CN114888054B - 一种多功能过氧化物酶在聚乙烯降解中的应用 - Google Patents
一种多功能过氧化物酶在聚乙烯降解中的应用 Download PDFInfo
- Publication number
- CN114888054B CN114888054B CN202210692907.3A CN202210692907A CN114888054B CN 114888054 B CN114888054 B CN 114888054B CN 202210692907 A CN202210692907 A CN 202210692907A CN 114888054 B CN114888054 B CN 114888054B
- Authority
- CN
- China
- Prior art keywords
- multifunctional
- peroxidase
- polyethylene
- reaction
- uvpe
- 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.)
- Active
Links
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 74
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 74
- 108040007629 peroxidase activity proteins Proteins 0.000 title claims abstract description 71
- 102000003992 Peroxidases Human genes 0.000 title claims abstract description 70
- -1 polyethylene Polymers 0.000 title claims abstract description 63
- 230000015556 catabolic process Effects 0.000 title claims abstract description 19
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 229920003023 plastic Polymers 0.000 claims abstract description 42
- 239000004033 plastic Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000000593 degrading effect Effects 0.000 claims abstract description 15
- 239000000872 buffer Substances 0.000 claims description 16
- 108090000623 proteins and genes Proteins 0.000 claims description 16
- 241000588724 Escherichia coli Species 0.000 claims description 13
- 239000013612 plasmid Substances 0.000 claims description 11
- 238000000855 fermentation Methods 0.000 claims description 6
- 230000004151 fermentation Effects 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- 238000006047 enzymatic hydrolysis reaction Methods 0.000 claims description 4
- 239000001394 sodium malate Substances 0.000 claims description 4
- 230000000813 microbial effect Effects 0.000 claims description 3
- 239000002773 nucleotide Substances 0.000 claims description 3
- 125000003729 nucleotide group Chemical group 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000013598 vector Substances 0.000 claims description 3
- 230000007071 enzymatic hydrolysis Effects 0.000 claims description 2
- 125000003275 alpha amino acid group Chemical group 0.000 claims 3
- 102000004190 Enzymes Human genes 0.000 abstract description 47
- 108090000790 Enzymes Proteins 0.000 abstract description 47
- 150000001299 aldehydes Chemical class 0.000 abstract description 11
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 abstract description 11
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 abstract description 10
- 150000002576 ketones Chemical class 0.000 abstract description 10
- 239000001630 malic acid Substances 0.000 abstract description 10
- 235000011090 malic acid Nutrition 0.000 abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 9
- 244000252132 Pleurotus eryngii Species 0.000 abstract description 7
- 235000001681 Pleurotus eryngii Nutrition 0.000 abstract description 7
- 239000007853 buffer solution Substances 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 238000006065 biodegradation reaction Methods 0.000 abstract description 3
- 238000005530 etching Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 41
- 239000000047 product Substances 0.000 description 23
- 239000000243 solution Substances 0.000 description 13
- 238000001514 detection method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000011572 manganese Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 102000004169 proteins and genes Human genes 0.000 description 7
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 238000004153 renaturation Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- VHJLVAABSRFDPM-QWWZWVQMSA-N dithiothreitol Chemical compound SC[C@@H](O)[C@H](O)CS VHJLVAABSRFDPM-QWWZWVQMSA-N 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- FXHGMKSSBGDXIY-UHFFFAOYSA-N heptanal Chemical compound CCCCCCC=O FXHGMKSSBGDXIY-UHFFFAOYSA-N 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- GYHFUZHODSMOHU-UHFFFAOYSA-N nonanal Chemical compound CCCCCCCCC=O GYHFUZHODSMOHU-UHFFFAOYSA-N 0.000 description 4
- NUJGJRNETVAIRJ-UHFFFAOYSA-N octanal Chemical compound CCCCCCCC=O NUJGJRNETVAIRJ-UHFFFAOYSA-N 0.000 description 4
- 239000013502 plastic waste Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 108010053070 Glutathione Disulfide Proteins 0.000 description 3
- GGAPHLIUUTVYMX-QWRGUYRKSA-N Gly-Phe-Ser Chemical compound OC[C@@H](C([O-])=O)NC(=O)[C@@H](NC(=O)C[NH3+])CC1=CC=CC=C1 GGAPHLIUUTVYMX-QWRGUYRKSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000001888 Peptone Substances 0.000 description 3
- 108010080698 Peptones Proteins 0.000 description 3
- 108700020962 Peroxidase Proteins 0.000 description 3
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000007857 degradation product Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 3
- 230000036425 denaturation Effects 0.000 description 3
- 239000012470 diluted sample Substances 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- YPZRWBKMTBYPTK-BJDJZHNGSA-N glutathione disulfide Chemical compound OC(=O)[C@@H](N)CCC(=O)N[C@H](C(=O)NCC(O)=O)CSSC[C@@H](C(=O)NCC(O)=O)NC(=O)CC[C@H](N)C(O)=O YPZRWBKMTBYPTK-BJDJZHNGSA-N 0.000 description 3
- 235000011187 glycerol Nutrition 0.000 description 3
- VPZXBVLAVMBEQI-UHFFFAOYSA-N glycyl-DL-alpha-alanine Natural products OC(=O)C(C)NC(=O)CN VPZXBVLAVMBEQI-UHFFFAOYSA-N 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 235000019319 peptone Nutrition 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 3
- 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 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- 108010059896 Manganese peroxidase Proteins 0.000 description 2
- 241000392443 Pleurotus citrinopileatus Species 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NJEMRSFGDNECGF-GCJQMDKQSA-N Thr-Ala-Asp Chemical compound C[C@@H](O)[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@H](C(O)=O)CC(O)=O NJEMRSFGDNECGF-GCJQMDKQSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 108010047495 alanylglycine Proteins 0.000 description 2
- 150000001413 amino acids Chemical group 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000002255 enzymatic effect Effects 0.000 description 2
- 238000009459 flexible packaging Methods 0.000 description 2
- 150000003278 haem Chemical class 0.000 description 2
- 108010025306 histidylleucine Proteins 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 210000003000 inclusion body Anatomy 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 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 description 2
- 229930027917 kanamycin Natural products 0.000 description 2
- 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 description 2
- 229960000318 kanamycin Drugs 0.000 description 2
- 229930182823 kanamycin A Natural products 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- 108010024654 phenylalanyl-prolyl-alanine Proteins 0.000 description 2
- 239000013600 plasmid vector Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 108010029020 prolylglycine Proteins 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 108010026333 seryl-proline Proteins 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000002415 sodium dodecyl sulfate polyacrylamide gel electrophoresis Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- BRPMXFSTKXXNHF-IUCAKERBSA-N (2s)-1-[2-[[(2s)-pyrrolidine-2-carbonyl]amino]acetyl]pyrrolidine-2-carboxylic acid Chemical compound OC(=O)[C@@H]1CCCN1C(=O)CNC(=O)[C@H]1NCCC1 BRPMXFSTKXXNHF-IUCAKERBSA-N 0.000 description 1
