Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Macromolecule Content

• Total Structure Weight: 100426.51 
• Atom Count: 6486 
• Residue Count: 893 
• Unique protein chains: 1

2WW8

Structure of the pilus adhesin (RrgA) from Streptococcus pneumoniae

• DOI: 10.2210/pdb2WW8/pdb

• Classification: CELL ADHESION
• Organism(s): Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2009-10-22 Released: 2010-01-19 
• Deposition Author(s): Izore, T., Contreras-Martel, C., El-Mortaji, L., Manzano, C., Terrasse, R., Vernet, T., Di-Guilmi, A.M., Dessen, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.235 
• R-Value Work: 0.195 

Literature

Structural Basis of Host Cell Recognition by the Pilus Adhesin from Streptococcus Pneumoniae

Izore, T., Contreras-Martel, C., El-Mortaji, L., Manzano, C., Terrasse, R., Vernet, T., Di-Guilmi, A.M., Dessen, A.

(2010) Structure 18: 106

• PubMed: 20152157 
• DOI: 10.1016/j.str.2009.10.019
• Also Cited By: 5MKC


• PubMed Abstract: 
  

Pili are fibrous virulence factors associated directly to the bacterial surface that play critical roles in adhesion and recognition of host cell receptors. The human pathogen Streptococcus pneumoniae carries a single pilus-related adhesin (RrgA) that is key for infection establishment and provides protection from bacterial challenge in animal infection models, but details of these roles remain unclear. Here we report the high-resolution crystal structure of RrgA, a 893-residue elongated macromolecule whose fold contains four domains presenting both eukaryotic and prokaryotic origins. RrgA harbors an integrin I collagen-recognition domain decorated with two inserted "arms" that fold into a positively charged cradle, as well as three "stalk-forming" domains. We show by site-specific mutagenesis, mass spectrometry, and thermal shift assays that intradomain isopeptide bonds play key roles in stabilizing RrgA's stalk. The high sequence similarity between RrgA and its homologs in other Gram-positive microorganisms suggests common strategies for ECM recognition and immune evasion.

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Organizational Affiliation: 

Institut de Biologie Structurale Jean-Pierre Ebel, UMR 5075 (CEA, CNRS, UJF), Grenoble, France.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CELL WALL SURFACE ANCHOR FAMILY PROTEIN	A	893	Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)	Mutation(s): 0
Find proteins for A0A0H2UNT6 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)) Go to UniProtKB:  A0A0H2UNT6

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
EPE	A	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID HEPES C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.235 
• R-Value Work: 0.195 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 51.081	α = 90.00
b = 82.700	β = 90.00
c = 299.338	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-10-22 
• Released Date: 2010-01-19 
• Deposition Author(s): Izore, T., Contreras-Martel, C., El-Mortaji, L., Manzano, C., Terrasse, R., Vernet, T., Di-Guilmi, A.M., Dessen, A.

Revision History 

• Version 1.0: 2010-01-19
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance
• Version 1.2: 2013-03-06
  Type: Data collection