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基于Bt毒素的杀虫蛋白理性设计与创新应用策略
徐重新, 金嘉凤, 孙晓明, 沈成, 张霄, 陈澄宇, 刘贤金, 刘媛
中国农业科学, 2024, 57(1): 96-125.   DOI: 10.3864/j.issn.0578-1752.2024.01.008

供试模板
Tested template
改造位点
Modification site
实施效果
Implementation effect
参考文献
Reference
Cry1AaDomain I α4—α5区域153位点氨基酸Y突变为C(Y153C)The amino acid Y at site 153 in Domain I α4-α5 was mutated to C (Y153C)突变体对烟草天蛾的肠道损伤较原Cry1Aa显著提升The intestinal damage of the mutant to M. sexta was significantly higher than that of the original Cry1Aa[48]
Domain II-Loop 2区域氨基酸“RRIILGSGPNNQE”整体突变为人源抗体重链CDR-H3肽段 “GARGDPDFDHSTSYYLDYC” The amino acids “RRIILGSGPNNQE” in Domain II-Loop 2 were mutated to “GARGDPDFDHSTSYYLDYC”, a heavy chain CDR-H3 peptide of human antibody突变体对埃及伊蚊(LC50为9.1 μg·mL-1)的致死毒力较原Cry1Aa(LC50>20 μg·mL-1)提高超过2.2倍;对非靶标家蚕的致死率较原Cry1Aa显著降低The lethal virulence of the mutant against A. aegypti (LC50 was 9.1 μg·mL-1) was more than 2.2-fold higher than that of the original Cry1Aa (LC50>20 μg·mL-1). The lethality rate of the mutant to non-target B. mori was significantly lower than that of original Cry1Aa[54]
Domain II-Loop 2区域371LGSG371氨基酸突变371WGLA374 The amino acids 371LGSG371 in Domain II-Loop 2 were mutated to 371WGLA374突变体对家蚕(LC50为0.752 μg·g-1)的致死毒力较原Cry1Aa (LC50为0.864 μg·g-1)提高15% The lethal virulence of the mutant to B. mori (LC50 was 0.752 μg·g-1) was 15% higher than that of the original Cry1Aa (LC50 was 0.864 μg·g-1)[4]
Domain II-Loop 3区域440AA441氨基酸突变为440PR441 The amino acids 440AA441 in Domain II-Loop 3 were mutated to 440PR441突变体对家蚕(LC50为0.398 μg·g-1)的致死毒力较原Cry1Aa(LC50为0.996 μg·g-1)提高2.5倍The lethal virulence of the mutant to B. mori (LC50 was 0.398 μg·g-1) was 2.5-fold higher than that of the original Cry1Aa (LC50 was 0.996 μg·g-1)[55]
Cry1AbDomain II Loop2区域282位点氨基酸A、283位点氨基酸L和372位点氨基酸N分别突变为G(A282G)、S(L283S)和A(N372A)The amino acids A at 282 site, L at 283 site and N at 372 site in Domain II Loop2 were mutated to G (A282G), S (L283S) and A (N372A), respectively突变体对苹果毒蛾(LC50为8 ng·cm-2)的致死毒力较原Cry1Ab(LC50为290 μg·cm-2)提高36.25倍The lethal virulence of the mutant to Lymantria dispar (LC50 was 8 ng·cm-2) was 36.25-fold higher than that of the original Cry1Ab (LC50 was 290 μg·cm-2)[50]
Domain II Loop2 335RRPFNIGINNQ345突变为褐飞虱肠道结合肽GBPs-P2S(CLMSSQAAC)The amino acids 335RRPFNIGINNQ345 in Domain II Loop2 were mutated to Nilaparvata lugens gut-binding peptide GBPs-P2S (CLMSSQAAC)突变体对褐飞虱(LC50为21.54 μg·mL-1)的致死毒力较原Cry1Ab(LC50为189.83 μg·mL-1)提高9倍The lethal virulence of the mutant to N. lugens (LC50 was 21.54 μg·mL-1) was 9-fold higher than that of the original Cry1Ab (LC50 was 189.83 μg·mL-1)[51]
Domain III β16区域514位点氨基酸N突变为A(N514A)The amino acid N at 514 site in Domain III β16 was mutated to A (N514A)突变体对草地贪夜蛾(LC50为26.4 μg·cm-2)的致死毒力较原Cry1Ab(LC50为468 μg·cm-2)提高18倍The lethal virulence of the mutant to S. frugiperda (LC50 was 26.4 μg·cm-2) was 18-fold higher than that of the original Cry1Ab (LC50 was 468 μg·cm-2)[56]
Domain III β-22区域587位点氨基酸S突变为A(S587A)The amino acid S at 587 site in Domain III β-22 was mutated to A (S587A)突变体对草地贪夜蛾(LC50为44 ng·cm-2)的致死毒力较原Cry1Ab(LC50>5000 ng·cm-2)显著增强The lethal virulence of the mutant to S. frugiperda (LC50 was 44 ng·cm-2) was significantly higher than that of the original Cry1Ab (LC50>5000 ng·cm-2)[57]
Cry1AcDomain III β16—β17连接区域524位点氨基酸T突变为N(T524N)The amino acid T at 524 site in Domain III β16-β17 connection area was mutated to N (T524N)突变体对甜菜夜蛾(LC50为9.6 μg·mL-1)的致死毒力较原Cry1Ac(LC50为14.1 μg·mL-1)提升1.4倍The lethal virulence of the mutant to S. exigua (LC50 was 9.6 μg·mL-1) was 1.4-fold higher than that of the original Cry1Ac (LC50 was 14.1 μg·mL-1)[72]
Domain III β18—β19连接区域544位点氨基酸W突变为F(W544F)The amino acid W at 544 site in Domain III β18-β19 connection area was mutated to F (W544F)突变体抗虫活性保持不变,但对紫外线的稳定性显著增强The insecticidal activity of the mutant remained unchanged, but its stability to UV radiation was significantly enhanced[12]
Domain III β18—β19连接区域546位点氨基酸N突变为A(N546A)The amino acid N at 546 site in Domain III β18-β19 connection area was mutated to A (N546A)突变体对棉铃虫(LC50为1.67 μg·mL-1)的致死毒力较原Cry1Ac(LC50为2.98 μg·mL-1)提高1.78倍The lethal virulence of the mutant to H. armigera (LC50 was 1.67 μg·mL-1) was 1.78-fold higher than that of the original Cry1Ac (LC50 was 2.98 μg·mL-1)[58]
Domain III β20—β21连接区域585位点氨基酸I突变为A(I585A)The amino acid I at 585 site in Domain III β20-β21 connection area was mutated to A (I585A)突变体对棉铃虫(LC50为1.47 μg·mL-1)的致死毒力较原Cry1Ac(LC50为2.78 μg·mL-1)提高1.89倍The lethal virulence of the mutant to H. armigera (LC50 was 1.47 μg·mL-1) was 1.89-fold higher than that of the original Cry1Ac (LC50为2.78 μg·mL-1)[59]
Cry1AiDomain II Loop2(RIILGSGPNNQE)、Loop3 (TMLSQAAGAVYTL)分别突变为Cry1Ah的Loop2(RPFNIGINNQQ)和Loop3(SMFRSGSSSSVSII)The amino acids of Domain II Loop2 (RIILGSGPNNQE) and Loop3 (TMLSQAAGAVYTL) were mutated to Cry1Ah Loop2 (RPFNIGINNQQ) and Loop3 (SMFRSGSSSSVSII), respectively突变体对棉铃虫(LC50为8.6 μg·mL-1)的致死毒力较原Cry1Ai(LC50>500 μg·mL-1)显著提升The lethal virulence of the mutant to H. armigera (LC50 was 8.6 μg·mL-1) was significantly higher than that of the original Cry1Ai (LC50>500 μg·mL-1)[52]
Cry1CaDomain III区域541STGV544突变为541AAAA544 The amino acids 541STGV544 in Domain III were mutated to 541AAAA544突变体对烟草天蛾(LC50为80 ng·cm-2)的致死毒力较原Cry1Ca(LC50为123 ng·cm-2)提高43% The lethal virulence of the mutant to M. sexta (LC50 was 80 ng·cm-2) was 43% higher than that of the original Cry1Ca (LC50 was 123 ng·cm-2)[73]
Cry1FaDomain III β16区域507位点氨基酸N突变为A(N507A)The amino acid N at 507 site in Domain III β16 was mutated to A (N507A)突变体对草地贪夜蛾(LC50为28.7 ng·cm-2)的致死毒力较原Cry1Fa(LC50为171 ng·cm-2)提高5.95倍The lethal virulence of the mutant to S. frugiperda (LC50 was 28.7 ng·cm-2) was 5.95-fold higher than that of the original Cry1Fa (LC50 was 171 ng·cm-2)[56]
Cry2AaDomain I α2—α3区域63、64位点氨基酸K分别突变为F(K63F)和P(K64P)The amino acids K at 63 and 64 sites in Domain I α2-α3 were mutated to F (K63F) and P (K64P), respectively突变体对斜纹夜蛾、小地老虎和棉铃虫(LC50分别为6.09、72.37和51.33 ng·mL-1)的致死毒力较原Cry2Aa(LC50分别为40.09、299.88和251.33 ng·mL-1)提高4.1—6.6倍The lethal virulence of the mutant to Spodoptera litura, Agrotis ypsilon and H. armigera (LC50 was 6.09, 72.37 and 51.33 ng·mL-1, respectively) was 4.1-6.6 folds higher than that of the original Cry2Aa (LC50 was 40.09, 299.88 and 251.33 ng·mL-1, respectively)[43]
Cry2AbDomain I α3—α4区域144位点氨基酸L突变为A(L144A)The amino acid L at 144 site in Domain I α3-α4 was mutated to A (L144A)突变体对小菜蛾(LD50为1.579 μg·cm-2)的致死毒力较原Cry2Ab(LD50为1.801 μg·cm-2)提高1.14倍The lethal virulence of the mutant to P. xylostella (LD50 was 1.579 μg·cm-2) was 1.14- fold higher than that of the original Cry2Ab (LD50 was 1.801 μg·cm-2)[47]
Cry2AhDomain II β4—β5之间Loop2区域354位点氨基酸V突变为SP(V354SP)The amino acid V at Loop2 region 354 site in Domain II β4-β5 was mutated to SP (V354SP)突变体对棉铃虫(EC50为1.63 μg·mL-1)的致死毒力较原Cry2Ah(EC50为8.7 μg·mL-1)提高5.3倍The lethal virulence of the mutant to H. armigera (EC50 was 1.63 μg·mL-1) was 5.3-fold higher than that of the original Cry2Ah (EC50 was 8.7 μg·mL-1)[53]
Cry3AaDomain I α3—α4之间的连接区域153NPVSSRNPHS162突变为153NPAPPF-PHS162 The amino acids 153NPVSSRNPHS162 in Domain I α3-α4 connection area were mutated to 153NPAPPF-PHS162突变体对玉米根虫的致死率(93%)较原Cry3Aa(34%)提高2.74倍The lethality rate of the mutant (93%) to D. virgifera was 2.74-fold higher than that of the original Cry3Aa (34%)[45]
Domain I区域65、70、231位点氨基酸K以及Domain II区域468位点氨基酸K和Domain III区域596位点氨基酸K均突变为A The amino acids K at 65, 70 and 231 sites in Domain I, 468 site in Domain II and 596 site in Domain III were mutated to A突变体对松褐天牛(LC50为12.3 μg·mL-1)的致死毒力较原Cry3Aa(LC50为116.8 μg·mL-1)提高9.5倍The lethal virulence of the mutant to Monochamus alternatus (LC50 was 12.3 μg·mL-1) was 9.5-fold higher than that of the original Cry3Aa (LC50 was 116.8 μg·mL-1)[74]
