CN106834247A - 一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 - Google Patents
一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 Download PDFInfo
- Publication number
- CN106834247A CN106834247A CN201710166713.9A CN201710166713A CN106834247A CN 106834247 A CN106834247 A CN 106834247A CN 201710166713 A CN201710166713 A CN 201710166713A CN 106834247 A CN106834247 A CN 106834247A
- Authority
- CN
- China
- Prior art keywords
- cuzn
- arg
- gly
- supernatant
- pcold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 title claims abstract description 60
- 108090000765 processed proteins & peptides Proteins 0.000 title claims abstract description 36
- 230000035515 penetration Effects 0.000 title claims abstract description 24
- 210000000170 cell membrane Anatomy 0.000 title claims abstract description 22
- 102000004196 processed proteins & peptides Human genes 0.000 title claims abstract description 21
- 230000009977 dual effect Effects 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 102000019197 Superoxide Dismutase Human genes 0.000 claims abstract description 41
- 108010012715 Superoxide dismutase Proteins 0.000 claims abstract description 41
- 102000006587 Glutathione peroxidase Human genes 0.000 claims abstract description 40
- 108700016172 Glutathione peroxidases Proteins 0.000 claims abstract description 40
- 230000003197 catalytic effect Effects 0.000 claims abstract description 14
- 150000001413 amino acids Chemical group 0.000 claims abstract description 10
- 108091006106 transcriptional activators Proteins 0.000 claims abstract description 8
- 239000013612 plasmid Substances 0.000 claims description 37
- 108090000623 proteins and genes Proteins 0.000 claims description 35
- 230000029087 digestion Effects 0.000 claims description 31
- 238000005119 centrifugation Methods 0.000 claims description 28
- 102000004169 proteins and genes Human genes 0.000 claims description 26
- 230000014509 gene expression Effects 0.000 claims description 24
- 235000018102 proteins Nutrition 0.000 claims description 24
- 239000006228 supernatant Substances 0.000 claims description 23
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 20
- 210000004027 cell Anatomy 0.000 claims description 19
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 claims description 17
- 239000007853 buffer solution Substances 0.000 claims description 15
- 239000002609 medium Substances 0.000 claims description 15
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000108 ultra-filtration Methods 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 238000000246 agarose gel electrophoresis Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 108091008146 restriction endonucleases Proteins 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 108020004414 DNA Proteins 0.000 claims description 9
- 241000588724 Escherichia coli Species 0.000 claims description 9
- 229930027917 kanamycin Natural products 0.000 claims description 9
- 229960000318 kanamycin Drugs 0.000 claims description 9
- SBUJHOSQTJFQJX-NOAMYHISSA-N kanamycin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CN)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](N)[C@H](O)[C@@H](CO)O2)O)[C@H](N)C[C@@H]1N SBUJHOSQTJFQJX-NOAMYHISSA-N 0.000 claims description 9
- 229930182823 kanamycin A Natural products 0.000 claims description 9
- 239000011780 sodium chloride Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 229960000723 ampicillin Drugs 0.000 claims description 8
- AVKUERGKIZMTKX-NJBDSQKTSA-N ampicillin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@H]3SC([C@@H](N3C2=O)C(O)=O)(C)C)=CC=CC=C1 AVKUERGKIZMTKX-NJBDSQKTSA-N 0.000 claims description 8
- 235000018417 cysteine Nutrition 0.000 claims description 8
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 claims description 8
- 238000002525 ultrasonication Methods 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000001963 growth medium Substances 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- 102000012410 DNA Ligases Human genes 0.000 claims description 6
- 108010061982 DNA Ligases Proteins 0.000 claims description 6
- NYHBQMYGNKIUIF-UUOKFMHZSA-N Guanosine Chemical compound C1=NC=2C(=O)NC(N)=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O NYHBQMYGNKIUIF-UUOKFMHZSA-N 0.000 claims description 6
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 claims description 6
- IQFYYKKMVGJFEH-XLPZGREQSA-N Thymidine Chemical compound O=C1NC(=O)C(C)=CN1[C@@H]1O[C@H](CO)[C@@H](O)C1 IQFYYKKMVGJFEH-XLPZGREQSA-N 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 235000011187 glycerol Nutrition 0.000 claims description 6
- 238000011534 incubation Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- YBYRMVIVWMBXKQ-UHFFFAOYSA-N phenylmethanesulfonyl fluoride Chemical compound FS(=O)(=O)CC1=CC=CC=C1 YBYRMVIVWMBXKQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- JULROCUWKLNBSN-UHFFFAOYSA-N selenocystine Chemical compound OC(=O)C(N)C[Se][Se]CC(N)C(O)=O JULROCUWKLNBSN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 230000023555 blood coagulation Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- -1 cysteine hydrochlorides Chemical class 0.000 claims description 5
- 102100027186 Extracellular superoxide dismutase [Cu-Zn] Human genes 0.000 claims description 4
- 108010014173 Factor X Proteins 0.000 claims description 4
- 102000009123 Fibrin Human genes 0.000 claims description 4
- 108010073385 Fibrin Proteins 0.000 claims description 4
- BWGVNKXGVNDBDI-UHFFFAOYSA-N Fibrin monomer Chemical compound CNC(=O)CNC(=O)CN BWGVNKXGVNDBDI-UHFFFAOYSA-N 0.000 claims description 4
- 101000836222 Homo sapiens Extracellular superoxide dismutase [Cu-Zn] Proteins 0.000 claims description 4
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 claims description 4
- 235000001014 amino acid Nutrition 0.000 claims description 4
- 229940024606 amino acid Drugs 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 4
- 229950003499 fibrin Drugs 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000002415 sodium dodecyl sulfate polyacrylamide gel electrophoresis Methods 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 4
- 239000011534 wash buffer Substances 0.000 claims description 4
- RAVVEEJGALCVIN-AGVBWZICSA-N (2s)-2-[[(2s)-2-[[(2s)-2-[[(2s)-5-amino-2-[[(2s)-2-[[(2s)-2-[[(2s)-6-amino-2-[[(2s)-6-amino-2-[[(2s)-2-[[2-[[(2s)-2-amino-3-(4-hydroxyphenyl)propanoyl]amino]acetyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]hexanoyl]amino]hexanoyl]amino]-5-(diamino Chemical compound NC(N)=NCCC[C@@H](C(O)=O)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCN=C(N)N)NC(=O)CNC(=O)[C@@H](N)CC1=CC=C(O)C=C1 RAVVEEJGALCVIN-AGVBWZICSA-N 0.000 claims description 3
- BFSVOASYOCHEOV-UHFFFAOYSA-N 2-diethylaminoethanol Chemical compound CCN(CC)CCO BFSVOASYOCHEOV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004475 Arginine Substances 0.000 claims description 3
- DCXYFEDJOCDNAF-UHFFFAOYSA-N Asparagine Natural products OC(=O)C(N)CC(N)=O DCXYFEDJOCDNAF-UHFFFAOYSA-N 0.000 claims description 3
- DWRXFEITVBNRMK-UHFFFAOYSA-N Beta-D-1-Arabinofuranosylthymine Natural products O=C1NC(=O)C(C)=CN1C1C(O)C(O)C(CO)O1 DWRXFEITVBNRMK-UHFFFAOYSA-N 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 claims description 3
- MIKUYHXYGGJMLM-GIMIYPNGSA-N Crotonoside Natural products C1=NC2=C(N)NC(=O)N=C2N1[C@H]1O[C@@H](CO)[C@H](O)[C@@H]1O MIKUYHXYGGJMLM-GIMIYPNGSA-N 0.000 claims description 3
- NYHBQMYGNKIUIF-UHFFFAOYSA-N D-guanosine Natural products C1=2NC(N)=NC(=O)C=2N=CN1C1OC(CO)C(O)C1O NYHBQMYGNKIUIF-UHFFFAOYSA-N 0.000 claims description 3
- 108010005054 Deoxyribonuclease BamHI Proteins 0.000 claims description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 3
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 3
- 108700000788 Human immunodeficiency virus 1 tat peptide (47-57) Proteins 0.000 claims description 3
- 229910021577 Iron(II) chloride Inorganic materials 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical class CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 3
- 239000007836 KH2PO4 Substances 0.000 claims description 3
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 claims description 3
- ODKSFYDXXFIFQN-BYPYZUCNSA-P L-argininium(2+) Chemical compound NC(=[NH2+])NCCC[C@H]([NH3+])C(O)=O ODKSFYDXXFIFQN-BYPYZUCNSA-P 0.000 claims description 3
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 claims description 3
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 3
- HNDVDQJCIGZPNO-YFKPBYRVSA-N L-histidine Chemical compound OC(=O)[C@@H](N)CC1=CN=CN1 HNDVDQJCIGZPNO-YFKPBYRVSA-N 0.000 claims description 3
- AGPKZVBTJJNPAG-WHFBIAKZSA-N L-isoleucine Chemical compound CC[C@H](C)[C@H](N)C(O)=O AGPKZVBTJJNPAG-WHFBIAKZSA-N 0.000 claims description 3
- ROHFNLRQFUQHCH-YFKPBYRVSA-N L-leucine Chemical compound CC(C)C[C@H](N)C(O)=O ROHFNLRQFUQHCH-YFKPBYRVSA-N 0.000 claims description 3
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 claims description 3
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 claims description 3
- QIVBCDIJIAJPQS-VIFPVBQESA-N L-tryptophane Chemical compound C1=CC=C2C(C[C@H](N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-VIFPVBQESA-N 0.000 claims description 3
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 claims description 3
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 claims description 3
- ROHFNLRQFUQHCH-UHFFFAOYSA-N Leucine Natural products CC(C)CC(N)C(O)=O ROHFNLRQFUQHCH-UHFFFAOYSA-N 0.000 claims description 3
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004472 Lysine Substances 0.000 claims description 3
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 3
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 3
- 241001597008 Nomeidae Species 0.000 claims description 3
- 108010033276 Peptide Fragments Proteins 0.000 claims description 3
- 102000007079 Peptide Fragments Human genes 0.000 claims description 3
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 claims description 3
- 229930006000 Sucrose Natural products 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
- 108010021188 Superoxide Dismutase-1 Proteins 0.000 claims description 3
- 102000008221 Superoxide Dismutase-1 Human genes 0.000 claims description 3
- QIVBCDIJIAJPQS-UHFFFAOYSA-N Tryptophan Natural products C1=CC=C2C(CC(N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-UHFFFAOYSA-N 0.000 claims description 3
