2KV7

NMR solution structure of a soluble PrgI mutant from Salmonella Typhimurium


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Protein refolding is required for assembly of the type three secretion needle.

Poyraz, O.Schmidt, H.Seidel, K.Delissen, F.Ader, C.Tenenboim, H.Goosmann, C.Laube, B.Thunemann, A.F.Zychlinsky, A.Baldus, M.Lange, A.Griesinger, C.Kolbe, M.

(2010) Nat Struct Mol Biol 17: 788-792

  • DOI: 10.1038/nsmb.1822
  • Primary Citation of Related Structures:  
    2KV7, 2X9C

  • PubMed Abstract: 
  • Pathogenic Gram-negative bacteria use a type three secretion system (TTSS) to deliver virulence factors into host cells. Although the order in which proteins incorporate into the growing TTSS is well described, the underlying assembly mechanisms are still unclear ...

    Pathogenic Gram-negative bacteria use a type three secretion system (TTSS) to deliver virulence factors into host cells. Although the order in which proteins incorporate into the growing TTSS is well described, the underlying assembly mechanisms are still unclear. Here we show that the TTSS needle protomer refolds spontaneously to extend the needle from the distal end. We developed a functional mutant of the needle protomer from Shigella flexneri and Salmonella typhimurium to study its assembly in vitro. We show that the protomer partially refolds from alpha-helix into beta-strand conformation to form the TTSS needle. Reconstitution experiments show that needle growth does not require ATP. Thus, like the structurally related flagellar systems, the needle elongates by subunit polymerization at the distal end but requires protomer refolding. Our studies provide a starting point to understand the molecular assembly mechanisms and the structure of the TTSS at atomic level.


    Organizational Affiliation

    Max-Planck-Institute for Infection Biology, Cellular Microbiology, Berlin, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein prgIA83Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344Mutation(s): 2 
Gene Names: prgISTM2873
UniProt
Find proteins for P41784 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P41784 
Go to UniProtKB:  P41784
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP41784
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2010-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-12-18
    Changes: Data collection, Database references, Derived calculations