Biological Assembly 1  

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

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: 65.90 kDa 
• Atom Count: 4661 
• Modelled Residue Count: 558 
• Deposited 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

• PDB DOI: 10.2210/pdb2FQ1/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


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

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.241 
• R-Value Work: 0.186 
• R-Value Observed: 0.189 

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
• Primary Citation of Related Structures:  
  2FQ1


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isochorismatase	A, B	287	Escherichia coli	Mutation(s): 0  Gene Names: entB, entG EC: 3.3.2.1 (PDB Primary Data), 6.3.2.14 (UniProt)
UniProt
Find proteins for P0ADI4 (Escherichia coli (strain K12)) Explore P0ADI4  Go to UniProtKB:  P0ADI4

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	I [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL	H [auth A], M [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], J [auth B], K [auth B], L [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.241 
• R-Value Work: 0.186 
• R-Value Observed: 0.189 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.889	α = 90
b = 82.331	β = 90
c = 164.73	γ = 90

Software Package:

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

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
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance