CN112961879A - 一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 - Google Patents
一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 Download PDFInfo
- Publication number
- CN112961879A CN112961879A CN202110219450.XA CN202110219450A CN112961879A CN 112961879 A CN112961879 A CN 112961879A CN 202110219450 A CN202110219450 A CN 202110219450A CN 112961879 A CN112961879 A CN 112961879A
- Authority
- CN
- China
- Prior art keywords
- essential gene
- gene
- bacillus subtilis
- regulatory
- output
- 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
- 235000014469 Bacillus subtilis Nutrition 0.000 title claims abstract description 49
- 244000063299 Bacillus subtilis Species 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- SQVRNKJHWKZAKO-UHFFFAOYSA-N beta-N-Acetyl-D-neuraminic acid Natural products CC(=O)NC1C(O)CC(O)(C(O)=O)OC1C(O)C(O)CO SQVRNKJHWKZAKO-UHFFFAOYSA-N 0.000 title claims abstract description 26
- SQVRNKJHWKZAKO-PFQGKNLYSA-N N-acetyl-beta-neuraminic acid Chemical compound CC(=O)N[C@@H]1[C@@H](O)C[C@@](O)(C(O)=O)O[C@H]1[C@H](O)[C@H](O)CO SQVRNKJHWKZAKO-PFQGKNLYSA-N 0.000 title claims abstract description 24
- 230000033228 biological regulation Effects 0.000 claims abstract description 45
- 230000009977 dual effect Effects 0.000 claims abstract description 10
- 108700039887 Essential Genes Proteins 0.000 claims description 52
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000013518 transcription Methods 0.000 claims description 23
- 230000035897 transcription Effects 0.000 claims description 23
- 101150043569 ftsW gene Proteins 0.000 claims description 20
- 230000014509 gene expression Effects 0.000 claims description 20
- 101150054323 nanR gene Proteins 0.000 claims description 16
- 239000013612 plasmid Substances 0.000 claims description 16
- 108090000623 proteins and genes Proteins 0.000 claims description 16
- 102000034356 gene-regulatory proteins Human genes 0.000 claims description 15
- 108091006104 gene-regulatory proteins Proteins 0.000 claims description 15
- 101150011175 folB gene Proteins 0.000 claims description 13
- 239000012634 fragment Substances 0.000 claims description 12
- 108091026890 Coding region Proteins 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000002773 nucleotide Substances 0.000 claims description 8
- 125000003729 nucleotide group Chemical group 0.000 claims description 8
- 230000001939 inductive effect Effects 0.000 claims description 7
- 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 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- PXZWKVIXSKSCFR-UHFFFAOYSA-N 7,8-dihydropterin Chemical compound N1=CCNC2=C1C(=O)N=C(N)N2 PXZWKVIXSKSCFR-UHFFFAOYSA-N 0.000 claims description 3
- 108010068561 Fructose-Bisphosphate Aldolase Proteins 0.000 claims description 3
- 108091079148 SEDS family Proteins 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 229960000723 ampicillin Drugs 0.000 claims description 2
- 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 2
- 239000003242 anti bacterial agent Substances 0.000 claims description 2
- 230000003115 biocidal effect Effects 0.000 claims description 2
- 229960005091 chloramphenicol Drugs 0.000 claims description 2
- 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 2
- 238000000855 fermentation Methods 0.000 abstract description 19
- 230000004151 fermentation Effects 0.000 abstract description 19
- 238000012269 metabolic engineering Methods 0.000 abstract description 5
- 230000035772 mutation Effects 0.000 abstract description 5
- 238000010353 genetic engineering Methods 0.000 abstract description 2
- SQVRNKJHWKZAKO-LUWBGTNYSA-N N-acetylneuraminic acid Chemical compound CC(=O)N[C@@H]1[C@@H](O)CC(O)(C(O)=O)O[C@H]1[C@H](O)[C@H](O)CO SQVRNKJHWKZAKO-LUWBGTNYSA-N 0.000 abstract 1
- 229940060155 neuac Drugs 0.000 abstract 1
- CERZMXAJYMMUDR-UHFFFAOYSA-N neuraminic acid Natural products NC1C(O)CC(O)(C(O)=O)OC1C(O)C(O)CO CERZMXAJYMMUDR-UHFFFAOYSA-N 0.000 abstract 1
- 108020004414 DNA Proteins 0.000 description 11
- 238000010276 construction Methods 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 5
- 230000012010 growth Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002609 medium Substances 0.000 description 4
- 238000012408 PCR amplification Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000012258 culturing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 241000276408 Bacillus subtilis subsp. subtilis str. 168 Species 0.000 description 2
- 239000012880 LB liquid culture medium Substances 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 101150052370 fol1 gene Proteins 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 108010012581 phenylalanylglutamate Proteins 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 239000012137 tryptone Substances 0.000 description 2
- PJNSIUPOXFBHDM-GUBZILKMSA-N Ala-Arg-Val Chemical compound [H]N[C@@H](C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](C(C)C)C(O)=O PJNSIUPOXFBHDM-GUBZILKMSA-N 0.000 description 1
- BTYTYHBSJKQBQA-GCJQMDKQSA-N Ala-Asp-Thr Chemical compound C[C@H]([C@@H](C(=O)O)NC(=O)[C@H](CC(=O)O)NC(=O)[C@H](C)N)O BTYTYHBSJKQBQA-GCJQMDKQSA-N 0.000 description 1
- FAJIYNONGXEXAI-CQDKDKBSSA-N Ala-His-Phe Chemical compound C([C@H](NC(=O)[C@@H](N)C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(O)=O)C1=CNC=N1 FAJIYNONGXEXAI-CQDKDKBSSA-N 0.000 description 1
- DVJSJDDYCYSMFR-ZKWXMUAHSA-N Ala-Ile-Gly Chemical compound [H]N[C@@H](C)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(O)=O DVJSJDDYCYSMFR-ZKWXMUAHSA-N 0.000 description 1
- CCDFBRZVTDDJNM-GUBZILKMSA-N Ala-Leu-Glu Chemical compound [H]N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(O)=O)C(O)=O CCDFBRZVTDDJNM-GUBZILKMSA-N 0.000 description 1
- LTTLSZVJTDSACD-OWLDWWDNSA-N Ala-Thr-Trp Chemical compound [H]N[C@@H](C)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC1=CNC2=C1C=CC=C2)C(O)=O LTTLSZVJTDSACD-OWLDWWDNSA-N 0.000 description 1
- UXJCMQFPDWCHKX-DCAQKATOSA-N Arg-Arg-Glu Chemical compound NC(N)=NCCC[C@H](N)C(=O)N[C@@H](CCCN=C(N)N)C(=O)N[C@@H](CCC(O)=O)C(O)=O UXJCMQFPDWCHKX-DCAQKATOSA-N 0.000 description 1
- BVBKBQRPOJFCQM-DCAQKATOSA-N Arg-Asn-Leu Chemical compound [H]N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(O)=O BVBKBQRPOJFCQM-DCAQKATOSA-N 0.000 description 1
- NGTYEHIRESTSRX-UWVGGRQHSA-N Arg-Lys-Gly Chemical compound NCCCC[C@@H](C(=O)NCC(O)=O)NC(=O)[C@@H](N)CCCN=C(N)N NGTYEHIRESTSRX-UWVGGRQHSA-N 0.000 description 1
- BTJVOUQWFXABOI-IHRRRGAJSA-N Arg-Lys-Lys Chemical compound NCCCC[C@@H](C(O)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@@H](N)CCCNC(N)=N BTJVOUQWFXABOI-IHRRRGAJSA-N 0.000 description 1
- ATABBWFGOHKROJ-GUBZILKMSA-N Arg-Pro-Ser Chemical compound [H]N[C@@H](CCCNC(N)=N)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CO)C(O)=O ATABBWFGOHKROJ-GUBZILKMSA-N 0.000 description 1
- VENMDXUVHSKEIN-GUBZILKMSA-N Arg-Ser-Arg Chemical compound NC(N)=NCCC[C@H](N)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCN=C(N)N)C(O)=O VENMDXUVHSKEIN-GUBZILKMSA-N 0.000 description 1
- QHBMKQWOIYJYMI-BYULHYEWSA-N Asn-Asn-Val Chemical compound [H]N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](C(C)C)C(O)=O QHBMKQWOIYJYMI-BYULHYEWSA-N 0.000 description 1
- ZYPWIUFLYMQZBS-SRVKXCTJSA-N Asn-Lys-Lys Chemical compound C(CCN)C[C@@H](C(=O)N[C@@H](CCCCN)C(=O)O)NC(=O)[C@H](CC(=O)N)N ZYPWIUFLYMQZBS-SRVKXCTJSA-N 0.000 description 1
- NJSNXIOKBHPFMB-GMOBBJLQSA-N Asn-Pro-Ile Chemical compound CC[C@H](C)[C@@H](C(=O)O)NC(=O)[C@@H]1CCCN1C(=O)[C@H](CC(=O)N)N NJSNXIOKBHPFMB-GMOBBJLQSA-N 0.000 description 1
- HSWYMWGDMPLTTH-FXQIFTODSA-N Asp-Glu-Gln Chemical compound [H]N[C@@H](CC(O)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCC(N)=O)C(O)=O HSWYMWGDMPLTTH-FXQIFTODSA-N 0.000 description 1
- LTCKTLYKRMCFOC-KKUMJFAQSA-N Asp-Phe-Leu Chemical compound [H]N[C@@H](CC(O)=O)C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CC(C)C)C(O)=O LTCKTLYKRMCFOC-KKUMJFAQSA-N 0.000 description 1
- MGSVBZIBCCKGCY-ZLUOBGJFSA-N Asp-Ser-Ser Chemical compound [H]N[C@@H](CC(O)=O)C(=O)N[C@@H](CO)C(=O)N[C@@H](CO)C(O)=O MGSVBZIBCCKGCY-ZLUOBGJFSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 108050001049 Extracellular proteins Proteins 0.000 description 1
- 241000192125 Firmicutes Species 0.000 description 1
- KVYVOGYEMPEXBT-GUBZILKMSA-N Gln-Ala-Leu Chemical compound CC(C)C[C@@H](C(O)=O)NC(=O)[C@H](C)NC(=O)[C@@H](N)CCC(N)=O KVYVOGYEMPEXBT-GUBZILKMSA-N 0.000 description 1
- KQOPMGBHNQBCEL-HVTMNAMFSA-N Gln-His-Ile Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC1=CNC=N1)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O KQOPMGBHNQBCEL-HVTMNAMFSA-N 0.000 description 1
- DOMHVQBSRJNNKD-ZPFDUUQYSA-N Gln-Met-Ile Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCSC)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O DOMHVQBSRJNNKD-ZPFDUUQYSA-N 0.000 description 1
- DUGYCMAIAKAQPB-GLLZPBPUSA-N Gln-Thr-Glu Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(O)=O DUGYCMAIAKAQPB-GLLZPBPUSA-N 0.000 description 1
- STHSGOZLFLFGSS-SUSMZKCASA-N Gln-Thr-Thr Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H]([C@@H](C)O)C(O)=O STHSGOZLFLFGSS-SUSMZKCASA-N 0.000 description 1
- CGYDXNKRIMJMLV-GUBZILKMSA-N Glu-Arg-Glu Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCC(O)=O)C(O)=O CGYDXNKRIMJMLV-GUBZILKMSA-N 0.000 description 1
- PVBBEKPHARMPHX-DCAQKATOSA-N Glu-Gln-Leu Chemical compound CC(C)C[C@@H](C(O)=O)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](N)CCC(O)=O PVBBEKPHARMPHX-DCAQKATOSA-N 0.000 description 1
- VXQOONWNIWFOCS-HGNGGELXSA-N Glu-His-Ala Chemical compound C[C@@H](C(=O)O)NC(=O)[C@H](CC1=CN=CN1)NC(=O)[C@H](CCC(=O)O)N VXQOONWNIWFOCS-HGNGGELXSA-N 0.000 description 1
- IRXNJYPKBVERCW-DCAQKATOSA-N Glu-Leu-Glu Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(O)=O)C(O)=O IRXNJYPKBVERCW-DCAQKATOSA-N 0.000 description 1
- FBEJIDRSQCGFJI-GUBZILKMSA-N Glu-Leu-Ser Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(O)=O FBEJIDRSQCGFJI-GUBZILKMSA-N 0.000 description 1
- VNCNWQPIQYAMAK-ACZMJKKPSA-N Glu-Ser-Ser Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(=O)N[C@@H](CO)C(O)=O VNCNWQPIQYAMAK-ACZMJKKPSA-N 0.000 description 1
- 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 description 1
- DHDOADIPGZTAHT-YUMQZZPRSA-N Gly-Glu-Arg Chemical compound NCC(=O)N[C@@H](CCC(O)=O)C(=O)N[C@H](C(O)=O)CCCN=C(N)N DHDOADIPGZTAHT-YUMQZZPRSA-N 0.000 description 1
- HFXJIZNEXNIZIJ-BQBZGAKWSA-N Gly-Glu-Gln Chemical compound NCC(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCC(N)=O)C(O)=O HFXJIZNEXNIZIJ-BQBZGAKWSA-N 0.000 description 1
- XMPXVJIDADUOQB-RCOVLWMOSA-N Gly-Gly-Ile Chemical compound CC[C@H](C)[C@@H](C([O-])=O)NC(=O)CNC(=O)C[NH3+] XMPXVJIDADUOQB-RCOVLWMOSA-N 0.000 description 1
- SWQALSGKVLYKDT-UHFFFAOYSA-N Gly-Ile-Ala Natural products NCC(=O)NC(C(C)CC)C(=O)NC(C)C(O)=O SWQALSGKVLYKDT-UHFFFAOYSA-N 0.000 description 1
- DBJYVKDPGIFXFO-BQBZGAKWSA-N Gly-Met-Ala Chemical compound [H]NCC(=O)N[C@@H](CCSC)C(=O)N[C@@H](C)C(O)=O DBJYVKDPGIFXFO-BQBZGAKWSA-N 0.000 description 1
- FLUVGKKRRMLNPU-CQDKDKBSSA-N His-Ala-Phe Chemical compound [H]N[C@@H](CC1=CNC=N1)C(=O)N[C@@H](C)C(=O)N[C@@H](CC1=CC=CC=C1)C(O)=O FLUVGKKRRMLNPU-CQDKDKBSSA-N 0.000 description 1
- XMENRVZYPBKBIL-AVGNSLFASA-N His-Glu-His Chemical compound N[C@@H](Cc1cnc[nH]1)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](Cc1cnc[nH]1)C(O)=O XMENRVZYPBKBIL-AVGNSLFASA-N 0.000 description 1
- JENKOCSDMSVWPY-SRVKXCTJSA-N His-Leu-Asn Chemical compound [H]N[C@@H](CC1=CNC=N1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC(N)=O)C(O)=O JENKOCSDMSVWPY-SRVKXCTJSA-N 0.000 description 1
- QYZYJFXHXYUZMZ-UGYAYLCHSA-N Ile-Asn-Asn Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CC(=O)N)C(=O)N[C@@H](CC(=O)N)C(=O)O)N QYZYJFXHXYUZMZ-UGYAYLCHSA-N 0.000 description 1
- HDODQNPMSHDXJT-GHCJXIJMSA-N Ile-Asn-Ser Chemical compound CC[C@H](C)[C@H](N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CO)C(O)=O HDODQNPMSHDXJT-GHCJXIJMSA-N 0.000 description 1
- RGSOCXHDOPQREB-ZPFDUUQYSA-N Ile-Asp-Leu Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CC(C)C)C(=O)O)N RGSOCXHDOPQREB-ZPFDUUQYSA-N 0.000 description 1
- YNMQUIVKEFRCPH-QSFUFRPTSA-N Ile-Ile-Gly Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)O)N YNMQUIVKEFRCPH-QSFUFRPTSA-N 0.000 description 1
- KCTIFOCXAIUQQK-QXEWZRGKSA-N Ile-Pro-Gly Chemical compound CC[C@H](C)[C@H](N)C(=O)N1CCC[C@H]1C(=O)NCC(O)=O KCTIFOCXAIUQQK-QXEWZRGKSA-N 0.000 description 1
- SITWEMZOJNKJCH-UHFFFAOYSA-N L-alanine-L-arginine Natural products CC(N)C(=O)NC(C(O)=O)CCCNC(N)=N SITWEMZOJNKJCH-UHFFFAOYSA-N 0.000 description 1
- CQQGCWPXDHTTNF-GUBZILKMSA-N Leu-Ala-Glu Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@H](C(O)=O)CCC(O)=O CQQGCWPXDHTTNF-GUBZILKMSA-N 0.000 description 1
- KWTVLKBOQATPHJ-SRVKXCTJSA-N Leu-Ala-Lys Chemical compound C[C@@H](C(=O)N[C@@H](CCCCN)C(=O)O)NC(=O)[C@H](CC(C)C)N KWTVLKBOQATPHJ-SRVKXCTJSA-N 0.000 description 1
- GPICTNQYKHHHTH-GUBZILKMSA-N Leu-Gln-Ser Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CO)C(O)=O GPICTNQYKHHHTH-GUBZILKMSA-N 0.000 description 1
- CPONGMJGVIAWEH-DCAQKATOSA-N Leu-Met-Ala Chemical compound CSCC[C@H](NC(=O)[C@@H](N)CC(C)C)C(=O)N[C@@H](C)C(O)=O CPONGMJGVIAWEH-DCAQKATOSA-N 0.000 description 1
- MJWVXZABPOKJJF-ACRUOGEOSA-N Leu-Phe-Phe Chemical compound [H]N[C@@H](CC(C)C)C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CC1=CC=CC=C1)C(O)=O MJWVXZABPOKJJF-ACRUOGEOSA-N 0.000 description 1
- CHJKEDSZNSONPS-DCAQKATOSA-N Leu-Pro-Ser Chemical compound [H]N[C@@H](CC(C)C)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CO)C(O)=O CHJKEDSZNSONPS-DCAQKATOSA-N 0.000 description 1
- FBNPMTNBFFAMMH-AVGNSLFASA-N Leu-Val-Arg Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](C(C)C)C(=O)N[C@H](C(O)=O)CCCN=C(N)N FBNPMTNBFFAMMH-AVGNSLFASA-N 0.000 description 1
- FBNPMTNBFFAMMH-UHFFFAOYSA-N Leu-Val-Arg Natural products CC(C)CC(N)C(=O)NC(C(C)C)C(=O)NC(C(O)=O)CCCN=C(N)N FBNPMTNBFFAMMH-UHFFFAOYSA-N 0.000 description 1
- MVJRBCJCRYGCKV-GVXVVHGQSA-N Leu-Val-Gln Chemical compound [H]N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(O)=O MVJRBCJCRYGCKV-GVXVVHGQSA-N 0.000 description 1
- 239000006142 Luria-Bertani Agar Substances 0.000 description 1
- DCHHUGLTVLJYKA-FXQIFTODSA-N Met-Asn-Ala Chemical compound CSCC[C@H](N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](C)C(O)=O DCHHUGLTVLJYKA-FXQIFTODSA-N 0.000 description 1
- MYAPQOBHGWJZOM-UWVGGRQHSA-N Met-Gly-Leu Chemical compound CSCC[C@H](N)C(=O)NCC(=O)N[C@H](C(O)=O)CC(C)C MYAPQOBHGWJZOM-UWVGGRQHSA-N 0.000 description 1
- YBAFDPFAUTYYRW-UHFFFAOYSA-N N-L-alpha-glutamyl-L-leucine Natural products CC(C)CC(C(O)=O)NC(=O)C(N)CCC(O)=O YBAFDPFAUTYYRW-UHFFFAOYSA-N 0.000 description 1
- 108010002311 N-glycylglutamic acid Proteins 0.000 description 1
- 101150098863 N1 gene Proteins 0.000 description 1
- OJUMUUXGSXUZJZ-SRVKXCTJSA-N Phe-Asp-Ser Chemical compound [H]N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CO)C(O)=O OJUMUUXGSXUZJZ-SRVKXCTJSA-N 0.000 description 1
- ZLGQEBCCANLYRA-RYUDHWBXSA-N Phe-Gly-Glu Chemical compound [H]N[C@@H](CC1=CC=CC=C1)C(=O)NCC(=O)N[C@@H](CCC(O)=O)C(O)=O ZLGQEBCCANLYRA-RYUDHWBXSA-N 0.000 description 1
- SZYBZVANEAOIPE-UBHSHLNASA-N Phe-Met-Ala Chemical compound [H]N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](C)C(O)=O SZYBZVANEAOIPE-UBHSHLNASA-N 0.000 description 1
- FMLRRBDLBJLJIK-DCAQKATOSA-N Pro-Leu-Ala Chemical compound OC(=O)[C@H](C)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H]1CCCN1 FMLRRBDLBJLJIK-DCAQKATOSA-N 0.000 description 1
- 101150018498 RBS1 gene Proteins 0.000 description 1
- GRSLLFZTTLBOQX-CIUDSAMLSA-N Ser-Glu-Met Chemical compound CSCC[C@@H](C(=O)O)NC(=O)[C@H](CCC(=O)O)NC(=O)[C@H](CO)N GRSLLFZTTLBOQX-CIUDSAMLSA-N 0.000 description 1
- MLSQXWSRHURDMF-GARJFASQSA-N Ser-His-Pro Chemical compound C1C[C@@H](N(C1)C(=O)[C@H](CC2=CN=CN2)NC(=O)[C@H](CO)N)C(=O)O MLSQXWSRHURDMF-GARJFASQSA-N 0.000 description 1
- VEVYMLNYMULSMS-AVGNSLFASA-N Ser-Tyr-Gln Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H](CC1=CC=C(O)C=C1)C(=O)N[C@@H](CCC(N)=O)C(O)=O VEVYMLNYMULSMS-AVGNSLFASA-N 0.000 description 1
- JGUWRQWULDWNCM-FXQIFTODSA-N Ser-Val-Ser Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CO)C(O)=O JGUWRQWULDWNCM-FXQIFTODSA-N 0.000 description 1
- VCXWRWYFJLXITF-AUTRQRHGSA-N Tyr-Ala-Ala Chemical compound OC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@@H](N)CC1=CC=C(O)C=C1 VCXWRWYFJLXITF-AUTRQRHGSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- SZTTYWIUCGSURQ-AUTRQRHGSA-N Val-Glu-Glu Chemical compound CC(C)[C@H](N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCC(O)=O)C(O)=O SZTTYWIUCGSURQ-AUTRQRHGSA-N 0.000 description 1
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 108010005233 alanylglutamic acid Proteins 0.000 description 1
- 108010011559 alanylphenylalanine Proteins 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 108010060035 arginylproline Proteins 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000011021 bench scale process Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000004641 brain development Effects 0.000 description 1
- 230000036995 brain health Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 238000010367 cloning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XQGPKZUNMMFTAL-UHFFFAOYSA-L dipotassium;hydrogen phosphate;trihydrate Chemical compound O.O.O.[K+].[K+].OP([O-])([O-])=O XQGPKZUNMMFTAL-UHFFFAOYSA-L 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012262 fermentative production Methods 0.000 description 1
- 108010063718 gamma-glutamylaspartic acid Proteins 0.000 description 1
- 235000021474 generally recognized As safe (food) Nutrition 0.000 description 1
- 235000021473 generally recognized as safe (food ingredients) Nutrition 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 108010050848 glycylleucine Proteins 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 101150044508 key gene Proteins 0.000 description 1
- 101150109249 lacI gene Proteins 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 235000020939 nutritional additive Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000012450 pharmaceutical intermediate Substances 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 108010020755 prolyl-glycyl-glycine Proteins 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 108010048818 seryl-histidine Proteins 0.000 description 1
- 108010026333 seryl-proline Proteins 0.000 description 1
- SQVRNKJHWKZAKO-OQPLDHBCSA-N sialic acid Chemical compound CC(=O)N[C@@H]1[C@@H](O)C[C@@](O)(C(O)=O)OC1[C@H](O)[C@H](O)CO SQVRNKJHWKZAKO-OQPLDHBCSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 108010029384 tryptophyl-histidine Proteins 0.000 description 1
Images
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
- 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
- C12N15/74—Vectors or expression systems specially adapted for prokaryotic hosts other than E. coli, e.g. Lactobacillus, Micromonospora
- C12N15/75—Vectors or expression systems specially adapted for prokaryotic hosts other than E. coli, e.g. Lactobacillus, Micromonospora for Bacillus
-
- 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
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
-
- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/88—Lyases (4.)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/26—Preparation of nitrogen-containing carbohydrates
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y204/00—Glycosyltransferases (2.4)
- C12Y204/01—Hexosyltransferases (2.4.1)
- C12Y204/01129—Peptidoglycan glycosyltransferase (2.4.1.129)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y401/00—Carbon-carbon lyases (4.1)
- C12Y401/02—Aldehyde-lyases (4.1.2)
- C12Y401/02025—Dihydroneopterin aldolase (4.1.2.25)
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
本发明公开了一种N‑乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌,属于枯草芽孢杆菌代谢工程和基因工程技术领域。本发明通过将两个单输出细胞亚群调控回路组合,构建了一种可以提高亚群调控回路稳定性的的双输出亚群调控回路。在双输出亚群调控回路中,存在两个传感器启动子Pveg105作为输出启动子,只有当两个Pveg105同时发生遗传突变,细胞亚群调控回路才会失效,这增加了亚群调控回路的稳定性。所得到的重组枯草芽孢杆菌可以在96h的连续传代发酵培养过程中一直维持NeuAc生产,且产量稳定在0.65‑0.90g/L。
Description
技术领域
本发明涉及一种N-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌,属于枯草芽孢杆菌代谢工程和基因工程技术领域。
背景技术
目前在实验室小试规模可以实现利用微生物细胞工厂生产多种目标化合物,但是能实现商业化应用的生物过程很少。从实验室小试规模放大到工业生产规模的过程中,由于遗传突变导致的遗传异质性、复杂调控的表型异质性、以及发酵过程中难以控制的环境异质性等原因,由一个单克隆细胞发展而来的生产群体在发酵过程中存在生产和非生产细胞。生产细胞因生产负担常常表现为降低的适应能力,因此,更加具有生长优势的非生产细胞在发酵过程中会逐步取代生产细胞,从而占据整个生物反应器,降低微生物细胞工厂的生产稳定性,这限制了很多生物过程的工业化应用。目前虽已开发有细胞亚群调控回路富集发酵过程中的生产细胞亚群,但是他们都是用单拷贝的传感器启动子调控生长关键基因来赋予生产细胞生长优势。单拷贝的传感器启动子的遗传突变可导致亚群调控回路失效,因此有待开发更稳定的亚群调控回路,从而进一步提高重组菌的生产稳定性。枯草芽孢杆菌(Bacillus subtilis)是革兰氏阳性菌的模式微生物,由于它的GRAS身份,以及生长速率快、发酵培养时间短、培养条件要求低、易于进行代谢工程改造和分泌蛋白质能力强等等优势,在工业上应用十分广泛,在生产蛋白和高附加值化合物的生产上具有非常重要的地位。N-乙酰神经氨酸(NeuAc)又名唾液酸,燕窝酸,是一种重要的营养添加剂和药物中间体,在促进婴儿大脑发育,维持大脑健康和增强免疫力方面发挥着关键作用。此种NeuAc生产稳定性提高的重组枯草芽孢杆菌菌株的构建不仅为高附加值化合物NeuAc发酵法大规模生产奠定了基础,还为枯草芽孢杆菌的代谢工程改造提供新的有效方法。
