Rat recombinant PTP1B Protein tyrosine phosphatase, also known as PTPN1 (Genbank accession No. NM_012637.2), a.a. 1-321 (catalytic domain), with N-terminal GST-tag, MW=63.3 kDa, expressed in an E. coli expression system.
Unit definition: One unit will hydrolyze 1 nmol p-nitrophenyl phosphate per minute at pH 7.4 and 30°C.
Background
Protein tyrosine phosphatase nonreceptor, type 1 (PTPN1) is the founding member of the protein tyrosine phosphatase (PTP) family. PTPN1 catalyze the hydrolysis of the phosphate monoesters specifically from tyrosine residues. PTPN1 is known to be involved in signaling pathways that regulate a variety of cellular processes including cell growth and oncogenic transformation. PTPN1 also has been shown to act as a negative regulator of insulin signaling. PTPN1 has also been reported to dephosphorylate epidermal growth factor receptor kinase, which implicated the role of this phosphatase in cell growth control and cell response to interferon stimulation.
Immunogen Region
1-321
Tag
N-terminal GST-tag
Formulation
25 mM Tris-HCl, 75 mM NaCl, pH 8.0, 0.05% Tween-20, 10 mM glutathione, 1 mM DTT and 50% glycerol
Species
Rat
Application
Useful for the study of enzyme kinetics and regulation, to dephosphorylate target substrates and for screening inhibitors.
Notes
The activity of rat PTP1B was determined using pNPP. Assay conditions: 50 mM HEPES, pH 7.4, 2 mM EDTA, 3 mM DTT, 100 mM NaCl, 20 mM pNPP, 5 minute incubation at 30°C, using 2 ug/ml enzyme.
Avoid freeze/thaw cycles.
GenBank
NM_012637.2
Mw(kda)
63.3 kDa
Synonyms
PTP1B, PTPN1, Protein tyrosine phosphatase 1B
Shipping Temperature
-80°C (dry ice)
Format
Aqueous buffer solution
Storage
>12 months at -80°C
Reference
1. Frangioni et al., Cell, 1992, 68: 545. 2. M. Elchebly et al., Science 1999, 283: 1544.