Sh3 Domain Purification
Sh3 Domain Purification - Related Videos
02:26
Conservation of Protein Domains Over Different Proteins
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2020
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms. A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
02:01
Purification of Bacteria-Derived Recombinant P Domain Proteins of Human Norovirus
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2025
Source: Leuthold, M. M., et al. Production of Human Norovirus Protruding Domains in E. coli for X-ray Crystallography. J. Vis. Exp. (2016).This video demonstrates the purification of recombinant human norovirus P domain using size exclusion chromatography, highlighting the separation of the target protein from higher and lower molecular weight impurities based on differential pore accessibility. The process is monitored by UV absorbance and confirmed through SDS-PAGE analysis of eluted...
10:08
Purification and Aggregation of the Amyloid Precursor Protein Intracellular Domain
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Cited by 1 •
2012
A method for large-scale purification of the APP intracellular domain (AICD) is described. We also describe methodology to induce in vitro AICD aggregation and visualization by atomic force microscopy. The methods described are useful for biochemical/structural characterization of the AICD and the effects of molecular chaperones on its aggregation.
14:25
Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
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Cited by 5 •
2017
A procedure is presented for the refolding of the dCACHE periplasmic ligand binding domain of Campylobacter jejuni chemoreceptor Tlp3 from inclusion bodies and the purification to yield milligram quantities of protein.
10:46
Production of Human Norovirus Protruding Domains in E. coli for X-ray Crystallography
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Cited by 3 •
2016
Here, we describe a method to express and purify high quality norovirus protruding (P) domains in E. coli for use in X-ray crystallography studies. This method can be applied to other calicivirus P domains, as well as non-structural proteins, i.e., viral protein genome-linked (VPg), protease, and RNA dependent RNA polymerase (RdRp).
FAQs
An affinity tag gives the recombinant SH3 domain a selective handle for binding to a matching resin. When the tagged protein is separated from other host-cell components, the resin preferentially retains the target domain, simplifying its recovery. This capture step provides a practical basis for isolating the domain before further chromatographic refinement.
Affinity capture enriches the tagged SH3 domain, but it may not remove every unwanted cellular component or closely associated protein. Additional chromatographic steps improve the preparation’s purity by separating the target from remaining contaminants. A cleaner sample is particularly important when interpreting binding measurements, structural data, or structure-function experiments.
Purified SH3 domains support direct analysis of recognition between the domain and proline-rich peptide sequences. Because the experiment uses defined components, researchers can measure binding affinity and relate sequence recognition to SH3-domain function. These measurements help clarify how protein-protein interactions contribute to signaling pathways and larger protein assemblies.
The workflow begins with production of a recombinant SH3 domain in host cells. The resulting material is subjected to chromatographic separation, commonly using an affinity tag that binds a specific resin. After the target is enriched, additional purification can improve sample quality, yielding defined material for biochemical assays or structural analysis.
The central materials are a recombinant SH3 domain, a host-cell expression system, an affinity tag, and a resin selected to bind that tag. Chromatographic separation provides the organizational framework for isolating the domain from cellular components. Further chromatography can then refine the preparation when experiments require higher purity or better-defined samples.
Researchers use purified SH3 domains when they need controlled material for measuring peptide-binding affinity, examining recognition of proline-rich sequences, or investigating structure-function relationships. The resulting data can illuminate protein assembly and signaling mechanisms. Purified domains also support structural studies and the development of tools for investigating or modulating protein interactions.