- KZSNJWFQEVHDMF-UHFFFAOYSA-N Valine Natural products CC(C)C(N)C(O)=O KZSNJWFQEVHDMF-UHFFFAOYSA-N 0.000 claims description 3
- 235000004279 alanine Nutrition 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 3
- 238000005571 anion exchange chromatography Methods 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 claims description 3
- 235000009697 arginine Nutrition 0.000 claims description 3
- 235000009582 asparagine Nutrition 0.000 claims description 3
- 229960001230 asparagine Drugs 0.000 claims description 3
- IQFYYKKMVGJFEH-UHFFFAOYSA-N beta-L-thymidine Natural products O=C1NC(=O)C(C)=CN1C1OC(CO)C(O)C1 IQFYYKKMVGJFEH-UHFFFAOYSA-N 0.000 claims description 3
- JQXXHWHPUNPDRT-BQVAUQFYSA-N chembl1523493 Chemical compound O([C@](C1=O)(C)O\C=C/[C@@H]([C@H]([C@@H](OC(C)=O)[C@H](C)[C@H](O)[C@H](C)[C@@H](O)[C@@H](C)/C=C\C=C(C)/C(=O)NC=2C(O)=C3C(O)=C4C)C)OC)C4=C1C3=C(O)C=2C=NN1CCN(C)CC1 JQXXHWHPUNPDRT-BQVAUQFYSA-N 0.000 claims description 3
- 229960005091 chloramphenicol Drugs 0.000 claims description 3
- WIIZWVCIJKGZOK-RKDXNWHRSA-N chloramphenicol Chemical compound ClC(Cl)C(=O)N[C@H](CO)[C@H](O)C1=CC=C([N+]([O-])=O)C=C1 WIIZWVCIJKGZOK-RKDXNWHRSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 claims description 3
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 3
- 229910000396 dipotassium phosphate Inorganic materials 0.000 claims description 3
- 229940042399 direct acting antivirals protease inhibitors Drugs 0.000 claims description 3
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 3
- 229910000397 disodium phosphate Inorganic materials 0.000 claims description 3
- 239000003480 eluent Substances 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 235000013922 glutamic acid Nutrition 0.000 claims description 3
- 239000004220 glutamic acid Substances 0.000 claims description 3
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 claims description 3
- 235000004554 glutamine Nutrition 0.000 claims description 3
- 229940029575 guanosine Drugs 0.000 claims description 3
- HNDVDQJCIGZPNO-UHFFFAOYSA-N histidine Natural products OC(=O)C(N)CC1=CN=CN1 HNDVDQJCIGZPNO-UHFFFAOYSA-N 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- AGPKZVBTJJNPAG-UHFFFAOYSA-N isoleucine Natural products CCC(C)C(N)C(O)=O AGPKZVBTJJNPAG-UHFFFAOYSA-N 0.000 claims description 3
- 229960000310 isoleucine Drugs 0.000 claims description 3
- BPHPUYQFMNQIOC-NXRLNHOXSA-N isopropyl beta-D-thiogalactopyranoside Chemical compound CC(C)S[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O BPHPUYQFMNQIOC-NXRLNHOXSA-N 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000011565 manganese chloride Substances 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 229930182817 methionine Natural products 0.000 claims description 3
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 3
- 235000001968 nicotinic acid Nutrition 0.000 claims description 3
- 229960003512 nicotinic acid Drugs 0.000 claims description 3
- 239000011664 nicotinic acid Substances 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 235000015097 nutrients Nutrition 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 239000000137 peptide hydrolase inhibitor Substances 0.000 claims description 3
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 claims description 3
- 230000007026 protein scission Effects 0.000 claims description 3
- ZENDWEPAVHORFD-UHFFFAOYSA-N pyrimidine;urea Chemical compound NC(N)=O.C1=CN=CN=C1 ZENDWEPAVHORFD-UHFFFAOYSA-N 0.000 claims description 3
- 229960001225 rifampicin Drugs 0.000 claims description 3
- 101150029855 selB gene Proteins 0.000 claims description 3
- ZKZBPNGNEQAJSX-UHFFFAOYSA-N selenocysteine Natural products [SeH]CC(N)C(O)=O ZKZBPNGNEQAJSX-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000005720 sucrose Substances 0.000 claims description 3
- 235000019157 thiamine Nutrition 0.000 claims description 3
- 229940104230 thymidine Drugs 0.000 claims description 3
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 claims description 3
- 239000004474 valine Substances 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- 239000011686 zinc sulphate Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000003115 biocidal effect Effects 0.000 claims description 2
- 230000009514 concussion Effects 0.000 claims description 2
- 239000012149 elution buffer Substances 0.000 claims description 2
- 244000144992 flock Species 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims description 2
- DWNBOPVKNPVNQG-LURJTMIESA-N (2s)-4-hydroxy-2-(propylamino)butanoic acid Chemical compound CCCN[C@H](C(O)=O)CCO DWNBOPVKNPVNQG-LURJTMIESA-N 0.000 claims 1
- 244000003416 Asparagus officinalis Species 0.000 claims 1
- 235000005340 Asparagus officinalis Nutrition 0.000 claims 1
- ONIBWKKTOPOVIA-BYPYZUCNSA-N L-Proline Chemical compound OC(=O)[C@@H]1CCCN1 ONIBWKKTOPOVIA-BYPYZUCNSA-N 0.000 claims 1
- 101710163270 Nuclease Proteins 0.000 claims 1
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Natural products OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 claims 1
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 238000009630 liquid culture Methods 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 claims 1
