STREPTOLYSIN O Chemical Properties

storage temp. 

2-8°C

solubility 

H2O: soluble1mg/mL

form 

lyophilized powder

color 

white

Water Solubility 

H2O: soluble 1mg/mL

Specific Activity

25,000-50,000U/vial

Safety Information

RIDADR 

UN 2811PIH 6.1 / PGI

WGK Germany 

3

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2
very toxic hazardous materials

Hazard Classifications

Acute Tox. 2 Dermal
Acute Tox. 2 Inhalation
Acute Tox. 2 Oral
Aquatic Chronic 2
Eye Dam. 1
Skin Irrit. 2

MSDS

• Language:English Provider:SigmaAldrich

STREPTOLYSIN O Usage And Synthesis

Uses

Permeabilizes membranes to permit cellular uptake of large or charged molecules.

Uses

Used to create holes (reversible pores) in cholesterol-enriched plasma membranes of eukaryotic cells allowing selective permeabilization with molecules such as proteins (up to 100 kDa) and siRNAs.

General Description

Streptolysin O (SLO) is an immunogenic, oxygen-labile toxin, hemolytic exotoxin which is reversibly activated by dithiothreitol. ^[1] It is released into the extracellular medium along with other toxins, including streptolysin S, during the growth of most strains of group A and many strains of groups C and G Streptococci. ^[1,2] SLO and Streptolysin S differ from each other in that SLO is immunogenic and oxygen-labile while Streptolysin S is oxygen-stable, nonimmunogenic and only active when associated with a carrier protein.^[3] The hemolytic activity of SLO is mediated by formation of multimeric nanopores in cholesterol containing lipid membranes.

SLO may be used for cell permeabilization or hemolysis. The susceptibility of hemolysis by SLO varies significantly for erythrocytes from different animal species.^[1] Permeabilization of cells using SLO has been performed on multiple cell types and for various applications. For instance it has been used to introduce antisense oligonucleotides into cultured eukaryotic cells;^[3] to investigate the effect of guanine nucleotide analogues on phosphatidylinositol metabolism and protein kinase C (PKC) activation in live human T lymphocytes;^[4] to monitor cholesterol oxidation within a membrane lipid bilayer; ^[5] and to label proteins inside living cells using external fluorophores.^[6]

Biochem/physiol Actions

This product is produced by recombinant expression in Escherichia coli and contains the complete native protein sequence of SLO (Uniport ID: P0DF96 aa 34-571) without any added purification tags and has calculated molecular weight of 60,144 Dalton. The material is lyophilized from a solution containing 20 mM Sodium Hepes pH 7.5, 150 mM Sodium Chloride and 2 mM EDTA.

Description

Recombinant Streptococcus Pyogenes Streptolysin-O produced in E.coli is a single, non-glycosylated, polypeptide chain containing 538 amino acids and having a molecular mass of 60.1kDa.
The Streptolysin-O is purified by proprietary chromatographic techniques.

Source

Escherichia Coli

Background

Streptolysin-O is a sulfhydryl-activated toxin which causes cytolysis by forming pores in cholesterol containing host membranes. After binding to target membranes, the Streptolysin-O protein undergoes a major conformation change, leading to its insertion in the host membrane and creation of an oligomeric pore complex. Cholesterol may be needed for binding to host membranes, membrane insertion and pore formation. Streptolysin-O can be reversibly inactivated by oxidation.

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