1DYT

X-ray crystal structure of ECP (RNase 3) at 1.75 A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-Dimensional Crystal Structure of Human Eosinophil Cationic Protein (Rnase 3) at 1.75 A Resolution.

Mallorqui-Fernandez, G.Pous, J.Peracaula, R.Maeda, T.Tada, H.Yamada, H.Seno, M.De Llorens, R.Gomis-Rueth, F.X.Coll, M.

(2000) J.Mol.Biol. 300: 1297

  • DOI: 10.1006/jmbi.2000.3939
  • Also Cited By: 4X08, 4OXF

  • PubMed Abstract: 
  • Eosinophil cationic protein (ECP; RNase 3) is a human ribonuclease found only in eosinophil leukocytes that belongs to the RNase A superfamily. This enzyme is bactericidal, helminthotoxic and cytotoxic to mammalian cells and tissues. The protein has ...

    Eosinophil cationic protein (ECP; RNase 3) is a human ribonuclease found only in eosinophil leukocytes that belongs to the RNase A superfamily. This enzyme is bactericidal, helminthotoxic and cytotoxic to mammalian cells and tissues. The protein has been cloned, heterologously overexpressed, purified and crystallized. Its crystal structure has been determined and refined using data up to 1. 75 A resolution. The molecule displays the alpha+beta folding topology typical for members of the ribonuclease A superfamily. The catalytic active site residues are conserved with respect to other ribonucleases of the superfamily but some differences appear at substrate recognition subsites, which may account, in part, for the low catalytic activity. Most strikingly, 19 surface-located arginine residues confer a strong basic character to the protein. The high concentration of positive charges and the particular orientation of the side-chains of these residues may also be related to the low activity of ECP as a ribonuclease and provides an explanation for its unique cytotoxic role through cell membrane disruption.


    Organizational Affiliation

    Institut de Biologia Molecular de Barcelona, C.I.D-C.S.I.C, Jordi Girona, 18-26, Barcelona, 08034, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EOSINOPHIL CATIONIC PROTEIN
A, B
133Homo sapiensMutation(s): 0 
Gene Names: RNASE3 (ECP, RNS3)
EC: 3.1.27.-
Find proteins for P12724 (Homo sapiens)
Go to Gene View: RNASE3
Go to UniProtKB:  P12724
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT

Download SDF File 
Download CCD File 
A, B
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A, B
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.224 
  • Space Group: P 43 2 2
Unit Cell:
Length (Å)Angle (°)
a = 62.163α = 90.00
b = 62.163β = 90.00
c = 174.590γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-08
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance