539735

PTP1B, Human, Recombinant, E. coli

• Synonym(e): Protein Tyrosine Phosphatase 1B
• UNSPSC-Code: 12352202
• NACRES: NA.77

Eigenschaften

• Biologische Quelle: human
• Qualitätsniveau: 100
• Rekombinant: expressed in E. coli
• Assay: ≥90% (SDS-PAGE)
• Form: liquid
• Spezifische Aktivität: ≥20 U/mg
• Mol-Gew.: 37,400 g/mol
• Hersteller/Markenname: Calbiochem^®
• Lagerbedingungen: OK to freeze; avoid repeated freeze/thaw cycles
• Versandbedingung: wet ice
• Lagertemp.: −70°C
• Angaben zum Gen: human ... PTP1B(5770)

Beschreibung

Allgemeine Beschreibung

Research area: Cell Signaling

Recombinant, human PTP1B expressed in E. coli. PTP1B, an ubiquitous nontransmembrane protein tyrosine phosphatase, was originally identified in human placenta. This highly active enzyme is useful for the study of tyrosine phosphatase kinetics, substrate specificity, and for screening inhibitors. PTP1B comprises three domains: an N-terminal catalytic domain (1–300), a regulatory domain (301–400), and a C-terminal domain (401–435) that is accountable for directing the enzyme to the endoplasmic reticulum (ER) membrane.

Anwendung

Protein tyrosine phosphatase 1B (PTP1B), Human, Recombinant, E. coli has been used in the dephosphorylation assay of Glutathione S-transferase (GST) fusion proteins as well as in the in vitro kinase assays. It has also been used to construct a 66-member PTP1B library for discovery of enzyme inhibitors using click chemistry.

Biochem./physiol. Wirkung

Protein tyrosine phosphatase 1B (PTP1B) serves as a crucial enzyme in dephosphorylating insulin receptor and its downstream signaling components. Furthermore, it participates in the negative regulation of the leptin signaling pathway by dephosphorylation of the upstream signaling molecules, leading to the suppression of the neuropeptide Y synthesis, an appetite-stimulating hormone. Improper functioning of PTP1B has been associated with a variety of human diseases, including cancer, diabetes, obesity and inflammation.

Verpackung

Please refer to vial label for lot-specific concentration.

Warnhinweis

Toxicity: Standard Handling (A)

Einheitendefinition

One unit is defined as the amount of enzyme that will hydrolyze 1 µmol of phosphopeptide substrate (Cat. No. 539737) per min at 30°C, pH 7.2 using 150 µM of substrate.

Physikalische Form

In 50 mM HEPES, 1 mM DTT, 1 mM EDTA, 0.05% NP-40, pH 7.2.

Rekonstituierung

Following initial thaw, aliquot and freeze (-70°C).

Sonstige Hinweise

Puius, Y.A., et al. 1997. Proc. Natl. Acad. Sci. USA94, 13420.
Liu, F., et al. 1996. J. Biol. Chem.271, 31290.

Rechtliche Hinweise

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Sicherheitshinweise

• Lagerklassenschlüssel: 12 - Non Combustible Liquids
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable