Millipore has a broad and continuously expanding portfolio of recombinant proteins. This portfolio includes more than 350 active, inactive and unactivated kinases, phosphatases and the largest available selection of disease relevant mutants. All of our enzymes are available in quantities sufficient for routine testing, as well as high throughput screening.
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This gene encodes a member of the Ca2+/calmodulin-dependent protein kinase 1 subfamily of serine/threonine kinases. The encoded protein may be involved in the regulation of granulocyte function through the chemokine signal transduction pathway. Alternatively spliced transcript variants encoding different isoforms of this gene have been described.
FUNCTION: SwissProt: Q8IU85 # Calcium/calmodulin-dependent protein kinase belonging to a proposed calcium-triggered signaling cascade. May regulate calcium-mediated granulocyte function. May play a role in apoptosis of erythroleukemia cells. Activates MAP kinase MAPK3 (By similarity). In vitro, phosphorylates transcription factor CREM isoform Beta and probably CREB1. SIZE: 385 amino acids; 42914 Da SUBCELLULAR LOCATION: Cytoplasm (Probable). Nucleus (Probable). Note=Predominantly cytoplasmic (Probable). Also nuclear upon activation (Probable). TISSUE SPECIFICITY: Broadly expressed. Highly and mostly expressed in polymorphonuclear leukocytes (neutrophilic and eosinophilic granulocytes) while little or no expression is observed in monocytes and lymphocytes. DOMAIN:SwissProt: Q8IU85 The autoinhibitory domain overlaps with the calmodulin binding region and interacts in the inactive folded state with the catalytic domain as a pseudosubstrate (By similarity). SIMILARITY: Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. CaMK subfamily. & Contains 1 protein kinase domain.
Stable for 6 months at -70°C from date of shipment. Upon first use, rapidly thaw the vial under cold water and immediately place on ice. Aliquot unused material into pre-chilled microcentrifuge tubes and immediately snap-freeze the vials in liquid nitrogen prior to re-storage at -70deg;C.
What is the best way to store and thaw enzymes?
» Answer
In order to maintain activity of enzymes, we recommend a slow thaw and aliquot storage. To do this, remove the full vial from the freezer and place under cold running tap water. Once thawed, place the vial on ice, gently mix, than make aliquots. Using liquid nitrogen or an ethanol/dry ice bath, flash freeze the aliquots. Store aliquots at the recommended temperature.
What type of buffer is best for lysis when attempting to preserve a protein?
» Answer
The best buffer is Buffer A. It is composed of 50mM Tris/HCl, pH 7.5, 1mM EGTA, 1mM EDTA, 1mM Sodium Orthovanadate (activated), 10mM Na B-glycerolphosphate, 50mM NaF, 5mM Na pyrophosphate, 1% w/v Triton X-100, 0.1% w/v 2-mercaptoethanol, 1ug/ml each of aprotinin, leupeptin and pepstatin, 1mM PMSF and 1mM microcystin (this is optional). QS with water. You may store Buffer A in aliquots at -20°C for 6 months.
Why is it important to shake the reaction mixture during the incubations?
» Answer
It is important to shake the reaction mixture during incubations so that the substrate and the enzyme get good interaction. If you do not have access to a shaking incubator, use a water bath for the incubations, removing the tubes regularly to vortex.