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Pr thermcontrol v2

Manufactured by NanoTemper

PR.ThermControl v2.0.4 is a lab equipment product by NanoTemper. It is a temperature control device that regulates and monitors the temperature of samples during experiments.

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9 protocols using pr thermcontrol v2

1

Thermal Stability Evaluation of PPP2R1A

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The thermal stability of PPP2R1A in both NMR and ITC buffers with different percentage of DMSO (from 0% to 40%) was evaluated by following the changes in the intrinsic fluorescence ratio (350/330 nm) as a function of the temperature. The experiments were run in a Prometheus NT.48 nanoDSF (NanoTemper Technologies). Ten microliters of the protein samples at 10 μM were measured in triplicates with a temperature ramp set to 1°C/min from 20°C to 80°C using standard treated capillaries (NanoTemper Technologies (#PR‐C002)). The PR. ThermControl v2.1.6 software (NanoTemper Technologies) was used for data acquisition and data analysis.
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2

Thermal Stability of PPP2R1A Protein

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The thermal stability of PPP2R1A in both NMR and ITC buffers with different percentage of DMSO (from 0% to 40%) was evaluated by following the changes in the intrinsic fluorescence ratio (350/330 nm) as a function of the temperature. The experiments were run in a Prometheus NT.48 nanoDSF (NanoTemper Technologies). 10 μl of the protein samples at 10 μM were measured in triplicates with a temperature ramp set to 1 °C/min from 20 °C-80 °C using standard treated capillaries (NanoTemper Technologies (#PR-C002)). The PR.ThermControl v2.1.6 software (NanoTemper Technologies) was used for data acquisition and data analysis.
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3

Thermal Stability Analysis of Proteins

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Measurements were performed in triplicates on a Prometheus NT.48 (NanoTemper), at 0.2 mg/ml, between 20 and 95 °C. Data was exported using PR.ThermControl v2.0.4 (NanoTemper), and fitted using Eq. 2 as described above. Tonset was calculated using MoltenProt at the eSPC online data analysis platform 37 (link),59 (link).
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4

Characterizing Protein Thermal Stability via NanoDSF

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Nano Differential Scanning Fluorescence (NanoDSF) was performed with a Prometheus NT.48 instrument (NanoTemper Technologies GmbH, München, Germany). Purified OhLys variants (in either 250 mM Na-acetate, pH 4.7, or 20 mM tris(hydroxymethyl)aminomethane, pH 8.0) were loaded into nanoDSF standard grade capillaries (NanoTemper Technologies GmbH; catalogue number PR-C002) through capillary action. Three capillaries were filled for each sample. The capillaries were then placed into the instrument (up to 48 single capillaries can be loaded in a single run) and the laser intensity required for optimum signal generation was determined. The samples were run with the following experimental setting: temperature slope 2 °C/minute, start temperature 20 °C and end temperature 95 °C. The data were analysed using the software supplied with the instrument (PR.ThermControl v2.0.4, NanoTemper Technologies GmbH) and the Tm (for the ratio 350 nm/330 nm).
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5

Nanodifferential Scanning Fluorimetry for Protein Stability

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The nanodifferential scanning fluorimetry (nanoDSF) is based on intrinsic
protein fluorescence using aromatic residues (tryptophan, tyrosine).
nanoDSF measures the changes in the intrinsic fluorescence intensity
ratio (350:330 nm), as a function of temperature.
The Prometheus
NT.48 instrument (NanoTemper Technologies) was used to determine the
melting temperatures of SLC15A4 in the presence and absence of compounds.
The capillaries (high sensitivity) were filled with 10 μL of
sample containing 0.2 mg mL–1 SLC15A4 diluted in
purification buffer (refer to protein purification). A temperature
gradient of 1 °C min–1 from 25 °C to 85
°C was applied, and the ratio of intrinsic protein fluorescence
at 350:330 nm was recorded. Small molecules were added to the final
concentration of 50 μM with a DMSO content of 5% (v/v). Protein
stability was not affected by DMSO additions up to 6% (v/v). Apo protein
was measured in quadruplets, and all measurements containing compounds
were performed in duplicate. A control compound was included during
every assay run to monitor the assay performance. The protein stabilization
upon small molecule addition was recorded as dTm in °C [Tm(compound) – Tm(apo)]. The nanoDSF data analysis was performed
using PR.ThermControl v2.0.4 software (NanoTemper Technologies).
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6