发明内容
技术问题
现有技术中,使用单拷贝的传感器启动子调控生长关键基因来赋予生产细胞生长优势,没有考虑到细胞生长过程中单拷贝的传感器启动子易发生遗传突变,影响传代和生产的稳定性。
技术方案
提供一种提高重组枯草芽孢杆菌N-乙酰神经氨酸生产稳定性的方法。本发明通过将两个单输出细胞亚群调控回路组合,构建了一种可以提高亚群调控回路稳定性的的双输出亚群调控回路。
本发明的第一个目的是提供一种双输出亚群调控回路,所述调控回路是包含第一必需基因调控模块和第二必需基因调控模块的质粒。
在一种实施方式中,所述必需基因包括但不限于二氢蝶呤醛缩酶基因folB、SEDS家族肽聚糖糖基转移酶基因ftsW。
在一种实施方式中,所述第一必需基因调控模块包括:启动子Pveg105、RBS1、第一必需基因和阻遏蛋白lac I表达框。
在一种实施方式中,所述第二必需基因调控模块包括:启动子Pveg105、RBS0、N端编码序列N1、第二必需基因、IPTG诱导型启动子Pgrac2、转录调控蛋白nanR的编码基因。
在一种实施方式中,所述第一必需基因是二氢蝶呤醛缩酶基因folB,所述第二必需基因是SEDS家族肽聚糖糖基转移酶基因ftsW。
在一种实施方式中,所述质粒上还含有抗生素基因;包括但不限于氯霉素抗性基因CmR、氨苄青霉素抗性基因AmpR。
在一种实施方式中,所述第一必需基因调控模块中,启动子Pveg105和RBS1调控第一必需基因表达;
所述第二必需基因调控模块中,启动子Pveg105、RBS0和N端编码序列N1调控第二必需基因表达;所述IPTG诱导型启动子Pgrac2和RBS0调控转录调控蛋白nanR表达;
所述第一必需基因与lac I表达框转录方向相对,所述第二必需基因和转录调控蛋白nanR转录方向相对;所述第一必需基因和lac I表达框之间具有一个双向终止子,转录调控蛋白nanR的编码基因和第二必需基因之间具有一个双向终止子。
在一种实施方式中,所述双输出细胞亚群调控回路是以pHT01为载体骨架。
在一种实施方式中,所述lac I表达框的核苷酸序列如SEQ ID NO.3所示。
在一种实施方式中,所述IPTG诱导型启动子Pgrac2的核苷酸序列如SEQ ID NO.2所示,RBS0的核苷酸序列如SEQ ID NO.4所示;编码转录调控蛋白nanR的基因序列如SEQ IDNO.5所示。
在一种实施方式中,启动子Pveg105的核苷酸序列如SEQ ID NO.7所示;RBS1的碱基序列如SEQ ID NO.8所示。
在一种实施方式中,必需基因folB的核苷酸序列如SEQ ID NO.9所示。
在一种实施方式中,必需基因ftsW的核苷酸序列如SEQ ID NO.10所示。
在一种实施方式中,必需基因ftsW的N端序列N1如SEQ ID NO.11所示。
本发明的第二个目的是提供所述双输出细胞亚群调控回路的构建方法。
在一种实施方式中,所述双输出细胞亚群调控回路是以细胞亚群调控回路1.1为模板,使用引物fp-1.1-9.8k-f/r扩增得到线性化亚群调控回路1.1;以细胞亚群调控回路1.3为模板,使用引物ftsW-1.6k-f/r扩增得到包括Pveg105、RBS0、N端编码序列N1和必需基因ftsW的线性片段;将两个片段连接获得双输出细胞亚群调控回路。
所述,所述细胞亚群调控回路1.1和细胞亚群调控回路1.3记载于公开号CN112342234A的专利。
在一种实施方式中,所述双输出亚群调控质粒的碱基序列如SEQ ID NO.1所示。
本发明的第三个目的是提供一种提高重组枯草芽孢杆菌N-乙酰神经氨酸生产稳定性的方法。
在一种实施方式中,所述方法通过将所述双输出亚群调控回路转化先至枯草芽孢杆菌细胞中,再缺失枯草芽孢杆菌的必需基因folB和ftsW。
在一种实施方式中,所述枯草芽孢杆菌是低产N-乙酰神经氨酸的重组枯草芽孢杆菌BgG-N abrB-30bp,所述重组枯草芽孢杆菌BgG-N abrB-30bp的构建方法公开于Tian R,Liu Y,Chen J,et al.Synthetic N-terminal coding sequences for fine-tuning geneexpression and metabolic engineering in Bacillus subtilis.Metab Eng.中。
本发明的第四个目的是提供含有所述双输出亚群调控回路的重组枯草芽孢杆菌。
本发明还要求保护所述双输出亚群调控回路或所述重组枯草芽孢杆菌在N-乙酰神经氨酸的生产中的应用。
有益效果:通过增加亚群调控回路稳定性双输出亚群调控回路,在双输出亚群调控回路中,存在两个传感器启动子Pveg105作为输出启动子,只有当两个Pveg105同时发生遗传突变,细胞亚群调控回路才会失效,这增加了亚群调控回路的稳定性。所得到的重组枯草芽孢杆菌可以在96h的连续传代发酵培养过程中一直维持NeuAc生产。
附图说明
图1为双输出亚群调控回路结构示意图。
图2为重组枯草芽孢杆菌NeuAc生产稳定性分析。
具体实施方式
重组枯草芽孢杆菌种子培养及发酵:
LB液体培养基配方为:10g/L胰蛋白胨,10g/L氯化钠,5g/L酵母粉。
发酵培养基配方为:40g/L葡萄糖,12g/L酵母粉,6g/L胰蛋白胨,6g/L硫酸铵,12g/L三水合磷酸氢二钾,2.5g/L磷酸二氢钾,3g/L硫酸镁,6g/L尿素。
发酵过程为:将培养在LB琼脂平板上的单菌落接种到LB液体培养基中,在37℃和220rpm下培养12h,制成种子液;将种子液以2%(v/v)的接种量和相同的初始OD600值转接到25mL发酵培养基(250mL摇瓶)中。在37℃、220rpm培养12h后获得发酵液,以2%(v/v)的接种量转接至装有25mL新鲜发酵培养基的250mL摇瓶,在相同条件下继续培养12h,再重复转接-培养7次。每次转接时,同时以2%(v/v)的接种量将发酵液接种于装有1.5mL新鲜发酵培养基的24孔深孔板,在37℃、220rpm培养48h后收集细胞,用于NeuAc生产分析。
样品检测方法:首先,将发酵液离心后取上清,加入两倍体积35mM稀硫酸去除胞外蛋白。之后,使用离心机在14000rpm离心10min后,用0.22μm滤膜过滤后,使用液相色谱column(300×7.8mm)有机酸柱,检测波长为210nm。流动相采用10mM稀硫酸,流速为0.5mL/min柱温为40℃。
实施例1双输出亚群调控质粒的构建
(1)以亚群调控回路1.1质粒(来源于公开号:CN112342234A)作为模板,以fp-1.1-9.8k-f和fp-1.1-9.8k-r为引物,pcr扩增线性化亚群调控回路1.1质粒;
fp-1.1-9.8k-f:cagctcaaaaaaactgtttatctgtaagctgcaaggcgattaagttgggta;
fp-1.1-9.8k-r:agcgtattacggagcacttcccatactttcgccagctggcgtaatag;
(2)以亚群调控回路1.3质粒(来源于公开号:CN112342234A)作为模板,以ftsW-1.6k-f和ftsW-1.6k-r为引物,pcr扩增获得包括Pveg105、RBS0、N端编码序列N1和必需基因ftsW的片段;
ftsW-1.6k-f:tatgggaagtgctccgtaatacgct;
tsW-1.6k-r:ttacagataaacagtttttttgagctgtttctttttcattcc;
将上述2个片段纯化回收,利用Gibson Assembly Clonging Kit(New EnglandBiolabs)进行连接,构建双输出亚群调控质粒,待平板上长出转化子后,通过菌落PCR和测序,确认其构建成功。
构建好的双输出亚群调控质粒含有整合有转录调控蛋白nanR结合序列的启动子Pveg105、RBS1和必需基因folB;含有阻遏蛋白lac I表达框;含有IPTG诱导型启动子Pgrac2、RBS0、转录调控蛋白nanR的编码基因;含有整合有转录调控蛋白nanR结合序列的启动子Pveg105,RBS0、N端编码序列N1和必需基因ftsW。所述IPTG诱导型启动子Pgrac2和RBS0调控转录调控蛋白nanR表达;所述启动子Pveg105和RBS1调控必需基因folB表达;所述启动子Pveg105和必须基因ftsW之间依次设置RBS0和N端编码序列N1,所述启动子Pveg105、RBS0和N端编码序列N1调控必需基因ftsW表达;所述folB与所述lac I表达框转录方向相对,和所述转录调控蛋白nanR转录方向相同;所述ftsW和所述转录调控蛋白nanR转录方向相对;folB和lacI表达框之间具有一个双向终止子,转录调控蛋白nanR的编码基因和必须基因ftsW之间具有一个双向终止子。
实施例2构建敲除基因组上必需基因拷贝的敲除框
1、构建fol敲除框
(1)利用引物qc-folB-1.2k-1f和qc-folB-1.2k-1r对野生型枯草芽孢杆菌(Bacillus subtilis)168进行菌落PCR,扩增获得fol1片段;
qc-folB-1.2k-1f:agctagaagctctcttgacagct;
qc-folB-1.2k-1r:gtttcctgtgtgaaattgttatccgctcttgcttaaatccagctcagcggt;
(2)以质粒P7Z6(如SEQ ID NO.12)为模板,以3p7s6-1.3f和3p7s6-1.3r为引物,PCR扩增获得fol2片段;
3p7s6-1.3f:gagcggataacaatttcacacaggaaac;
3p7s6-1.3r:taacgccagggttttcccagtc;
(3)以qc-folB-1.2k-3f和qc-folB-1.2k-3r为引物,对野生型枯草芽孢杆菌168进行菌落PCR,扩增获得fol3片段;
qc-folB-1.2k-3f:gactgggaaaaccctggcgttaaccttgagcaaacgatcaactatgct;
qc-folB-1.2k-3r:ctcccgcatcgcattttgtaatct;
(4)纯化fol1、fol2和fol3片段,最后通过融合pcr的方式,将三个片段融合后扩增,构建fol敲除框。
2、构建fts敲除框
fts敲除框的构建方法来源于刘延峰、堵国成、曹燕亭、王惠好、卢杨、刘龙、李江华、陈坚.一种调控N-乙酰神经氨酸产量提高的重组枯草芽孢杆菌.(公开号CN112342234A)
实施例3重组枯草芽孢杆菌NeuAc生产稳定性分析
先将细胞亚群调控回路1.1质粒转入枯草芽孢杆菌BgG-N abrB-30bp(BgG-NabrB-30bp构建方法公开于论文《Synthetic N-terminal coding sequences for fine-tuning gene expression and metabolic engineering in Bacillus subtilis》中,并在后续实验中命名为重组枯草芽孢杆菌No.1),然后利用实施例2构建获得的fol敲除框将其基因组上的必需基因folB拷贝敲除,构建重组枯草芽孢杆菌No.2;
先将细胞亚群调控回路1.3质粒转入重组枯草芽孢杆菌No.1,然后利用实施例2构建获得的ftsW敲除框将其基因组上的必需基因ftsW拷贝敲除,构建重组枯草芽孢杆菌No.3;
先将实施例1构建的双输出亚群调控回路质粒,转入重组枯草芽孢杆菌No.1,然后利用实施例2构建获得的fol敲除框和ftsW敲除框将其基因组上的必需基因folB和ftsW拷贝敲除,构建重组枯草芽孢杆菌No.4。
将细胞亚群调控回路1.1和细胞亚群调控回路1.3共同转化重组枯草芽孢杆菌No.1,发现菌株仅能单独表达一条细胞亚群调控回路。
随后进行发酵生产并分析这四株重组枯草芽孢杆菌的NeuAc生产稳定性。每隔12h进行转接发酵生产,并收取发酵液接种于24孔深孔板再培养48h后收集细胞NeuAc产量分析,结果如图2所示,重组枯草芽孢杆菌No.1在传代至第3次NeuAc产量逐渐下降,传代至第5次则停止生产;重组枯草芽孢杆菌No.2传代至第7次停止生产;而重组枯草芽孢杆菌No.4传代7次后仍能稳定生产NeuAc(第1次传代培养到第7次传代培养NeuAc产量稳定在0.65-0.90g/L)。
虽然本发明已以较佳实施例公开如上,但其并非用以限定本发明,任何熟悉此技术的人,在不脱离本发明的精神和范围内,都可做各种的改动与修饰,因此本发明的保护范围应该以权利要求书所界定的为准。
SEQUENCE LISTING
<110> 江南大学
<120> 一种N-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌
<130> BAA210184A
<160> 12
<170> PatentIn version 3.3
<210> 1
<211> 11297
<212> DNA
<213> 人工序列
<400> 1
tattggtatg actggtttta agcgcaaaaa aagttgcttt ttcgtaccta ttaatgtatc 60
gttttagaaa accgactgta aaaagtacag tcggcattat ctcatattat aaaagccagt 120
cattaggcct atctgacaat tcctgaatag agttcataaa caatcctgca tgataaccat 180
cacaaacaga atgatgtacc tgtaaagata gcggtaaata tattgaatta cctttattaa 240
tgaattttcc tgctgtaata atgggtagaa ggtaattact attattattg atatttaagt 300
taaacccagt aaatgaagtc catggaataa tagaaagaga aaaagcattt tcaggtatag 360
gtgttttggg aaacaatttc cccgaaccat tatatttctc tacatcagaa aggtataaat 420
cataaaactc tttgaagtca ttctttacag gagtccaaat accagagaat gttttagata 480
caccatcaaa aattgtataa agtggctcta acttatccca ataacctaac tctccgtcgc 540
tattgtaacc agttctaaaa gctgtatttg agtttatcac ccttgtcact aagaaaataa 600
atgcagggta aaatttatat ccttcttgtt ttatgtttcg gtataaaaca ctaatatcaa 660
tttctgtggt tatactaaaa gtcgtttgtt ggttcaaata atgattaaat atctcttttc 720
tcttccaatt gtctaaatca attttattaa agttcatttg atatgcctcc taaattttta 780
tctaaagtga atttaggagg cttacttgtc tgctttcttc attagaatca atcctttttt 840
aaaagtcaat attactgtaa cataaatata tattttaaaa atatcccact ttatccaatt 900
ttcgtttgtt gaactaatgg gtgctttagt tgaagaataa aagaccacat taaaaaatgt 960
ggtcttttgt gtttttttaa aggatttgag cgtagcgaaa aatccttttc tttcttatct 1020
tgataataag ggtaactatt gccgatcgtc cattccgaca gcatcgccag tcactatggc 1080
gtgctgctag cgccattcgc cattcaggct gcgcaactgt tgggaagggc gatcggtgcg 1140
ggcctcttcg ctattacgcc agctggcgaa agtatgggaa gtgctccgta atacgctgac 1200
