Streptolysin O

Modify Date: 2025-08-25 20:38:14

Streptolysin O structure	Common Name	Streptolysin O
	CAS Number	98072-47-0	Molecular Weight	N/A
	Density	N/A	Boiling Point	N/A
	Molecular Formula	N/A	Melting Point	N/A
	MSDS	USA	Flash Point	N/A

Use of Streptolysin O

Streptolysin O, a group A streptococcal toxin, is a well-characterized oxygen-labile prototype of a cholesterol-binding bacterial exotoxin. Streptolysin O causes both lysis of cells and cardiotoxicity. Streptolysin O is widely used for the controlled permeabilization of cell membranes. Streptolysin O exists in two forms, a reduced active state and an oxidized reversibly inactive state [1][2][3][4].

Name	STREPTOLYSIN O
Synonym	More Synonyms

Description	Streptolysin O, a group A streptococcal toxin, is a well-characterized oxygen-labile prototype of a cholesterol-binding bacterial exotoxin. Streptolysin O causes both lysis of cells and cardiotoxicity. Streptolysin O is widely used for the controlled permeabilization of cell membranes. Streptolysin O exists in two forms, a reduced active state and an oxidized reversibly inactive state [1][2][3][4].
Related Catalog	Research Areas >> Infection
In Vitro	When Streptolysin O is secreted by streptococci, it is in an active state, but it rapidly oxidizes to a reversibly inactive state with the formation of disulfide bonds[2]. Streptolysin O, belongs to the group of thiol-activated toxins, is a secreted virulence factor of GAS that induces apoptosis in neutrophils and macrophages at later time points (~4 h). Streptolysin O induces eukaryotic cell lysis in a cholesterol-dependent manner, is highly upregulated in the GAS M1T1 clone during bloodstream dissemination. Streptolysin O is known to promote Group A Streptococcus (GAS) resistance to phagocytic clearance by neutrophils, a critical first element of host defense against invasive bacterial infection[3].
References	[1]. Sierig G, et al. Cytotoxic effects of streptolysin o and streptolysin s enhance the virulence of poorlyencapsulated group a streptococci. Infect Immun. 2003 Jan;71(1):446-55. [2]. Van Epps DE, et al. Streptolysin O II. Relationship of Sulfyhdryl Groups to Activity. Infect Immun. 1971 May;3(5):648-52. [3]. Uchiyama S, et al. Streptolysin O Rapidly Impairs Neutrophil Oxidative Burst and Antibacterial Responses to Group A Streptococcus. Front Immunol. 2015 Nov 16;6:581. [4]. Yamamoto I, et al. Mutational and comparative analysis of streptolysin O, an oxygen-labile streptococcal hemolysin. Biosci Biotechnol Biochem. 2001 Dec;65(12):2682-9.

Appearance of Characters	lyophilized powder
InChIKey	OUNBUOICPMHVPB-UHFFFAOYSA-N
SMILES	[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y].[Y]
Storage condition	2-8°C
Water Solubility	H2O: soluble1mg/mL

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
RIDADR	UN 2811PIH 6.1 / PGI
WGK Germany	3

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