动物医学进展
動物醫學進展
동물의학진전
PROGRESS IN VETERINARY MEDICINE
2014年
3期
11-14
,共4页
窦小龙%任晓冰%魏婕%苗书魁%冉多良%马文戈
竇小龍%任曉冰%魏婕%苗書魁%冉多良%馬文戈
두소룡%임효빙%위첩%묘서괴%염다량%마문과
Asia 1型口蹄疫病毒%病毒样颗粒%融合蛋白%枯草芽胞杆菌
Asia 1型口蹄疫病毒%病毒樣顆粒%融閤蛋白%枯草芽胞桿菌
Asia 1형구제역병독%병독양과립%융합단백%고초아포간균
FMDV type Asia 1%virus-like particle%fusion protein%Bacillus subtilis
为制备Asia 1型口蹄疫病毒(FMDV)双层结构病毒样颗粒,选择牛病毒性腹泻病毒(BVDV)流行株BVDV JZ05-1核心蛋白p14的第169~270位氨基酸和 FMDV Asia 1/JS/CHA/05结构蛋白 VP1的第1~211位氨基酸,两者之间设计柔性肽连接,人工合成 p14-柔性肽-VP1融合蛋白编码序列,全基因长990 bp。合成基因与枯草芽胞杆菌表达载体 p7257-P43连接,构建成表达质粒 p7257-P43-P14-VP1。转化枯草芽胞杆菌 WB800,经筛选、鉴定,获得表达 p14-VP1融合蛋白的枯草芽胞杆菌。该重组表达菌在含有40μg/mL氯霉素的 LB中培养后,菌体超声破碎可检测到目的蛋白。Western blot 结果显示,该蛋白能特异性识别Asia 1型FMDV抗体,具有良好的反应原性。电镜观察显示,融合蛋白组装为直径约50 nm大小的病毒样颗粒(VLP)。
為製備Asia 1型口蹄疫病毒(FMDV)雙層結構病毒樣顆粒,選擇牛病毒性腹瀉病毒(BVDV)流行株BVDV JZ05-1覈心蛋白p14的第169~270位氨基痠和 FMDV Asia 1/JS/CHA/05結構蛋白 VP1的第1~211位氨基痠,兩者之間設計柔性肽連接,人工閤成 p14-柔性肽-VP1融閤蛋白編碼序列,全基因長990 bp。閤成基因與枯草芽胞桿菌錶達載體 p7257-P43連接,構建成錶達質粒 p7257-P43-P14-VP1。轉化枯草芽胞桿菌 WB800,經篩選、鑒定,穫得錶達 p14-VP1融閤蛋白的枯草芽胞桿菌。該重組錶達菌在含有40μg/mL氯黴素的 LB中培養後,菌體超聲破碎可檢測到目的蛋白。Western blot 結果顯示,該蛋白能特異性識彆Asia 1型FMDV抗體,具有良好的反應原性。電鏡觀察顯示,融閤蛋白組裝為直徑約50 nm大小的病毒樣顆粒(VLP)。
위제비Asia 1형구제역병독(FMDV)쌍층결구병독양과립,선택우병독성복사병독(BVDV)류행주BVDV JZ05-1핵심단백p14적제169~270위안기산화 FMDV Asia 1/JS/CHA/05결구단백 VP1적제1~211위안기산,량자지간설계유성태련접,인공합성 p14-유성태-VP1융합단백편마서렬,전기인장990 bp。합성기인여고초아포간균표체재체 p7257-P43련접,구건성표체질립 p7257-P43-P14-VP1。전화고초아포간균 WB800,경사선、감정,획득표체 p14-VP1융합단백적고초아포간균。해중조표체균재함유40μg/mL록매소적 LB중배양후,균체초성파쇄가검측도목적단백。Western blot 결과현시,해단백능특이성식별Asia 1형FMDV항체,구유량호적반응원성。전경관찰현시,융합단백조장위직경약50 nm대소적병독양과립(VLP)。
In order to prepare the double-layer structure virus-like particles of foot-and-mouth disease virus (FMDV)type Asia 1,the 169-270 amino acids of bovine viral diarrhea virus(BVDV)JZ05-1 strain,its core protein P14,and the 1-211 amino acids of FMDV Asia 1/JS/CHA/05,its structural protein VP1 ,were se-lected out,respectively.Between the two peptides,a flexible motif sequence was inserted into as a linker. The P14-flexible motif-VP1 coding sequence was synthesized and inserted into Bacillus subtilis expression vector p7257-P43 to build up the shuttle plasmid p7257-P43-P14-VP1,and its positive clones were screened out and confirmed by sequence analysis.The shuttle plasmid was transformed into Bacillus subti-lis WB800 cells,and SDS-PAGE analysis showed that expression product consists in the WB800 cells in LB broth with 40μg/mL chloromycetin (Cm),and the fusion protein P14+VP1 could specifically react with the bovine positive sera against FMDV type Asia 1 in Western blot test.By electron microscopy observa-tion,the fusion protein can produce VLPs,which diameter is 50 nanometer aproximately.It provided a new way to explore new VLP vaccine.