3TBJ

The 1.7A crystal structure of Actibind a T2 ribonucleases as antitumorigenic agents


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.154 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The 1.8 A crystal structure of ACTIBIND suggests a mode of action for T2 ribonucleases as antitumorigenic agents.

de Leeuw, M.Gonzalez, A.Lanir, A.Roiz, L.Smirnoff, P.Schwartz, B.Shoseyov, O.Almog, O.

(2012) J.Med.Chem. 55: 1013-1020

  • DOI: 10.1021/jm1015507

  • PubMed Abstract: 
  • ACTIBIND and its human homologue RNASET2 are T2 ribonucleases (RNases). RNases are ubiquitous and efficient enzymes that hydrolyze RNA to 3' mononucleotides and also possess antitumorigenic and antiangiogenic activities. Previously, we have shown tha ...

    ACTIBIND and its human homologue RNASET2 are T2 ribonucleases (RNases). RNases are ubiquitous and efficient enzymes that hydrolyze RNA to 3' mononucleotides and also possess antitumorigenic and antiangiogenic activities. Previously, we have shown that ACTIBIND and RNASET2 bind actin and interfere with the cytoskeletal network structure, thereby inhibiting cell motility and invasiveness in cancer and in endothelial cells. We also showed that ACTIBIND binds actin in a molar ratio of 1:2. Here, we further characterize ACTIBIND and determine its crystal structure at 1.8 Å resolution, which enables us to propose two structural elements that create binding sites to actin. We suggest that each of these binding sites is composed of one cysteine residue and one conserved amino acid region. These binding sites possibly interfere with the cytoskeleton network structure and as such may be responsible for the antitumorigenic and antiangiogenic activities of ACTIBIND and its human analogue RNASET2.


    Organizational Affiliation

    Department of Clinical Biochemistry, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Actibind
A
237Aspergillus nigerMutation(s): 0 
Gene Names: ACTIB-I
Find proteins for Q45U61 (Aspergillus niger)
Go to UniProtKB:  Q45U61
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.154 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 78.457α = 90.00
b = 78.457β = 90.00
c = 103.708γ = 120.00
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
SCALAdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-22
    Type: Initial release