| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
Clostridium botulinum cultures are classified into seven types, types A to G, based on the antigenicity of the neurotoxins produced. Of these seven types, only types C and D produce phospholipase C (lecithinase, PLC) in addition to the neurotoxin. Phospholipase of C. perfringens is known as α-toxin, which is the best characterized of all clostridial phospholipases and is an important agent of gas gangrene. The toxin, which exhibits phospholipase C and sphingomyelinase (SMase) activities, causes hemolysis, necrosis, and death. Here we determined the PLC genes of C. botulinum type C and D (Cbotα and Dbotα) by using inverse PCR and primer walking, and expressed as a GST-fusion protein. We compare the enzymatic and biological activities (egg-yolk activity, hemolysis, and mouse lethality) of the purified protein of C. perfringens α-toxin, Cbotα, and Dbotα.
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