Recombinant Human Active ROCK1 Protein, CF Summary
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Supplied in 50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 10 mM Glutathione, 0.1 mM EDTA, 0.25 mM DTT, 0.1 mM PMSF, and 25% Glycerol.|
|Shipping||The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||This product is stable at ≤ ‑70 °C for up to 1 year from the date of receipt. For optimal storage, aliquot into smaller quantities after centrifugation and store at recommended temperature. Avoid repeated freeze-thaw cycles.|
- Active Kinase - Active ROCK1 (0.1 μg/μL) diluted with Kinase Dilution Buffer X (1X) and assayed as outlined in Figure 2. Note: These are suggested working dilutions and it is recommended that the researcher perform a serial dilution of active ROCK1 for optimal results.
- Kinase Assay Buffer III (5X) - 200 mM Tris-HCl, pH 7.4, 100 mM MgCl2, and 0.5 mg/mL BSA. Add fresh DTT prior to use to a final concentration of 250 μM.
- Kinase Dilution Buffer IX (1X) - Kinase Assay Buffer III diluted at a 1:4 ratio (5X dilution) with cold water. Add fresh DTT to the aliquot prior to use to a final concentration of 50 μM.
- ADP-Glo™ Kinase Assay Kit - 10 mM ATP Solution, 10 mM ADP Solution, ADP-Glo™ Reagent, and Kinase Detection Reagent.
- Substrate - S6K synthetic peptide substrate (KRRRLASLR) diluted in distilled water to a final concentration of 1 mg/mL.
- Thaw the Active ROCK1, Kinase Assay Buffer III (5X), and Substrate on ice. Prepare a 15 μL enzyme dilution with Kinase Dilution Buffer IX (1X), in a pre-chilled 96-well plate.
- Prepare a Substrate/ATP mixture as follows (25 μM
a. 10 mM ATP Solution: 1 μL
b. Kinase Assay Buffer III (5X): 79 μL
c. Substrate at 1 mg/mL: 80 μL
- Transfer the following reaction components prepared in Step 2
to a 384-well opaque plate bringing the reaction volume up to 5
a. 3 μL of diluted Active ROCK1
b. 2 μL of Substrate/ATP mix as prepared in Step 2. This initiates the reaction.
- Set up the blank control as outlined in Step 2, excluding the addition of the kinase. Replace the kinase with an equal volume of Kinase Dilution Buffer IX (1X).
- Incubate at ambient temperature for 40 minutes.
- After the 40 minute incubation period, terminate the reaction and deplete the remaining ATP by adding 5 μL of ADP-Glo™ Reagent. Spin down and shake the 384-well plate. Then incubate the reaction mixture for another 40 minutes at ambient temperature.
- Add 10 μL of the Kinase Detection Reagent to the 384-well plate and incubate the reaction mixture for another 30 minutes at ambient temperature.
- Read the 384-well reaction plate using the Luminescence Module Protocol on a GloMax®-Multi Microplate Multimode Reader.
- Determine the corrected activity (RLU) by removing the blank control
value (see Step 4) for each sample and calculate the kinase specific activity
as outlined below.
Calculation of Specific Activity of ADP (RLU/pmol)
From ADP standard curve, determine RLU/pmol of ADP
Kinase Specific Activity (SA) (pmol/min/μg or nmol/min/mg)
Corrected RLU from reaction / [(SA of ADP in RLU/pmol) x (Reaction time in min) x (Enzyme amount in μg or mg)]
The approximate molecular weight is 85 kDa and the purity is > 80%.
ROCK1 is a ubiquitously expressed serine/threonine kinase that is a downstream target of the small GTPase RhoA. ROCK1 is involved in diverse cellular functions, including smooth muscle contraction, actin cytoskeleton organization, cell adhesion and motility, and gene expression (1). ROCK1 contributes to the development of cardiac fibrosis and induction of fibrogenic cytokines in cardiomyocytes in response to pathological stimuli. ROCK1 knockout mice exhibit reduced perivascular and interstitial fibrosis, which is associated with reduced expression of a variety of extracellular matrix (ECM) proteins and fibrogenic cytokines (2).
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