Inhibitory Substance Produced by Aspergillus sp. on the Snake Venom Proteinase - Isolation of Microorganism and Biological Activities of the Inhibitor -

Aspergillus 속 균주가 생성되는 사독 Proteinase에 대한 저해물질 - 균의 분리 및 저해물질의 생물학적 작용상 -

  • Hyun, Nam-Joo (Department of Food Technology, Taegu Technical Junior College) ;
  • Seu, Jung-Hwn (Department of Microbiology, College of Natural Science, Kyungpook National University)
  • Published : 1987.04.01

Abstract

Aspergillus sp. (MK-24) producing a biological active substance that inhibited the venom proteinase activity was isolated from soil. The substance also inhibited the activity of trypsin and coagulation of blood, but did not inhibit papain, $\alpha$-chymotrypsin and pepsin. The substance was partially purified from culture filtrate by precipitaion with acetone, and by chromatography of DEAE-Sepadex A-50 column and Amberlite IRC-50 ion exchange. The inhibitory substance was stable in the wide pH range from 2.0 to 12.0 at 37$^{\circ}C$, but not stable at $65^{\circ}C$ in the alkaline pH. Only 12% of the activity was decreased by the heat treatment at 10$0^{\circ}C$ for two hours. The inhibition on venom proteinase (Agkistrodon bromohoffi brevicaudus) was a mixed type. The inhibitory activity depended on the preincubation time and completely depressed by cupric, zinc and cobalt ions. The inhibition on the venom proteinase was appeared strongly on casein but not on ovalbumin or hemoglobin as a substrate.

Keywords

Venom proteinase inhibitor;biological activity