- 229960003495 thiamine Drugs 0.000 claims 1
- 239000011721 thiamine Substances 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- 102000004190 Enzymes Human genes 0.000 abstract description 11
- 108090000790 Enzymes Proteins 0.000 abstract description 11
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 230000003278 mimic effect Effects 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 150000003254 radicals Chemical class 0.000 abstract 1
- 230000003834 intracellular effect Effects 0.000 description 8
- 230000003078 antioxidant effect Effects 0.000 description 6
- 230000002255 enzymatic effect Effects 0.000 description 6
- 230000014616 translation Effects 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 5
- 239000011669 selenium Substances 0.000 description 5
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 description 4
- 235000006708 antioxidants Nutrition 0.000 description 4
- MHMNJMPURVTYEJ-UHFFFAOYSA-N fluorescein-5-isothiocyanate Chemical compound O1C(=O)C2=CC(N=C=S)=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 MHMNJMPURVTYEJ-UHFFFAOYSA-N 0.000 description 4
- RWSXRVCMGQZWBV-WDSKDSINSA-N glutathione Chemical compound OC(=O)[C@@H](N)CCC(=O)N[C@@H](CS)C(=O)NCC(O)=O RWSXRVCMGQZWBV-WDSKDSINSA-N 0.000 description 4
- 229910052711 selenium Inorganic materials 0.000 description 4
- 102000020313 Cell-Penetrating Peptides Human genes 0.000 description 3
- 108010051109 Cell-Penetrating Peptides Proteins 0.000 description 3
- 238000003776 cleavage reaction Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 150000001455 metallic ions Chemical class 0.000 description 3
- 230000007017 scission Effects 0.000 description 3
- 241000165940 Houjia Species 0.000 description 2
- 241000725303 Human immunodeficiency virus Species 0.000 description 2
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 2
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 description 2
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 description 2
- 239000004473 Threonine Substances 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 125000000539 amino acid group Chemical group 0.000 description 2
- 230000001588 bifunctional effect Effects 0.000 description 2
- 229960002685 biotin Drugs 0.000 description 2
- 235000020958 biotin Nutrition 0.000 description 2
- 239000011616 biotin Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000015177 dried meat Nutrition 0.000 description 2
- 229960003180 glutathione Drugs 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002953 phosphate buffered saline Substances 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000003544 thiamines Chemical class 0.000 description 2
- 238000013518 transcription Methods 0.000 description 2
- 230000035897 transcription Effects 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- OALHHIHQOFIMEF-UHFFFAOYSA-N 3',6'-dihydroxy-2',4',5',7'-tetraiodo-3h-spiro[2-benzofuran-1,9'-xanthene]-3-one Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 OALHHIHQOFIMEF-UHFFFAOYSA-N 0.000 description 1
- FWBHETKCLVMNFS-UHFFFAOYSA-N 4',6-Diamino-2-phenylindol Chemical compound C1=CC(C(=N)N)=CC=C1C1=CC2=CC=C(C(N)=N)C=C2N1 FWBHETKCLVMNFS-UHFFFAOYSA-N 0.000 description 1
- QCVGEOXPDFCNHA-UHFFFAOYSA-N 5,5-dimethyl-2,4-dioxo-1,3-oxazolidine-3-carboxamide Chemical compound CC1(C)OC(=O)N(C(N)=O)C1=O QCVGEOXPDFCNHA-UHFFFAOYSA-N 0.000 description 1
- 102000005869 Activating Transcription Factors Human genes 0.000 description 1
- 108010005254 Activating Transcription Factors Proteins 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 108700028146 Genetic Enhancer Elements Proteins 0.000 description 1
- 108010024636 Glutathione Proteins 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 102000003992 Peroxidases Human genes 0.000 description 1
- 239000012980 RPMI-1640 medium Substances 0.000 description 1
- 229920005654 Sephadex Polymers 0.000 description 1
- 239000012507 Sephadex™ Substances 0.000 description 1
- 108091023040 Transcription factor Proteins 0.000 description 1
- 102000040945 Transcription factor Human genes 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- LOKCTEFSRHRXRJ-UHFFFAOYSA-I dipotassium trisodium dihydrogen phosphate hydrogen phosphate dichloride Chemical compound P(=O)(O)(O)[O-].[K+].P(=O)(O)([O-])[O-].[Na+].[Na+].[Cl-].[K+].[Cl-].[Na+] LOKCTEFSRHRXRJ-UHFFFAOYSA-I 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000014103 egg white Nutrition 0.000 description 1
- 210000000969 egg white Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013604 expression vector Substances 0.000 description 1
- GNBHRKFJIUUOQI-UHFFFAOYSA-N fluorescein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 GNBHRKFJIUUOQI-UHFFFAOYSA-N 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 108020004999 messenger RNA Proteins 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 108040007629 peroxidase activity proteins Proteins 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 238000002264 polyacrylamide gel electrophoresis Methods 0.000 description 1
- 239000012474 protein marker Substances 0.000 description 1
