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HTRF Human and Mouse Total AMPK Detection Kit, 500 Assay Points

The total AMPK kit is designed to monitor the level of cellular AMP-activated protein kinase and can be used as a normalization assay for the phospho AMPK kit.

For research use only. Not for use in diagnostic procedures. All products to be used in accordance with applicable laws and regulations including without limitation, consumption & disposal requirements under European REACH regulations (EC 1907/2006).
Product Variants
Part number: 63ADK060PEG
Unit Size: 500 Assay Points
List price: USD 2,147.00
Your price:
USD 2,147.00
USD 2,147.00 /each
Part number: 63ADK060PEH
Unit Size: 10,000 Assay Points
List price: USD 12,490.00
Your price:
USD 0.00
USD 12,490.00 /each

Overview

5' AMP-activated protein kinase (AMPK) is considered the metabolic master switch. AMPK is activated by phosphorylation on Thr172 by CaMKK2 and LKB1, among others. Upon activation, it inhibits synthesis of fatty acids, cholesterol, and triglycerides, and activates fatty acid uptake and ß-oxidation as well as stimulating glucose uptake. AMPK is also involved in autophagy activation through direct phosphorylation of ULK1. Revvity's cell-based homogeneous HTRF kit for total AMPK enables the detection of the AMPK expression level, and is used as a normalization assay with our phospho-AMPK (Thr172) kit.

Specifications

Assay Points
500
Assay Target Type
Kit
Assay Technology
HTRF
Brand
HTRF
Quantity
1
Therapeutic Area
Metabolism/Diabetes
NASH/Fibrosis
Unit Size
500 Assay Points

Video gallery

How it works

Phospho-BTK (Tyr223) assay principle

The Phospho-BTK (Tyr223) assay measures BTK when phosphorylated at Tyr223. Contrary to Western Blot, the assay is entirely plate-based and does not require gels, electrophoresis or transfer. The Phospho-BTK (Tyr223) assay uses 2 labeled antibodies: one with a donor fluorophore, the other one with an acceptor. The first antibody is selected for its specific binding to the phosphorylated motif on the protein, the second for its ability to recognize the protein independent of its phosphorylation state. Protein phosphorylation enables an immune-complex formation involving both labeled antibodies and which brings the donor fluorophore into close proximity to the acceptor, thereby generating a FRET signal. Its intensity is directly proportional to the concentration of phosphorylated protein present in the sample, and provides a means of assessing the protein’s phosphorylation state under a no-wash assay format.

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Phospho-BTK (Tyr223) 2-plate assay protocol

The 2 plate protocol involves culturing cells in a 96-well plate before lysis then transferring lysates to a 384-well low volume detection plate before adding Phospho-BTK (Tyr223) HTRF detection reagents. This protocol enables the cells' viability and confluence to be monitored.

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Phospho-BTK (Tyr223) 1-plate assay protocol

Detection of Phosphorylated BTK (Tyr223) with HTRF reagents can be performed in a single plate used for culturing, stimulation and lysis. No washing steps are required. This HTS designed protocol enables miniaturization while maintaining robust HTRF quality.

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Assay validation

HTRF vs WB using phospho & total BTK assay on human K562 cells

Human erythroleukemic K562 cells were cultured for 2 days at 37°C, 5% CO2. After lysis and centrifugation, pelleted cells were resuspended in FBS-free medium treated with 100 µM pervanadate for 20 minutes. Cells were then lysed with and soluble supernatants were collected after a 10 minute centrifugation. Serial dilutions of the cell lysate were indicated the 2 HTRF assays for either phospho or total BTK detections are 16-fold more sensitive than Western Blot.

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Accumulation of total & phospho-BTK in B-cell lymphoma line Raji

Using the two-plate assay protocol, human B-cell lymphoma line Raji cells were plated at 200,000 cells/ well in a half 96 well plate in 20 µl of FBS-free culture medium. After treatment for 20 minutes at 37°C (in triplicate) with 10µL of pervanadate at diffent concentrations , cells were lysed with 10 µL of supplemented lysis buffer #1 (4X) for 30min at RT under gentle shaking. 16 µL of lysate were transferred into a 384-well low volume white microplate with 4 µL of the pre-mix detection antibodies. The HTRF signal was recorded after an overnight incubation.

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Inhibitory effect of Ibrutinib on the phosphorylation of BTK

Human Erythroleukemic K562 cells and Human lymphoma B-cell Raji cells were plated respectively at 100 kcells/well & 200 kcells/well under 20µl of FBS-free culture medium in a half-96 well plate. After treatment for 2 hours at 37°C with 5 µL of increasing concentrations of Ibrutinib, 5 µL of 50µM pervanadate were added for 20 min at 37°C. Cells were then lysed with 10 µL of supplemented lysis buffer #1 (4X) for 30min at RT under gentle shaking. 16 µL of lysate were transferred into a 384-well low volume white microplate with 4 µL of the pre-mix detection antibodies. The HTRF signal was recorded after an overnight incubation.

assay-validation-btk-phospho-y223-7.svg

 

Inhibitory effect of P505-15 on the phosphorylation of BTK

Human Erythroleukemic K562 cells and Human lymphoma B-cell Raji cells were plated respectively at 100 kcells/well & 200 kcells/well under 20µl of FBS-free culture medium in a half-96 well plate. After treatment for 2 hours at 37°C with 5 µL of increasing concentrations of P505-15, 5 µL of 50µM pervanadate were added for 20 min at 37°C. Cells were then lysed with 10 µL of supplemented lysis buffer #1 (4X) for 30min at RT under gentle shaking. 16 µL of lysate were transferred into a 384-well low volume white microplate with 4 µL of the pre-mix detection antibodies. The HTRF signal was recorded after an overnight incubation.

assay-validation-btk-phospho-y223-8.svg

 

Simplified pathway

BTK Simplified Pathway

BTK is a Cytoplasmic tyrosine kinase that's primarily expressed in B cells. It is involved in multiple signal-transduction pathways regulating survival, activation, proliferation, and differentiation of B-lineage lymphoid cells. Initiation of BCR signaling involves Lyn and Syk, part of the Src family. Lyn phosphorylates the intracellular domain of the BCR, leading to the recruitment and phosphorylation of Syk, and eventually, SLP65 phosphorylation. This leads to the recruitment and phosphorylation of BTK at Tyr551 and in turn, BTK autophosphorylates at Tyr223 for its full activation.

phospho-pathway-btk-63adk017peg-63adk017peh-9.svg

 

Resources

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Guide
HTRF solutions, guide to major applications

This guide provides you an overview of HTRF applications in several therapeutic areas.

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SDS, COAs, Manuals and more

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