2EXT

TRAP4 (engineered TRAP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Rounding up: Engineering 12-Membered Rings from the Cyclic 11-Mer TRAP

Heddle, J.G.Yokoyama, T.Yamashita, I.Park, S.Y.Tame, J.R.H.

(2006) Structure 14: 925-933

  • DOI: https://doi.org/10.1016/j.str.2006.03.013
  • Primary Citation of Related Structures:  
    2EXS, 2EXT

  • PubMed Abstract: 

    The protein TRAP (trp RNA binding attenuation protein) forms a highly thermostable ring-shaped 11-mer. By linking in tandem two, three, or four DNA sequences encoding TRAP monomers, we have engineered new rings that consist of 12 TRAP subunits and bind 12 ligand molecules. The hydrogen bonding pattern and buried surface area within and between subunits are essentially identical between the 11-mer and 12-mer crystal structures. Why do the artificial proteins choose to make single 12-mer rings? The 12-mer rings are highly sterically strained by their peptide linkers and far from thermostable. That proteins choose to adopt a strained conformation of few subunits rather than an unstrained one with 11 subunits demonstrates the importance of entropic factors in controlling protein-protein interactions in general.


  • Organizational Affiliation

    Protein Design Laboratory, Yokohama City University, Tsurumi, Suehiro 1-7-29, Yokohama 230-0045, Japan. [email protected]


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcription attenuation protein mtrB
A, B, C
77Geobacillus stearothermophilusMutation(s): 0 
Gene Names: MTRB
UniProt
Find proteins for Q9X6J6 (Geobacillus stearothermophilus)
Explore Q9X6J6 
Go to UniProtKB:  Q9X6J6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9X6J6
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.789α = 90
b = 109.789β = 90
c = 36.871γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-01
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references, Derived calculations