4B27

Trp RNA-binding attenuation protein: modifying symmetry and stability of a circular oligomer

• PDB DOI: https://doi.org/10.2210/pdb4B27/pdb

• Classification: TRANSCRIPTION
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2012-07-12 Released: 2012-09-19 
• Deposition Author(s): Bayfield, O.W., Chen, C., Patterson, A.R., Luan, W., Smits, C., Gollnick, P., Antson, A.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.72 Å
• R-Value Free: 0.245 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 

Literature

Trp RNA-Binding Attenuation Protein: Modifying Symmetry and Stability of a Circular Oligomer.

Bayfield, O.W., Chen, C., Patterson, A.R., Luan, W., Smits, C., Gollnick, P., Antson, A.A.

(2012) PLoS One 7: 44309

• PubMed: 22970197 
• DOI: https://doi.org/10.1371/journal.pone.0044309
• Primary Citation of Related Structures:  
  4B27


• PubMed Abstract: 
  

  Subunit number is amongst the most important structural parameters that determine size, symmetry and geometry of a circular protein oligomer. The L-tryptophan biosynthesis regulator, TRAP, present in several Bacilli, is a good model system for investigating determinants of the oligomeric state. A short segment of C-terminal residues defines whether TRAP forms an 11-mer or 12-mer assembly. To understand which oligomeric state is more stable, we examine the stability of several wild type and mutant TRAP proteins.

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Organizational Affiliation: 

York Structural Biology Laboratory, Department of Chemistry, University of York, York, United Kingdom.

Biological Assembly 1  

Global Symmetry: Cyclic - C12  (Explore in 3D)
Global Stoichiometry: Homo 12-mer - A12 

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

Macromolecule Content

• Total Structure Weight: 51.45 kDa 
• Atom Count: 3,069 
• Modelled Residue Count: 384 
• Deposited Residue Count: 450 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSCRIPTION ATTENUATION PROTEIN MTRB	A, B, C, D, E, F	75	Bacillus subtilis	Mutation(s): 1
UniProt
Find proteins for P19466 (Bacillus subtilis (strain 168)) Explore P19466  Go to UniProtKB:  P19466

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TRP	G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	TRYPTOPHAN C11 H12 N2 O2 QIVBCDIJIAJPQS-VIFPVBQESA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.72 Å
• R-Value Free: 0.245 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 109.467	α = 90
b = 110.151	β = 90
c = 46.229	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-09-19 
Deposition Author(s): Bayfield, O.W., Chen, C., Patterson, A.R., Luan, W., Smits, C., Gollnick, P., Antson, A.A.

Revision History  

• Version 1.0: 2012-09-19
  Type: Initial release
  
• Version 1.1: 2012-10-03
  Changes: Database references
• Version 1.2: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description