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 description 1
- QMOQBVOBWVNSNO-UHFFFAOYSA-N 2-[[2-[[2-[(2-azaniumylacetyl)amino]acetyl]amino]acetyl]amino]acetate Chemical compound NCC(=O)NCC(=O)NCC(=O)NCC(O)=O QMOQBVOBWVNSNO-UHFFFAOYSA-N 0.000 description 1
- BMUDPLZKKRQECS-UHFFFAOYSA-K 3-[18-(2-carboxyethyl)-8,13-bis(ethenyl)-3,7,12,17-tetramethylporphyrin-21,24-diid-2-yl]propanoic acid iron(3+) hydroxide Chemical compound [OH-].[Fe+3].[N-]1C2=C(C)C(CCC(O)=O)=C1C=C([N-]1)C(CCC(O)=O)=C(C)C1=CC(C(C)=C1C=C)=NC1=CC(C(C)=C1C=C)=NC1=C2 BMUDPLZKKRQECS-UHFFFAOYSA-K 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- UWQJHXKARZWDIJ-ZLUOBGJFSA-N Ala-Ala-Cys Chemical compound C[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@@H](CS)C(O)=O UWQJHXKARZWDIJ-ZLUOBGJFSA-N 0.000 description 1
- WQVFQXXBNHHPLX-ZKWXMUAHSA-N Ala-Ala-His Chemical compound C[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@@H](Cc1cnc[nH]1)C(O)=O WQVFQXXBNHHPLX-ZKWXMUAHSA-N 0.000 description 1
- YYSWCHMLFJLLBJ-ZLUOBGJFSA-N Ala-Ala-Ser Chemical compound C[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@@H](CO)C(O)=O YYSWCHMLFJLLBJ-ZLUOBGJFSA-N 0.000 description 1
- JBVSSSZFNTXJDX-YTLHQDLWSA-N Ala-Ala-Thr Chemical compound C[C@@H](O)[C@@H](C(O)=O)NC(=O)[C@H](C)NC(=O)[C@H](C)N JBVSSSZFNTXJDX-YTLHQDLWSA-N 0.000 description 1
- FSBCNCKIQZZASN-GUBZILKMSA-N Ala-Arg-Met Chemical compound [H]N[C@@H](C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCSC)C(O)=O FSBCNCKIQZZASN-GUBZILKMSA-N 0.000 description 1
- KIUYPHAMDKDICO-WHFBIAKZSA-N Ala-Asp-Gly Chemical compound C[C@H](N)C(=O)N[C@@H](CC(O)=O)C(=O)NCC(O)=O KIUYPHAMDKDICO-WHFBIAKZSA-N 0.000 description 1
- CVHJIWVKTFNGHT-ACZMJKKPSA-N Ala-Gln-Cys Chemical compound C[C@@H](C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CS)C(=O)O)N CVHJIWVKTFNGHT-ACZMJKKPSA-N 0.000 description 1
- MPLOSMWGDNJSEV-WHFBIAKZSA-N Ala-Gly-Asp Chemical compound [H]N[C@@H](C)C(=O)NCC(=O)N[C@@H](CC(O)=O)C(O)=O MPLOSMWGDNJSEV-WHFBIAKZSA-N 0.000 description 1
- LMFXXZPPZDCPTA-ZKWXMUAHSA-N Ala-Gly-Ile Chemical compound CC[C@H](C)[C@@H](C(O)=O)NC(=O)CNC(=O)[C@H](C)N LMFXXZPPZDCPTA-ZKWXMUAHSA-N 0.000 description 1
- BFMIRJBURUXDRG-DLOVCJGASA-N Ala-Phe-Asp Chemical compound OC(=O)C[C@@H](C(O)=O)NC(=O)[C@@H](NC(=O)[C@@H](N)C)CC1=CC=CC=C1 BFMIRJBURUXDRG-DLOVCJGASA-N 0.000 description 1
- VHAQSYHSDKERBS-XPUUQOCRSA-N Ala-Val-Gly Chemical compound C[C@H](N)C(=O)N[C@@H](C(C)C)C(=O)NCC(O)=O VHAQSYHSDKERBS-XPUUQOCRSA-N 0.000 description 1
- 241000588813 Alcaligenes faecalis Species 0.000 description 1
- GNYUVVJYGJFKHN-RVMXOQNASA-N Arg-Ile-Pro Chemical compound CC[C@H](C)[C@@H](C(=O)N1CCC[C@@H]1C(=O)O)NC(=O)[C@H](CCCN=C(N)N)N GNYUVVJYGJFKHN-RVMXOQNASA-N 0.000 description 1
- GMFAGHNRXPSSJS-SRVKXCTJSA-N Arg-Leu-Gln Chemical compound [H]N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(N)=O)C(O)=O GMFAGHNRXPSSJS-SRVKXCTJSA-N 0.000 description 1
- RCENDENBBJFJHZ-ACZMJKKPSA-N Asn-Asn-Gln Chemical compound [H]N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCC(N)=O)C(O)=O RCENDENBBJFJHZ-ACZMJKKPSA-N 0.000 description 1
- NYGILGUOUOXGMJ-YUMQZZPRSA-N Asn-Lys-Gly Chemical compound [H]N[C@@H](CC(N)=O)C(=O)N[C@@H](CCCCN)C(=O)NCC(O)=O NYGILGUOUOXGMJ-YUMQZZPRSA-N 0.000 description 1
- RGKKALNPOYURGE-ZKWXMUAHSA-N Asp-Ala-Val Chemical compound N[C@@H](CC(=O)O)C(=O)N[C@@H](C)C(=O)N[C@@H](C(C)C)C(=O)O RGKKALNPOYURGE-ZKWXMUAHSA-N 0.000 description 1
- TVVYVAUGRHNTGT-UGYAYLCHSA-N Asp-Asp-Ile Chemical compound CC[C@H](C)[C@@H](C(O)=O)NC(=O)[C@H](CC(O)=O)NC(=O)[C@@H](N)CC(O)=O TVVYVAUGRHNTGT-UGYAYLCHSA-N 0.000 description 1
