2W03

Co-complex Structure of Achromobactin Synthetase Protein D (AcsD) with adenosine, sulfate and citrate from Pectobacterium Chrysanthemi


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.205 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Acsd Catalyzes Enantioselective Citrate Desymmetrization in Siderophore Biosynthesis

Schmelz, S.Kadi, N.Mcmahon, S.A.Song, L.Oves-Costales, D.Oke, M.Liu, H.Johnson, K.A.Carter, L.Botting, C.H.White, M.F.Challis, G.L.Naismith, J.H.

(2009) Nat Chem Biol 5: 174

  • DOI: 10.1038/nchembio.145
  • Primary Citation of Related Structures:  
    2W02, 2W03, 2W04

  • PubMed Abstract: 
  • Bacterial pathogens need to scavenge iron from their host for growth and proliferation during infection. They have evolved several strategies to do this, one being the biosynthesis and excretion of small, high-affinity iron chelators known as siderophores ...

    Bacterial pathogens need to scavenge iron from their host for growth and proliferation during infection. They have evolved several strategies to do this, one being the biosynthesis and excretion of small, high-affinity iron chelators known as siderophores. The biosynthesis of siderophores is an important area of study, not only for potential therapeutic intervention but also to illuminate new enzyme chemistries. Two general pathways for siderophore biosynthesis exist: the well-characterized nonribosomal peptide synthetase (NRPS)-dependent pathway and the NRPS-independent siderophore (NIS) pathway, which relies on a different family of sparsely investigated synthetases. Here we report structural and biochemical studies of AcsD from Pectobacterium (formerly Erwinia) chrysanthemi, an NIS synthetase involved in achromobactin biosynthesis. The structures of ATP and citrate complexes provide a mechanistic rationale for stereospecific formation of an enzyme-bound (3R)-citryladenylate, which reacts with L-serine to form a likely achromobactin precursor. AcsD is a unique acyladenylate-forming enzyme with a new fold and chemical catalysis strategy.


    Organizational Affiliation

    Scottish Structural Proteomics Facility and Centre for Biomolecular Sciences, The University of St Andrews, Scotland KY16 9ST, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACSDA, B620Dickeya chrysanthemiMutation(s): 0 
Gene Names: acsD
UniProt
Find proteins for Q93AT8 (Dickeya chrysanthemi)
Explore Q93AT8 
Go to UniProtKB:  Q93AT8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADN (Subject of Investigation/LOI)
Query on ADN

Download Ideal Coordinates CCD File 
C [auth A], E [auth B]ADENOSINE
C10 H13 N5 O4
OIRDTQYFTABQOQ-KQYNXXCUSA-N
 Ligand Interaction
CIT
Query on CIT

Download Ideal Coordinates CCD File 
G [auth B]CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
D [auth A], F [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.205 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.65α = 95.43
b = 69.14β = 101.45
c = 94.19γ = 95.06
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-13
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation, Other