AntI Ser245DHA (PMSF)

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 

Starting Model: other
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wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Polyketide Trimming Shapes Dihydroxynaphthalene-Melanin and Anthraquinone Pigments.

Schmalhofer, M.Vagstad, A.L.Zhou, Q.Bode, H.B.Groll, M.

(2024) Adv Sci (Weinh) 11: e2400184-e2400184

  • DOI: https://doi.org/10.1002/advs.202400184
  • Primary Citation of Related Structures:  
    8QBH, 8QBI, 8QD1, 8QD2, 8QD3, 8QD4, 8QD5, 8QD6, 8QD7, 8QD8, 8QD9, 8QDA, 8QDB

  • PubMed Abstract: 

    Pigments such as anthraquinones (AQs) and melanins are antioxidants, protectants, or virulence factors. AQs from the entomopathogenic bacterium Photorhabdus laumondii are produced by a modular type II polyketide synthase system. A key enzyme involved in AQ biosynthesis is PlAntI, which catalyzes the hydrolysis of the bicyclic-intermediate-loaded acyl carrier protein, polyketide trimming, and assembly of the aromatic AQ scaffold. Here, multiple crystal structures of PlAntI in various conformations and with bound substrate surrogates or inhibitors are reported. Structure-based mutagenesis and activity assays provide experimental insights into the three sequential reaction steps to yield the natural product AQ-256. For comparison, a series of ligand-complex structures of two functionally related hydrolases involved in the biosynthesis of 1,8-dihydroxynaphthalene-melanin in pathogenic fungi is determined. These data provide fundamental insights into the mechanism of polyketide trimming that shapes pigments in pro- and eukaryotes.

  • Organizational Affiliation

    TUM School of Natural Sciences, Department of Bioscience, Centre for Protein Assemblies, Chair of Biochemistry, Technical University of Munich, 85748, Garching, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Photorhabdus luminescens subsp. laumondii TTO1 complete genome segment 15/17400Photorhabdus laumondii subsp. laumondii TTO1Mutation(s): 0 
Gene Names: plu4186
Find proteins for Q7MZT8 (Photorhabdus laumondii subsp. laumondii (strain DSM 15139 / CIP 105565 / TT01))
Explore Q7MZT8 
Go to UniProtKB:  Q7MZT8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7MZT8
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on DHA
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.72α = 90
b = 154.97β = 90
c = 91.37γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanySFB 1309 - 325871075

Revision History  (Full details and data files)

  • Version 1.0: 2024-03-13
    Type: Initial release
  • Version 1.1: 2024-03-27
    Changes: Database references
  • Version 1.2: 2024-06-19
    Changes: Database references