- DONWIPDSZZJHHK-HJGDQZAQSA-N Asp-Lys-Thr Chemical compound C[C@H]([C@@H](C(=O)O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(=O)O)N)O DONWIPDSZZJHHK-HJGDQZAQSA-N 0.000 description 1
- HJZLUGQGJWXJCJ-CIUDSAMLSA-N Asp-Pro-Gln Chemical compound [H]N[C@@H](CC(O)=O)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CCC(N)=O)C(O)=O HJZLUGQGJWXJCJ-CIUDSAMLSA-N 0.000 description 1
- JSHWXQIZOCVWIA-ZKWXMUAHSA-N Asp-Ser-Val Chemical compound [H]N[C@@H](CC(O)=O)C(=O)N[C@@H](CO)C(=O)N[C@@H](C(C)C)C(O)=O JSHWXQIZOCVWIA-ZKWXMUAHSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DBPRUZCKPFOVDV-UHFFFAOYSA-N Clorprenaline hydrochloride Chemical compound O.Cl.CC(C)NCC(O)C1=CC=CC=C1Cl DBPRUZCKPFOVDV-UHFFFAOYSA-N 0.000 description 1
- 241000193403 Clostridium Species 0.000 description 1
- 235000019750 Crude protein Nutrition 0.000 description 1
- TVYMKYUSZSVOAG-ZLUOBGJFSA-N Cys-Ala-Ala Chemical compound [H]N[C@@H](CS)C(=O)N[C@@H](C)C(=O)N[C@@H](C)C(O)=O TVYMKYUSZSVOAG-ZLUOBGJFSA-N 0.000 description 1
- KIHRUISMQZVCNO-ZLUOBGJFSA-N Cys-Asp-Asp Chemical compound SC[C@H](N)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC(O)=O)C(O)=O KIHRUISMQZVCNO-ZLUOBGJFSA-N 0.000 description 1
- OXFOKRAFNYSREH-BJDJZHNGSA-N Cys-Ile-Leu Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CC(C)C)C(=O)O)NC(=O)[C@H](CS)N OXFOKRAFNYSREH-BJDJZHNGSA-N 0.000 description 1
- RJPKQCFHEPPTGL-ZLUOBGJFSA-N Cys-Ser-Asp Chemical compound [H]N[C@@H](CS)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(O)=O)C(O)=O RJPKQCFHEPPTGL-ZLUOBGJFSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 241000672609 Escherichia coli BL21 Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- OETQLUYCMBARHJ-CIUDSAMLSA-N Gln-Asn-Arg Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(O)=O OETQLUYCMBARHJ-CIUDSAMLSA-N 0.000 description 1
- LWDGZZGWDMHBOF-FXQIFTODSA-N Gln-Glu-Asn Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(N)=O)C(O)=O LWDGZZGWDMHBOF-FXQIFTODSA-N 0.000 description 1
- MFJAPSYJQJCQDN-BQBZGAKWSA-N Gln-Gly-Glu Chemical compound NC(=O)CC[C@H](N)C(=O)NCC(=O)N[C@@H](CCC(O)=O)C(O)=O MFJAPSYJQJCQDN-BQBZGAKWSA-N 0.000 description 1
- OGMQXTXGLDNBSS-FXQIFTODSA-N Glu-Ala-Gln Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(N)=O)C(O)=O OGMQXTXGLDNBSS-FXQIFTODSA-N 0.000 description 1
- INGJLBQKTRJLFO-UKJIMTQDSA-N Glu-Ile-Val Chemical compound CC(C)[C@@H](C(O)=O)NC(=O)[C@H]([C@@H](C)CC)NC(=O)[C@@H](N)CCC(O)=O INGJLBQKTRJLFO-UKJIMTQDSA-N 0.000 description 1
- LPHGXOWFAXFCPX-KKUMJFAQSA-N Glu-Pro-Phe Chemical compound C1C[C@H](N(C1)C(=O)[C@H](CCC(=O)O)N)C(=O)N[C@@H](CC2=CC=CC=C2)C(=O)O LPHGXOWFAXFCPX-KKUMJFAQSA-N 0.000 description 1
- ZNOHKCPYDAYYDA-BPUTZDHNSA-N Glu-Trp-Gln Chemical compound [H]N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC1=CNC2=C1C=CC=C2)C(=O)N[C@@H](CCC(N)=O)C(O)=O ZNOHKCPYDAYYDA-BPUTZDHNSA-N 0.000 description 1
- VXKCPBPQEKKERH-IUCAKERBSA-N Gly-Arg-Pro Chemical compound NC(N)=NCCC[C@H](NC(=O)CN)C(=O)N1CCC[C@H]1C(O)=O VXKCPBPQEKKERH-IUCAKERBSA-N 0.000 description 1
- KKBWDNZXYLGJEY-UHFFFAOYSA-N Gly-Arg-Pro Natural products NCC(=O)NC(CCNC(=N)N)C(=O)N1CCCC1C(=O)O KKBWDNZXYLGJEY-UHFFFAOYSA-N 0.000 description 1
- DTPOVRRYXPJJAZ-FJXKBIBVSA-N Gly-Arg-Thr Chemical compound C[C@@H](O)[C@@H](C(O)=O)NC(=O)[C@@H](NC(=O)CN)CCCN=C(N)N DTPOVRRYXPJJAZ-FJXKBIBVSA-N 0.000 description 1
- KQDMENMTYNBWMR-WHFBIAKZSA-N Gly-Asp-Ala Chemical compound [H]NCC(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](C)C(O)=O KQDMENMTYNBWMR-WHFBIAKZSA-N 0.000 description 1
- SOEATRRYCIPEHA-BQBZGAKWSA-N Gly-Glu-Glu Chemical compound [H]NCC(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCC(O)=O)C(O)=O SOEATRRYCIPEHA-BQBZGAKWSA-N 0.000 description 1
- BNMRSWQOHIQTFL-JSGCOSHPSA-N Gly-Val-Phe Chemical compound NCC(=O)N[C@@H](C(C)C)C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 BNMRSWQOHIQTFL-JSGCOSHPSA-N 0.000 description 1
