Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D4  (3D View)
Global Stoichiometry: Homo 8-mer - A8 

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

Macromolecule Content

• Total Structure Weight: 34.25 kDa 
• Atom Count: 2454 
• Residue Count: 298 
• Unique protein chains: 1

2CG4

Structure of E.coli AsnC

• DOI: 10.2210/pdb2CG4/pdb

• Classification: TRANSCRIPTION
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-02-27 Released: 2006-04-04 
• Deposition Author(s): Thaw, P., Sedelnikova, S.E., Muranova, T., Wiese, S., Ayora, S., Alonso, J.C., Brinkman, A.B., Akerboom, J., van der Oost, J., Rafferty, J.B.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.294 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 

Literature

Structural Insight Into Gene Transcriptional Regulation and Effector Binding by the Lrp/Asnc Family.

Thaw, P., Sedelnikova, S.E., Muranova, T., Wiese, S., Ayora, S., Alonso, J.C., Brinkman, A.B., Akerboom, J., Van Der Oost, J., Rafferty, J.B.

(2006) Nucleic Acids Res 34: 1439

• PubMed: 16528101 
• DOI: 10.1093/nar/gkl009
• Primary Citation of Related Structures:  
  2CG4, 2CFX


• PubMed Abstract: 
  

The Lrp/AsnC family of transcriptional regulatory proteins is found in both archaea and bacteria. Members of the family influence cellular metabolism in both a global (Lrp) and specific (AsnC) manner, often in response to exogenous amino acid effectors. In the present study we have determined both the first bacterial and the highest resolution structures for members of the family. Escherichia coli AsnC is a specific gene regulator whose activity is triggered by asparagine binding. Bacillus subtilis LrpC is a global regulator involved in chromosome condensation. Our AsnC-asparagine structure is the first for a regulator-effector complex and is revealed as an octameric disc. Key ligand recognition residues are identified together with a route for ligand access. The LrpC structure reveals a stable octamer supportive of a topological role in dynamic DNA packaging. The structures yield significant clues to the functionality of Lrp/AsnC-type regulators with respect to ligand binding and oligomerization states as well as to their role in specific and global DNA regulation.

---

Organizational Affiliation: 

Department of Molecular Biology and Biotechnology, Krebs Institute, University of Sheffield, Western Bank, Sheffield S10 2TN, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REGULATORY PROTEIN ASNC	A, B	152	Escherichia coli	Mutation(s): 1
Find proteins for P0ACI6 (Escherichia coli (strain K12)) Explore P0ACI6  Go to UniProtKB:  P0ACI6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ASN	A, B	ASPARAGINE C4 H8 N2 O3 DCXYFEDJOCDNAF-REOHCLBHSA-N
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.294 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 
• Space Group: P 4

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 103.117	α = 90
b = 103.117	β = 90
c = 52.401	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-02-27 
• Released Date: 2006-04-04 
Deposition Author(s): Thaw, P., Sedelnikova, S.E., Muranova, T., Wiese, S., Ayora, S., Alonso, J.C., Brinkman, A.B., Akerboom, J., van der Oost, J., Rafferty, J.B.

Revision History 

• Version 1.0: 2006-04-04
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance