Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 52.52 kDa 
• Atom Count: 4445 
• Residue Count: 484 
• Unique protein chains: 1

5MIH

Crystal structure of the lectin LecA from Pseudomonas aeruginosa in complex with a phenyl-epoxy-galactopyranoside

• DOI: 10.2210/pdb5MIH/pdb

• Classification: SUGAR BINDING PROTEIN
• Organism(s): Pseudomonas aeruginosa PAO1
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2016-11-28 Released: 2017-10-11 
• Deposition Author(s): Wagner, S., Hauk, D., Hofmann, M., Joachim, I., Sommer, R., Muller, R., Imberty, A., Varrot, A., Titz, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.194 
• R-Value Work: 0.149 
• R-Value Observed: 0.151 

Literature

Covalent Lectin Inhibition and Application in Bacterial Biofilm Imaging.

Wagner, S., Hauck, D., Hoffmann, M., Sommer, R., Joachim, I., Muller, R., Imberty, A., Varrot, A., Titz, A.

(2017) Angew Chem Int Ed Engl 56: 16559-16564

• PubMed: 28960731 
• DOI: 10.1002/anie.201709368
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Biofilm formation by pathogenic bacteria is a hallmark of chronic infections. In many cases, lectins play key roles in establishing biofilms. The pathogen Pseudomonas aeruginosa often exhibiting various drug resistances employs its lectins LecA and LecB as virulence factors and biofilm building blocks. Therefore, inhibition of the function of these proteins is thought to have potential in developing "pathoblockers" preventing biofilm formation and virulence. A covalent lectin inhibitor specific to a carbohydrate binding site is described for the first time. Its application in the LecA-specific in vitro imaging of biofilms formed by P. aeruginosa is also reported.

---

Organizational Affiliation: 

Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PA-I galactophilic lectin	A, B, C, D	121	Pseudomonas aeruginosa PAO1	Mutation(s): 0  Gene Names: lecA, pa1L, PA2570
Find proteins for Q05097 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Go to UniProtKB:  Q05097

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
7NU	A, B, C, D	Phenyl 6,7-dideoxy-6,7-epoxy-beta-D-galacto-heptopyranoside(6D) C13 H16 O6 BGULDTQQEDQGRU-LREJFELKSA-N
ETE	C	2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL C9 H20 O5 ZNYRFEPBTVGZDN-UHFFFAOYSA-N
CA	A, B, C, D	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
7NU	IC50:  64000   nM  Binding MOAD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.194 
• R-Value Work: 0.149 
• R-Value Observed: 0.151 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 27.343	α = 90
b = 73.771	β = 93.36
c = 101.454	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-11-28 
• Released Date: 2017-10-11 
Deposition Author(s): Wagner, S., Hauk, D., Hofmann, M., Joachim, I., Sommer, R., Muller, R., Imberty, A., Varrot, A., Titz, A.

Revision History 

• Version 1.0: 2017-10-11
  Type: Initial release
  
• Version 1.1: 2018-01-03
  Changes: Database references