Sumo Protease Inhibition
Sumo Protease Inhibition - Related Videos
09:00
Use of the Protease Fluorescent Detection Kit to Determine Protease Activity
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Cited by 15 •
2009
The Protease Fluorescent Detection Kit is designed for the measurement of protease activity using fluorometry. It is also suitable for detection of trace amounts of protease contamination. The method is based on the proteolytic hydroysis of a proprietary formulation of a FITC-labeled casein substrate.
16:02
Quantitative FRET (Förster Resonance Energy Transfer) Analysis for SENP1 Protease Kinetics Determination
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Cited by 7 •
2013
A novel method involving quantitative analysis of FRET (Förster Resonance Energy Transfer) signals is described for studying enzyme kinetics. KM and kcat were obtained for the hydrolysis of the catalytic domain of SENP1 (SUMO/Sentrin specific protease 1) to pre-SUMO1 (Small Ubiquitin-like MOdifier). The general principles of this quantitative-FRET-based protease kinetic study can be applied to other proteases.
06:23
Localization of SUMO-modified Proteins Using Fluorescent Sumo-trapping Proteins
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Cited by 3 •
2019
SUMO is an essential and highly conserved, small ubiquitin-like modifier protein. In this protocol we are describing the use of a stress-tolerant recombinant SUMO-trapping protein (kmUTAG) to visualize native, untagged SUMO conjugates and their localization in a variety of cell types.
11:37
Sigma's Non-specific Protease Activity Assay - Casein as a Substrate
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Cited by 412 •
2008
Proteases break peptide bonds. In the lab, it is often necessary to measure and/or compare the activity of proteases. Sigma's non-specific protease activity assay may be used as a standardized procedure to determine the activity of proteases.
00:46
Feedback Inhibition
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2019
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell! Since enzymes help control the rate of reactions, their activity is regulated so that appropriate amounts of starting materials, intermediate metabolites, and products are maintained in the cell. Excessive build-up or depletion of...
FAQs
Inhibition shifts the balance toward retention of SUMO modifiers on cellular proteins because deconjugation is reduced. This can increase the persistence of SUMOylated forms without directly showing that SUMO attachment itself has increased. Comparing modified and unmodified protein states therefore helps researchers determine how removal, rather than addition, contributes to regulation of protein behavior.
Because SUMO attachment can be removed by SENPs, its regulatory effects are potentially dynamic rather than permanent. Suppressing removal allows researchers to examine consequences of maintaining SUMOylated states, including changes in protein stability, localization, interactions, or activity. This makes the approach useful for separating transient regulatory events from longer-lasting effects on cellular processes.
The two approaches affect different sides of the modification cycle. Sumo Protease Inhibition limits the removal of SUMO from existing cellular targets, whereas direct enhancement of conjugation would act on the attachment process. This distinction matters experimentally because preserved SUMOylation may reflect reduced deconjugation rather than increased delivery of SUMO to proteins.
Useful outcomes include altered protein stability, subcellular localization, molecular interactions, and activity. These readouts connect the biochemical effect of reduced deconjugation to cellular regulation. Examining several outcomes together is important because preserving SUMOylated proteins may influence where a target is found, which partners it contacts, and how it functions rather than producing only one measurable change.
An investigation generally compares cellular or molecular outcomes with SENP activity suppressed against an appropriate untreated or differently treated condition, then evaluates SUMO-related changes and their consequences. Researchers may assess protein stability, localization, interactions, or activity, depending on the question. The resulting comparison helps link altered SUMO deconjugation with a specific regulatory process.
It is useful when researchers need to determine whether reversible SUMO modification contributes to DNA repair or cell-cycle control. By preserving SUMOylated target proteins, the approach can reveal associations between SUMO signaling and pathway behavior. These experiments help clarify whether changes in modification status accompany altered regulation in these biologically important processes.
SENP inhibitors provide experimental tools for testing whether SUMO signaling influences disease-relevant cellular regulation. Researchers can use them to examine effects on transcription, DNA repair, stress responses, or cell-cycle pathways and then evaluate SUMO signaling as a possible research or therapeutic target. Such studies help establish biological relevance before considering broader therapeutic development.