Biological Assembly 1  

Global Symmetry: Cyclic - C24  (3D View)
Global Stoichiometry: Hetero 48-mer - A24B24 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 980.53 kDa 
• Atom Count: 70,704 
• Modelled Residue Count: 8,544 
• Deposited Residue Count: 8,544 
• Unique protein chains: 2

 2Y9J

THREE-DIMENSIONAL MODEL OF SALMONELLA'S NEEDLE COMPLEX AT SUBNANOMETER RESOLUTION

• PDB DOI:  https://doi.org/10.2210/pdb2Y9J/pdb
• EM Map EMD-1874: 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: 6.40 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: 1192-1195

• 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.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN PRGH	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X	186	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P41783 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P41783  Go to UniProtKB:  P41783

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
LIPOPROTEIN PRGK	AA [auth a], BA [auth b], CA [auth c], DA [auth d], EA [auth e], FA [auth f], GA [auth g], HA [auth h], IA [auth i], JA [auth j], KA [auth k], LA [auth l], MA [auth m], NA [auth n], OA [auth o], PA [auth p], QA [auth q], RA [auth r], SA [auth s], TA [auth t], UA [auth u], VA [auth v], Y, Z	170	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P41786 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P41786  Go to UniProtKB:  P41786

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 6.40 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: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-04-19
  Changes: Other
• Version 1.4: 2017-08-30
  Changes: Data collection, Refinement description
• Version 1.5: 2019-10-23
  Changes: Data collection, Other