Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 65902.46 
• Atom Count: 4432 
• Residue Count: 574 
• Unique protein chains: 1

2FQ1

Crystal structure of the two-domain non-ribosomal peptide synthetase EntB containing isochorismate lyase and aryl-carrier protein domains

• DOI: 10.2210/pdb2FQ1/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2006-01-17 Released: 2006-05-02 
• Deposition Author(s): Drake, E.J., Nicolai, D.A., Gulick, A.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.241 
• R-Value Work: 0.186 

Literature

Structure of the EntB multidomain nonribosomal peptide synthetase and functional analysis of its interaction with the EntE adenylation domain.

Drake, E.J., Nicolai, D.A., Gulick, A.M.

(2006) Chem.Biol. 13: 409-419

• PubMed: 16632253 
• DOI: 10.1016/j.chembiol.2006.02.005


• PubMed Abstract: 
  

Nonribosomal peptide synthetases are modular proteins that operate in an assembly line fashion to bind, modify, and link amino acids. In the E. coli enterobactin NRPS system, the EntE adenylation domain catalyzes the transfer of a molecule of 2,3-dihydroxybenzoic acid to the pantetheine cofactor of EntB. We present here the crystal structure of the EntB protein that contains an N-terminal isochorismate lyase domain that functions in the synthesis of 2,3-dihydroxybenzoate and a C-terminal carrier protein domain. Functional analysis showed that the EntB-EntE interaction was surprisingly tolerant of a number of point mutations on the surface of EntB and EntE. Mutational studies on EntE support our previous hypothesis that members of the adenylate-forming family of enzymes adopt two distinct conformations to catalyze the two-step reactions.

---

Organizational Affiliation: 

Hauptman-Woodward Medical Research Institute, 700 Ellicott Street, Buffalo, New York 14203, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Isochorismatase	A, B	287	Escherichia coli (strain K12)	Mutation(s): 0  Gene Names: entB (entG) EC: 6.3.2.14
Find proteins for P0ADI4 (Escherichia coli (strain K12)) Go to UniProtKB:  P0ADI4

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CL	A, B	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
EDO	A	1,2-ETHANEDIOL ETHYLENE GLYCOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG	A, B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.241 
• R-Value Work: 0.186 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 50.889	α = 90.00
b = 82.331	β = 90.00
c = 164.730	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
PHASER	phasing
DENZO	data reduction
PDB_EXTRACT	data extraction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-01-17 
• Released Date: 2006-05-02 
• Deposition Author(s): Drake, E.J., Nicolai, D.A., Gulick, A.M.

Revision History 

• Version 1.0: 2006-05-02
  Type: Initial release
• Version 1.1: 2008-05-01
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Advisory, Version format compliance