S Tag Peptide

S Tag Peptide is a synthetic peptide sequence derived from the ribonuclease A (RNase A) S protein, widely utilized as an affinity tag in molecular biology and protein biochemistry. Comprising a specific amino acid motif, it enables straightforward detection, purification, and quantification of recombinant proteins. The S Tag Peptide is valued for its minimal interference with protein folding and function, making it a preferred choice in diverse experimental systems. Its compact size and high specificity facilitate versatile applications in protein engineering, interaction studies, and analytical workflows, supporting research across molecular biology, structural biology, and proteomics.

Affinity purification: In recombinant protein research, the S Tag sequence is frequently fused to the N- or C-terminus of target proteins to enable affinity purification. The tag binds with high specificity to S protein or anti-S Tag antibodies immobilized on chromatography matrices, allowing selective isolation of tagged proteins from complex lysates. This approach streamlines downstream processing, enhances yield, and improves sample purity, making it especially useful for the preparation of proteins for functional assays, crystallization, or further biochemical analysis.

Protein detection and quantification: The S Tag system provides a reliable means for sensitive detection and quantification of tagged proteins in various assay formats. Utilizing antibodies or S protein conjugates, researchers can assess expression levels via Western blotting, ELISA, or immunoprecipitation. The robust interaction between the tag and its binding partners supports high signal-to-noise ratios, facilitating accurate monitoring of protein expression, stability, and localization in both prokaryotic and eukaryotic systems.

Protein-protein interaction studies: By incorporating the S Tag into recombinant constructs, scientists can investigate protein-protein interactions using pull-down assays or co-immunoprecipitation techniques. The tag enables selective capture of bait proteins and their binding partners from cell extracts, providing insights into molecular complexes and interaction networks. The specificity and low background associated with the S Tag system enhance the reliability of interaction mapping, supporting the elucidation of signaling pathways and protein function.

Protein folding and solubility analysis: The S Tag Peptide serves as a valuable tool for assessing the folding, solubility, and aggregation state of recombinant proteins. Its minimal structural footprint reduces the likelihood of perturbing native protein conformation, making it suitable for monitoring protein expression in soluble versus insoluble fractions. Researchers can leverage this property to optimize expression conditions, screen for solubility-enhancing partners, or evaluate the impact of mutations on protein stability.

Fusion protein engineering: The S Tag is frequently employed in the design and production of fusion proteins for a variety of experimental purposes. Its compatibility with other affinity tags and reporter domains allows for the creation of multifunctional constructs tailored to specific research objectives. The tag's small size minimizes steric hindrance, preserving the biological activity of fusion partners while offering a modular platform for purification, detection, and downstream functional studies. This versatility makes the S Tag Peptide a valuable component in the development of advanced protein-based tools and reagents for molecular and cellular research.

1. Urinary Metabolites Associated with Blood Pressure on a Low-or High-Sodium Die

2. C-Peptide replacement therapy and sensory nerve function in type 1 diabetic neuropathy

3. Immune-awakening Saccharomyces-inspired nanocarrier for oral target delivery to lymph and tumors

4. Store-operated Ca2+ entry sustains the fertilization Ca2+ signal in pig eggs

5. Investigating Potential Interactions Between Neurohypophyseal Peptides, their Drug Analogs, and Coagulation Factor VIII