1ICL

SOLUTION STRUCTURE OF DESIGNED BETA-SHEET MINI-PROTEIN TH1OX

• PDB DOI: https://doi.org/10.2210/pdb1ICL/pdb

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


• Deposited: 2001-04-02 Released: 2001-04-11 
• Deposition Author(s): Ottesen, J.J., Imperiali, B.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 57 
• Conformers Submitted: 38 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Literature

Design of a discretely folded mini-protein motif with predominantly beta-structure.

Ottesen, J.J., Imperiali, B.

(2001) Nat Struct Biol 8: 535-539

• PubMed: 11373623 
• DOI: https://doi.org/10.1038/88604
• Primary Citation of Related Structures:  
  1IC9, 1ICL, 1ICO


• PubMed Abstract: 
  

  Here we report the creation of a predominantly beta-structured mini-protein motif. The design target is based on the naturally occurring toxin hand (TH) motifs that are composed of four disulfide bonds and three loops that form a 'hand'. Analysis and subsequent modification of several generations of mini-proteins produced the final 29-residue mini-protein. The structured motif of this new mini-protein provides insight into the compensatory changes that result in the formation of a tightly packed hydrophobic core in a small, globular beta-structure motif. Additionally, this mini-motif represents a new, distinct surface topology for protein design and a valuable, yet compact, model system for the study of beta-sheet structure in water.

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Organizational Affiliation: 

Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.25 kDa 
• Atom Count: 228 
• Modelled Residue Count: 29 
• Deposited Residue Count: 29 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TH1OX	A	29	N/A	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 57 
• Conformers Submitted: 38 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-04-11 
Deposition Author(s): Ottesen, J.J., Imperiali, B.

Revision History  

• Version 1.0: 2001-04-11
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-23
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-10-16
  Changes: Data collection, Structure summary