1HCW

23-RESIDUE DESIGNED METAL-FREE PEPTIDE BASED ON THE ZINC FINGER DOMAINS, NMR, 35 STRUCTURES

• PDB DOI: https://doi.org/10.2210/pdb1HCW/pdb

• Classification: GROWTH RESPONSE PROTEIN
• Mutation(s): No 


• Deposited: 1996-09-20 Released: 1997-03-12 
• Deposition Author(s): Imperiali, B., Struthers, M., Cheng, R.P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 35 
• Selection Criteria: RESTRAINT VIOLATIONS, RMS 

Literature

Design of a monomeric 23-residue polypeptide with defined tertiary structure.

Struthers, M.D., Cheng, R.P., Imperiali, B.

(1996) Science 271: 342-345

• PubMed: 8553067 
• DOI: https://doi.org/10.1126/science.271.5247.342
• Primary Citation of Related Structures:  
  1HCW


• PubMed Abstract: 
  

  Small proteins or protein domains generally require disulfide bridges or metal sites for their stabilization. Here it is shown that the beta beta alpha architecture of zinc fingers can be reproduced in a 23-residue polypeptide in the absence of metal ions. The sequence was obtained through an iterative design process. A key feature of the final design is the incorporation of a type II' beta turn to aid in beta-hairpin formation. Nuclear magnetic resonance analysis reveals that the alpha helix and beta hairpin are held together by a defined hydrophobic core. The availability of this structural template has implications for the development of functional polypeptides.

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Organizational Affiliation: 

Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.74 kDa 
• Atom Count: 196 
• Modelled Residue Count: 25 
• Deposited Residue Count: 25 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BBA1	A	25	N/A	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PYA	A	L-PEPTIDE LINKING	C15 H13 N3 O2		ALA

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 35 
• Selection Criteria: RESTRAINT VIOLATIONS, RMS 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-03-12 
Deposition Author(s): Imperiali, B., Struthers, M., Cheng, R.P.

Revision History  

• Version 1.0: 1997-03-12
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-23
  Changes: Database references, Derived calculations, Other