176908

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

• 동의어(들): PA ₆₃, PA ₆₃
• UNSPSC 코드: 12352202
• NACRES: NA.77

속성

• 형태: lyophilized
• Quality Level: 100
• 제조업체/상표: Calbiochem^®
• 저장 조건: OK to freeze
• 배송 상태: ambient
• 저장 온도: 2-8°C

설명

일반 설명

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 (K_d ~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 (K_d ~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.

생화학적/생리학적 작용

Cell permeable: no

Primary Target
EF and/or LF

Product does not compete with ATP.

Reversible: no

경고

Toxicity: Standard Handling (A)

물리적 형태

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

재구성

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.

분석 메모

Single major band at 63 kD by SDS-PAGE

기타 정보

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.

법적 정보

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

안전성 정보

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable