Mupirocin didomain ACP

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


A conserved motif flags acyl carrier proteins for beta-branching in polyketide synthesis.

Haines, A.S.Dong, X.Song, Z.Farmer, R.Williams, C.Hothersall, J.Poskon, E.Wattana-Amorn, P.Stephens, E.R.Yamada, E.Gurney, R.Takebayashi, Y.Masschelein, J.Cox, R.J.Lavigne, R.Willis, C.L.Simpson, T.J.Crosby, J.Winn, P.J.Thomas, C.M.Crump, M.P.

(2013) Nat Chem Biol 9: 685-692

  • DOI: https://doi.org/10.1038/nchembio.1342
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Type I polyketide synthases often use programmed β-branching, via enzymes of a 'hydroxymethylglutaryl-CoA synthase (HCS) cassette', to incorporate various side chains at the second carbon from the terminal carboxylic acid of growing polyketide backbones. We identified a strong sequence motif in acyl carrier proteins (ACPs) where β-branching is known to occur. Substituting ACPs confirmed a correlation of ACP type with β-branching specificity. Although these ACPs often occur in tandem, NMR analysis of tandem β-branching ACPs indicated no ACP-ACP synergistic effects and revealed that the conserved sequence motif forms an internal core rather than an exposed patch. Modeling and mutagenesis identified ACP helix III as a probable anchor point of the ACP-HCS complex whose position is determined by the core. Mutating the core affects ACP functionality, whereas ACP-HCS interface substitutions modulate system specificity. Our method for predicting β-carbon branching expands the potential for engineering new polyketides and lays a basis for determining specificity rules.

  • Organizational Affiliation

    School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mupirocin didomain Acyl Carrier Protein212Pseudomonas fluorescensMutation(s): 0 
Gene Names: mmpI
Find proteins for Q8RL76 (Pseudomonas fluorescens)
Explore Q8RL76 
Go to UniProtKB:  Q8RL76
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8RL76
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-15
    Type: Initial release
  • Version 1.1: 2013-09-18
    Changes: Database references
  • Version 1.2: 2013-10-09
    Changes: Database references
  • Version 1.3: 2013-11-06
    Changes: Database references
  • Version 1.4: 2024-05-01
    Changes: Data collection, Database references