- 239000003642 reactive oxygen metabolite Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0089—Oxidoreductases (1.) acting on superoxide as acceptor (1.15)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/70—Vectors or expression systems specially adapted for E. coli
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0065—Oxidoreductases (1.) acting on hydrogen peroxide as acceptor (1.11)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y111/00—Oxidoreductases acting on a peroxide as acceptor (1.11)
- C12Y111/01—Peroxidases (1.11.1)
- C12Y111/01009—Glutathione peroxidase (1.11.1.9)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y115/00—Oxidoreductases acting on superoxide as acceptor (1.15)
- C12Y115/01—Oxidoreductases acting on superoxide as acceptor (1.15) with NAD or NADP as acceptor (1.15.1)
- C12Y115/01001—Superoxide dismutase (1.15.1.1)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2800/00—Nucleic acids vectors
- C12N2800/10—Plasmid DNA
- C12N2800/101—Plasmid DNA for bacteria
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Genetics & Genomics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Zoology (AREA)
- General Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Peptides Or Proteins (AREA)
Abstract
本发明属于人工模拟酶领域,提供了一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,氨基酸序列为YGRKKRRQRRRHQHQFGDLSQGAESTGPHYNPLAVPHPQHPGDWGNFAVRD GSLWPFLRHNVYGRPRAUVVHAGED,其特点是,结构中除了含有使细胞膜具有穿透功能的转录活化因子(TAT)序列外,还含有与超氧化物歧化酶(SOD)催化活性中心和谷胱甘肽过氧化物酶(GPx)的催化三联体结构,因此,兼具SOD和GPx协同抗氧化能力,在因自由基紊乱诱发的疾病的药物应用中具有极大的潜力。并提供其科学合理,简单实用的制备方法。
Description
技术领域
本发明涉及人工模拟酶领域,是一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,具体地说,是一种通过基因重组技术制备的具有超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPx)双活性的含硒金属76肽化合物。
背景技术
机体内抗氧化系统的平衡和人类重大疾病的发生与发展息息相关,且机体内氧化还原平衡的维持需要依靠诸多抗氧化酶间的协同作用,仅对单一功能酶的研究很难深入探索这个复杂体系的作用机制,而进行构建具有多种抗氧化活性的模拟酶,有利于对抗氧化多酶体系中各种抗氧化酶的协同作用进行深入研究。超氧化物歧化酶(superoxidedismutase,SOD)和谷胱甘肽过氧化物酶(glutathione peroxidase,GPx)作为生物体天然抗氧化酶系的重要成员,大量研究表明两者的相互协同作用对清除和人类多种疾病相关的高浓度的ROS(reactive oxygen species,ROS)具有重要作用。因此,对SOD和GPx协同抗氧化效应的模拟化合物的研究至关重要。本申请人所在博士课题组曾经以具有晶体结构的SOD3为模板,保留了其活性必须的氨基酸序列,引入了SOD活性中心的Cu2+和稳定活性基团的Zn2+,同时插入了一段具有GPx底物GSH特异性结合位点的15肽,又通过结构模拟,在特定部位引入了除GPx活性残基Sec以外的对稳定活性部位起到至关重要的氨基酸残基Gln和Trp组成催化三联体,并利用Cys营养缺陷型表达系统,获得一种具有精巧的双酶活性中心结构域的铜锌含硒65肽即Se-CuZn-65P。相对大分子量模拟物,65P作为短肽提高了穿透细胞的效率,但效果依然不够理想。基于此,申请人在Se-CuZn-65P的氨基端连接上人免疫缺陷病毒(human immunodeficiency virus,HIV)反式转录激活因子(trans-activator oftranscription,TAT)的蛋白穿膜结构域的氨基酸序列,即细胞穿膜肽(cell-penetratingpeptide,CPP),使其具有穿透生物膜的能力,命名为Se-CuZn-76P,借助计算机模拟功能建立Se-CuZn-76P的三维结构模型,并与Se-CuZn-65P进行结构比对,分析其活性部位,预测其活性变化。然后在单一蛋白生产(single protein production,SPP)系统中进行半胱氨酸缺陷表达(cysteine auxotrophic expression),酶学特征及穿膜能力鉴定表明,Se-CuZn-76是一种具有双酶活性,位点清晰,结构稳定,催化机理明确且具有穿膜作用和抗氧化协同效应的小分子76肽,其对阐明酶的催化机理以及相互间协同作用有重要意义,而且还有广阔的药用前景。
发明内容
本发明的目的之一是,提供一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,通过引入系列催化氨基酸群和蛋白穿膜结构域的氨基酸序列,建立具有细胞膜穿透效应并兼具SOD和GPx催化活性的新型双功能模拟酶,其把SOD活性中心结构域和GPx活性中心结构域有机整合在一起,使它们能够在各自发挥活性的基础上又能相互协同作用,细胞穿膜肽使其具有穿透生物膜的能力,赋予其广阔的药用前景。本发明的另一目的是,提供一种科学合理,简单实用的兼具细胞膜穿透效应和双抗氧化物酶活性的76肽的制备方法。
实现本发明目的之一采用的技术方案是:一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,结构中含有使细胞膜具有穿透功能的转录活化因子(Trans-activatingtranscriptional activator,TAT)序列,其特征是,还含有与超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPx)相似的结构,其氨基酸一级序列为:Tyr-Gly-Arg-Lys-Lys-Arg-Arg-Gln-Arg-Arg-Arg-His-Gln-His-Gln-Phe-Gly-Asp-Leu-Ser-Gln-Gly-Ala-Glu-Ser-Thr-Gly-Pro-His-Tyr-Asn-Pro-Leu-Ala-Val-Pro-His-Pro-Gln-His-Pro-Gly-Asp-Trp-Gly-Asn-Phe-Ala-Val-Arg-Asp-Gly-Ser-Leu-Trp-Pro-Phe-Leu-Arg-His-Asn-Val-Tyr-Gly-Arg-Pro-Arg-Ala-Sec-Val-Val-His-Ala-Gly-Glu-Asp。
实现本发明目的之二采用的技术方案是:一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽的制备方法,其特征是,它包括以下步骤:
1)Se-CuZn-76P分子模型的建立与分析
以Se-CuZn-65P氨基酸序列为基础,连接上TAT序列(YGRKKRRQRRR),利用BLAST数据库和Homology模块进行同源序列比对并建立Se-CuZn-76P的三维结构模型,预测其活性变化;
BLAST搜索表明,天然SOD1(PDB entry 1HL5,1AZV),SOD3(PDB entry 2JLP)蛋白结构与Se-CuZn-76P有较高的同源性,依据其空间结构建立Se-CuZn-76P三维模型,优化后获得稳定结构,其具有发挥GPx活性的催化三联体(catalytic triad)结构和发挥SOD活性的金属离子配位(metal ion-coordinated)结构;
2)pColdⅠ(sp-4)-76P重组质粒的构建
参照OMEGAPlasmid Mini Kit I质粒提取试剂盒说明书:
将带有质粒的E.coli接种于5mL LB/抗生素培养液中,37℃摇床培养16h;
分次取5.0mL的菌液,室温下10000×g离心1min收集细菌,倒弃培养基;
加入250μl SolutionⅠ/RNaseA混合液,旋窝震荡使细胞完全悬浮;
加入250μl SolutionⅡ,轻轻颠倒混匀6次;
加入350μl SolutionⅢ,温和颠倒数次至形成白色絮状沉淀;
室温下,≥10000×g离心10min;
转移上清液至套有2mL收集管的HiBind DNA结合柱中,室温下,10000×g离心1min,倒去收集管中的滤液;
把柱子重新装回收集管,加入500μl HB Buffer,按上述条件离心,弃去滤液;
把柱子重新装回收集管,加入700μl DNA Wash Buffer按上述条件离心,弃去滤液。注意:浓缩的DNA Wash Buffer在使用之前必需按标签的提示用无水乙醇稀释,重复一次;
弃去滤液,把柱子重新装回收集管,10000×g离心空柱2min以甩干柱子基质;
把柱子装在干净的1.5mL离心管上,加入50μl Elution Buffer到柱子基质中,静置2min,10000×g离心1min洗脱出DNA。
对pET28a-76P和pColdⅠ(sp-4)pPelB质粒进行提取,并采用NdeⅠ和XbaⅠ限制性核酸内切酶对这两个质粒分别双酶切,再用T4DNA连接酶进行连接,双酶切和连接体系如下:
双酶切体系20μL如下:
37℃温育4h,1.5%琼脂糖凝胶电泳鉴定酶切结果并回收酶切片段;
连接体系10μL如下:
双酶切后的76P基因 4.5μL
双酶切后的pColdⅠ(sp-4)载体 1.5μL
H2O 2.5μL
45℃温育5min,冷却至室温,使酶切的目的基因和载体进行粘端退火连接,然后加入10×连接缓冲液1μL,T4DNA连接酶0.5μL,16℃连接16h;
重组质粒经CaCl2法转化入E.coli DH5α感受态菌株中,在含有100μg/mL Amp的卢-贝(Luria-Bertani,LB)固体培养基中筛选后,挑取单克隆在含有100μg/mL Amp的LB液体培养基中扩增培养,提取pColdⅠ(sp-4)-76P质粒,再用1%琼脂糖凝胶电泳进行酶切鉴定;
pColdⅠ(sp-4)-76P质粒为4587bp,由76P氨基端被转录增强元件(translationenhancing element,TEE)、6×组氨酸标签(6×His-Tag)和凝血酶切位点(FactorⅩasite)所表达肽段保护,使其不能发挥穿膜作用而在胞浆内高效表达,由限制性内切酶NdeⅠ和XbaⅠ单、双酶切后1%琼脂糖凝胶电泳鉴定结果可知pColdⅠ(sp-4)-76P质粒构建成功;
