3NGK

PduA from Salmonella enterica Typhimurium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insight into the Mechanisms of Transport across the Salmonella enterica Pdu Microcompartment Shell.

Crowley, C.S.Cascio, D.Sawaya, M.R.Kopstein, J.S.Bobik, T.A.Yeates, T.O.

(2010) J Biol Chem 285: 37838-37846

  • DOI: 10.1074/jbc.M110.160580
  • Primary Citation of Related Structures:  
    3N79, 3NGK

  • PubMed Abstract: 
  • Bacterial microcompartments are a functionally diverse group of proteinaceous organelles that confine specific reaction pathways in the cell within a thin protein-based shell. The propanediol utilizing (Pdu) microcompartment contains the reactions fo ...

    Bacterial microcompartments are a functionally diverse group of proteinaceous organelles that confine specific reaction pathways in the cell within a thin protein-based shell. The propanediol utilizing (Pdu) microcompartment contains the reactions for metabolizing 1,2-propanediol in certain enteric bacteria, including Salmonella. The Pdu shell is assembled from a few thousand protein subunits of several different types. Here we report the crystal structures of two key shell proteins, PduA and PduT. The crystal structures offer insights into the mechanisms of Pdu microcompartment assembly and molecular transport across the shell. PduA forms a symmetric homohexamer whose central pore appears tailored for facilitating transport of the 1,2-propanediol substrate. PduT is a novel, tandem domain shell protein that assembles as a pseudohexameric homotrimer. Its structure reveals an unexpected site for binding an [Fe-S] cluster at the center of the PduT pore. The location of a metal redox cofactor in the pore of a shell protein suggests a novel mechanism for either transferring redox equivalents across the shell or for regenerating luminal [Fe-S] clusters.


    Organizational Affiliation

    Molecular Biology Institute, Iowa State University, Ames, Iowa 50011, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Propanediol utilization protein pduAA102Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: pduASTM2038
Find proteins for P0A1C7 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A1C7 
Go to UniProtKB:  P0A1C7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 
  • Space Group: P 6 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.152α = 90
b = 67.152β = 90
c = 69.204γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance