Endogenous Protein Depletion
Endogenous Protein Depletion - Related Videos
06:17
Depletion of Specific Cell Populations by Complement Depletion
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Cited by 15 •
2010
To effectively study the function of immune cell populations their purification is often required. Complement depletion is a fast and inexpensive technique for the isolation of immune cell populations with high purity.
05:35
Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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Cited by 5 •
2016
Here we report protocols to detect endogenous and exogenous centromere-kinetochore proteins in human cells and quantify these protein levels at centromeres-kinetochores by indirect immunofluorescent staining through the use of fixation (paraformaldehyde, acetone, or methanol fixation).
13:46
Immunoprecipitation-Based Techniques: Purification of Endogenous Proteins Using Agarose Beads
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2023
Source: Susannah C. Shissler1, Tonya J. Webb1 1 Department of Microbiology and Immunology, University of Maryland, Baltimore, MD 21201 Immunoprecipitation (IP, also known as a 'pull-down' assay) is a widely used technique that has applications in a variety of fields. First conceived in 1984, it was refined in 1988 (1, 2). The fundamental goal of IP is purification and isolation of a specific protein using an antibody against that protein. The word "immuno" refers to the use of an antibody while...
05:11
Tuning Degradation to Achieve Specific and Efficient Protein Depletion
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Cited by 4 •
2019
Here, we present a protocol to effectively and specifically deplete a protein of interest in the yeast Saccharomyces cerevisiae using the β-est AID system.
12:34
Adenofection: A Method for Studying the Role of Molecular Chaperones in Cellular Morphodynamics by Depletion-Rescue Experiments
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Cited by 7 •
2016
We describe a method for depletion-rescue experiments that preserves cellular integrity and protein homeostasis. Adenofection enables functional analyses of proteins within biological processes that rely on finely tuned actin-based dynamics, such as mitotic cell division and myogenesis, at the single-cell level.
FAQs
RNA interference acts at the transcript level, reducing the messenger RNA available for protein production. Genome editing instead alters the native genetic source so that production of the protein is reduced or removed. These mechanisms affect different stages of gene expression, allowing researchers to select an approach suited to whether they need transcript reduction or a genetically altered cellular state.
An inducible degron directs an already produced protein toward selective degradation when the system is activated. This can reduce the delay associated with waiting for new protein synthesis to decline after transcript targeting. Because depletion is inducible, researchers can examine cellular changes after protein loss and relate those changes to signaling, metabolism, development, or disease-related phenotypes.
Near-native expression limits artifacts that can arise when a protein is produced at artificially high levels. Overexpression may disturb signaling, metabolism, or other cellular processes independently of the protein’s normal function. Depletion under native expression conditions therefore provides a more relevant comparison for assessing how loss of the protein changes cellular behavior.
Untreated or otherwise appropriate control cells provide the reference needed to attribute observed differences to protein depletion rather than to the manipulation itself. Comparing these cells with depleted cells helps researchers connect the reduction or removal of the target protein to specific phenotypes. This comparison is central to functional interpretation in biology.
A typical workflow begins by choosing a reduction strategy that targets the transcript, native gene, or existing protein. Researchers then compare cells subjected to depletion with untreated or control cells under the relevant biological conditions. The resulting cellular phenotypes are examined to determine whether the target protein contributes to signaling, metabolism, development, or disease-related processes.
Changes observed after depletion can provide functional evidence linking a protein to cellular pathways or broader biological processes. Depending on the system, the phenotype may implicate roles in signaling, metabolism, development, or disease-related biology. The strength of the interpretation comes from comparing depleted cells with appropriate controls under comparable conditions.
The approach is useful when researchers need to test protein function without relying on artificial overexpression. In functional genomics, depletion helps connect individual proteins with cellular phenotypes and biological pathways. In disease-oriented research, the same strategy can support validation of potential therapeutic targets by showing whether reducing or removing a protein produces a relevant cellular outcome.