3)Se-CuZn-76P的表达和蛋白切割
将pColdⅠ(sp-4)-76P质粒和pMzaF质粒共转化入E.coli BL21(DE3)selB:cysE51感受态菌株中,建立成SPP表达系统,然后采用半胱氨酸缺陷表达法表达和纯化。从转化平板上挑取阳性单克隆接种20mL LB,含100μg/mL Ampicillin,50μg/mL Kanamycin培养基中,37℃振荡培养过夜,将过夜的种子液接种于500mL M9expression medium 1,含100μg/mL Ampicillin,100μg/mL Kanamycin,50μg/mL Cys培养基中,37℃振荡培养,当菌体的OD600达到1.0时,加入诱导剂IPTG使其终浓度达到1mM,37℃诱导10min,再加入Chloramphenicol终浓度为34μg/mL,37℃振荡培养5min后,6000rpm离心10min,弃上清液,菌体用与培养基等体积的0.9%NaCl重悬,6000rpm离心10min,弃上清液,重复洗涤一次,6000rpm离心15min,再次收集菌体,重悬于500mL M9expression medium 2,含100μg/mLAmpicillin,100μg/mL Kanamycin培养基中,同时加入利福平至终浓度为400mg/L,37℃振荡培养5h。离心收集菌体,于50mM,Tris-HCl(pH7.5)缓冲液中反复洗涤两次,重悬于4倍体积的50mM,Tris-HCl,pH7.5溶液中,加入蛋白酶抑制剂PMSF,溶于100μg/mL异丙醇,冰浴下超声破碎菌体,15000rpm离心30min,收集上清液;
M9expression medium 1:6g/L Na2HPO4;3g/L KH2PO4;0.5g/L NaCl;1g/L NH4Cl;400μM H3BO4;30μM CoCl2;10μM CuSO4;80μM MnCl2;10μM ZnSO4;10μM FeCl3;18种常见氨基酸,无Cys,各100μg/mL;1%甘油;0.4%葡萄糖;2mM MgSO4或50μg/mL半胱氨酸盐酸盐;硫胺素(VB1)5μg/mL;
M9expression medium 2:10g/L K2HPO4;1g/L NH4Cl;10mg/L CaCl2;3.6mg/LFeCl2;429mg/L MgAc;2g/L NaAc;丙氨酸、谷氨酸、谷氨酰胺、精氨酸、甘氨酸各400μg/mL;天门冬氨酸、天门冬酰胺、甲硫氨酸、组氨酸各250μg/mL;异亮氨酸、亮氨酸、赖氨酸、脯氨酸、苏氨酸、缬氨酸、酪氨酸各100μg/mL;色氨酸50μg/mL;丝氨酸1600μg/mL;0.5%甘油;0.2%蔗糖;胞嘧啶、鸟苷、脲嘧啶各125μg/mL,胸腺嘧啶50μg/mL;胺素(VB1)50μg/mL;烟酸50μg/mL;生物素100ng/mL;硒代胱氨酸200mg/L;
经Cys缺陷型表达后,把菌液6000rpm离心收集,弃上清,沉淀重悬于25mM,Tris-HCl,pH8.0缓冲液中,清洗3次后,超声破碎,留上清,用醋酸调pH值为5.2~5.4。加入终浓度为0.1mM的CuSO4室温放置1h,然后加入终浓度为0.1mM的ZnSO4室温放置30min,用25mMTris-HCl缓冲液再次调整pH值为8.0,超滤浓缩后,蛋白上清经DEAE阴离子交换柱层析,用10倍柱体积的0~100mM NaCl洗脱,目的蛋白出现在20mM NaCl的洗脱液中,收集洗脱峰,用10mM PBS透析后,分别用截留分子量5KD和10KD的Millipore超滤离心管超滤,浓缩,用Tricine-SDS-PAGE鉴定目的小肽Se-CuZn-65P;
在表达0,12,24,48,72,96,120h时6000rpm离心10min收集沉淀;用50mM Tris-HCl,pH 8.0缓冲液中反复洗涤两次,重悬于4倍体积的50mM Tris-HCl,pH 8.0溶液中,冰浴下超声破碎菌体,15000rpm离心30min后收集上清液,用0.45mm滤膜过滤,考马斯亮蓝G-250方法测定表达蛋白浓度,用2%(w/w)的凝血酶对表达蛋白进行酶切,反应条件23℃,24h,用截留分子为3kDa的Milliproe超滤离心管收集目的肽,冻干备用,获得76肽。
本发明的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,以Se-CuZn-65为基础经过计算机模拟设计引入蛋白穿膜结构域的氨基酸序列,建立具有细胞膜穿透效应并兼具SOD和GPx催化活性的新型双功能模拟酶,并通过实验验证,获得具有双酶活性和穿透生物膜能力的76肽,具有广阔的药用前景。
本发明的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法的进一步优点体现在:
1.保留原65肽中与天然SOD相似的三维结构和天然GPx相似的催化三联体结构,因此,同样兼具SOD和GPx的活性,其中GPx活力为109U/mg protein,SOD活力为1218U/mgprotein,两种酶可以协同参与抗氧化效应,药物应用前景广阔;
2.在原有65肽功能基因基础上,引入携带抗氧化76肽穿透细胞膜功能的转录活化因子TAT穿膜肽基因,使其具有穿透细胞膜的功能,可进入细胞发挥其生物学效应;
3.采用单一蛋白生产(SPP)系统进行富集表达,该系统包括的MazF载体和冷休克表达载体pColdI。MazF表达的MazF蛋白,发挥对mRNA的ACA序列的剪切作用,从而抑制杂蛋白的合成,而不影响设计合成的不含ACA序列的目的蛋白表达,共转的携带目的基因的pColdI载体含有翻译增强元件(translational enhancer element,TEE)、6×His标签、Xa因子切割位点和多种限制性核酸内切酶切割位点,然后利用组氨酸标签纯化目的蛋白,简化了纯化步骤;
4.已被FITC成功标记,采用激光共聚焦显微镜在放大100倍状态下观察发现Se-CuZn-76P可以在TAT序列的协助下可穿透细胞膜而进入细胞。同时测定穿膜过程中细胞内GPx和SOD变化也发现,随着Se-CuZn-76P对L02细胞作用的时间延长,细胞内GPx和SOD活性增加,在第8h时间点上细胞内GPx和SOD活性分别为23.49U/mg protein和83.05U/mgprotein,为L02细胞正常水平的1.65和4.12倍,这也可从侧面证明Se-CuZn-76P穿过了细胞膜。
5.其制备方法科学合理,简单实用。
附图说明
图1为Se-CuZn-76P的空间结构;
图2为Se-CuZn-76P发挥GPx活性的催化三联体结构;
图3为Se-CuZn-76P发挥SOD活性的金属离子配位结构;
图4为pColdⅠ(sp-4)-76P质粒构建的物理图谱;
图5为pColdⅠ(sp-4)-76P质粒构建的琼脂糖凝胶电泳鉴定图,
Lane1:DNA Marker;Lane2:pColdⅠ(sp-4)-76P;Lane3:pColdⅠ(sp-4)-76P+NdeⅠ;Lane4:pColdⅠ(sp-4)-76P+XbaⅠ;Lane5:pColdⅠ(sp-4)-76P+NdeⅠ+XbaⅠ);
图6为Se-CuZn-76P在SPP系统中表达与凝血酶切割的Tricine-SDS-PAGE鉴定图,
Lane1:Protein Marker;Lane2-8:表达不同时间(0h,12h,24h,48h,72h,96h,120h)的可溶性蛋白;Lane9:凝血酶切后纯化的Se-CuZn-76P;
图7为FITC-Se-CuZn-76P穿透L02细胞膜的示意图;
图8为在不同时间点上L02细胞内GPx和SOD活力示意图。
本发明的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,结构中含有使细胞膜具有穿透功能的转录活化因子(Trans-activating transcriptional activator,TAT)序列,其特征是,还含有与超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPx)相似的结构,其氨基酸一级序列为:Tyr-Gly-Arg-Lys-Lys-Arg-Arg-Gln-Arg-Arg-Arg-His-Gln-His-Gln-Phe-Gly-Asp-Leu-Ser-Gln-Gly-Ala-Glu-Ser-Thr-Gly-Pro-His-Tyr-Asn-Pro-Leu-Ala-Val-Pro-His-Pro-Gln-His-Pro-Gly-Asp-Trp-Gly-Asn-Phe-Ala-Val-Arg-Asp-Gly-Ser-Leu-Trp-Pro-Phe-Leu-Arg-His-Asn-Val-Tyr-Gly-Arg-Pro-Arg-Ala-Sec-Val-Val-His-Ala-Gly-Glu-Asp。
本发明的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽的制备方法,包括以下步骤:
1)Se-CuZn-76P分子模型的建立与分析
以Se-CuZn-65P氨基酸序列为基础,连接上TAT序列(YGRKKRRQRRR),利用BLAST数据库和Homology模块进行同源序列比对并建立Se-CuZn-76P的三维结构模型,预测其活性变化;
BLAST搜索表明,天然SOD1(PDB entry 1HL5,1AZV),SOD3(PDB entry 2JLP)蛋白结构与Se-CuZn-76P有较高的同源性,依据其空间结构建立Se-CuZn-76P三维模型,优化后获得稳定结构(图1),其具有发挥GPx活性的催化三联体(catalytic triad)结构(图2)和发挥SOD活性的金属离子配位(metal ion-coordinated)结构(图3);
2)pColdⅠ(sp-4)-76P重组质粒的构建
参照OMEGAPlasmid Mini Kit I质粒提取试剂盒说明书,对pET28a-76P和pColdⅠ(sp-4)pPelB质粒进行提取,并采用NdeⅠ和XbaⅠ限制性核酸内切酶对这两个质粒分别双酶切,再用T4DNA连接酶进行连接,双酶切和连接体系如下:
双酶切体系20μL如下:
37℃温育4h,1.5%琼脂糖凝胶电泳鉴定酶切结果并回收酶切片段;
连接体系10μL如下:
双酶切后的76P基因 4.5μL
双酶切后的pColdⅠ(sp-4)载体 1.5μL
H2O 2.5μL
45℃温育5min,冷却至室温,使酶切的目的基因和载体进行粘端退火连接,然后加入10×连接缓冲液1μL,T4DNA连接酶0.5μL,16℃连接16h;
重组质粒经CaCl2法转化入E.coli DH5α感受态菌株中,在含有100μg/mL Amp的卢-贝(Luria-Bertani,LB)固体培养基中筛选后,挑取单克隆在含有100μg/mL Amp的LB液体培养基中扩增培养,提取pColdⅠ(sp-4)-76P质粒,再用1%琼脂糖凝胶电泳进行酶切鉴定;
pColdⅠ(sp-4)-76P质粒为4587bp,由其物理图谱(图4)可知表达的76P氨基端被转录增强元件(translation enhancing element,TEE)、6×组氨酸标签(6×His-Tag)和凝血酶切位点(Factor Ⅹasite)所表达肽段保护,使其不能发挥穿膜作用而在胞浆内高效表达。由限制性内切酶NdeⅠ和XbaⅠ单、双酶切后1%琼脂糖凝胶电泳鉴定(图5)结果可知pColdⅠ(sp-4)-76P质粒构建成功;
3)Se-CuZn-76P的表达和蛋白切割
