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S Tag Peptide Pancreatic RNase A derivtive

Catalog No.A6007
Size Price Stock Qty
5mg
$105.00
In stock
25mg
$473.00
In stock

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Sample solution is provided at 25 µL, 10mM.

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Chemical structure

S Tag Peptide

Biological Activity

Description S Tag Peptide is an oligopeptide derived from pancreatic ribonuclease A used for improving protein solubility.
Targets anti-S-Tag antibody          
IC50            

S Tag Peptide Dilution Calculator

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S Tag Peptide Molarity Calculator

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Chemical Properties

Cas No. SDF Download SDF
Synonyms H-Lys-Glu-Thr-Ala-Ala-Ala-Lys-Phe-Glu-Arg-Gln-His-Met-Asp-Ser-OH
Chemical Name S Tag
Canonical SMILES CC(C(C(=O)NC(C)C(=O)NC(C)C(=O)NC(C)C(=O)NC(CCCCN)C(=O)NC(CC1=CC=CC=C1)C(=O)NC(CCC(=O)O)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCC(=O)N)C(=O)NC(CC2=CN=CN2)C(=O)NC(CCSC)C(=O)NC(CC(=O)O)C(=O)NC(CO)C(=O)O)NC(=O)C(CCC(=O)O)NC(=O)C(CCCCN)N)O
Formula C73H117N23O25S M.Wt 1748.91
Solubility >174.9mg/mL in DMSO or water Storage Desiccate at -20°C
Shipping Condition Evaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.

Background

S Tag is the name of an oligopeptide derived from pancreatic ribonuclease A (RNase A). If RNase A is digested with subtilisin, a single peptide bond is cleaved, but the resulting two products remain weakly bound to each other and the protein, it is called ribonuclease S, remains active although each of the two products alone shows no enzymatic activity. The N-terminus of the original RNase A, also called S-peptide, consists of 20 amino acid residues, of which only the first 15 are required for ribonuclease activity. This 15 amino acids long peptide is called S15 or S-tag.

It is believed that the peptide with its abundance of charged and polar residues could improve solubility of proteins it is attached to. Moreover, the peptide alone is thought not to fold into a distinct structure. On DNA-level the S-tag can be attached to the N- or C-terminus of any protein. After gene expression, such a tagged protein can be detected by commercially available antibodies. [1]

References:
1. R.T. Raines et al., The S-Tag Fusion System for Protein Purification. Methods Enzymol. 326, 362-367 (2000)