Domain II Loop1区域345位点氨基酸R、350和351位点氨基酸Y分别突变为A(R345A)、F(Y350F)和F(Y351F)The amino acids R at 345 site, Y at 350 and 351 sites in Domain II Loop1 were mutated to A (R345A), F (Y350F) and F (Y351F), respectively突变体对黄粉虫(LD50为1.0 μg)的致死毒力较原Cry3Aa(LD50为11.4 μg)提高11.4倍The lethal virulence of the mutant to Tenebrio molitor (LD50 was 1.0 μg) was 11.4-fold higher than that of the original Cry3Aa (LD50 was 11.4 μg)[75]
Cry4AaDomain I α2—α3区域67SG68突变为67SFRRG71234NR235突变为234NFRR237 The amino acids 67SG68 and 234NR235 in Domain I α2-α3 were mutated to 67SFRRG71 and 234NFRR237, respectively突变体对豌豆蚜的致死率(51.1%)较原Cry4Aa(17.8%)提高2.87倍The lethality rate of the mutant (51.1%) to A. pisum was 2.87-fold higher than that of the original Cry4Aa (17.8%)[44]
Cry8CaDomain II区域439位点氨基酸Q突变为P(Q439P)、Domain III区域884位点氨基酸E突变为G(E884G)The amino acids Q at 439 site in Domain II and E at 884 site in Domain III were mutated to P (Q439P) and G (E884G), respectively突变体对铜绿鳃金龟(LC50为0.22334×108 CFU/g)的致死毒力较原Cry8Ca(LC50为0.9583×108 CFU/g)提高4.3倍The lethal virulence of the mutant to Anomala corpulenta (LC50 was 0.22334×108 CFU/g) was 4.3-fold higher than that of the original Cry8Ca (LC50 was 0.9583×108 CFU/g)[76]
Cry8KaDomain I α3区域82位点氨基酸R突变为Q(R82Q);Domain II Loop区域260位点氨基酸Y突变为C(Y260C)、321位点氨基酸P突变为A(P321A);Domain III区域508位点氨基酸R突变为G(R508G)、538位点氨基酸K突变为E(K538E)、594位点氨基酸E突变为N(E594N)The amino acids R at 82 site in Domain I α3, Y at 260 and P at 321 sites in Domain II Loop, and R at 508, K at 538 and E at 594 sites in Domain III were mutated to Q (R82Q), C (Y260C), A (P321A), G (R508G), E (K538E) and N (E594N), respectively突变体对棉铃象甲(LC50为2.83 μg·mL-1)的致死毒力较原Cry8Ka(LC50为8.93 μg·mL-1)提高3.15倍The lethal virulence of the mutant to Anthonomus grandis (LC50为2.83 μg·mL-1) was 3.15-fold higher than that of the original Cry8Ka (LC50为8.93 μg·mL-1)[46]
Cry19AaDomain II Loop 1 355SYWT358突变为355YQDLR359,同时切掉Loop 2的414YPWGD418 The amino acids 355SYWT358 in Domain II Loop 1 were mutated to 355YQDLR359, and at the same time the amino acids 414YPWGD418 in Loop 2 were deleted突变体对埃及伊蚊(LC50为3.3 ng·mL-1)的致死毒力较原Cry19Aa(LC50为1.4×105 ng·mL-1)提高42000倍The lethal virulence of the mutant to A. aegypti (LC50 was 3.3 ng·mL-1) was 42000-fold higher than that of the original Cry19Aa (LC50 was 1.4×105 ng·mL-1)[49]
