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Biometals

, Volume 18, Issue 6, pp 577–585 | Cite as

Petrobactin is the Primary Siderophore Synthesized by Bacillus anthracis Str. Sterne under Conditions of Iron Starvation

  • Andrew T. Koppisch
  • Cindy C. Browder
  • Amanda L. Moe
  • Jacob T. Shelley
  • Blaine A. Kinkel
  • Larry E. Hersman
  • Srinivas Iyer
  • Christy E. RuggieroEmail author
Article

Abstract

The siderophores of Bacillus anthracis are critical for the pathogen’s proliferation and may be necessary for its virulence. Bacillus anthracis str. Sterne cells were cultured in iron free media and the siderophores produced were isolated and purified using a combination of XAD-2 resin, reverse-phase FPLC, and size exclusion chromatography. A combination of 1H and 13C NMR spectroscopy, UV spectroscopy and ESI-MS/MS fragmentation were used to identify the primary siderophore as petrobactin, a catecholate species containing unusual 3,4-dihydroxybenzoate moieties, previously only identified in extracts of Marinobacter hydrocarbonoclasticus. A secondary siderophore was observed and structural analysis of this species is consistent with that reported for bacillibactin, a siderophore observed in many species of bacilli. This is the first structural characterization of a siderophore from B. anthracis, as well as the first characterization of a 3,4-DHB containing catecholate in a pathogen.

Key words

bacillibactin Bacillus anthracis iron petrobactin siderophores 

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Copyright information

© Springer 2005

Authors and Affiliations

  • Andrew T. Koppisch
    • 1
  • Cindy C. Browder
    • 2
  • Amanda L. Moe
    • 1
  • Jacob T. Shelley
    • 1
  • Blaine A. Kinkel
    • 1
  • Larry E. Hersman
    • 3
  • Srinivas Iyer
    • 1
  • Christy E. Ruggiero
    • 4
    Email author
  1. 1.Bioscience Division, B-4Los Alamos National LaboratoryLos AlamosUSA
  2. 2.Department of ChemistryFort Lewis CollegeDurangoUSA
  3. 3.Bioscience Division, B-2Los Alamos National LaboratoryLos AlamosUSA
  4. 4.Chemistry Division, C-SICLos Alamos National LaboratoryLos AlamosUSA

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