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Key Documents

176908

Sigma-Aldrich

Anthrax Protective Antigen, Bacillus anthracis, Nicked, Recombinant, B. anthracis

Sinonimo/i:

PA 63, PA 63

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About This Item

Codice UNSPSC:
12352202
NACRES:
NA.77

Forma fisica

lyophilized

Livello qualitativo

Produttore/marchio commerciale

Calbiochem®

Condizioni di stoccaggio

OK to freeze

Condizioni di spedizione

ambient

Temperatura di conservazione

2-8°C

Descrizione generale

Recombinant, Bacillus anthracis anthrax protective antigen (nicked) expressed in a specialized strain of B. anthracis. PA63 is the carboxyl-terminal 63-kDa fragment obtained by the proteolytic cleavage of the receptor-bound protective antigen (PA), one of the three proteins that comprise anthrax toxin. Unlike native PA, PA63 oligomerizes to form a ring-shaped heptamer that binds up to three copies of EF and/or LF competitively and with high affinity (Kd ~1 nM). Whereas native PA persists on the cell surface, the heptamer is endocytosed, presumably because oligomerization aggregates anthrax toxin receptor. The endocytosed toxic complexes are trafficked to endosomal compartments where the low pH causes the PA63 heptamer to insert into the membrane and form a water-filled channel.
Recombinant, Bacillus anthracis anthrax protective antigen(nicked) expressed in a special strain of B. anthracis. PA63 is the carboxyl-terminal 63-kDa fragment obtained by the proteolytic cleavage of the receptor-bound protective antigen (PA), one of the three proteins that comprise anthrax toxin. Unlike native PA, PA63 oligomerizes to form a ring-shaped heptamer that binds up to three copies of EF and/or LF competitively and with high affinity (Kd ~1 nM). Whereas native PA persists on the cell surface, the heptamer is endocytosed, presumably because oligomerization aggregates anthrax toxin receptor. The endocytosed toxic complexes are trafficked to endosomal compartments where the low pH causes the PA63 heptamer to insert into the membrane and form a water-filled channel.

Azioni biochim/fisiol

Cell permeable: no
Primary Target
EF and/or LF
Product does not compete with ATP.
Reversible: no

Attenzione

Toxicity: Standard Handling (A)

Stato fisico

Lyophilized from 100 mM NaCL, 10 mM BIS-Tris propane, 1.25% trehalose, pH 8.5.

Ricostituzione

Following reconstitution aliquot and freeze (-20°C or- 70°C) for long term storage or refrigerate (4°C) for short-term (few hours) storage. Avoid rapid freeze-thaw cycles of solutions. Stock solutions are stable for up to 3 months at -20°C or -70°C.
Reconstitute in sterile 50% glycerol or sterile, distilled H₂O to a final concentration of 1 mg/ml. Addition of BSA to a concentration of 1 mg/ml may enhance stability.

Risultati analitici

Single major band at 63 kD by SDS-PAGE

Altre note

Mogridge, J., et al. 2002. Proc. Natl. Acad. Sci. USA99, 7045.
Nassi, S., et al. 2002. Biochemistry41, 1445.
Singh, Y., et al. 1999. Infect. Immun.67, 1853.
Leppla, S.H. 1988. Methods Enzymol.165, 103.

Note legali

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable


Certificati d'analisi (COA)

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