2M7C

Circular Permutation of the Trp-cage: Fold Rescue upon Addition of a Hydrophobic Staple

• PDB DOI: https://doi.org/10.2210/pdb2M7C/pdb
• BMRB: 19180

• Classification: DE NOVO PROTEIN
• Mutation(s): No 


• Deposited: 2013-04-18 Released: 2013-12-25 
• Deposition Author(s): Byrne, A., Andersen, N.H., Kier, B.L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 32 
• Selection Criteria: structures with the lowest energy 

Literature

Circular Permutation of the Trp-cage: Fold Rescue upon Addition of a Hydrophobic Staple.

Byrne, A., Kier, B.L., Williams, D.V., Scian, M., Andersen, N.H.

(2013) RSC Adv 2013: 19824-19829

• PubMed: 24376912 
• DOI: https://doi.org/10.1039/C3RA43674H
• Primary Citation of Related Structures:  
  2M7C, 2M7D


• PubMed Abstract: 
  

  The Trp-cage, at 20 residues in length, is generally acknowledged as the smallest fully protein-like folding motif. Linking the termini by a two-residue unit and excising one residue affords circularly permuted sequences that adopt the same structure. This represents the first successful circular permutation of any fold of less than 50-residue length. As was observed for the original topology, a hydrophobic staple near the chain termini is required for enhanced fold stability.

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Organizational Affiliation: 

Department of Chemistry, University of Washington Seattle, Washington, 98195, USA [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.22 kDa 
• Atom Count: 158 
• Modelled Residue Count: 21 
• Deposited Residue Count: 21 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Trp-Cage mini-protein	A	21	N/A	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
AIB	A	L-PEPTIDE LINKING	C4 H9 N O2		ALA

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 32 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-12-25 
Deposition Author(s): Byrne, A., Andersen, N.H., Kier, B.L.

Revision History  

• Version 1.0: 2013-12-25
  Type: Initial release
  
• Version 1.1: 2014-01-15
  Changes: Database references
• Version 1.2: 2023-06-14
  Changes: Database references, Derived calculations, Other