Crystal structure of the anthranilate CoA ligase AuaEII in complex with anthranoyl-AMP

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

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This is version 1.5 of the entry. See complete history


Structural Insights into Anthranilate Priming during Type II Polyketide Biosynthesis.

Jackson, D.R.Tu, S.S.Nguyen, M.Barajas, J.F.Schaub, A.J.Krug, D.Pistorius, D.Luo, R.Muller, R.Tsai, S.C.

(2016) ACS Chem Biol 11: 95-103

  • DOI: https://doi.org/10.1021/acschembio.5b00500
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The incorporation of nonacetate starter units during type II polyketide biosynthesis helps diversify natural products. Currently, there are few enzymatic strategies for the incorporation of nonacetate starter units in type II polyketide synthase (PKS) pathways. Here we report the crystal structure of AuaEII, the anthranilate:CoA ligase responsible for the generation of anthraniloyl-CoA, which is used as a starter unit by a type II PKS in aurachin biosynthesis. We present structural and protein sequence comparisons to other aryl:CoA ligases. We also compare the AuaEII crystal structure to a model of a CoA ligase homologue, AuaE, which is present in the same gene cluster. AuaE is predicted to have the same fold as AuaEII, but instead of CoA ligation, AuaE catalyzes acyl transfer of anthranilate from anthraniloyl-CoA to the acyl carrier protein (ACP). Together, this work provides insight into the molecular basis for starter unit selection of anthranilate in type II PKS biosynthesis.

  • Organizational Affiliation

    Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Pharmaceutical Biotechnology, Saarland University , Campus C2 3, 66123 Saarbrücken, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Anthranilate-CoA ligase
A, B
529Stigmatella aurantiacaMutation(s): 0 
Gene Names: auaEII
Find proteins for F3Y661 (Stigmatella aurantiaca)
Explore F3Y661 
Go to UniProtKB:  F3Y661
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF3Y661
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 3UK

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C17 H19 N6 O8 P
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.054α = 90
b = 132.219β = 90
c = 160.118γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States5R01GM100305-03

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-11
    Type: Initial release
  • Version 1.1: 2015-12-02
    Changes: Database references
  • Version 1.2: 2016-01-27
    Changes: Database references
  • Version 1.3: 2017-09-20
    Changes: Author supporting evidence, Derived calculations
  • Version 1.4: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Refinement description