- UZZXGLOJRZKYEL-DJFWLOJKSA-N His-Asn-Ile Chemical compound [H]N[C@@H](CC1=CNC=N1)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O UZZXGLOJRZKYEL-DJFWLOJKSA-N 0.000 description 1
- VOEGKUNRHYKYSU-XVYDVKMFSA-N His-Asp-Ala Chemical compound [H]N[C@@H](CC1=CNC=N1)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](C)C(O)=O VOEGKUNRHYKYSU-XVYDVKMFSA-N 0.000 description 1
- KFKWRHQBZQICHA-STQMWFEESA-N L-leucyl-L-phenylalanine Natural products CC(C)C[C@H](N)C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 KFKWRHQBZQICHA-STQMWFEESA-N 0.000 description 1
- LJHGALIOHLRRQN-DCAQKATOSA-N Leu-Ala-Arg Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@H](C(O)=O)CCCN=C(N)N LJHGALIOHLRRQN-DCAQKATOSA-N 0.000 description 1
- FIYMBBHGYNQFOP-IUCAKERBSA-N Leu-Gly-Gln Chemical compound CC(C)C[C@@H](C(=O)NCC(=O)N[C@@H](CCC(=O)N)C(=O)O)N FIYMBBHGYNQFOP-IUCAKERBSA-N 0.000 description 1
- KOSWSHVQIVTVQF-ZPFDUUQYSA-N Leu-Ile-Asp Chemical compound [H]N[C@@H](CC(C)C)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CC(O)=O)C(O)=O KOSWSHVQIVTVQF-ZPFDUUQYSA-N 0.000 description 1
- UHNQRAFSEBGZFZ-YESZJQIVSA-N Leu-Phe-Pro Chemical compound CC(C)C[C@@H](C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)N2CCC[C@@H]2C(=O)O)N UHNQRAFSEBGZFZ-YESZJQIVSA-N 0.000 description 1
- WMIOEVKKYIMVKI-DCAQKATOSA-N Leu-Pro-Ala Chemical compound [H]N[C@@H](CC(C)C)C(=O)N1CCC[C@H]1C(=O)N[C@@H](C)C(O)=O WMIOEVKKYIMVKI-DCAQKATOSA-N 0.000 description 1
- IZPVWNSAVUQBGP-CIUDSAMLSA-N Leu-Ser-Asp Chemical compound [H]N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(O)=O)C(O)=O IZPVWNSAVUQBGP-CIUDSAMLSA-N 0.000 description 1
- ODRREERHVHMIPT-OEAJRASXSA-N Leu-Thr-Phe Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 ODRREERHVHMIPT-OEAJRASXSA-N 0.000 description 1
- AAKRWBIIGKPOKQ-ONGXEEELSA-N Leu-Val-Gly Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](C(C)C)C(=O)NCC(O)=O AAKRWBIIGKPOKQ-ONGXEEELSA-N 0.000 description 1
- FDBTVENULFNTAL-XQQFMLRXSA-N Leu-Val-Pro Chemical compound CC(C)C[C@@H](C(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@@H]1C(=O)O)N FDBTVENULFNTAL-XQQFMLRXSA-N 0.000 description 1
- GQZMPWBZQALKJO-UWVGGRQHSA-N Lys-Gly-Arg Chemical compound [H]N[C@@H](CCCCN)C(=O)NCC(=O)N[C@@H](CCCNC(N)=N)C(O)=O GQZMPWBZQALKJO-UWVGGRQHSA-N 0.000 description 1
- LECIJRIRMVOFMH-ULQDDVLXSA-N Lys-Pro-Phe Chemical compound NCCCC[C@H](N)C(=O)N1CCC[C@H]1C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 LECIJRIRMVOFMH-ULQDDVLXSA-N 0.000 description 1
- QEVRUYFHWJJUHZ-DCAQKATOSA-N Met-Ala-Leu Chemical compound CSCC[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@H](C(O)=O)CC(C)C QEVRUYFHWJJUHZ-DCAQKATOSA-N 0.000 description 1
- DSZFTPCSFVWMKP-DCAQKATOSA-N Met-Ser-Lys Chemical compound CSCC[C@H](N)C(=O)N[C@@H](CO)C(=O)N[C@H](C(O)=O)CCCCN DSZFTPCSFVWMKP-DCAQKATOSA-N 0.000 description 1
- 108010061951 Methemoglobin Proteins 0.000 description 1
- SITLTJHOQZFJGG-UHFFFAOYSA-N N-L-alpha-glutamyl-L-valine Natural products CC(C)C(C(O)=O)NC(=O)C(N)CCC(O)=O SITLTJHOQZFJGG-UHFFFAOYSA-N 0.000 description 1
- 108010079364 N-glycylalanine Proteins 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- FPTXMUIBLMGTQH-ONGXEEELSA-N Phe-Ala-Gly Chemical compound OC(=O)CNC(=O)[C@H](C)NC(=O)[C@@H](N)CC1=CC=CC=C1 FPTXMUIBLMGTQH-ONGXEEELSA-N 0.000 description 1
- CSYVXYQDIVCQNU-QWRGUYRKSA-N Phe-Asp-Gly Chemical compound [H]N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CC(O)=O)C(=O)NCC(O)=O CSYVXYQDIVCQNU-QWRGUYRKSA-N 0.000 description 1
- MIICYIIBVYQNKE-QEWYBTABSA-N Phe-Ile-Gln Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CCC(=O)N)C(=O)O)NC(=O)[C@H](CC1=CC=CC=C1)N MIICYIIBVYQNKE-QEWYBTABSA-N 0.000 description 1
