Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 35.42 kDa 
• Atom Count: 2728 
• Modelled Residue Count: 315 
• Deposited Residue Count: 318 
• Unique protein chains: 1

2YNY

Salmonella enterica SadA 255-302 fused to GCN4 adaptors (SadAK1)

• PDB DOI: 10.2210/pdb2YNY/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Saccharomyces cerevisiae, Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2012-10-20 Released: 2012-12-12 
• Deposition Author(s): Hartmann, M.D., Hernandez Alvarez, B., Albrecht, R., Lupas, A.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.198 
• R-Value Work: 0.133 
• R-Value Observed: 0.136 

Literature

Complete Fiber Structures of Complex Trimeric Autotransporter Adhesins Conserved in Enterobacteria.

Hartmann, M.D., Grin, I., Dunin-Horkawicz, S., Deiss, S., Linke, D., Lupas, A.N., Hernandez Alvarez, B.

(2012) Proc Natl Acad Sci U S A 109: 20907

• PubMed: 23213248 
• DOI: 10.1073/pnas.1211872110
• Primary Citation of Related Structures:  
  2YNY, 2YNZ, 2YO0, 2YO1, 2YO2, 2YO3


• PubMed Abstract: 
  

Trimeric autotransporter adhesins (TAAs) are modular, highly repetitive surface proteins that mediate adhesion to host cells in a broad range of Gram-negative pathogens. Although their sizes may differ by more than one order of magnitude, they all follow the same basic head-stalk-anchor architecture, where the head mediates adhesion and autoagglutination, the stalk projects the head from the bacterial surface, and the anchor provides the export function and attaches the adhesin to the bacterial outer membrane after export is complete. In complex adhesins, head and stalk domains may alternate several times before the anchor is reached. Despite extensive sequence divergence, the structures of TAA domains are highly constrained, due to the tight interleaving of their constituent polypeptide chains. We have therefore taken a "domain dictionary" approach to characterize representatives for each domain type by X-ray crystallography and use these structures to reconstruct complete TAA fibers. With SadA from Salmonella enterica, EhaG from enteropathogenic Escherichia coli (EHEC), and UpaG from uropathogenic E. coli (UPEC), we present three representative structures of a complex adhesin that occur in a conserved genomic context in Enterobacteria and is essential in the infection process of uropathogenic E. coli. Our work proves the applicability of the dictionary approach to understanding the structure of a class of proteins that are otherwise poorly tractable by high-resolution methods and provides a basis for the rapid and detailed annotation of newly identified TAAs.

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Related Citations: 

• A New Expression System for Protein Crystallization Using Trimeric Coiled-Coil Adaptors.
  Hernandez Alvarez, B., Hartmann, M.D., Albrecht, R., Lupas, A.N., Zeth, K., Linke, D.
  (2008) Protein Eng Des Sel 21: 11

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Organizational Affiliation: 

Department of Protein Evolution, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GENERAL CONTROL PROTEIN GCN4, PUTATIVE INNER MEMBRANE PROTEIN	A, B, C	106	Saccharomyces cerevisiae, Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 16
UniProt
Find proteins for Q8ZL64 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore Q8ZL64  Go to UniProtKB:  Q8ZL64
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P03069  Go to UniProtKB:  P03069
UniProt Groups	Q8ZL64P03069

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.198 
• R-Value Work: 0.133 
• R-Value Observed: 0.136 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 34.81	α = 90
b = 40.36	β = 93.51
c = 98.62	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-10-20 
• Released Date: 2012-12-12 
Deposition Author(s): Hartmann, M.D., Hernandez Alvarez, B., Albrecht, R., Lupas, A.N.

Revision History  

• Version 1.0: 2012-12-12
  Type: Initial release
  
• Version 1.1: 2013-01-09
  Changes: Database references
• Version 1.2: 2017-03-15
  Changes: Source and taxonomy