1VFQ | pdb_00001vfq

The Crystal Structure of Human Coactosin-like Protein at 1.9 A Resolution

• PDB DOI: https://doi.org/10.2210/pdb1VFQ/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-04-19 Released: 2005-01-25 
• Deposition Author(s): Li, X., Liu, Y., Liu, X., Lou, Z.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 
  0.218 (Depositor), 0.218 (DCC) 
• R-Value Work: 
  0.166 (Depositor), 0.166 (DCC) 
• R-Value Observed: 
  0.168 (Depositor) 

Literature

Crystal structure of human coactosin-like protein at 1.9 A resolution

Li, X., Liu, X., Lou, Z., Duan, X., Wu, H., Liu, Y., Rao, Z.

(2004) Protein Sci 13: 2845-2851

• PubMed: 15459340 
• DOI: https://doi.org/10.1110/ps.04937304
• Primary Citation Related Structures: 
  1VFQ


• PubMed Abstract: 
  

  Human coactosin-like protein (CLP) shares high homology with coactosin, a filamentous (F)-actin binding protein, and interacts with 5LO and F-actin. As a tumor antigen, CLP is overexpressed in tumor tissue cells or cell lines, and the encoded epitopes can be recognized by cellular and humoral immune systems. To gain a better understanding of its various functions and interactions with related proteins, the crystal structure of CLP expressed in Escherichia coli has been determined to 1.9 A resolution. The structure features a central beta-sheet surrounded by helices, with two very tight hydrophobic cores on each side of the sheet. CLP belongs to the actin depolymerizing protein superfamily, and is similar to yeast cofilin and actophilin. Based on our structural analysis, we observed that CLP forms a polymer along the crystallographic b axis with the exact same repeat distance as F-actin. A model for the CLP polymer and F-actin binding has therefore been proposed.

---

Organizational Affiliation: 
• National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, People's Republic of China.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 16.05 kDa 
• Atom Count: 1,162 
• Modeled Residue Count: 132 
• Deposited Residue Count: 143 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Coactosin-like protein	A	143	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q14019 (Homo sapiens) Explore Q14019  Go to UniProtKB:  Q14019
PHAROS:  Q14019 GTEx:  ENSG00000103187

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free:  0.218 (Depositor), 0.218 (DCC) 
• R-Value Work:  0.166 (Depositor), 0.166 (DCC) 
• R-Value Observed: 0.168 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 25.61	α = 90
b = 55.158	β = 95.96
c = 37.426	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-01-25 
Deposition Author(s): Li, X., Liu, Y., Liu, X., Lou, Z.

Revision History  

• Version 1.0: 2005-01-25
  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: 2023-12-27
  Changes: Data collection, Database references