4YHB

Crystal structure of a siderophore utilization protein from T. fusca


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 

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This is version 1.2 of the entry. See complete history


Literature

Structure and Mechanism of the Siderophore-Interacting Protein from the Fuscachelin Gene Cluster of Thermobifida fusca.

Li, K.Chen, W.H.Bruner, S.D.

(2015) Biochemistry 54: 3989-4000

  • DOI: 10.1021/acs.biochem.5b00354
  • Primary Citation of Related Structures:  
    4YHB

  • PubMed Abstract: 
  • Microbial iron acquisition is a complex process and frequently a key and necessary step for survival. Among the several paths for iron assimilation, small molecule siderophore-mediated transport is a commonly employed strategy of many microorganisms. The chemistry and biology of the extraordinary tight and specific binding of siderophores to metal is also exploited in therapeutic treatments for microbial virulence and metal toxicity ...

    Microbial iron acquisition is a complex process and frequently a key and necessary step for survival. Among the several paths for iron assimilation, small molecule siderophore-mediated transport is a commonly employed strategy of many microorganisms. The chemistry and biology of the extraordinary tight and specific binding of siderophores to metal is also exploited in therapeutic treatments for microbial virulence and metal toxicity. The intracellular fate of iron acquired via the siderophore pathway is one of the least understood steps in the complex process at the molecular level. A common route to cellular incorporation is the single-electron reduction of ferric to ferrous iron catalyzed by specific and/or nonspecific reducing agents. The biosynthetic gene clusters for siderophores often contain representatives of one or two families of redox-active enzymes: the flavin-containing "siderophore-interacting protein" and iron-sulfur ferric siderophore reductases. Here we present the structure and characterization of the siderophore-interacting protein, FscN, from the fuscachelin siderophore gene cluster of Thermobifida fusca. The structure shows a flavoreductase fold with a noncovalently bound FAD cofactor along with an unexpected metal bound adjacent to the flavin site. We demonstrated that FscN is redox-active and measured the binding and reduction of ferric fuscachelin. This work provides a structural basis for the activity of a siderophore-interacting protein and further insight into the complex and important process of iron acquisition and utilization.


    Organizational Affiliation

    Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Iron-chelator utilization proteinA, B273Thermobifida fusca TM51Mutation(s): 0 
Gene Names: TM51_09581
UniProt
Find proteins for A0A0M3KL21 (Thermobifida fusca TM51)
Explore A0A0M3KL21 
Go to UniProtKB:  A0A0M3KL21
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0M3KL21
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.541α = 90
b = 75.067β = 102.62
c = 73.904γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Cootmodel building
PHASERphasing
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-02-27 
  • Released Date: 2015-07-15 
  • Deposition Author(s): Li, K., Bruner, S.D.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM086570

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2017-09-06
    Changes: Advisory, Author supporting evidence, Derived calculations, Source and taxonomy
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence