have been observed by others through transmission electron microscopy to be located at the Bacillus subtilis plasma membrane, where the synthesis and export of the antibacterial polyketide bacillaene takes place. In this work we analyze ten crystal structures of trans-acyltransferase polyketide synthases ketosynthase domains, seven of which are reported here for the first time, to characterize a motif capable of zippering assembly lines into a megacomplex. While each of the three-helix LINKS (Laterally-INteracting Ketosynthase Sequence) motifs is observed to similarly dock with a spatially-reversed copy of itself through hydrophobic and ionic interactions, the amino acid sequences of this motif are not conserved. Such a code is appropriate for mediating homotypic contacts between assembly lines to ensure the ordered self-assembly of a noncovalent, yet tightly-knit, enzymatic network. LINKS-mediated lateral interactions would also have the effect of bolstering the vertical association of the polypeptides that comprise a polyketide synthase assembly line.


    Organizational Affiliation

    Department of Molecular Biosciences, The University of Texas at Austin, 1 University Station A5000, Austin, TX 78712-0165, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyketide synthase
A, B, C, D
640Bacillus amyloliquefaciensMutation(s): 0 
Gene Names: baeL
Find proteins for Q1RS72 (Bacillus amyloliquefaciens)
Go to UniProtKB:  Q1RS72
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.288 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 70.758α = 90.00
b = 319.132β = 110.26
c = 103.470γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-23
    Type: Initial release
  • Version 1.1: 2016-11-02
    Type: Database references
  • Version 1.2: 2017-09-27
    Type: Data collection, Database references, Derived calculations