Gst Fusion Protein
Gst Fusion Protein - Related Videos
11:22
GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins
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Cited by 18 •
2013
In the present protocol, we demonstrate a highly efficient and cost-effective small-scale protein purification method, which allows purification of recombinant proteins by uniquely combining a cleavable GST-tag and a small His-tag.
11:28
Affinity Precipitation of Active Rho-GEFs Using a GST-tagged Mutant Rho Protein (GST-RhoA(G17A)) from Epithelial Cell Lysates
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Cited by 14 •
2012
The method presented here describes an assay to follow activation of RhoA specific GDP/GTP Exchange Factors (GEFs) in cultured cells by making use of a mutant RhoA GST fusion protein that has high affinity for activated GEFs. GEFs are precipitated from cell lysates, detected by Western blotting and quantified by densitometry.
09:27
Generation of Fluorescent Protein Fusions in Candida Species
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Cited by 6 •
2017
PCR-mediated gene modification can be used to generate fluorescent protein fusions in Candida species, which facilitates visualization and quantitation of yeast cells and proteins. Herein, we present a strategy for constructing a fluorescent protein fusion (Eno1-FP) in Candida parapsilosis.
01:24
Tagging and Fusion Proteins
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2023
Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
04:06
Single-Molecule Imaging to Visualize Fusion Protein Condensates Assembly on DNA Curtains
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2025
This video describes a method to visualize the assembly of fusion protein condensates on DNA molecules at specific loci using single-molecule imaging. These condensates are formed due to LCD-LCD and LCD-DBD interactions, which allow for the recruitment of RNA polymerase II and enhanced gene transcription.
FAQs
The key purification step depends on the GST tag’s specific interaction with immobilized glutathione. When a cell extract contacts this material, proteins lacking the matching interaction are separated from the tagged species. This affinity relationship concentrates the fusion protein and reduces the complexity of the sample, making downstream analysis more practical.
A GST tag can support the soluble production of a target protein, which is useful when the untagged protein is difficult to maintain in solution. Improved solubility can make the recombinant product more suitable for purification and later functional studies. The benefit depends on how the fusion behaves in the chosen biological host.
Protease removal separates GST from the target protein after the fusion has been purified. This can be important when the tag might influence the target’s behavior, interaction with other molecules, or enzymatic activity. Because removal can often be performed after purification, the tag serves first as a production and separation aid, then can be excluded from subsequent analyses.
The workflow begins by engineering a recombinant gene that links GST to the target-protein sequence. A host such as Escherichia coli then expresses the fusion gene, producing the tagged protein within the cells. Researchers subsequently use the tag’s glutathione-binding property to isolate the product from other cellular material before studying it.
Purification provides a concentrated preparation of the target protein that is more suitable for in vitro work than an unprocessed cellular mixture. The resulting material can support protein-interaction analysis or enzymatic-activity studies. Researchers may evaluate the target either as a GST-linked product or, when appropriate, after protease-mediated tag removal.
This approach is useful when a study requires both practical protein recovery and functional characterization. It connects molecular cloning, recombinant expression, affinity purification, and in vitro analysis within one workflow. Applications include improving protein solubility, isolating a target from host-cell components, examining molecular interactions, and assessing enzymatic activity.