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H9395

Sigma-Aldrich

α-Hemolysin from Staphylococcus aureus

lyophilized powder, Protein ~60 % by Lowry, ≥10,000 units/mg protein

Synonyme(s) :

α-Toxin

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About This Item

Numéro CAS:
94716-94-6
Numéro MDL:
MFCD00130489
Code UNSPSC :
12352202
Nomenclature NACRES :
NA.56

Source biologique

Staphylococcus aureus

Niveau de qualité

300

Forme

lyophilized powder

Activité spécifique

≥10,000 units/mg protein

Contient

sodium citrate buffer as balance

Composition

Protein, ~60% Lowry

Solubilité

H2O: soluble 0.49-0.51 mg/mL

Numéro d'accès UniProt

Q2G1X0

Température de stockage

2-8°C

Informations sur le gène

Staphylococcus aureus ... SAOUHSC_01121(3920722)

Catégories apparentées

Description générale

α-Hemolysin, a pore-forming cytotoxin is an extracellular protein secreted by most strains of pathogenic Staphylococcus aureus. It is secreted as a water-soluble monomer and is a small β-barrel protein.

Application

α-Hemolysin from Staphylococcus aureus has been used:
  • as a component of electrolyte solution for testing pore formation in lipid bilayer using electrophysiological measurements
  • to test its osteogenesis suppressive effects in bone marrow stromal cells (BMSCs)
  • in the preparation of α-hemolysin molecular imprinted polymer (MIP) for Biacore and surface plasmon resonance

α-Hemolysin was used in a study to test the efflux pump and haemolysin activity of Escherichia coli of dairy origin. It was also used to test its adaptation to benzalkonium chloride and the effect of ciprofloxacin on biofilm formation.

Actions biochimiques/physiologiques

α-Hemolysin is selectively hemolytic and the monomeric form binds to a membrane and specific receptors are not required for binding. Upon binding to biological membranes and/or artificial membranes, self-oligomerization occurs, resulting in ring structures (hexameric aggregates) believed to represent transmembrane pores, which are permeable to ions and small metabolites. It has a marked preference for rabbit red blood cells. α-hemolysin stimulates cellular phospholipases and induces a Ca2+ influx. It leads to membrane disruption of the endothelial barrier and leakage of cytoplasmic components and osmotic lysis of the cells. α-hemolysin is implicated in the pathogenesis of sepsis.

Conditionnement

Package size based on protein content

Définition de l'unité

One hemolytic unit will cause 50% lysis of a 1% suspension of rabbit red blood cells in phosphate buffered saline, pH 7.0, containing 1% bovine serum albumin after 30 min at 37 °C followed by refrigeration for 30 min at 4 °C.

Pictogrammes

Health hazardExclamation mark
GHS08,GHS07

Mention d'avertissement

Warning

Mentions de danger

H315,H319,H371

Classification des risques

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 2

Organes cibles

Lungs,Blood

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

Ankita Pagedar et al.
The Journal of dairy research, 79(4), 383-389 (2012-08-10)
The present study investigates the effect of adaptive resistance to ciprofloxacin (Cip) and benzalkonium chloride (BC) on biofilm formation potential (BFP), efflux pump activity (EPA) and haemolysin activity of Escherichia coli isolates of dairy origin. All the isolates, irrespective of
Gregory J Digby et al.
The Journal of physiology, 586(14), 3325-3335 (2008-05-24)
Signalling by heterotrimeric G proteins is often isoform-specific, meaning certain effectors are regulated exclusively by one family of heterotrimers. For example, in excitable cells inwardly rectifying potassium (GIRK) channels are activated by G betagamma dimers derived specifically from G(i/o) heterotrimers.
L N Silva et al.
Scientific reports, 7(1), 2823-2823 (2017-06-08)
Staphylococcus aureus is an opportunistic pathogen related to a variety of life-threatening infections but for which antimicrobial resistance is liming the treatment options. We report here that myricetin, but not its glycosylated form, can remarkably decrease the production of several
Bryan J Berube et al.
Toxins, 5(6), 1140-1166 (2013-07-31)
Staphylococcus aureus secretes a number of host-injurious toxins, among the most prominent of which is the small β-barrel pore-forming toxin α-hemolysin. Initially named based on its properties as a red blood cell lytic toxin, early studies suggested a far greater
Rakez Kayed et al.
The Journal of biological chemistry, 284(7), 4230-4237 (2008-12-23)
Amyloid oligomers are believed to play causal roles in several types of amyloid-related neurodegenerative diseases. Several different types of amyloid oligomers have been reported that differ in morphology, size, or toxicity, raising the question of the pathological significance and structural
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Contenu apparenté

Lyse et extraction des protéines

Panorama des méthodes de lyse cellulaire et d'extraction protéique, comme la solubilisation par détergents, la lyse par congélation/décongélation, le choc osmotique, la sonication, la lyse cellulaire enzymatique et les techniques de fragmentation mécanique comme l'homogénéisation au Dounce, au Polytron ou au mortier et au pilon.

Lysis & Protein Extraction

Cell lysis and protein extraction methods overview various techniques, from detergent solubilization to mechanical disruption, supporting research needs.

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