Cry41-related48位点氨基酸G、59位点氨基酸I、364位点氨基酸K、367和377位点氨基酸Q、378位点氨基酸Y、400位点氨基酸S分别突变为Y(G48Y)、A(I59A)、R(K364R)、K(Q367K)、K(Q377K)、K(Y378K)、Y(S400Y)The amino acids G at 48, I at 59, K at 364, Q at 367 and 377, Y at 378 and S at 400 sites were mutated to Y (G48Y), A (I59A), R (K364R), K (Q367K), K (Q377K), K (Y378K) and Y (S400Y), respectively突变体对桃蚜(LC50为19.144 μg·mL-1)的致死毒力较原Cry41-type(LC50为32.7 μg·mL-1)提高1.71倍The lethal virulence of the mutant to Myzus persicae (LC50 was 19.144 μg·mL-1) was 1.71-fold higher than that of the original Cry41-type (LC50 was 32.7 μg·mL-1)[77]
Cry51Aa46位点氨基酸F、54位点氨基酸Y、95位点氨基酸S、147位点氨基酸F、167位点氨基酸S、219位点氨基酸P、239位点氨基酸N、251位点氨基酸V分别突变为S(F46S)、H(Y54H)、A(S95A)、A(F147A)、R(S167R)、R(P219R)、A(N239A)、A(V251A) The amino acids F at 46, Y at 54, S at 95, F at 147, S at 167, P at 219, N at 239 and V at 251 sites were mutated to S (F46S), H (Y54H), A (S95A), A (F147A), R (S167R), R (P219R), A (N239A) and A (V251A), respectively突变体对豆荚草盲蝽(LC50为0.3 μg·mL-1)和美洲牧草盲蝽(LC50为0.85 μg·mL-1)的致死毒力较原Cry51Aa(LC50分别为73和>223 μg·mL-1)提高243和>262倍The lethal virulence of the mutant to Lygus hesperus (LC50 was 0.3 μg·mL-1) and Lygus lineolaris (LC50 was 0.85 μg·mL-1) was 243 and >262 folds higher than that of the original Cry51Aa (LC50 was 73 and >223 μg·mL-1), respectively[78]
Cyt1AaLoop6-αE区域204位点氨基酸E突变为A(E204A)The amino acid E at 204 site in Loop6-αE was mutated to A (E204A)突变体对埃及伊蚊(LC50为103.9 ng·mL-1)的致死毒力较原Cyt1Aa(LC50为952.5 ng·mL-1)提高9.17倍The lethal virulence of the mutant to A. aegypti (LC50 was 103.9 ng·mL-1) was 9.17-fold higher than that of the original Cyt1Aa (LC50 was 952.5 ng·mL-1)[63]
Loop6/7/9同时突变为Cry1Ab Domain II Loop3(FRSGFSNSSVSI)The amino acids of Loop6/7/9 were mutated to Cry1Ab Domain II Loop3 (FRSGFSNSSVSI)突变体对烟草天蛾和小菜蛾的致死率较原Cyt1Aa提高60%—80% The lethality rate of the mutant to M. sexta and P. xylostella was 60%-80% higher than that of the original Cyt1Aa[64]
Cyt2AaLoop4 177SLSAHN181突变为豌豆蚜肠道结合肽GBP3.1(TCSKKYPRSPCM)The amino acids of Loop4 177SLSAHN181 were mutated to A. pisum intestinal binding peptide GBP3.1 (TCSKKYPRSPCM)突变体对豌豆蚜和桃蚜(LC50分别为0.18和11.9 μg·mL-1)的致死毒力较原Cyt2Aa(LC50分别为0.37和>150 μg·mL-1)显著增强The lethal virulence of the mutant to A. pisum and M. persicae (LC50 was 0.18 and 11.9 μg·mL-1) was significantly higher than that of the original Cyt2Aa (LC50 was 0.37 and >150 μg·mL-1)[65]
Vip3AaDomain I和Domain II之间的Loop区域193SS194突变为193RA194、197位点氨基酸K突变为RA(K197RA)The amino acids 193SS194 in Loop area between Domain I and Domain II were mutated to 193RA194, and K at 197 site was mutated to RA (K197RA)突变体对草地贪夜蛾和棉铃虫(LC50分别为32.94和148.2 ng·cm-2)的致死毒力较原Vip3Aa(LC50分别为56.76和270.1 ng·cm-2)显著增强The lethal virulence of the mutant to S. frugiperda and H. armigera (LC50 was 32.94 and 148.2 ng·cm-2) was significantly higher than that of the original Vip3Aa (LC50 was 56.76 and 270.1 ng·cm-2)[79]
