Pin1, also known as peptidyl-prolyl cis-trans isomerase NIMA-interacting1, is nuclear PPIase containing a WW protein interaction domain, and is structurally and functionally related to Ess1/Ptf1, an essential protein in budding yeast. Pin1 is thus an essential PPIase that regulates mitosis presumably by interacting with NIMA and attenuating its mitosis-promoting activity. Substrates of Pin1 include the mitotic regulators (Cdc25 phosphatase and NIMA, PLK I, Wee, and Myt1 kinases), several transcription factors like beta-Catenin, c-Jun, and the tumor suppressor protein p53, and some specific proteins like the RNA Pol II, the cytoskeleton protein tau, and the G1/S protein Cyclin D1. Source: Recombinant protein corresponding to aa1-165 from mouse PIN1, fused to His-Tag at N-terminal, expressed in E. coli. Molecular Weight: ~20.8kD (188aa), confirmed by MALDI-TOF Endotoxin: <1EU/1ug (determined by LAL method) Biological Activity: Specific activity is >1200nmol/min/mg, and is defined as the amount of enzyme that cleaves 1nmole of suc-AAFP-PNA/minute at 37C in Tris-HCl pH 8.0 using chymotrypsin. Amino Acid Sequence: MGSSHHHHHH SSGLVPRGSH MGSMADEEKL PPGWEKRMSR SSGRVYYFNH ITNASQWERP SGGSTVGGSS KNGQGEPAKV RCSHLLVKHS QSRRPSSWRQ EKITRSKEEA LELINGYIQK IKSGEEDFES LASQFSDCSS AKARGDLGPF SRGQMQKPFE DASFALRTGE MSGPVFTDSG IHIILRTE Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing.. Store at -20C. Aliquots are stable for 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
