1QQV | pdb_00001qqv

SOLUTION STRUCTURE OF THE HEADPIECE DOMAIN OF CHICKEN VILLIN

• PDB DOI: https://doi.org/10.2210/pdb1QQV/pdb
• BMRB: 4428

• Classification: STRUCTURAL PROTEIN
• Organism(s): Gallus gallus
• Mutation(s): No 


• Deposited: 1999-06-08 Released: 1999-12-29 
• Deposition Author(s): Vardar, D., Buckley, D.A., Frank, B.S., McKnight, C.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 31 
• Conformers Submitted: 1 
• Selection Criteria: no NOE violation > 0.3, no angle violations greater than 5 degrees 

Literature

NMR structure of an F-actin-binding "headpiece" motif from villin.

Vardar, D., Buckley, D.A., Frank, B.S., McKnight, C.J.

(1999) J Mol Biology 294: 1299-1310

• PubMed: 10600386 
• DOI: https://doi.org/10.1006/jmbi.1999.3321
• Primary Citation Related Structures: 
  1QQV


• PubMed Abstract: 
  

  A growing family of F-actin-bundling proteins harbors a modular F-actin-binding headpiece domain at the C terminus. Headpiece provides one of the two F-actin-binding sites essential for filament bundling. Here, we report the first structure of a functional headpiece domain. The NMR structure of chicken villin headpiece (HP67) reveals two subdomains that share a tightly packed hydrophobic core. The N-terminal subdomain contains bends, turns, and a four-residue alpha-helix as well as a buried histidine residue that imparts a pH-dependent folding. The C-terminal subdomain is composed of three alpha-helices and its folding is pH-independent. Two residues previously implicated in F-actin-binding form a buried salt-bridge between the N and C-terminal subdomains. The rest of the identified actin-binding residues are solvent-exposed and map onto a unique F-actin-binding surface.

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Organizational Affiliation: 
• Department of Biophysics, Boston University School of Medicine, 700 Albany Street, Boston, MA 02118, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 7.61 kDa 
• Atom Count: 537 
• Modeled Residue Count: 67 
• Deposited Residue Count: 67 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
VILLIN HEADPIECE DOMAIN	A	67	Gallus gallus	Mutation(s): 0
UniProt
Find proteins for P02640 (Gallus gallus) Explore P02640  Go to UniProtKB:  P02640

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 31 
• Conformers Submitted: 1 
• Selection Criteria: no NOE violation > 0.3, no angle violations greater than 5 degrees 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-12-29 
Deposition Author(s): Vardar, D., Buckley, D.A., Frank, B.S., McKnight, C.J.

Revision History  

• Version 1.0: 1999-12-29
  Type: Initial release
  
• Version 1.1: 2007-10-16
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations
• Version 1.4: 2024-05-22
  Changes: Data collection