NanoTemper Prometheus
The new gold standard for precise characterization of protein stability
Monitor stability of recombinant proteins during chromatographic isolation and purification
A system for every one of your needs, present or futureIt’s important to take into account your evolving needs for stability characterization and throughput. Choosing fully-featured Prometheus Panta gives you the peace of mind knowing you’ll be ready for projects that demand simultaneous, multi-parameter characterization. If having a path to automation is what you and your stakeholders have in mind, go with the Prometheus NT.Plex. |
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♦ Prometheus PantaChoose Prometheus Panta if you want everything under the sun in stability characterization, including thermal unfolding, particle sizing, and aggregation. |
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♦ Prometheus NT.PlexYour best bet when you want an easy path to automation. Get thermal unfolding and chemical denaturation with optional backreflection for aggregation evaluation. |
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♦ Prometheus NT.48Start here for thermal unfolding and chemical denaturation with optional backreflection for aggregation evaluation. |
Prometheus NT.Plex plus NT.Robotic AutosamplerAdd NT.Robotic Autosampler to transform Prometheus NT.Plex into a system that increases your throughput with unattended operation. It’s a stand-alone, all-inclusive system with robotic arm, computer, and monitor. Analyze up to 1,536 samples for hands-free characterization of thermal unfolding and chemical denaturation in a single experiment. Incorporate plate temperature control to keep your samples at 4 to 20 °C while they wait in the queue. And, include aggregation detection optics to get you complete stability characterization.
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nanoDSF |
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When is it useful? |
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What does it do? |
For monitoring protein purification, evaluating target-ligand complexes before affinity-based screening, or monitoring stability during biologics formulation, developability, production, and manufacturing |
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It measures thermal unfolding or chemical denaturation under native conditions and label-free by detecting changes in its intrinsic fluorescence during a thermal ramp or in the presence of a chemical denaturant |
DLS |
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When is it useful? |
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What does it do? |
For screening recombinant proteins expressed from different constructs, biologics formulation screening, sample optimization for biophysical assays, and characterization of self-interactions |
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It detects molecule aggregates to determine the size of proteins over a wide concentration range |
Backreflection |
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When is it useful? |
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What does it do? |
Anytime you’re looking at aggregates larger than 12.5 nm radius |
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It determines aggregation status by measuring light intensity loss due to scattering |
SLS |
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When is it useful? |
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What does it do? |
For determining if complexes have formed, measuring how much genetic material a viral vector contains, or extrapolating how proteins will interact with themselves at high concentrations. |
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It looks at the overall average scattering intensity of your solution and correlates that to the molecular weight of your particles. |
Tm |
The unfolding transition temperature is the point at which 50% of the protein is unfolded. Proteins with a higher Tm are more stable because a greater input of energy is required to reach the unfolding transition. Because Tm is an accurate and established metric for assessing protein stability, it’s an essential parameter to determine. |
Tonset |
The detectable temperature at which a protein begins to unfold. Particularly in temperature-sensitive situations, it’s important to understand when a protein will denature and lose its activity. |
Prometheus monitors the intrinsic fluorescence signal of proteins as a measure of their folding state. Fluorescence intensity at a single wavelength (350 or 330 nm) or the F350/330 ratio are plotted against increasing temperature or concentrations of a chemical denaturant to determine the Tm or Cm of a protein.
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Cm or C50 |
The concentration of a denaturant that causes 50% of proteins to unfold addresses the relationship between chemical denaturants and proteins. This parameter is useful when studying chemical effects, or when protein stability is tested using denaturants. |
ΔG and ΔΔG |
The Gibbs free energy of protein unfolding, is a thermodynamic measure of the likelihood a folding event may occur. For a given event, proteins with more negative ΔG are more likely to fold. ΔG also relates protein folding to changes in enthalpy and temperature. Changes in the Gibbs free energy are measured with ΔΔG, which shows the relative stability of a protein at various concentrations. |
rH |
The hydrodynamic radius tells how large or small a protein is in a solvated state, making it a biologically relevant parameter since it considers the protein size in the context of its environment. Monitoring the rH is a simple way to identify the oligomeric state of a protein in a preparation and can be implemented during production to identify relevant fractions of purified protein or to check batch to batch consistency of formulations. |
PDI |
The polydispersity index represents the distribution of size populations within a given sample. The numerical value of PDI ranges from 0.0 (for a perfectly uniform sample with respect to the particle size) to 1.0 (for a highly polydisperse sample with multiple particle size populations) |
kD and D0 |
The diffusion interaction parameter (kD) identifies the onset of protein unfolding and its impact on colloidal stability. Positive kD values are a sign of repulsive intermolecular interactions, while negative values indicate attraction. It can be utilized to compare different protein formulations, and use it to select more stable biomolecules.
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Compare size distribution, mean rH, and PDI to identify optimal buffer conditions for your sample and assess sample homogeneity before performing other time-consuming biophysical assays
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Tturbidity |
This is the temperature at which proteins exhibit a tendency to aggregate. Typically, the onset of turbidity correlates with the unfolding of proteins and can be a useful parameter for comparing colloidal stability. |
High level of specificity |
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Distinguish the signal of your biologic from the signal of the buffer or matrix |
High level of sensitivity |
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Identify samples and domains with subtle signals |
Broad limit of detection |
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Measure samples at both clinically and developmentally relevant concentrations, including both high and low concentrations |
Accuracy |
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Report true Tms |
Precision |
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Provide reliable results that consistently return the same value with little error consistent and reliable results with small standard deviations or errors that do not vary from day-to-day |
High resolution |
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Detect multiple unfolding events discriminates domains with similar Tms |