Domain IV区域543位点氨基酸S、544位点氨基酸I和Domain V区域627位点氨基酸E分别突变为N(S543N)、L(I544L)和A(E627A)The amino acids S at 543 and I at 544 sites in Domain IV, and E at 627 site in Domain V were mutated to N (S543N), L (I544L) and A (E627A), respectively突变体对草地贪夜蛾(LC50为0.3 μg·g-1)的致死毒力较原Vip3Aa(LC50为2.2 μg·g-1)提高7.3倍The lethal virulence of the mutant to S. frugiperda (LC50 was 0.3 μg·g-1) was 7.3-fold higher than that of the original Vip3Aa (LC50 was 2.2 μg·g-1)[68]
Domain V区域686位点氨基酸S突变为R(S686R)The amino acid S at 686 site in Domain V was mutated to R (S686R)突变体对甜菜夜蛾(LC50为2.05 μg·mL-1)的致死毒力较原Vip3Aa(LC50为18.4 μg·mL-1)提高8.98倍The lethal virulence of the mutant to S. exigua (LC50 was 2.05 μg·mL-1) was 8.98-fold higher than that of the original Vip3Aa (LC50 was18.4 μg·mL-1)[69]
Domain V区域776位点氨基酸N突变为Y(N776Y)The amino acid N at 776 site in Domain V was mutated to Y (N776Y)突变体对甜菜夜蛾(LC50为110 ng·cm-2)的致死毒力较原Vip3Aa(LC50为250 ng·cm-2)提高2.27倍;且热稳定性显著增强The lethal virulence of the mutant to S. exigua (LC50为was 110 ng·cm-2) was 2.27-fold higher than that of the original Vip3Aa (LC50 was 250 ng·cm-2), and the thermal stability was significantly enhanced[70]
Vip3AfDomain II区域250位点氨基酸K突变为A(K250A) The amino acid K at 250 site in Domain II was mutated to A (K250A)突变体对草地贪夜蛾的致死率(91%)较原Vip3Af(72%)提高19% The lethality rate of the mutant (91%) to S. frugiperda was 19% higher than that of the original Vip3Af (72%)[67]
Domain I区域34位点氨基酸M突变为K(M34K)The amino acid M at 34 site in Domain I was mutated to K (M34K)突变体对棉贪夜蛾(LC50为12.6 ng·cm-2)的致死毒力较原Vip3Af(LC50为31 ng·cm-2)提高2.46倍The lethal virulence of the mutant to Spodoptera littoralis (LC50 was 12.6 ng·cm-2) was 2.46-fold higher than that of the original Vip3Af (LC50 was 31 ng·cm-2)[66]
Sip1Aa153位点氨基酸G和248位点氨基酸H同时突变为C(G153C/H248C)The amino acids G at 153 and H at 248 sites were mutated to C (G153C/H248C)突变体对白菜叶甲(LC50为0.614 μg·mL-1)的致死毒力较原Sip1Aa(LC50为1.696 μg·mL-1)提高2.76倍The lethal virulence of the mutant to Colaphellus bowringi (LC50 was 0.614 μg·mL-1) was 2.76-fold higher than that of the original Sip1Aa (LC50 was 1.696 μg·mL-1)[41]
β9—β10之间Loop区域128位点氨基酸K突变为A(K128A)The amino acid K at 128 site in the Loop region between β9 and β10 was mutated to A (K128A)突变体对白菜叶甲(LC50为0.18 μg·mL-1)的致死毒力较原Sip1Aa(LC50为1.683 μg·mL-1)提高近10倍The lethal virulence of the mutant to C. bowringi (LC50 was 0.18 μg·mL-1) was nearly 10-fold higher than that of the original Sip1Aa (LC50 was 1.683 μg·mL-1)[71]
表2 基于Bt毒素的突变体理性设计实例
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