aagagagaaa gggcttggag gtattgaaac aagaggagtt ctgagaattg gtatgcctta 1260
taagtccaat taacagttga aaacctgcat aggagagcta tgcgggtttt ttattttaca 1320
taatgataca taatttaccg aaacttgcgg aacataattg aggaatcata gaattttgtc 1380
aaaataattt tattgacaac gtcttattaa cgttgatata atttaaattt tatttgacaa 1440
aaatgggctc gtgttgtaca atggtataac aggtataaag gtatatcgtt taggaggcta 1500
gcctttgtta aagccattag gtgatcgcgt tgtcattgaa ctcgtagaat taaaaaaaat 1560
gctaaaatct tatgattact cactgatatt cgcaatcgtt ttattatgcg gattcggttt 1620
agtgatggta tacagctcaa gcatgattac ggctgtctcc cggtatggag taagcagtaa 1680
ttttttcttc atgcggcagc tgtttgcttt aattgcgggt ggcgctctat ttattctcat 1740
ggcgttgttt ccttataaag cactggccca tcaaaagttt cagaagggga tactgcttgt 1800
atctgttctt gcgcttatct cactgtttgt tttcgggcat gttgccggaa acgcgcagag 1860
ctggtttaaa atcggcggaa tgagtattca gccgggggag tttgtgaaac tggtcgtgat 1920
tttatacctt gcagccgtat atgcaaaaaa acaaagttat atcgaccatc tgttaacggg 1980
agtagcccct ccggtagtca tgacgcttat aatttgtggg ttaattgcca tgcagccaga 2040
tttcggtaca gccatgatta tagggttaat tgcgacgtgc atgatcttgt gctccggctt 2100
cagcggaaag acgctggtga ggcttgtgat actgggcgga attgttttca ttttagtcag 2160
ccctattatc tatttgaatc aggacaaaat tttaactgaa ggccgtttag cgcgttttga 2220
gagtcttgaa gacccattta agtatgcaaa ttcatcaggt ttgcaagtga tcaattctta 2280
ttatgcgatc agctcaggcg gcattttcgg cctggggctc ggtgaaagta tccaaaaata 2340
cggatatctg cctgaatcac acactgactt tattatggct gtcattgctg aagagctcgg 2400
catttttggg gtattgtttg tgattttctt attgggtttt gtcgtcataa aaggttttta 2460
tattgccaga aaatgcgagg acccgtttgg aagtcttctg gcgatcggca tttcaagcat 2520
gattgccatc cagtcgttta ttaaccttgg cggtgtcagc ggattaattc cgattacagg 2580
ggttacgctg ccatttatca gttacggggg ctcttctttg gtgctgctgc tggggagtat 2640
ggggatatta gcgaatatca gcatgtttgt gaaatattca gagaataaga aaaagaaaga 2700
gcccttggcg ccgaagggaa tgaaaaagaa acagctcaaa aaaactgttt atctgtaagc 2760
tgcaaggcga ttaagttggg taacgccagg gttttcccag tcacgacgtt gtaaaacgac 2820
ggccagtgaa ttcgagctca atgtcacaga acgcctgcgt tattgcgcag gcgttttgta 2880
ataaaaacac cccatacaga aagcttataa tgcgatctgc ttcactaaag tggcagggcg 2940
gagctcaggc cttaactcac attaattgcg ttgcgctcac tgcccgcttt ccagtcggga 3000
aacctgtcgt gccagctgca ttaatgaatc ggccaacgcg cggggagagg cggtttgcgt 3060
attgggcgcc agggtggttt ttcttttcac cagtgagacg ggcaacagct gattgccctt 3120
caccgcctgg ccctgagaga gttgcagcaa gcggtccacg ctggtttgcc ccagcaggcg 3180
aaaatcctgt ttgatggtgg ttaacggcgg gatataacat gagctgtctt cggtatcgtc 3240
gtatcccact accgagatat ccgcaccaac gcgcagcccg gactcggtaa tggcgcgcat 3300
tgcgcccagc gccatctgat cgttggcaac cagcatcgca gtgggaacga tgccctcatt 3360
cagcatttgc atggtttgtt gaaaaccgga catggcactc cagtcgcctt cccgttccgc 3420
tatcggctga atttgattgc gagtgagata tttatgccag ccagccagac gcagacgcgc 3480
cgagacagaa cttaatgggc ccgctaacag cgcgatttgc tggtgaccca atgcgaccag 3540
atgctccacg cccagtcgcg taccgtcttc atgggagaaa ataatactgt tgatgggtgt 3600
ctggtcagag acatcaagaa ataacgccgg aacattagtg caggcagctt ccacagcaat 3660
ggcatcctgg tcatccagcg gatagttaat gatcagccca ctgacgcgtt gcgcgagaag 3720
attgtgcacc gccgttttac aggcttcgac gccgcttcgt tctaccatcg acaccaccac 3780
gctggcaccc agttgatcgg cgcgagattt aatcgccgcg acaatttgcg acggcgcgtg 3840
cagggccaga ctggaggtgg caacgccaat cagcaacgac tgtttgcccg ccagttgttg 3900
tgccacgcgg ttgggaatgt aattcagctc cgccatcgcc gcttccactt tttcccgcgt 3960
tttcgcagaa acgtggctgg cctggttcac cacgcgggaa acggtctgat aagagacacc 4020
ggcatactct gcgacatcgt ataacgttac tggtttcatc aaaatcgtct ccctccgttt 4080
gaatatttga ttgatcgtaa ccagatgaag cactctttcc actatcccta cagtgttatg 4140
gcttgaacaa tcacgaaaca ataattggta cgtacgatct ttcagccgac tcaaacatca 4200
aatcttacaa atgtagtctt tgaaagtatt acatatgtaa gatttaaatg caaccgtttt 4260
ttcggaagga aatgatgacc tcgtttccac cggaattagc ttggtaccag ctattgtaac 4320
ataatcggta cgggggtgaa aaagctaacg gaaaagggag cggaaaagaa tgatgtaagc 4380
gtgaaaaatt ttttaaaaaa tctcttgaca ttggaaggga gatatgttat tataagaatt 4440
gcggaattgt gagcggataa caattcataa ttgtgagcgg ataacaattc aaccccaaag 4500
gaggtgaaat gtacacatgg gccttatgaa cgcatttgat tcgcaaaccg aagattcttc 4560
acctgcaatt ggtcgcaact tgcgtagccg cccgctggcg cgtaaaaaac tctccgaaat 4620
ggtggaagaa gagctggaac agatgatccg ccgtcgtgaa tttggcgaag gtgaacaatt 4680
accgtctgaa cgcgaactga tggcgttctt taacgtcggg cgtccttcgg tgcgtgaagc 4740
gctggcagcg ttaaaacgca aaggtctggt gcaaataaac aacggcgaac gcgctcgcgt 4800
ctcgcgtcct tctgcggaca ctatcatcgg tgagctttcc ggcatggcga aagatttcct 4860
ttctcatccc ggtgggattg cccatttcga acaattacgt ctgttctttg aatccagtct 4920
ggtgcgctat gcggctgaac atgccaccga tgagcaaatc gatttgctgg caaaagcact 4980
ggaaatcaac agtcagtcgc tggataacaa cgcggcattc attcgttcag acgttgattt 5040
ccaccgcgtg ctggcggaga tccccggtaa cccaatcttc atggcgatcc acgttgccct 5100
gctcgactgg cttattgccg cacgcccaac ggttaccgat caggcactgc acgaacataa 5160
caacgttagt tatcaacagc atattgcgat cgttgatgcg atccgccgtc atgatcctga 5220
cgaagccgat cgtgcgttgc aatcgcatct caacagcgtc tctgctacct ggcacgcttt 5280
cggtcagacc accaacaaaa agaaataatg ccactttagt gaagcagatc gcattataag 5340
ctttctgtat ggggtgtttt tattacaaaa cgcctgcgca ataacgcagg cgttctgtga 5400
catttctgca atagacactt ttccttcagc ctctgcaggt tttttctggc tccatcatga 5460
cttttttctc gtaatttcaa ttgctactga tttatagtgt ccgggaattg gcgggtctgg 5520
cttaatcact ttcaccgtac attgctgaac aggctgaaat tttccgagaa cagtgccagc 5580
aatacgttcc gccagcgttt ccaccaattt cacaggctcc ccttccacga tatctttaca 5640
tacgtgatag agctcagcat agttgatcgt ttgctcaagg tcgtctgtct gtccagcttt 5700
gcttaaatcc agctcagcgg ttaaatcgac tttaaaccgc tggccaagtt tgttttcttc 5760
tgtgaacaca ccgtgatatc cgtaaaactc cataccttct acataaactt tatccatagg 5820
ctagctctcc aaacgatata cctttatacc tgttatacca ttgtacaaca cgagcccatt 5880
tttgtcaaat aaaatttaaa ttatatcaac gttaataaga cgttgtcaat aaaattattt 5940
tgacaaaatt ctatgattcc tcaattatgt tccgcaagtt tcggtaaatt atgtatcatt 6000
atgtaaaata aaaaacccgc atagctctcc tatgcaggtt ttcaactgtt aattggactt 6060
ataaggcata ccaattctca gaactcctct tgtttcaata cctccaagcc ctttctctct 6120
tgtcagcgta ttacggagca cttcccataa tcacttgggg ttgacgaccg agtagttcac 6180
cggcacgaaa cttcacgtca cgcgtccatg gagatctttg tctgcaactg aaaagtttat 6240
accttacctg gaacaaatgg ttgaaacata cgaggctaat atcggcttat taggaatagt 6300
ccctgtacta ataaaatcag gtggatcagt tgatcagtat attttggacg aagctcggaa 6360
agaatttgga gatgacttgc ttaattccac aattaaatta agggaaagaa taaagcgatt 6420
tgatgttcaa ggaatcacgg aagaagatac tcatgataaa gaagctctaa aactattcaa 6480
taaccttaca atggaattga tcgaaagggt ggaaggttaa tggtacgaaa attaggggat 6540
ctacctagaa agccacaagg cgataggtca agcttaaaga acccttacat ggatcttaca 6600
gattctgaaa gtaaagaaac aacagaggtt aaacaaacag aaccaaaaag aaaaaaagca 6660
ttgttgaaaa caatgaaagt tgatgtttca atccataata agattaaatc gctgcacgaa 6720
attctggcag catccgaagg gaattcatat tacttagagg atactattga gagagctatt 6780
gataagatgg ttgagacatt acctgagagc caaaaaactt tttatgaata tgaattaaaa 6840
aaaagaacca acaaaggctg agacagactc caaacgagtc tgttttttta aaaaaaatat 6900
taggagcatt gaatatatat tagagaatta agaaagacat gggaataaaa atattttaaa 6960
tccagtaaaa atatgataag attatttcag aatatgaaga actctgtttg tttttgatga 7020
aaaaacaaac aaaaaaaatc cacctaacgg aatctcaatt taactaacag cggccaaact 7080
