Abstract:
본 발명은 배추좀나방, 파밤나방, 옥수수조명나방 등 나비목 해충에 대한 살충활성이 향상된 신규의 바실러스 트린지엔시스 내독소단백질 유전자 및 그 제조방법에 관한 것으로, 해충 저항성 형질전환 작물의 제작을 위하여 다중부위 특정 돌연변이유발(muti site-directed mutagenesis)를 통해 나비목 해충에 살충활성을 가지는 크라이1-유형( cry1 -type) 내독소단백질의 기주범위와 관련된 아미노산 잔기 서열이 치환된 신규 재조합 내독소단백질 유전자 및 그 제조 방법을 제공한다.
Abstract:
The present invention relates to a novel bacillus thuringiensis endotoxic protein gene with improved insecticidal activities against lepidopteran insects and to a method for producing the same. More specifically, the present invention relates to a method for producing a bacillus thuringiensis endotoxic gene with strong insecticidal activities against lepidopteran insects such as Mamestra brassicae, Spodoptera litura, and Spodoptera exigua. The purpose of the present invention is achieved through the steps of: confirming a base sequence and a tertiary structure of a mod-cry1AC gene; producing a PIM-mod-cry1AC vector using the mod-cry1AC gene obtained from the previous step; producing a mutation-inducing primer using the mod-cry1AC as a mold; performing a polymerase chain reaction (PCR) using the mutation-inducing primer obtained from the previous step so as to produce novel BT endotoxic protein gene to be transformed in colon bacilli and confirming mutations; and confirming a base sequence and a tertiary structure of the novel BT endotoxic protein gene obtained from the previous step. Accordingly, in the present invention, agricultural products, which are not damaged by larvae of various lepidopteran insects, can be produced using a microorganism formulation including novel recombinant endotoxic protein gene Mut-N16.