E3-160

Material Data Sheet

Parkin

Price: $349.00
Catalog #: E3-160

Parkin

Price: 
$349
Quantity: 
25 µg
Data Sheet: 

The E3 Ubiquitin ligase Parkin (encoded by the PARK2 gene) is an essential part of the cellular machinery that participates in the removal of damaged mitochondria.  Mutations in PARK2 are known to cause a form of Parkinson’s disease known as autosomal recessive juvenile Parkinson's disease (AR-JP), and the mechanisms by which defective Parkin ligase contributes to the dopaminergic cell death in this disease is an area of intense investigation.

Reported substrates for Parkin include BCL2, GPR37, MIRO1, MFN1, MFN2, TOMM20, USP30, and many others.  Parkin (an RBR-class Ubiquitin ligase) structures have recently been reported by multiple groups, and reveal that the ligase is folded upon itself to produce an auto-inhibited state.  The auto-inhibition is relieved by interactions with PINK1 kinase (which can phosphorylate both Parkin and Ubiquitin at serine residue number 65) and pS65 phospho-Ubiquitin by mechanisms that are under investigation.

In vitro, Parkin may be activated by treatment with recombinant PINK1, or addition of low concentrations of pS65-phosphoubiquitin.  Parkin has been reported to generate poly-Ubiquitin chains in K6, K11, K48, and K63 linkages both in vitro and in vivo.  This recombinant protein is untagged.

Product Information

Stock: 
X mg/ml (X µM) in 25 mM Tris-HCl pH 8.5, 200 mM NaCl, 0.03% Brij35, 10% (v/v) Glycerol,  5 mM TCEP
MW: 
52 kDa
Purity: 
≥ 90% by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie Blue Stain.

Use & Storage

Use: 

Reaction conditions will need to be optimized for each specific application.  As supplied, Parkin has negligible E3 ligase activity as determined by the lack of autoubiquitination in an in vitro assay.  Parkin ligase activity is greatly enhanced by phosphorylation with PINK1 kinase (AP-180) or by the addition of low concentrations of phosphorylated Ubiquitin (U-102). 

Storage: 

Store at -80°C. Avoid multiple freeze/thaw cycles.

Literature

References: 

Bingol, B. et al. (2014) Nature  510: 370

Ordureau, A. et al. (2014)  Mol. Cell  56: 360

Riley, B.E. et al. (2013)  Nat. Comm.  4: doi:10.1038/ncomms2982

Saraff, S.A. et al. (2013)  Nature  496: 372

Spratt, D.E. et al. (2013)  Nat. Comm.  4: doi:10.1038/ncomms2983

Trempe, J.F. et al. (2013) Science   340: 1451

Wauer T. et. al. (2015) Nature   524: 370

Wauer T. & Komander, D. (2013)  EMBO J  32:  2099