Name :
Recombinant Human PTP1B Protein (His Tag), HPLC-verified
Biological Activity :
Background :
PTP1B, also known as PTPN1, belongs to the protein-tyrosine phosphatase (PTP) family. PTPs catalyze the hydrolysis of the phosphate monoesters specifically on tyrosine residues. Members of the PTP family share a highly conserved catalytic motif, which is essential for the catalytic activity. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. PTP1B contains 1 tyrosine-protein phosphatase domain and is expressed in many tissues. PTP1B is localized to the cytoplasmic face of the endoplasmic reticulum. PTP1B was also reported to dephosphorylate epidermal growth factor receptor kinase, as well as JAK2 and TYK2 kinases, which implicated the role of PTP1B in cell growth control, and cell response to IFN stimulation.
Biological Activity :
Measured by its ability to dephosphorylate a phosphotyrosine residue in an EGF receptor (aa988-998) phosphopeptide substrate, R&D Systems, Catalog # ES006.The specific activity is > 15 nmoles/min/μg.
Expression Host :
Human
Source :
E. coli
Tag :
Protein Accession No. :
NP_002818.1
NCBI Gene ID :
Synonyms :
Synonyms :
protein tyrosine phosphatase, non-receptor type 1
Amino Acid Sequence :
Molecular Weight :
The recombinant human PTPN1 consisting of 327 amino acids and has a calculated molecular mass of 38.1 kDa.
Purity :
≥ 95 % as determined by SDS-PAGE. ≥ 95 % as determined by SEC-HPLC.
State of Matter :
Product Concentration :
Storage and Stability :
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Endotoxin Level :
Please contact us for more information.
Protein Construction :
A DNA sequence encoding the human PTPN1 (NP_002818.1) (Glu 2-Asn 321) was expressed, with a polyhistide tag at the N-terminus.
Buffer Solution :
Supplied as sterile 10mM Hepes, 150mM NaCl, 1mM DTT, pH 7.5.Please contact us for any concerns or special requirements.Please refer to the specific buffer information in the hardcopy of datasheet.
Shipping :
Kinases are highly recommended to be shipped at frozen temperature with blue ice or dry ice.Shipment made at ambient temperature may seriously affect the activity of the ordered products.
Redissolution :
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Synonyms :
PTP1B Protein, Human; PTPN1 Protein, Human PTP1B 背景信息 PTP1B, also known as PTPN1, belongs to the protein-tyrosine phosphatase (PTP) family. PTPs catalyze the hydrolysis of the phosphate monoesters specifically on tyrosine residues. Members of the PTP family share a highly conserved catalytic motif, which is essential for the catalytic activity. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. PTP1B contains 1 tyrosine-protein phosphatase domain and is expressed in many tissues. PTP1B is localized to the cytoplasmic face of the endoplasmic reticulum. PTP1B was also reported to dephosphorylate epidermal growth factor receptor kinase, as well as JAK2 and TYK2 kinases, which implicated the role of PTP1B in cell growth control, and cell response to IFN stimulation.
References & Citations :
Frangioni JV, et al. (1992) The nontransmembrane tyrosine phosphatase PTP-1B localizes to the endoplasmic reticulum via its 35 amino acid C-terminal sequence. Cell. 68(3):545-60.Zhu S, et al. (2007) PTP1B contributes to the oncogenic properties of colon cancer cells through Src activation. Cancer Res. 67(21):10129-37.Aoki N, et al. (2000) A cytosolic protein-tyrosine phosphatase PTP1B specifically dephosphorylates and deactivates prolactin-activated STAT5a and STAT5b. J Biol Chem. 275(50):39718-26.Stuible M, et al. (2008) PTP1B regulates cortactin tyrosine phosphorylation by targeting Tyr446. J Biol Chem. 283(23):15740-6.
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