2Y9K

Three-dimensional model of Salmonella's needle complex at subnanometer resolution

• PDB DOI: https://doi.org/10.2210/pdb2Y9K/pdb
• EM Map EMD-1871: EMDB EMDataResource

• Classification: PROTEIN TRANSPORT
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Mutation(s): No 


• Deposited: 2011-02-15 Released: 2011-03-23 
• Deposition Author(s): Schraidt, O., Marlovits, T.C.

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 8.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Three-Dimensional Model of Salmonella'S Needle Complex at Subnanometer Resolution.

Schraidt, O., Marlovits, T.C.

(2011) Science 331: 1192

• PubMed: 21385715 
• DOI: https://doi.org/10.1126/science.1199358
• Primary Citation of Related Structures:  
  2Y9J, 2Y9K


• PubMed Abstract: 
  

  Type III secretion systems (T3SSs) are essential virulence factors used by many Gram-negative bacteria to inject proteins that make eukaryotic host cells accessible to invasion. The T3SS core structure, the needle complex (NC), is a ~3.5 megadalton-sized, oligomeric, membrane-embedded complex. Analyzing cryo-electron microscopy images of top views of NCs or NC substructures from Salmonella typhimurium revealed a 24-fold symmetry for the inner rings and a 15-fold symmetry for the outer rings, giving an overall C3 symmetry. Local refinement and averaging showed the organization of the central core and allowed us to reconstruct a subnanometer composite structure of the NC, which together with confident docking of atomic structures reveal insights into its overall organization and structural requirements during assembly.

---

Organizational Affiliation: 

Research Institute of Molecular Pathology, Dr. Bohr Gasse 7, A-1030 Vienna, Austria.

Biological Assembly 1  

Global Symmetry: Cyclic - C15  (Explore in 3D)
Global Stoichiometry: Homo 15-mer - A15 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 234.25 kDa 
• Atom Count: 16,485 
• Modelled Residue Count: 2,055 
• Deposited Residue Count: 2,055 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN INVG	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	137	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P35672 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P35672  Go to UniProtKB:  P35672

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 8.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	IMAGIC

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-03-23 
Deposition Author(s): Schraidt, O., Marlovits, T.C.

Revision History  

• Version 1.0: 2011-03-23
  Type: Initial release
  
• Version 1.1: 2013-03-20
  Changes: Other, Refinement description, Version format compliance
• Version 1.2: 2017-04-19
  Changes: Other
• Version 1.3: 2017-08-30
  Changes: Data collection, Refinement description
• Version 1.4: 2019-10-23
  Changes: Data collection, Other