General description
Research Area: Cell Signaling
The protein phosphatase encoded by bacteriophage λ (λPP) is part of a family of Ser/Thr phosphatases (Ser/Thr PPases), which includes eukaryotic protein phosphatases 1 (PP1), 2A (PP2A), and 2B (calcineurin).
Recombinant λ PPase expressed in E. coli. A 221-amino acid, Mn2+-dependent, protein phosphatase. Hydrolyzes phosphate groups on serine, threonine, tyrosine, or histidine residues. Inhibited by orthovanadate. Note: 1KU = 1,000 units.
Application
Protein Phosphatase, Lambda, Recombinant, E. coli is suitable for the detection of phospho-KRAS.
Biochem/physiol Actions
Protein phosphatases play a crucial role in embryonic development, metabolic homeostasis, stress responses, cell cycle transitions, and numerous other vital biological processes.
Physical form
In 100 mM NaCl, 50 mM HEPES, 2 mM DTT, 0.1 mM MnCl₂, 0.1 mM EGTA, 50% glycerol, 0.01% Brij® 35 Detergent, pH 7.5.
Preparation Note
Following initial thaw, aliquot and freeze (-70°C).
Further dilute in 50 mM Tris-HCl, pH 7.8, 5 mM DTT, 2 mM MnCl₂, and 100 µg/ml BSA.
Other Notes
One unit is defined as the amount of enzyme that will hydrolyze 1.0 nmol of pNPP per min at 30°C, pH 7.8. 20-200 Units will typically remove >95% of phosphates from serine/threonine residues in 0.1 nmol of protein in 30 min. 100-1000 Units will typically remove >95% of phosphates from tyrosine in 0.1 nmol of protein in 30 min.
Zhuo, S., et al. 1993. J. Biol. Chem.268, 17754.
Gordon, J.A. 1991. Methods Enzymol.201, 477.
Cohen, P.T.W. and Cohen, P. 1989. Biochem. J.260, 931.
Legal Information
Brij is a registered trademark of Croda International PLC
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Standard Handling (A)
| recombinant | expressed in E. coli |
| Quality Level | 100 |
| description | Activity (>= 400,000 units/mL) |
| assay | ≥95% (SDS-PAGE) |
| form | liquid |
| manufacturer/tradename | Calbiochem® |
| storage condition | OK to freeze,avoid repeated freeze/thaw cycles |
| foreign activity | Protease, none detected |
| shipped in | wet ice |
| storage temp. | −70°C |