- KRYSMKKRRRWOCZ-QEWYBTABSA-N Phe-Ile-Glu Chemical compound [H]N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCC(O)=O)C(O)=O KRYSMKKRRRWOCZ-QEWYBTABSA-N 0.000 description 1
- AXIOGMQCDYVTNY-ACRUOGEOSA-N Phe-Phe-Leu Chemical compound C([C@@H](C(=O)N[C@@H](CC(C)C)C(O)=O)NC(=O)[C@@H](N)CC=1C=CC=CC=1)C1=CC=CC=C1 AXIOGMQCDYVTNY-ACRUOGEOSA-N 0.000 description 1
- DBALDZKOTNSBFM-FXQIFTODSA-N Pro-Ala-Asn Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](C)C(=O)N[C@@H](CC(N)=O)C(O)=O DBALDZKOTNSBFM-FXQIFTODSA-N 0.000 description 1
- IFMDQWDAJUMMJC-DCAQKATOSA-N Pro-Ala-Leu Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(O)=O IFMDQWDAJUMMJC-DCAQKATOSA-N 0.000 description 1
- KIGGUSRFHJCIEJ-DCAQKATOSA-N Pro-Asp-His Chemical compound C1C[C@H](NC1)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CC2=CN=CN2)C(=O)O KIGGUSRFHJCIEJ-DCAQKATOSA-N 0.000 description 1
- HAAQQNHQZBOWFO-LURJTMIESA-N Pro-Gly-Gly Chemical compound OC(=O)CNC(=O)CNC(=O)[C@@H]1CCCN1 HAAQQNHQZBOWFO-LURJTMIESA-N 0.000 description 1
- DXTOOBDIIAJZBJ-BQBZGAKWSA-N Pro-Gly-Ser Chemical compound [H]N1CCC[C@H]1C(=O)NCC(=O)N[C@@H](CO)C(O)=O DXTOOBDIIAJZBJ-BQBZGAKWSA-N 0.000 description 1
- AFXCXDQNRXTSBD-FJXKBIBVSA-N Pro-Gly-Thr Chemical compound [H]N1CCC[C@H]1C(=O)NCC(=O)N[C@@H]([C@@H](C)O)C(O)=O AFXCXDQNRXTSBD-FJXKBIBVSA-N 0.000 description 1
- VZKBJNBZMZHKRC-XUXIUFHCSA-N Pro-Ile-Leu Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CC(C)C)C(O)=O VZKBJNBZMZHKRC-XUXIUFHCSA-N 0.000 description 1
- VWHJZETTZDAGOM-XUXIUFHCSA-N Pro-Lys-Ile Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O VWHJZETTZDAGOM-XUXIUFHCSA-N 0.000 description 1
- AWQGDZBKQTYNMN-IHRRRGAJSA-N Pro-Phe-Asp Chemical compound C1C[C@H](NC1)C(=O)N[C@@H](CC2=CC=CC=C2)C(=O)N[C@@H](CC(=O)O)C(=O)O AWQGDZBKQTYNMN-IHRRRGAJSA-N 0.000 description 1
- KBUAPZAZPWNYSW-SRVKXCTJSA-N Pro-Pro-Val Chemical compound CC(C)[C@@H](C(O)=O)NC(=O)[C@@H]1CCCN1C(=O)[C@H]1NCCC1 KBUAPZAZPWNYSW-SRVKXCTJSA-N 0.000 description 1
- ITUDDXVFGFEKPD-NAKRPEOUSA-N Pro-Ser-Ile Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](CO)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O ITUDDXVFGFEKPD-NAKRPEOUSA-N 0.000 description 1
- FDMCIBSQRKFSTJ-RHYQMDGZSA-N Pro-Thr-Leu Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(C)C)C(O)=O FDMCIBSQRKFSTJ-RHYQMDGZSA-N 0.000 description 1
- IMNVAOPEMFDAQD-NHCYSSNCSA-N Pro-Val-Glu Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(O)=O)C(O)=O IMNVAOPEMFDAQD-NHCYSSNCSA-N 0.000 description 1
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 1
- 241000589776 Pseudomonas putida Species 0.000 description 1
- 241000316848 Rhodococcus <scale insect> Species 0.000 description 1
- MMGJPDWSIOAGTH-ACZMJKKPSA-N Ser-Ala-Gln Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(N)=O)C(O)=O MMGJPDWSIOAGTH-ACZMJKKPSA-N 0.000 description 1
- SFZKGGOGCNQPJY-CIUDSAMLSA-N Ser-Asp-His Chemical compound C1=C(NC=N1)C[C@@H](C(=O)O)NC(=O)[C@H](CC(=O)O)NC(=O)[C@H](CO)N SFZKGGOGCNQPJY-CIUDSAMLSA-N 0.000 description 1
- GWMXFEMMBHOKDX-AVGNSLFASA-N Ser-Gln-Phe Chemical compound OC[C@H](N)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 GWMXFEMMBHOKDX-AVGNSLFASA-N 0.000 description 1
- HBTCFCHYALPXME-HTFCKZLJSA-N Ser-Ile-Ile Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(O)=O HBTCFCHYALPXME-HTFCKZLJSA-N 0.000 description 1
- RIAKPZVSNBBNRE-BJDJZHNGSA-N Ser-Ile-Leu Chemical compound OC[C@H](N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CC(C)C)C(O)=O RIAKPZVSNBBNRE-BJDJZHNGSA-N 0.000 description 1
- QYSFWUIXDFJUDW-DCAQKATOSA-N Ser-Leu-Arg Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(O)=O QYSFWUIXDFJUDW-DCAQKATOSA-N 0.000 description 1
- ASGYVPAVFNDZMA-GUBZILKMSA-N Ser-Met-Val Chemical compound CC(C)[C@@H](C(=O)O)NC(=O)[C@H](CCSC)NC(=O)[C@H](CO)N ASGYVPAVFNDZMA-GUBZILKMSA-N 0.000 description 1