Thermal Stability Profiling of Muramidases

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Nano Differential Scanning Fluorescence (nanoDSF) was performed on eight of the muramidases with a Prometheus NT.48 instrument (NanoTemper Technologies GmbH, München, Germany). Purified samples (in either 50 mM Na-acetate, pH 3.0, or 50 mM Na-acetate, pH 5.0) were loaded into nanoDSF standard grade capillaries (NanoTemper Technologies GmbH) through capillary action. Three capillaries were filled for each sample, placed into the instrument (up to 48 single capillaries can be loaded in a single run) and the laser intensity required for optimum signal generation was determined. The samples were run with the following experimental setting: temperature slope 2°C/minute, start temperature 20°C and end temperature 95°C. The data were analysed using the software supplied with the instrument (PR.ThermControl v2.0.4, NanoTemper Technologies GmbH) and the melting point, Tm (°C), (for the ratio 350 nm/330 nm) was determined.
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7

Thermal Stability of LDHD Mutants

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The protein solution (wild-type and mLDHD mutants) was diluted with the storage buffer to a concentration of 1 mg/ml. The sample (50 μl) was loaded with high precision quartz glass capillary (Shanghai Yuanyi Biotechnology). Protein thermostability was determined using a Prometheus NT.48 instrument (NanoTemper Technologies). The temperature range was 25–95 °C with a rise of 1 °C per min. Fluorescence intensities were measured at 330 nm and 350 nm. Data were analyzed using PR.ThermControl v2.3.1 (NanoTemper Technologies). All experiments were performed in triplicates using distinct samples, and the Tm values were the averages of the triplicate measurements with the standard errors.
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8

Thermal Denaturation Assay of p110α/p85α

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Thermal denaturation was followed using intrinsic protein fluorescence measured with the NanoTemper Prometheus NT48 instrument (Nanotemper Technologies, München, Germany). Samples in HBS-P (Cytiva) supplemented with 5% (v/v) DMSO containing 3 μM full length p110α/p85α and a 1:2 dilution series of 1938 (from 440 μM to 13.8 nM) were loaded into standard capillaries and heated at 2 °C/min from 15 to 95 °C. The first derivative of the fluorescence emission ratio 350/330 nm were analyzed using the PR.ThermControl v2.3.1 (NanoTemper), to define the Tm. Independent experiments using the same protein and compound stocks were performed in triplicate. Data were fitted using Prism 9.4.1 (GraphPad Software Inc). Dissociation constants were calculated using fits to a single-site ligand depletion model: T=T0+(T1T0){([CT]+[PT]+[KD])([CT]+[PT]+KD)24[CT][PT]}2[PT] where T0 and T1 are the Tm in the absence of titrating compound and at saturation respectively, [PT] and [CT] are the total concentrations of protein and compound respectively and KD is the dissociation constant.
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9

Thermal Denaturation Assay of p110α/p85α

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Thermal denaturation was followed using intrinsic protein fluorescence measured with the NanoTemper Prometheus NT48 instrument (Nanotemper Technologies, München, Germany). Samples in HBS-P (Cytiva) supplemented with 5% (v/v) DMSO containing 3 μM full length p110α/p85α and a 1:2 dilution series of 1938 (from 440 μM to 13.8 nM) were loaded into standard capillaries and heated at 2 °C/min from 15 to 95 °C. The first derivative of the fluorescence emission ratio 350/330 nm were analyzed using the PR.ThermControl v2.3.1 (NanoTemper), to define the Tm. Independent experiments using the same protein and compound stocks were performed in triplicate. Data were fitted using Prism 9.4.1 (GraphPad Software Inc). Dissociation constants were calculated using fits to a single-site ligand depletion model: T=T0+(T1T0){([CT]+[PT]+[KD])([CT]+[PT]+KD)24[CT][PT]}2[PT] where T0 and T1 are the Tm in the absence of titrating compound and at saturation respectively, [PT] and [CT] are the total concentrations of protein and compound respectively and KD is the dissociation constant.
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