将pColdⅠ(sp-4)-76P质粒和pMzaF质粒共转化入E.coli BL21(DE3)selB:cysE51感受态菌株中,建立成SPP表达系统,然后采用半胱氨酸缺陷表达法表达和纯化。从转化平板上挑取阳性单克隆接种20mL LB,含 100μg/mL Ampicillin,50μg/mL Kanamycin培养基中,37℃振荡培养过夜,将过夜的种子液接种于500mL M9 expression medium 1,含100μg/mL Ampicillin,100μg/mL Kanamycin,50μg/mL Cys培养基中,37℃振荡培养,当菌体的OD600达到1.0时,加入诱导剂IPTG使其终浓度达到1mM,37℃诱导10min,再加入Chloramphenicol终浓度为34μg/mL,37℃振荡培养5min后,6000rpm离心10min,弃上清液,菌体用与培养基等体积的0.9%NaCl重悬,6000rpm离心10min,弃上清液,重复洗涤一次,6000rpm离心15min,再次收集菌体,重悬于500mL M9 expression medium 2,含100μg/mLAmpicillin,100μg/mL Kanamycin培养基中,同时加入利福平至终浓度为400mg/L,37℃振荡培养5h。离心收集菌体,于50mM,Tris-HCl(pH7.5)缓冲液中反复洗涤两次,重悬于4倍体积的50mM,Tris-HCl,pH7.5溶液中,加入蛋白酶抑制剂PMSF,溶于100μg/mL异丙醇,冰浴下超声破碎菌体,15000rpm离心30min,收集上清液;
M9expression medium 1:6g/L Na2HPO4;3g/L KH2PO4;0.5g/L NaCl;1g/L NH4Cl;400μM H3BO4;30μM CoCl2;10μM CuSO4;80μM MnCl2;10μM ZnSO4;10μM FeCl3;18种常见氨基酸,无Cys,各100μg/mL;1%甘油;0.4%葡萄糖;2mM MgSO4或50μg/mL半胱氨酸盐酸盐;硫胺素(VB1)5μg/mL;
M9expression medium 2:10g/L K2HPO4;1g/L NH4Cl;10mg/L CaCl2;3.6mg/LFeCl2;429mg/L MgAc;2g/L NaAc;丙氨酸、谷氨酸、谷氨酰胺、精氨酸、甘氨酸各400μg/mL;天门冬氨酸、天门冬酰胺、甲硫氨酸、组氨酸各250μg/mL;异亮氨酸、亮氨酸、赖氨酸、脯氨酸、苏氨酸、缬氨酸、酪氨酸各100μg/mL;色氨酸50μg/mL;丝氨酸1600μg/mL;0.5%甘油;0.2%蔗糖;胞嘧啶、鸟苷、脲嘧啶各125μg/mL,胸腺嘧啶50μg/mL;胺素(VB1)50μg/mL;烟酸50μg/mL;生物素100ng/mL;硒代胱氨酸200mg/L;
经Cys缺陷型表达后,把菌液6000rpm离心收集,弃上清,沉淀重悬于25mM,Tris-HCl,pH8.0缓冲液中,清洗3次后,超声破碎,留上清,用醋酸调pH值为5.2~5.4。加入终浓度为0.1mM的CuSO4室温放置1h,然后加入终浓度为0.1mM的ZnSO4室温放置30min,用25mMTris-HCl缓冲液再次调整pH值为8.0,超滤浓缩后,蛋白上清经DEAE阴离子交换柱层析,用10倍柱体积的0~100mM NaCl洗脱,目的蛋白出现在20mM NaCl的洗脱液中,收集洗脱峰,用10mM PBS透析后,分别用截留分子量5KD和10KD的Millipore超滤离心管超滤,浓缩,用Tricine-SDS-PAGE鉴定目的肽;
在表达0,12,24,48,72,96,120h时6000rpm离心10min收集沉淀;用50mM Tris-HCl,pH 8.0缓冲液中反复洗涤两次,重悬于4倍体积的50mM Tris-HCl,pH 8.0溶液中,冰浴下超声破碎菌体,15000rpm离心30min后收集上清液,用0.45mm滤膜过滤,考马斯亮蓝G-250方法测定表达蛋白浓度,用2%(w/w)的凝血酶对表达蛋白进行酶切,反应条件23℃,24h,用截留分子为3kDa的Milliproe超滤离心管收集目的肽,冻干备用,获得76肽。
pColdⅠ(sp-4)-76P质粒在含有SPP系统的E.coli BL21cysE51表达,Tricine-SDS-PAGE实验结果(图6)初步证明的结果发现在表达的第2天即可表达较纯的可溶性蛋白,理论分子量为10.8kDa,说明以Se-CuZn-76P为主体的可溶性蛋白可以在SPP系统成功表达,表达的可溶性蛋白经凝血酶FactorⅩa切割和超滤纯化后获得暴漏出穿膜肽的Se-CuZn-76P,理论分子量为9.3kDa;
4)Se-CuZn-76P的酶活力和元素含量测定
利用试剂盒测定Se-CuZn-76P的GPx和SOD活力,采用原子吸收分光光度法测定Cu2+和Zn2+的含量,采用氢化物原子荧光光谱法测定硒含量。
经检测Se-CuZn-76P的GPx活力为109U/mg protein,SOD活力为1218U/mgprotein,每分子Se-CuZn-76P中含Se、Cu、Zn原子各1个,这些指标均与Se-CuZn-65P相当,但与天然酶相比,Se-CuZn-76P的GPx活力和SOD活力依然比较低,见表1。
表1 Se-CuZn-76P的SOD活力、GPx活力和Se、Cu、Zn元素含量
5)Se-CuZn-76P穿膜实验
采用Kawamura法将FITC荧光素标记于Se-CuZn-76P的氨基端,生成FITC-Se-CuZn-76P,经Sephadex G-25凝胶层析除去未结合的荧光素。制备的FITC-Se-CuZn-76P加入0.01%叠氮化钠后冻干保存。标记后的鉴定:用紫外分光光度计测定FITC-Se-CuZn-76P在495nm和280nm处的吸光度值(absorbance,A),A495/A280比值在0.3~1.0范围内表示FITC成功标记在蛋白质上。将肝L02细胞接种于6孔板中(5×103细胞/孔),用含10%FBS的RPMI-1640培养液在37℃,5%CO2环境中培养,待细胞贴壁后,加入0.2g/L的FITC-Se-CuZn-76P,继续培养1、2、4、8h。分别在各个时间点上收集细胞,破碎细胞后利用试剂盒测定细胞内GPx和SOD活力。在第8h时间点上,弃去培养液,加入10mg/L DAPI和25μmol/L DiI两种染液,在37℃下孵育10min,然后用0.02mol/L pH7.4磷酸盐缓冲液(phosphate buffered saline,PBS)冲洗5遍,加入2%多聚甲醛固定15min,激光共聚焦显微镜下观察细胞染色。
测定FITC-Se-CuZn-76P的A495/A280比值为0.43,说明Se-CuZn-76P已被FITC成功标记。采用激光共聚焦显微镜在放大100倍状态下观察FITC-Se-CuZn-76P进入细胞的情况(图7)发现Se-CuZn-76P可以在TAT序列的协助下可穿透细胞膜而进入细胞。同时测定穿膜过程中细胞内GPx和SOD变化(图5)也发现,随着Se-CuZn-76P对L02细胞作用的时间延长,细胞内GPx和SOD活性增加,在第8h时间点上细胞内GPx和SOD活性分别为23.49U/mg protein和83.05U/mg protein,为L02细胞正常水平的1.65和4.12倍,这也可从侧面证明Se-CuZn-76P穿过了细胞膜。
6.统计学方法
应用SPSS13.0统计软件进行统计学分析,各项指标检测数据以平均值±标准差(±SD)表示。图中结果可以看出Se-CuZn-76P兼具GPx和SOD双酶活性(图8)。
结论:本发明将SOD和GPx催化活性中心和蛋白穿膜结构域的氨基酸序列结合,以原有工作为基础,构建了新型的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,实验也证明,76肽不但具有较高的SOD和GPx双酶活性,同时具有穿透生物膜的能力,Se-CuZn-76P的成功获得,不仅为构建抗氧化协同作用的模拟酶领域提供了一个新策略,也将对阐明酶的催化机制,探讨蛋白质结构与功能的关系有重要科学意义,并具有重大的药物应用前景。
Claims (2)
1.一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,结构中含有使细胞膜具有穿透功能的转录活化因子(Trans-activating transcriptional activator,TAT)序列,其特征是,还含有与超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPx)相似的结构,其氨基酸一级序列为:Tyr-Gly-Arg-Lys-Lys-Arg-Arg-Gln-Arg-Arg-Arg-His-Gln-His-Gln-Phe-Gly-Asp-Leu-Ser-Gln-Gly-Ala-Glu-Ser-Thr-Gly-Pro-His-Tyr-Asn-Pro-Leu-Ala-Val-Pro-His-Pro-Gln-His-Pro-Gly-Asp-Trp-Gly-Asn-Phe-Ala-Val-Arg-Asp-Gly-Ser-Leu-Trp-Pro-Phe-Leu-Arg-His-Asn-Val-Tyr-Gly-Arg-Pro-Arg-Ala-Sec-Val-Val-His-Ala-Gly-Glu-Asp。
2.根据权利要求1所述的一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽,其特征是,它的制备方法,包括以下步骤:
1)Se-CuZn-76P分子模型的建立与分析
以Se-CuZn-65P氨基酸序列为基础,连接上TAT序列(YGRKKRRQRRR),利用BLAST数据库和Homology模块进行同源序列比对并建立Se-CuZn-76P的三维结构模型,预测其活性变化;
BLAST搜索表明,天然SOD1(PDB entry 1HL5,1AZV),SOD3(PDB entry 2JLP)蛋白结构与Se-CuZn-76P有较高的同源性,依据其空间结构建立Se-CuZn-76P三维模型,优化后获得稳定结构,其具有发挥GPx活性的催化三联体(catalytic triad)结构和发挥SOD活性的金属离子配位(metal ion-coordinated)结构;
2)pColdⅠ(sp-4)-76P重组质粒的构建
参照OMEGAPlasmid Mini Kit I质粒提取试剂盒说明书:
将带有质粒的E.coli接种于5mL LB/抗生素培养液中,37℃摇床培养16h;
分次取5.0mL的菌液,室温下10000×g离心1min收集细菌,倒弃培养基;
加入250μl Solution Ⅰ/RNaseA混合液,旋窝震荡使细胞完全悬浮;
加入250μl Solution Ⅱ,轻轻颠倒混匀6次;
加入350μl Solution Ⅲ,温和颠倒数次至形成白色絮状沉淀;
室温下,≥10000×g离心10min;
转移上清液至套有2mL收集管的HiBind DNA结合柱中,室温下,10000×g离心1min,倒去收集管中的滤液;
把柱子重新装回收集管,加入500μl HB Buffer,按上述条件离心,弃去滤液;
把柱子重新装回收集管,加入700μl DNA Wash Buffer按上述条件离心,弃去滤液。注意:浓缩的DNA Wash Buffer在使用之前必需按标签的提示用无水乙醇稀释,重复一次;
弃去滤液,把柱子重新装回收集管,10000×g离心空柱2min以甩干柱子基质;
把柱子装在干净的1.5mL离心管上,加入50μl Elution Buffer到柱子基质中,静置2min,10000×g离心1min洗脱出DNA;
对pET28a-76P和pCold Ⅰ(sp-4)pPelB质粒进行提取,并采用Nde Ⅰ和Xba Ⅰ限制性核酸内切酶对这两个质粒分别双酶切,再用T4DNA连接酶进行连接,双酶切和连接体系如下:
双酶切体系20μL如下:
37℃温育4h,1.5%琼脂糖凝胶电泳鉴定酶切结果并回收酶切片段;
连接体系10μL如下:
双酶切后的76P基因 4.5μL
双酶切后的pColdⅠ(sp-4)载体 1.5μL
H2O 2.5μL
45℃温育5min,冷却至室温,使酶切的目的基因和载体进行粘端退火连接,然后加入10×连接缓冲液1μL,T4DNA连接酶0.5μL,16℃连接16h;
重组质粒经CaCl2法转化入E.coli DH5α感受态菌株中,在含有100μg/mL Amp的卢-贝(Luria-Bertani,LB)固体培养基中筛选后,挑取单克隆在含有100μg/mL Amp的LB液体培养基中扩增培养,提取pCold Ⅰ(sp-4)-76P质粒,再用1%琼脂糖凝胶电泳进行酶切鉴定;