- FKYWFUYPVKLJLP-DCAQKATOSA-N Ser-Pro-Leu Chemical compound CC(C)C[C@@H](C(O)=O)NC(=O)[C@@H]1CCCN1C(=O)[C@@H](N)CO FKYWFUYPVKLJLP-DCAQKATOSA-N 0.000 description 1
- ZSDXEKUKQAKZFE-XAVMHZPKSA-N Ser-Thr-Pro Chemical compound C[C@H]([C@@H](C(=O)N1CCC[C@@H]1C(=O)O)NC(=O)[C@H](CO)N)O ZSDXEKUKQAKZFE-XAVMHZPKSA-N 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- DFTCYYILCSQGIZ-GCJQMDKQSA-N Thr-Ala-Asn Chemical compound [H]N[C@@H]([C@@H](C)O)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(N)=O)C(O)=O DFTCYYILCSQGIZ-GCJQMDKQSA-N 0.000 description 1
- YRNBANYVJJBGDI-VZFHVOOUSA-N Thr-Ala-Cys Chemical compound C[C@H]([C@@H](C(=O)N[C@@H](C)C(=O)N[C@@H](CS)C(=O)O)N)O YRNBANYVJJBGDI-VZFHVOOUSA-N 0.000 description 1
- JBHMLZSKIXMVFS-XVSYOHENSA-N Thr-Asn-Phe Chemical compound [H]N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC1=CC=CC=C1)C(O)=O JBHMLZSKIXMVFS-XVSYOHENSA-N 0.000 description 1
- RKDFEMGVMMYYNG-WDCWCFNPSA-N Thr-Gln-Leu Chemical compound [H]N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC(C)C)C(O)=O RKDFEMGVMMYYNG-WDCWCFNPSA-N 0.000 description 1
- XTCNBOBTROGWMW-RWRJDSDZSA-N Thr-Ile-Glu Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CCC(=O)O)C(=O)O)NC(=O)[C@H]([C@@H](C)O)N XTCNBOBTROGWMW-RWRJDSDZSA-N 0.000 description 1
- OLFOOYQTTQSSRK-UNQGMJICSA-N Thr-Pro-Phe Chemical compound C[C@@H](O)[C@H](N)C(=O)N1CCC[C@H]1C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 OLFOOYQTTQSSRK-UNQGMJICSA-N 0.000 description 1
- MROIJTGJGIDEEJ-RCWTZXSCSA-N Thr-Pro-Pro Chemical compound C[C@@H](O)[C@H](N)C(=O)N1CCC[C@H]1C(=O)N1[C@H](C(O)=O)CCC1 MROIJTGJGIDEEJ-RCWTZXSCSA-N 0.000 description 1
- IEZVHOULSUULHD-XGEHTFHBSA-N Thr-Ser-Val Chemical compound [H]N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CO)C(=O)N[C@@H](C(C)C)C(O)=O IEZVHOULSUULHD-XGEHTFHBSA-N 0.000 description 1
- RUCNAYOMFXRIKJ-DCAQKATOSA-N Val-Ala-Lys Chemical compound CC(C)[C@H](N)C(=O)N[C@@H](C)C(=O)N[C@H](C(O)=O)CCCCN RUCNAYOMFXRIKJ-DCAQKATOSA-N 0.000 description 1
- VLDMQVZZWDOKQF-AUTRQRHGSA-N Val-Glu-Gln Chemical compound CC(C)[C@@H](C(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](CCC(=O)N)C(=O)O)N VLDMQVZZWDOKQF-AUTRQRHGSA-N 0.000 description 1
- RHYOAUJXSRWVJT-GVXVVHGQSA-N Val-His-Glu Chemical compound CC(C)[C@@H](C(=O)N[C@@H](CC1=CN=CN1)C(=O)N[C@@H](CCC(=O)O)C(=O)O)N RHYOAUJXSRWVJT-GVXVVHGQSA-N 0.000 description 1
- JZWZACGUZVCQPS-RNJOBUHISA-N Val-Ile-Pro Chemical compound CC[C@H](C)[C@@H](C(=O)N1CCC[C@@H]1C(=O)O)NC(=O)[C@H](C(C)C)N JZWZACGUZVCQPS-RNJOBUHISA-N 0.000 description 1
- KSFXWENSJABBFI-ZKWXMUAHSA-N Val-Ser-Asn Chemical compound [H]N[C@@H](C(C)C)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(N)=O)C(O)=O KSFXWENSJABBFI-ZKWXMUAHSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 229940005347 alcaligenes faecalis Drugs 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 108010069205 aspartyl-phenylalanine Proteins 0.000 description 1
- 108010093581 aspartyl-proline Proteins 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000006652 catabolic pathway Effects 0.000 description 1
- 230000006037 cell lysis Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 239000012084 conversion product Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 108010004073 cysteinylcysteine Proteins 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 1
- 235000019797 dipotassium phosphate Nutrition 0.000 description 1
- WPUMTJGUQUYPIV-JIZZDEOASA-L disodium (S)-malate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](O)CC([O-])=O WPUMTJGUQUYPIV-JIZZDEOASA-L 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000007515 enzymatic degradation Effects 0.000 description 1
- 238000006911 enzymatic reaction Methods 0.000 description 1
