Construction of hybrid endotoxin genes and evaluation of their mosquito-larvicidal activities

การสร้างยีนไฮบริคของยีนสารพิษฆ่าลูกน้ำยุงและการประเมินผลการฆ่าลูกน้ำยุงของยีนที่สร้างขึ้นใหม่

Name: Sasichai Kangsadalampai

MeSH: Bacillus thuringiensis

MeSH: DNA, Recombinant

MeSH: Endotoxins

MeSH: Hybridization

MeSH: Culicidae

MeSH: Larva

Abstract: The gene encoding 130 kDa-mosquito larvicidal protein of Bacillus thuringiensis var israelensis (B.t.i) crystal, previously cloned in Escherichia coli and named pMU388, has been modified to improve the larvicidal activity by (i) fusion of the toxin gene together, (ii) transposition to pET-3b vector at the position which make this gene under control of a strong promoter of T7 DNA phage. In addition, we present herein a construction of recombinant capable of combining expression of the toxin gene of both B.t.i and Bacillus sphaericus which produce toxin more effective to Culex quinquefasciatus than pMU388. The recombinant #278 containing fused 130 kDa endotoxin gene produced the 200 kDa polypeptide and was found to give toxicity to Aedes aegypti larvae comparable to the gene product of recombinant pMU388. The recombinant #119 carrying the endotoxin gene inserted in pET-3b vector exhibited toxicity to A. aegypti larvae at the same level as recombinant pMU388. This result revealed that the T7 promoter of plasmid pET-3b did not improve the larvicidal activity of B.t.i 130 kDa delta-endotoxin. The recombinants habouring hybrid endotoxin gene from B.t.i and B. sphaericus showed toxicity to A. aegypti larvae at the same level as recombinant pMU388 that carry B.t.i endotoxin gene and also toxic to C. quinquefasciatus larvae comparable to recombinant pCC2297-M which habour B. sphaericus toxin gene.

Mahidol University. Mahidol University Library and Knowledge Center

Address: NAKHONPATHOM

Email: liwww@mahidol.ac.th

Name: Sakol Panyim

Role: Thesis Advisors

Name: Prapon Wilairat

Role: Thesis Advisors

Name: Amaret Bhumiratana

Role: Thesis Advisors

Created: 1989

Modified: 2018-03-08

Issued: 2018-03-08

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Biochemistry

Grantor: Mahidol University

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	10792351-eng.pdf	310.76 KB	1	2020-09-29 13:30:16
2	10792351-tha.pdf	305.93 KB
3	10792351.pdf	42.23 MB	2	2020-09-29 13:40:29

ใช้เวลา

0.303302 วินาที