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L2387

Sigma-Aldrich

Lipopolysaccharides from Salmonella typhosa

purified by gel-filtration chromatography

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Synonym(s):
LPS
MDL number:
MFCD00131520
UNSPSC Code:
12352201
NACRES:
NA.25

biological source

bacterial (Salmonella typhosa)

Quality Level

200

form

lyophilized powder

purified by

gel-filtration chromatography

impurities

<1% Protein

color

white to faint yellow

solubility

water: soluble

storage temp.

2-8°C

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General description

This product is extracted from Salmonella typhosa and purified by gel filtration. The source strain is ATCC 10749.

Application

Lipopolysaccharides (LPSs) 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).

Biochem/physiol Actions

Lipopolysaccharides (LPS) are localized in the outer layer of the membrane and are, in noncapsulated strains, exposed on the cell surface. They contribute to the integrity of the outer membrane, and protect the cell against the action of bile salts and lipophilic antibiotics.

Preparation Note

The product is soluble in water (5 mg/ml) or cell culture medium (1 mg/ml) yielding a hazy, faint yellow solution. A more concentrated, though still hazy, solution (20 mg/ml) has been achieved in aqueous saline after vortexing and warming to 70-80 oC. Lipopolysaccharides are molecules that form micelles in every solvent. Hazy solutions are observed in water and phosphate buffered saline. Organic solvents do not give clearer solutions. Methanol yields a turbid suspension with floaters, while water yields a homogeneously hazy solution.

Other Notes

To gain a comprehensive understanding of our extensive range of Lipopolysaccharides for your research, we encourage you to visit our Carbohydrates Category page.

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H300

Hazard Classifications

Acute Tox. 2 Oral

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Malick M Gibani et al.
PLoS neglected tropical diseases, 14(10), e0008783-e0008783 (2020-10-21)
Enteric fever is a systemic infection caused by Salmonella Typhi or Paratyphi A. In many endemic areas, these serovars co-circulate and can cause multiple infection-episodes in childhood. Prior exposure is thought to confer partial, but incomplete, protection against subsequent attacks
Malick M Gibani et al.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 68(8), 1265-1273 (2018-09-27)
Shedding of Salmonella Typhi or Paratyphi in the stool or urine leads to contamination of food or water, which is a prerequisite for transmission of enteric fever. Currently, there are limited data on the effect of vaccination or prior exposure
Thomas C Darton et al.
PLoS neglected tropical diseases, 10(8), e0004926-e0004926 (2016-08-18)
Typhoid persists as a major cause of global morbidity. While several licensed vaccines to prevent typhoid are available, they are of only moderate efficacy and unsuitable for use in children less than two years of age. Development of new efficacious
Deborah L Cross et al.
Frontiers in immunology, 11, 574057-574057 (2021-01-12)
Vi-polysaccharide conjugate vaccines are efficacious against cases of typhoid fever; however, an absolute correlate of protection is not established. In this study, we investigated the leukocyte response to a Vi-tetanus toxoid conjugate vaccine (Vi-TT) in comparison with a plain polysaccharide
Benjamin R Sabari et al.
Molecular cell, 58(2), 203-215 (2015-03-31)
Acetylation of histones at DNA regulatory elements plays a critical role in transcriptional activation. Histones are also modified by other acyl moieties, including crotonyl, yet the mechanisms that govern acetylation versus crotonylation and the functional consequences of this "choice" remain
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Lipopolysaccharides

Lipopolysaccharide (LPS) is a major component of Gram-negative bacteria, important for microbiological research.

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