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SMB00704 Sigma

Lipopolysaccharides from Proteus mirabilis

purified by phenol extraction

Synonym: LPS



form   lyophilized powder
purified by   phenol extraction
storage temp.   2-8°C


General description

Lipopolysaccharides (LPS′s) are characteristic components of the cell wall of Gram-negative bacteria. LPS and its lipid A moiety stimulate cells of the innate immune system by the Toll-like receptor 4 (TLR4), a member of the Toll-like receptor protein family, which recognizes common pathogen-associated molecular-patterns (PAMPs).

Preparation Note

Soluble in water and cell culture medium DMEM (1 mg/mL) yielding a clear to slightly hazy solution.

Biochem/physiol Actions

Proteus mirabilis is a Gram-negative facultative anaerobic rod-shaped bacterium. Bacteria of the genus Proteus of the family Enterobacteriaceae are opportunistic human pathogens responsible for wound and burn infections as well as skin, eye, ear, nose, throat, urinary tract, and gastrointestinal infections and bacteremias. The most common infection involving P. mirabilis occurs when the bacteria, which is a member of the natural intestinal flora, moves to the urethra and urinary bladder causing urinary tract infection.

The outer-membrane lipopolysaccharide is considered an important virulence factor of Proteus. It has been suggested that the immunological response against P. mirabilis LPS might play a role in rheumatoid arthritis. A possible correlation between the abundance of P. mirabilis in the intestine and obesity was suggested recently. The purified LPS from P. mirabilis OXK is used in the Weil-Felix test for the diagnosis of rickettsiosis (scrub typhus) caused by the bacterium Orientia (Rickettsia) tsutsugamushi.

Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Protocols & Articles
Peer-Reviewed Papers


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