gagaagttaa atttgagaag gggaaaaggc ggatttatac ttgtatttaa ctatctccat 7140
tttaacattt tattaaaccc catacaagtg aaaatcctct tttacactgt tcctttaggt 7200
gatcgcggag ggacattatg agtgaagtaa acctaaaagg aaatacagat gaattagtgt 7260
attatcgaca gcaaaccact ggaaataaaa tcgccaggaa gagaatcaaa aaagggaaag 7320
aagaagttta ttatgttgct gaaacggaag agaagatatg gacagaagag caaataaaaa 7380
acttttcttt agacaaattt ggtacgcata taccttacat agaaggtcat tatacaatct 7440
taaataatta cttctttgat ttttggggct attttttagg tgctgaagga attgcgctct 7500
atgctcacct aactcgttat gcatacggca gcaaagactt ttgctttcct agtctacaaa 7560
caatcgctaa aaaaatggac aagactcctg ttacagttag aggctacttg aaactgcttg 7620
aaaggtacgg ttttatttgg aaggtaaacg tccgtaataa aaccaaggat aacacagagg 7680
aatccccgat ttttaagatt agacgtaagg ttcctttgct ttcagaagaa cttttaaatg 7740
gaaaccctaa tattgaaatt ccagatgacg aggaagcaca tgtaaagaag gctttaaaaa 7800
aggaaaaaga gggtcttcca aaggttttga aaaaagagca cgatgaattt gttaaaaaaa 7860
tgatggatga gtcagaaaca attaatattc cagaggcctt acaatatgac acaatgtatg 7920
aagatatact cagtaaagga gaaattcgaa aagaaatcaa aaaacaaata cctaatccta 7980
caacatcttt tgagagtata tcaatgacaa ctgaagagga aaaagtcgac agtactttaa 8040
aaagcgaaat gcaaaatcgt gtctctaagc cttcttttga tacctggttt aaaaacacta 8100
agatcaaaat tgaaaataaa aattgtttat tacttgtacc gagtgaattt gcatttgaat 8160
ggattaagaa aagatattta gaaacaatta aaacagtcct tgaagaagct ggatatgttt 8220
tcgaaaaaat cgaactaaga aaagtgcaat aaactgctga agtatttcag cagttttttt 8280
tatttagaaa tagtgaaaaa aatataatca gggaggtatc aatatttaat gagtactgat 8340
ttaaatttat ttagactgga attaataatt aacacgtaga ctaattaaaa tttaatgagg 8400
gataaagagg atacaaaaat attaatttca atccctatta aattttaaca agggggggat 8460
taaaatttaa ttagaggttt atccacaaga aaagacccta ataaaatttt tactagggtt 8520
ataacactga ttaatttctt aatgggggag ggattaaaat ttaatgacaa agaaaacaat 8580
cttttaagaa aagcttttaa aagataataa taaaaagagc tttgcgatta agcaaaactc 8640
tttacttttt cattgacatt atcaaattca tcgatttcaa attgttgttg tatcataaag 8700
ttaattctgt tttgcacaac cttttcagga atataaaaca catctgaggc ttgttttata 8760
aactcagggt cgctaaagtc aatgtaacgt agcatatgat atggtatagc ttccacccaa 8820
gttagccttt ctgcttcttc tgaatgtttt tcatatactt ccatgggtat ctctaaatga 8880
ttttcctcat gtagcaaggt atgagcaaaa agtttatgga attgatagtt cctctctttt 8940
tcttcaactt ttttatctaa aacaaacact ttaacatctg agtcaatgta agcataagat 9000
gtttttccag tcataatttc aatcccaaat cttttagaca gaaattctgg acgtaaatct 9060
tttggtgaaa gaattttttt atgtagcaat atatccgata cagcaccttc taaaagcgtt 9120
ggtgaatagg gcattttacc tatctcctct cattttgtgg aataaaaata gtcatattcg 9180
tccatctacc tatcctatta tcgaacagtt gaacttttta atcaaggatc agtccttttt 9240
ttcattattc ttaaactgtg ctcttaactt taacaactcg atttgttttt ccagatctcg 9300
agggtaacta gcctcgccga tcccgcaaga ggcccggcag tcaggtggca cttttcgggg 9360
aaatgtgcgc ggaaccccta tttgtttatt tttctaaata cattcaaata tgtatccgct 9420
catgagacaa taaccctgat aaatgcttca ataatattga aaaaggaaga gtatgagtat 9480
tcaacatttc cgtgtcgccc ttattccctt ttttgcggca ttttgccttc ctgtttttgc 9540
tcacccagaa acgctggtga aagtaaaaga tgctgaagat cagttgggtg cacgagtggg 9600
ttacatcgaa ctggatctca acagcggtaa gatccttgag agttttcgcc ccgaagaacg 9660
ttttccaatg atgagcactt ttaaagttct gctatgtggc gcggtattat cccgtattga 9720
cgccgggcaa gagcaactcg gtcgccgcat acactattct cagaatgact tggttgagta 9780
ctcaccagtc acagaaaagc atcttacgga tggcatgaca gtaagagaat tatgcagtgc 9840
tgccataacc atgagtgata acactgcggc caacttactt ctgacaacga tcggaggacc 9900
gaaggagcta accgcttttt tgcacaacat gggggatcat gtaactcgcc ttgatcgttg 9960
ggaaccggag ctgaatgaag ccataccaaa cgacgagcgt gacaccacga tgcctgtagc 10020
aatggcaaca acgttgcgca aactattaac tggcgaacta cttactctag cttcccggca 10080
acaattaata gactggatgg aggcggataa agttgcagga ccacttctgc gctcggccct 10140
tccggctggc tggtttattg ctgataaatc tggagccggt gagcgtgggt ctcgcggtat 10200
cattgcagca ctggggccag atggtaagcc ctcccgtatc gtagttatct acacgacggg 10260
gagtcaggca actatggatg aacgaaatag acagatcgct gagataggtg cctcactgat 10320
taagcattgg taactgtcag accaagttta ctcatatata ctttagattg atttaaaact 10380
tcatttttaa tttaaaagga tctaggtgaa gatccttttt gataatctca tgaccaaaat 10440
cccttaacgt gagttttcgt tccactgagc gtcagacccc gtagaaaaga tcaaaggatc 10500
ttcttgagat cctttttttc tgcgcgtaat ctgctgcttg caaacaaaaa aaccaccgct 10560
accagcggtg gtttgtttgc cggatcaaga gctaccaact ctttttccga aggtaactgg 10620
cttcagcaga gcgcagatac caaatactgt ccttctagtg tagccgtagt taggccacca 10680
cttcaagaac tctgtagcac cgcctacata cctcgctctg ctaatcctgt taccagtggc 10740
tgctgccagt ggcgataagt cgtgtcttac cgggttggac tcaagacgat agttaccgga 10800
taaggcgcag cggtcgggct gaacgggggg ttcgtgcaca cagcccagct tggagcgaac 10860
gacctacacc gaactgagat acctacagcg tgagctatga gaaagcgcca cgcttcccga 10920
agggagaaag gcggacaggt atccggtaag cggcagggtc ggaacaggag agcgcacgag 10980
ggagcttcca gggggaaacg cctggtatct ttatagtcct gtcgggtttc gccacctctg 11040
acttgagcgt cgatttttgt gatgctcgtc aggggggcgg agcctatgga aaaacgccag 11100
caacgcggcc tttttacggt tcctggcctt ttgctggcct tttgctcaca tgttctttcc 11160
tgcgttatcc cctgattctg tggataaccg tattaccgcc tttgagtgag ctgataccgc 11220
tcgccgcagc cgaacgaccg agcgcagcga gtcagtgagc gaggaagcgg aagagcgccc 11280
aatacgcatg cttaagt 11297
<210> 2
<211> 154
<212> DNA
<213> 人工序列
<400> 2
gaaaagaatg atgtaagcgt gaaaaatttt ttaaaaaatc tcttgacatt ggaagggaga 60
tatgttatta taagaattgc ggaattgtga gcggataaca attcataatt gtgagcggat 120
aacaattcaa ccccaaagga ggtgaaatgt acac 154
<210> 3
<211> 1523
<212> DNA
<213> 人工序列
<400> 3
cgctcccttt tccgttagct ttttcacccc cgtaccgatt atgttacaat agctggtacc 60
aagctaattc cggtggaaac gaggtcatca tttccttccg aaaaaacggt tgcatttaaa 120
tcttacatat gtaatacttt caaagactac atttgtaaga tttgatgttt gagtcggctg 180
aaagatcgta cgtaccaatt attgtttcgt gattgttcaa gccataacac tgtagggata 240
gtggaaagag tgcttcatct ggttacgatc aatcaaatat tcaaacggag ggagacgatt 300
ttgatgaaac cagtaacgtt atacgatgtc gcagagtatg ccggtgtctc ttatcagacc 360
gtttcccgcg tggtgaacca ggccagccac gtttctgcga aaacgcggga aaaagtggaa 420
gcggcgatgg cggagctgaa ttacattccc aaccgcgtgg cacaacaact ggcgggcaaa 480
cagtcgttgc tgattggcgt tgccacctcc agtctggccc tgcacgcgcc gtcgcaaatt 540
gtcgcggcga ttaaatctcg cgccgatcaa ctgggtgcca gcgtggtggt gtcgatggta 600
gaacgaagcg gcgtcgaagc ctgtaaaacg gcggtgcaca atcttctcgc gcaacgcgtc 660
agtgggctga tcattaacta tccgctggat gaccaggatg ccattgctgt ggaagctgcc 720
tgcactaatg ttccggcgtt atttcttgat gtctctgacc agacacccat caacagtatt 780
attttctccc atgaagacgg tacgcgactg ggcgtggagc atctggtcgc attgggtcac 840
cagcaaatcg cgctgttagc gggcccatta agttctgtct cggcgcgtct gcgtctggct 900
ggctggcata aatatctcac tcgcaatcaa attcagccga tagcggaacg ggaaggcgac 960
tggagtgcca tgtccggttt tcaacaaacc atgcaaatgc tgaatgaggg catcgttccc 1020
actgcgatgc tggttgccaa cgatcagatg gcgctgggcg caatgcgcgc cattaccgag 1080
tccgggctgc gcgttggtgc ggatatctcg gtagtgggat acgacgatac cgaagacagc 1140
tcatgttata tcccgccgtt aaccaccatc aaacaggatt ttcgcctgct ggggcaaacc 1200
agcgtggacc gcttgctgca actctctcag ggccaggcgg tgaagggcaa tcagctgttg 1260
cccgtctcac tggtgaaaag aaaaaccacc ctggcgccca atacgcaaac cgcctctccc 1320
cgcgcgttgg ccgattcatt aatgcagctg gcacgacagg tttcccgact ggaaagcggg 1380
cagtgagcgc aacgcaatta atgtgagtta aggcctgagc tccgccctgc cactttagtg 1440
aagcagatcg cattataagc tttctgtatg gggtgttttt attacaaaac gcctgcgcaa 1500
taacgcaggc gttctgtgac att 1523
<210> 4
<211> 20
<212> DNA
<213> 人工序列
<400> 4
aaaggaggtg aaatgtacac 20
<210> 5
<211> 792
<212> DNA
<213> 人工序列
<400> 5
atgggcctta tgaacgcatt tgattcgcaa accgaagatt cttcacctgc aattggtcgc 60
aacttgcgta gccgcccgct ggcgcgtaaa aaactctccg aaatggtgga agaagagctg 120
gaacagatga tccgccgtcg tgaatttggc gaaggtgaac aattaccgtc tgaacgcgaa 180
ctgatggcgt tctttaacgt cgggcgtcct tcggtgcgtg aagcgctggc agcgttaaaa 240
cgcaaaggtc tggtgcaaat aaacaacggc gaacgcgctc gcgtctcgcg tccttctgcg 300
gacactatca tcggtgagct ttccggcatg gcgaaagatt tcctttctca tcccggtggg 360
attgcccatt tcgaacaatt acgtctgttc tttgaatcca gtctggtgcg ctatgcggct 420
gaacatgcca ccgatgagca aatcgatttg ctggcaaaag cactggaaat caacagtcag 480
tcgctggata acaacgcggc attcattcgt tcagacgttg atttccaccg cgtgctggcg 540
gagatccccg gtaacccaat cttcatggcg atccacgttg ccctgctcga ctggcttatt 600
gccgcacgcc caacggttac cgatcaggca ctgcacgaac ataacaacgt tagttatcaa 660
cagcatattg cgatcgttga tgcgatccgc cgtcatgatc ctgacgaagc cgatcgtgcg 720
ttgcaatcgc atctcaacag cgtctctgct acctggcacg ctttcggtca gaccaccaac 780
aaaaagaaat aa 792
<210> 6
<211> 263
<212> PRT
<213> 人工序列
<400> 6
Met Gly Leu Met Asn Ala Phe Asp Ser Gln Thr Glu Asp Ser Ser Pro
1 5 10 15
Ala Ile Gly Arg Asn Leu Arg Ser Arg Pro Leu Ala Arg Lys Lys Leu
20 25 30
Ser Glu Met Val Glu Glu Glu Leu Glu Gln Met Ile Arg Arg Arg Glu
35 40 45
Phe Gly Glu Gly Glu Gln Leu Pro Ser Glu Arg Glu Leu Met Ala Phe
50 55 60
Phe Asn Val Gly Arg Pro Ser Val Arg Glu Ala Leu Ala Ala Leu Lys
65 70 75 80
Arg Lys Gly Leu Val Gln Ile Asn Asn Gly Glu Arg Ala Arg Val Ser
85 90 95
Arg Pro Ser Ala Asp Thr Ile Ile Gly Glu Leu Ser Gly Met Ala Lys
100 105 110
Asp Phe Leu Ser His Pro Gly Gly Ile Ala His Phe Glu Gln Leu Arg
115 120 125
Leu Phe Phe Glu Ser Ser Leu Val Arg Tyr Ala Ala Glu His Ala Thr
130 135 140
Asp Glu Gln Ile Asp Leu Leu Ala Lys Ala Leu Glu Ile Asn Ser Gln
145 150 155 160
Ser Leu Asp Asn Asn Ala Ala Phe Ile Arg Ser Asp Val Asp Phe His
165 170 175
Arg Val Leu Ala Glu Ile Pro Gly Asn Pro Ile Phe Met Ala Ile His
180 185 190
Val Ala Leu Leu Asp Trp Leu Ile Ala Ala Arg Pro Thr Val Thr Asp
195 200 205
Gln Ala Leu His Glu His Asn Asn Val Ser Tyr Gln Gln His Ile Ala
210 215 220
Ile Val Asp Ala Ile Arg Arg His Asp Pro Asp Glu Ala Asp Arg Ala
225 230 235 240
Leu Gln Ser His Leu Asn Ser Val Ser Ala Thr Trp His Ala Phe Gly
245 250 255
Gln Thr Thr Asn Lys Lys Lys
260
<210> 7
<211> 319
<212> DNA
<213> 人工序列
<400> 7
tatgggaagt gctccgtaat acgctgacaa gagagaaagg gcttggaggt attgaaacaa 60
gaggagttct gagaattggt atgccttata agtccaatta acagttgaaa acctgcatag 120
gagagctatg cgggtttttt attttacata atgatacata atttaccgaa acttgcggaa 180
cataattgag gaatcataga attttgtcaa aataatttta ttgacaacgt cttattaacg 240
ttgatataat ttaaatttta tttgacaaaa atgggctcgt gttgtacaat ggtataacag 300
gtataaaggt atatcgttt 319
<210> 8
<211> 13
<212> DNA
<213> 人工序列
<400> 8
ggagagctag cct 13
<210> 9
<211> 360
<212> DNA
<213> 人工序列
<400> 9
atggataaag tttatgtaga aggtatggag ttttacggat atcacggtgt gttcacagaa 60
gaaaacaaac ttggccagcg gtttaaagtc gatttaaccg ctgagctgga tttaagcaaa 120
gctggacaga cagacgacct tgagcaaacg atcaactatg ctgagctcta tcacgtatgt 180
aaagatatcg tggaagggga gcctgtgaaa ttggtggaaa cgctggcgga acgtattgct 240
ggcactgttc tcggaaaatt tcagcctgtt cagcaatgta cggtgaaagt gattaagcca 300
gacccgccaa ttcccggaca ctataaatca gtagcaattg aaattacgag aaaaaagtca 360
<210> 10
<211> 1212
<212> DNA
<213> 人工序列
<400> 10
atgttaaaaa aaatgctaaa atcttatgat tactcactga tattcgcaat cgttttatta 60
tgcggattcg gtttagtgat ggtatacagc tcaagcatga ttacggctgt ctcccggtat 120
ggagtaagca gtaatttttt cttcatgcgg cagctgtttg ctttaattgc gggtggcgct 180
ctatttattc tcatggcgtt gtttccttat aaagcactgg cccatcaaaa gtttcagaag 240
gggatactgc ttgtatctgt tcttgcgctt atctcactgt ttgttttcgg gcatgttgcc 300
ggaaacgcgc agagctggtt taaaatcggc ggaatgagta ttcagccggg ggagtttgtg 360
aaactggtcg tgattttata ccttgcagcc gtatatgcaa aaaaacaaag ttatatcgac 420
catctgttaa cgggagtagc ccctccggta gtcatgacgc ttataatttg tgggttaatt 480
gccatgcagc cagatttcgg tacagccatg attatagggt taattgcgac gtgcatgatc 540
ttgtgctccg gcttcagcgg aaagacgctg gtgaggcttg tgatactggg cggaattgtt 600
ttcattttag tcagccctat tatctatttg aatcaggaca aaattttaac tgaaggccgt 660
ttagcgcgtt ttgagagtct tgaagaccca tttaagtatg caaattcatc aggtttgcaa 720
gtgatcaatt cttattatgc gatcagctca ggcggcattt tcggcctggg gctcggtgaa 780
agtatccaaa aatacggata tctgcctgaa tcacacactg actttattat ggctgtcatt 840
gctgaagagc tcggcatttt tggggtattg tttgtgattt tcttattggg ttttgtcgtc 900
ataaaaggtt tttatattgc cagaaaatgc gaggacccgt ttggaagtct tctggcgatc 960
ggcatttcaa gcatgattgc catccagtcg tttattaacc ttggcggtgt cagcggatta 1020
attccgatta caggggttac gctgccattt atcagttacg ggggctcttc tttggtgctg 1080
ctgctgggga gtatggggat attagcgaat atcagcatgt ttgtgaaata ttcagagaat 1140
aagaaaaaga aagagccctt ggcgccgaag ggaatgaaaa agaaacagct caaaaaaact 1200
gtttatctgt aa 1212
<210> 11
<211> 45
<212> DNA
<213> 人工序列
<400> 11
ttgttaaagc cattaggtga tcgcgttgtc attgaactcg tagaa 45
<210> 12
<211> 3189
<212> DNA
<213> 人工序列
<400> 12
gacgaaaggg cctcgtgata cgcctatttt tataggttaa tgtcatgata ataatggttt 60
cttagacgtc aggtggcact tttcggggaa atgtgcgcgg aacccctatt tgtttatttt 120
tctaaataca ttcaaatatg tatccgctca tgagacaata accctgataa atgcttcaat 180
aatattgaaa aaggaagagt atgagtattc aacatttccg tgtcgccctt attccctttt 240
ttgcggcatt ttgccttcct gtttttgctc acccagaaac gctggtgaaa gtaaaagatg 300
ctgaagatca gttgggtgca cgagtgggtt acatcgaact ggatctcaac agcggtaaga 360
tccttgagag ttttcgcccc gaagaacgtt ttccaatgat gagcactttt aaagttctgc 420
tatgtggcgc ggtattatcc cgtattgacg ccgggcaaga gcaactcggt cgccgcatac 480
actattctca gaatgacttg gttgagtact caccagtcac agaaaagcat cttacggatg 540
gcatgacagt aagagaatta tgcagtgctg ccataaccat gagtgataac actgcggcca 600
acttacttct gacaacgatc ggaggaccga aggagctaac cgcttttttg cacaacatgg 660
gggatcatgt aactcgcctt gatcgttggg aaccggagct gaatgaagcc ataccaaacg 720
acgagcgtga caccacgatg cctgtagcaa tggcaacaac gttgcgcaaa ctattaactg 780
gcgaactact tactctagct tcccggcaac aattaataga ctggatggag gcggataaag 840
ttgcaggacc acttctgcgc tcggcccttc cggctggctg gtttattgct gataaatctg 900
gagccggtga gcgtgggtct cgcggtatca ttgcagcact ggggccagat ggtaagccct 960
cccgtatcgt agttatctac acgacgggga gtcaggcaac tatggatgaa cgaaatagac 1020
agatcgctga gataggtgcc tcactgatta agcattggta actgtcagac caagtttact 1080
catatatact ttagattgat ttaaaacttc atttttaatt taaaaggatc taggtgaaga 1140
tcctttttga taatctcatg accaaaatcc cttaacgtga gttttcgttc cactgagcgt 1200
cagaccccgt agaaaagatc aaaggatctt cttgagatcc tttttttctg cgcgtaatct 1260
gctgcttgca aacaaaaaaa ccaccgctac cagcggtggt ttgtttgccg gatcaagagc 1320
taccaactct ttttccgaag gtaactggct tcagcagagc gcagatacca aatactgttc 1380
ttctagtgta gccgtagtta ggccaccact tcaagaactc tgtagcaccg cctacatacc 1440
tcgctctgct aatcctgtta ccagtggctg ctgccagtgg cgataagtcg tgtcttaccg 1500
ggttggactc aagacgatag ttaccggata aggcgcagcg gtcgggctga acggggggtt 1560