pCold Ⅰ(sp-4)-76P质粒为4587bp,由76P氨基端被转录增强元件(translationenhancing element,TEE)、6×组氨酸标签(6×His-Tag)和凝血酶切位点(Factor Ⅹasite)所表达肽段保护,使其不能发挥穿膜作用而在胞浆内高效表达,由限制性内切酶NdeⅠ和Xba Ⅰ单、双酶切后1%琼脂糖凝胶电泳鉴定结果可知pCold Ⅰ(sp-4)-76P质粒构建成功;
3)Se-CuZn-76P的表达和蛋白切割
将pCold Ⅰ(sp-4)-76P质粒和pMzaF质粒共转化入E.coli BL21(DE3)selB:cysE51感受态菌株中,建立成SPP表达系统,然后采用半胱氨酸缺陷表达法表达和纯化。从转化平板上挑取阳性单克隆接种20mL LB,含100μg/mL Ampicillin,50μg/mL Kanamycin培养基中,37℃振荡培养过夜,将过夜的种子液接种于500mL M9 expression medium 1,含100μg/mLAmpicillin,100μg/mL Kanamycin,50μg/mL Cys培养基中,37℃振荡培养,当菌体的OD600达到1.0时,加入诱导剂IPTG使其终浓度达到1mM,37℃诱导10min,再加入Chloramphenicol终浓度为34μg/mL,37℃振荡培养5min后,6000rpm离心10min,弃上清液,菌体用与培养基等体积的0.9%NaCl重悬,6000rpm离心10min,弃上清液,重复洗涤一次,6000rpm离心15min,再次收集菌体,重悬于500mL M9 expression medium 2,含100μg/mL Ampicillin,100μg/mL Kanamycin培养基中,同时加入利福平至终浓度为400mg/L,37℃振荡培养5h,离心收集菌体,于50mM,Tris-HCl(pH7.5)缓冲液中反复洗涤两次,重悬于4倍体积的50mM,Tris-HCl,pH7.5溶液中,加入蛋白酶抑制剂PMSF,溶于100μg/mL异丙醇,冰浴下超声破碎菌体,15000rpm离心30min,收集上清液;
M9expression medium 1:6g/L Na2HPO4;3g/L KH2PO4;0.5g/L NaCl;1g/L NH4Cl;400μMH3BO4;30μM CoCl2;10μM CuSO4;80μM MnCl2;10μM ZnSO4;10μM FeCl3;18种常见氨基酸,无Cys,各100μg/mL;1%甘油;0.4%葡萄糖;2mM MgSO4或50μg/mL半胱氨酸盐酸盐;硫胺素(VB1)5μg/mL;
M9expression medium 2:10g/L K2HPO4;1g/L NH4Cl;10mg/L CaCl2;3.6mg/L FeCl2;429mg/L MgAc;2g/L NaAc;丙氨酸、谷氨酸、谷氨酰胺、精氨酸、甘氨酸各400μg/mL;天门冬氨酸、天门冬酰胺、甲硫氨酸、组氨酸各250μg/mL;异亮氨酸、亮氨酸、赖氨酸、脯氨酸、苏氨酸、缬氨酸、酪氨酸各100μg/mL;色氨酸50μg/mL;丝氨酸1600μg/mL;0.5%甘油;0.2%蔗糖;胞嘧啶、鸟苷、脲嘧啶各125μg/mL,胸腺嘧啶50μg/mL;胺素(VB1)50μg/mL;烟酸50μg/mL;生物素100ng/mL;硒代胱氨酸200mg/L;
经Cys缺陷型表达后,把菌液6000rpm离心收集,弃上清,沉淀重悬于25mM,Tris-HCl,pH8.0缓冲液中,清洗3次后,超声破碎,留上清,用醋酸调pH值为5.2~5.4,加入终浓度为0.1mM的CuSO4室温放置1h,然后加入终浓度为0.1mM的ZnSO4室温放置30min,用25mM Tris-HCl缓冲液再次调整pH值为8.0,超滤浓缩后,蛋白上清经DEAE阴离子交换柱层析,用10倍柱体积的0~100mM NaCl洗脱,目的蛋白出现在20mM NaCl的洗脱液中,收集洗脱峰,用10mMPBS透析后,分别用截留分子量5KD和10KD的Millipore超滤离心管超滤,浓缩,用Tricine-SDS-PAGE鉴定目的小肽Se-CuZn-76P;
在表达0,12,24,48,72,96,120h时6000rpm离心10min收集沉淀;用50mMTris-HCl,pH8.0缓冲液中反复洗涤两次,重悬于4倍体积的50mM Tris-HCl,pH 8.0溶液中,冰浴下超声破碎菌体,15000rpm离心30min后收集上清液,用0.45mm滤膜过滤,考马斯亮蓝G-250方法测定表达蛋白浓度,用2%(w/w)的凝血酶对表达蛋白进行酶切,反应条件23℃,24h,用截留分子为3kDa的Milliproe超滤离心管收集目的肽,冻干备用,获得76肽。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710166713.9A CN106834247A (zh) | 2017-03-20 | 2017-03-20 | 一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710166713.9A CN106834247A (zh) | 2017-03-20 | 2017-03-20 | 一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106834247A true CN106834247A (zh) | 2017-06-13 |
Family
ID=59130378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710166713.9A Pending CN106834247A (zh) | 2017-03-20 | 2017-03-20 | 一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106834247A (zh) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102373188A (zh) * | 2011-09-26 | 2012-03-14 | 吉林大学 | 一种兼具SOD和GPx活性的65肽 |
EP2891661A1 (en) * | 2012-08-31 | 2015-07-08 | University-Industry Cooperation Group of Kyung Hee University | Mitochondrial targeting peptide |
-
2017
- 2017-03-20 CN CN201710166713.9A patent/CN106834247A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102373188A (zh) * | 2011-09-26 | 2012-03-14 | 吉林大学 | 一种兼具SOD和GPx活性的65肽 |
EP2891661A1 (en) * | 2012-08-31 | 2015-07-08 | University-Industry Cooperation Group of Kyung Hee University | Mitochondrial targeting peptide |
Non-Patent Citations (5)
Title |
---|
党双锁: "《医学常用实验技术精编》", 30 June 2004, 世界图书出版西安公司 * |
史济平: "《药学分子生物学 第3版》", 30 November 2000, 人民卫生出版社 * |
湖北大学教务处: "《湖北大学2001届本科生优秀毕业论文(设计)选编 下》", 31 May 2002 * |
王程: "含硒蛋白质(多肽)的制各及其抗氧化效应研究", 《中国博士学位论文全文数据库》 * |
陈清西: "《酶学及其研究技术》", 31 May 2015, 厦门大学出版社 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SERRANO | Plasma membrane ATPase of fungi and plants as a novel type of proton pump | |
Searcy et al. | Phylogenetic affinities between eukaryotic cells and a thermophilic mycoplasma | |
CN103865797B (zh) | 一种富硒枯草芽孢杆菌酶解物及其制备方法 | |
JP6868611B2 (ja) | スーパーオキシドジスムターゼ(sod)に富むテトラセルミス チュイイ種の微小藻類のバイオマスを得る方法 | |
CN101962637B (zh) | 一种蛹虫草纤溶酶及其培制方法 | |
CN1332027C (zh) | 一种重组人tPA的制备方法 | |
CN106834247A (zh) | 一种兼具细胞膜穿透效应和双抗氧化物酶活性的76肽及其制备方法 | |
CN115417935A (zh) | 一种海藻硒多糖的制备方法 | |
CN102559631B (zh) | 小金海棠MxHA5蛋白及其编码基因与应用 | |
CN102433289B (zh) | 一株产瓜氨酸的菌株及用该菌株生物合成瓜氨酸的方法 | |
CN108823118A (zh) | 一株能抑制α-葡萄糖苷酶活性的勒克菌及其应用 | |
Khayoon et al. | Cleavage of Mucin by Partial Purified Protease Produced from Gastrointestinal Escherichia Coli A29 Isolated from Iraqi Patients | |
CN105087510A (zh) | 一种重组Cu/Zn-SOD的发酵制备方法 | |
Yan et al. | Purification and characterization of a hydrogenase from the marine green alga Tetraselmis subcordiformis | |
CN101410529A (zh) | 白细胞介素-2制剂的制备方法及可用该方法制备的制剂 | |
Thomas | Isolation and base composition of DNA from normal and tumorous carrot tissues | |
CN109370996A (zh) | 一种过氧化氢酶纯净化提纯方法 | |
JPH0789920B2 (ja) | 微生物による−α−N−アセチルガラクトサミニダーゼの製造法 | |
Unissa et al. | In vitro anticancer activity of L-arginase produced from Idiomarina sediminum; H1695 | |
CN114525211B (zh) | 一株杂色曲霉zlh-1、蛋白酶及其制备方法和应用 | |
CN101070522A (zh) | 用产朊圆酵母菌在诱导培养基中生产尿酸酶的方法 | |
CN101759778A (zh) | 一种蜘蛛活性多肽及其制备方法与应用 | |
JPS60197626A (ja) | 血圧降下剤 | |
CN104830821A (zh) | 一种蜡样芽胞杆菌胶原酶的纯化方法 | |
JP4670077B2 (ja) | 生理活性高分子物質の精製方法及びその方法により得られる精製物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |
|
RJ01 | Rejection of invention patent application after publication |