cgtgcacaca gcccagcttg gagcgaacga cctacaccga actgagatac ctacagcgtg 1620
agctatgaga aagcgccacg cttcccgaag ggagaaaggc ggacaggtat ccggtaagcg 1680
gcagggtcgg aacaggagag cgcacgaggg agcttccagg gggaaacgcc tggtatcttt 1740
atagtcctgt cgggtttcgc cacctctgac ttgagcgtcg atttttgtga tgctcgtcag 1800
gggggcggag cctatggaaa aacgccagca acgcggcctt tttacggttc ctggcctttt 1860
gctggccttt tgctcacatg ttctttcctg cgttatcccc tgattctgtg gataaccgta 1920
ttaccgcctt tgagtgagct gataccgctc gccgcagccg aacgaccgag cgcagcgagt 1980
cagtgagcga ggaagcggaa gagcgcccaa tacgcaaacc gcctctcccc gcgcgttggc 2040
cgattcatta atgcagctgg cacgacaggt ttcccgactg gaaagcgggc agtgagcgca 2100
acgcaattaa tgtgagttag ctcactcatt aggcacccca ggctttacac tttatgcttc 2160
cggctcgtat gttgtgtgga attgtgagcg gataacaatt tcacacagga aacagctatg 2220
accatgatta cgaattcgag ctcggtaccc ggggatcctc tagagatacc gttcgtatag 2280
catacattat acgaagttat cttgatatgg ctttttatat gtgttactct acatacagaa 2340
aggaggaact aaacatggcc aagttgacca gtgccgttcc ggtgctcacc gcgcgcgacg 2400
tcgccggagc ggtcgagttc tggaccgacc ggctcgggtt ctcccgggac ttcgtggagg 2460
acgacttcgc cggtgtggtc cgggacgacg tgaccctgtt catcagcgcg gtccaggacc 2520
aggtggtgcc ggacaacacc ctggcctggg tgtgggtgcg cggcctggac gagctgtacg 2580
ccgagtggtc ggaggtcgtg tccacgaact tccgggacgc ctccgggccg gccatgaccg 2640
agatcggcga gcagccgtgg gggcgggagt tcgccctgcg cgacccggcc ggcaactgcg 2700
tgcacttcgt ggccgaggag caggactgaa taacttcgta tagcatacat tatacgaacg 2760
gtaaatcgtc gacctgcagg catgcaagct tggcactggc cgtcgtttta caacgtcgtg 2820
actgggaaaa ccctggcgtt acccaactta atcgccttgc agcacatccc cctttcgcca 2880
gctggcgtaa tagcgaagag gcccgcaccg atcgcccttc ccaacagttg cgcagcctga 2940
atggcgaatg gcgcctgatg cggtattttc tccttacgca tctgtgcggt atttcacacc 3000
gcatatggtg cactctcagt acaatctgct ctgatgccgc atagttaagc cagccccgac 3060
acccgccaac acccgctgac gcgccctgac gggcttgtct gctcccggca tccgcttaca 3120
gacaagctgt gaccgtctcc gggagctgca tgtgtcagag gttttcaccg tcatcaccga 3180
aacgcgcga 3189
Claims (10)
1.一种双输出亚群调控回路,其特征在于,是包含第一必需基因调控模块和第二必需基因调控模块的质粒;所述必需基因包括但不限于二氢蝶呤醛缩酶基因folB、SEDS家族肽聚糖糖基转移酶基因ftsW;
所述第一必需基因调控模块包括:启动子Pveg105、RBS1、第一必需基因和阻遏蛋白lac I表达框;
所述第二必需基因调控模块包括:启动子Pveg105、RBS0、N端编码序列N1、第二必需基因、IPTG诱导型启动子Pgrac2、转录调控蛋白nanR的编码基因。
2.根据权利要求1所述的双输出亚群调控回路,其特征在于,所述质粒上还含有抗生素基因;包括但不限于氯霉素抗性基因CmR、氨苄青霉素抗性基因AmpR。
3.根据权利要求1所述的双输出亚群调控回路,其特征在于,所述第一必需基因调控模块中,启动子Pveg105和RBS1调控第一必需基因表达;
所述第二必需基因调控模块中,启动子Pveg105、RBS0和N端编码序列N1调控第二必需基因表达;所述IPTG诱导型启动子Pgrac2和RBS0调控转录调控蛋白nanR表达;
所述第一必需基因与lac I表达框转录方向相对,第二必需基因和转录调控蛋白nanR转录方向相对;所述第一必需基因和lac I表达框之间具有一个双向终止子,转录调控蛋白nanR的编码基因和第二必需基因之间具有一个双向终止子。
4.根据权利要求1所述的双输出亚群调控回路,其特征在于,必需基因folB的核苷酸序列如SEQ ID NO.9所示;必需基因ftsW的核苷酸序列如SEQ ID NO.10所示;必需基因ftsW的N端序列N1如SEQ ID NO.11所示。
5.根据权利要求1~4任一所述的双输出亚群调控回路,其特征在于,是以pHT01为载体骨架。
6.一种构建双输出细胞亚群调控回路的方法,其特征在于,以细胞亚群调控回路1.1为模板,获得线性化亚群调控回路1.1;以细胞亚群调控回路1.3为模板,获得包括Pveg105、RBS0、N端编码序列N1和必需基因ftsW的线性片段;将两个片段连接获得双输出细胞亚群调控回路。
7.一种提高枯草芽孢杆菌生产N-乙酰神经氨酸生产稳定性的方法,其特征在于,将权利要求1~5任一所述的双输出细胞亚群调控回路先转化至枯草芽孢杆菌细胞中,再缺失位于枯草芽孢杆菌基因组的必需基因folB和ftsW。
8.根据权利要求7所述的方法,其特征在于,所述枯草芽孢杆菌为枯草芽孢杆菌(Bacillus subtilis)BgG-N abrB-30bp。
9.含有权利要求1~5任一所述双输出细胞亚群调控回路的重组枯草芽孢杆菌。
10.权利要求1~5任一所述细胞亚群调控回路或权利要求9所述的重组枯草芽孢杆菌在N-乙酰神经氨酸的生产中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110219450.XA CN112961879A (zh) | 2021-02-26 | 2021-02-26 | 一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110219450.XA CN112961879A (zh) | 2021-02-26 | 2021-02-26 | 一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112961879A true CN112961879A (zh) | 2021-06-15 |
Family
ID=76275857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110219450.XA Pending CN112961879A (zh) | 2021-02-26 | 2021-02-26 | 一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112961879A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114591881A (zh) * | 2022-03-17 | 2022-06-07 | 山东润德生物科技有限公司 | 一种分泌几丁二糖脱乙酰酶的枯草芽孢杆菌及其应用 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104838000A (zh) * | 2012-07-27 | 2015-08-12 | 希望之城 | 一种递送ul128复合体和预防cmv感染的mva疫苗 |
CN106929461A (zh) * | 2017-04-25 | 2017-07-07 | 江南大学 | 一种提高n‑乙酰神经氨酸产量的重组枯草芽孢杆菌 |
CN110093366A (zh) * | 2019-05-05 | 2019-08-06 | 江南大学 | 一种枯草芽孢杆菌葡萄糖酸盐诱导表达元件及构建方法 |
CN112342234A (zh) * | 2020-10-27 | 2021-02-09 | 江南大学 | 一种调控n-乙酰神经氨酸产量提高的重组枯草芽孢杆菌 |
-
2021
- 2021-02-26 CN CN202110219450.XA patent/CN112961879A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104838000A (zh) * | 2012-07-27 | 2015-08-12 | 希望之城 | 一种递送ul128复合体和预防cmv感染的mva疫苗 |
CN106929461A (zh) * | 2017-04-25 | 2017-07-07 | 江南大学 | 一种提高n‑乙酰神经氨酸产量的重组枯草芽孢杆菌 |
CN110093366A (zh) * | 2019-05-05 | 2019-08-06 | 江南大学 | 一种枯草芽孢杆菌葡萄糖酸盐诱导表达元件及构建方法 |
CN112342234A (zh) * | 2020-10-27 | 2021-02-09 | 江南大学 | 一种调控n-乙酰神经氨酸产量提高的重组枯草芽孢杆菌 |
Non-Patent Citations (3)
Title |
---|
ELIZABETH M. MCNALLY等: "Coexpression and assembly of myosin heavy chain and myosin light chain in Escherichia coli", 《PROC. NATL. ACAD. SCI.》 * |
KYUNG-JIN KIM等: "Two-promoter vector is highly efficient for overproduction of protein complexes", 《PROTEIN SCIENCE》 * |
田聪慧等: "基于IRES序列的多基因共表达载体构建", 《中国生物工程杂志》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114591881A (zh) * | 2022-03-17 | 2022-06-07 | 山东润德生物科技有限公司 | 一种分泌几丁二糖脱乙酰酶的枯草芽孢杆菌及其应用 |
CN114591881B (zh) * | 2022-03-17 | 2023-07-21 | 山东润德生物科技有限公司 | 一种分泌几丁二糖脱乙酰酶的枯草芽孢杆菌及其应用 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101449587B1 (ko) | 장기 지속형 약물 제형 | |
CN108949721B (zh) | 表达磷脂酶d的重组菌株及应用 | |
US20030024009A1 (en) | Manipulation of the phenolic acid content and digestibility of plant cell walls by targeted expression of genes encoding cell wall degrading enzymes | |
CN113684141B (zh) | 一种胞外转运维生素d3前体角鲨烯的酿酒酵母菌株构建及其应用 | |
CN108753824A (zh) | 用于治疗视网膜营养不良的病毒载体 | |
KR101591887B1 (ko) | 장기 지속형 약물 제형 | |
KR20230062873A (ko) | 염기 편집 효소 | |
KR20210151916A (ko) | 뒤시엔느 근육 이영양증의 치료를 위한 aav 벡터-매개된 큰 돌연변이 핫스팟의 결실 | |
KR20220031642A (ko) | 인공 항원-특이적 면역조절 T (airT) 세포 | |
CN112961879A (zh) | 一种n-乙酰神经氨酸生产稳定性提高的重组枯草芽孢杆菌 | |
CN112941038A (zh) | 基于水疱性口炎病毒载体的重组新型冠状病毒及其制备方法与应用 | |
KR101970428B1 (ko) | 재조합 볼거리 바이러스 제릴린2계 백신 | |
KR20210136416A (ko) | 뮤코닉산 전구체 생산용 미생물 및 이를 이용한 뮤코닉산 전구체 생산방법 | |
CN112063669A (zh) | 酶法反应组合物、增加酶法反应中三磷酸腺苷(atp)量的方法及其应用 | |
CN112501101A (zh) | 天然除草剂thaxtomins的高产菌株及其制备方法和用途 | |
AU780854B2 (en) | Hormone-hormone receptor complexes and nucleic acid constructs and their use in gene therapy | |
CN114214354A (zh) | 一种双载体表达体系及其构建方法与应用 | |
US6465715B1 (en) | Expression of DNA or proteins in C. elegans | |
CN113372440B (zh) | 一种识别EB病毒gH糖蛋白的单克隆抗体及其应用 | |
CN114507664B (zh) | 合成启动子及其构建方法和应用 | |
US20030166258A1 (en) | Saccharomyces cerevisiae yeast strain with functional expression of a glut transporter | |
CN112342234B (zh) | 一种调控n-乙酰神经氨酸产量提高的重组枯草芽孢杆菌 | |
US20030059870A1 (en) | Recombinant bacterial strains for the production of natural nucleosides and modified analogues thereof | |
KR101030547B1 (ko) | 플라스미드 셔틀 벡터 | |
TWI338044B (en) | Saccharomyces cerevisiae yeast strain with functional expression of a glut transporter |
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 | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210615 |