- 238000003028 enzyme activity measurement method Methods 0.000 description 1
- 238000001976 enzyme digestion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 108010050848 glycylleucine Proteins 0.000 description 1
- 108010037850 glycylvaline Proteins 0.000 description 1
- 229940109738 hematin Drugs 0.000 description 1
- 108010092114 histidylphenylalanine Proteins 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 108010073093 leucyl-glycyl-glycyl-glycine Proteins 0.000 description 1
- 108010034529 leucyl-lysine Proteins 0.000 description 1
- 108010044056 leucyl-phenylalanine Proteins 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229940049920 malate Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 108010005942 methionylglycine Proteins 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007248 oxidative elimination reaction Methods 0.000 description 1
- YPZRWBKMTBYPTK-UHFFFAOYSA-N oxidized gamma-L-glutamyl-L-cysteinylglycine Natural products OC(=O)C(N)CCC(=O)NC(C(=O)NCC(O)=O)CSSCC(C(=O)NCC(O)=O)NC(=O)CCC(N)C(O)=O YPZRWBKMTBYPTK-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000008177 pharmaceutical agent Substances 0.000 description 1
- 108010084572 phenylalanyl-valine Proteins 0.000 description 1
- 108010073025 phenylalanylphenylalanine Proteins 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 108010020755 prolyl-glycyl-glycine Proteins 0.000 description 1
- 108010093296 prolyl-prolyl-alanine Proteins 0.000 description 1
- 108010070643 prolylglutamic acid Proteins 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 235000019265 sodium DL-malate Nutrition 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 108010015385 valyl-prolyl-proline Proteins 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/50—Destroying solid waste or transforming solid waste into something useful or harmless involving radiation, e.g. electro-magnetic waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/60—Biochemical treatment, e.g. by using enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/75—Plastic waste
- B09B2101/77—Plastic waste containing chlorine
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Genetics & Genomics (AREA)
- Organic Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- General Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Toxicology (AREA)
- Medicinal Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明公开了一种多功能过氧化物酶在聚乙烯降解中的应用,属于酶工程技术领域。本发明提供了刺芹侧耳(Pleurotus eryngii)来源的多功能过氧化物酶在聚乙烯降解中的新用途,并通过优化酶解反应体系,以苹果酸缓冲液提供反应环境,通过H2O2启动酶解反应,在30℃,200rpm条件下反应72h后的聚乙烯薄膜部分降解为醛、酮、醇、酸类等小分子化合物,使降解后的薄膜表面存在明显刻蚀,亲水性得到明显增强。本发明提供的降解紫外处理聚乙烯薄膜的方法,反应条件温和、环境友好在塑料产品生物降解领域具备较为理想的应用前景。
Description
技术领域
本发明涉及一种多功能过氧化物酶在聚乙烯降解中的应用,属于酶工程技术领域。
背景技术
塑料是以单体为原料,通过加聚或缩聚反应聚合而成的高分子化合物。大部分塑料化学性能稳定,抗腐蚀能力强,制造成本低,是重要的有机合成高分子材料,应用非常广泛。
根据合成塑料单体连接方式及碳链类型,可将塑料分为聚烯烃类和聚酯类。聚酯类塑料由多元醇和多元酸缩聚而成,主要指聚对苯二甲酸乙二酯(PET),由于存在可水解的酯键,在很多报道中已实现了高效降解。聚烯烃类塑料通常是乙烯、丙烯或高级烯烃的聚合物,具有极强的物理化学稳定性,聚烯烃类塑料的生物降解效果甚微,目前还处在微生物筛选和酶类鉴定阶段,关于微生物和酶类的降解途径及机理还未做深入研究。一些众所周知的微生物已被报道为聚烯烃降解菌,如白腐真菌、红球菌、绿假单胞菌、恶臭假单胞菌、褐单孢菌、粪产碱杆菌、梭菌等。
聚乙烯(PE)是塑料垃圾的主要来源,加之难以降解。这使得PE塑料垃圾在环境中持续积累,对生态构成了严重的威胁。目前已报道的PE降解酶比酶活不高,降解效果比较微弱,且降解过程及机理不明,亟待开发新的降解效率更高的PE降解酶。
发明内容
本发明提供了刺芹侧耳(Pleurotus eryngii)来源的多功能过氧化物酶在降解聚乙烯或含聚乙烯的塑料中的应用。
在一种实施方式中,所述多功能过氧化物酶的氨基酸序列如O94753.1所示。
在一种实施方式中,所述含聚乙烯的塑料包括但不限于聚乙烯薄膜。
在一种实施方式中,所述聚乙烯薄膜经紫外预处理。
在一种实施方式中,所述紫外预处理是将聚乙烯薄膜在60~80℃、UV辐射强度为150~250V的条件下处理至少4天,或至少8天,获得经紫外预处理的聚乙烯薄膜(UVPE)。
本发明还提供了一种降解含聚乙烯的塑料产品的方法,包括步骤(a)、(b):
(a)将含聚乙烯的塑料产品进行紫外辐照处理;
(b)将步骤(a)处理后的含聚乙烯的塑料产品与多功能过氧化物酶在溶液环境中接触,并发生酶解反应。
在一种实施方式中,步骤(b)的反应体系为10mL反应体系中包含面积1-9cm2厚度10~20μm、质量25~200mg的聚乙烯塑料薄膜。
在一种实施方式中,步骤(b)的反应体系中多功能过氧化物酶的作用剂量≥0.1U/mg塑料产品。
在一种实施方式中,所述多功能过氧化物酶的初始添加量为1U/mL,每隔24h补加1U/mL的酶液。
在一种实施方式中,所述反应的温度≥30℃,pH为4.5~5.5。
在一种实施方式中,所述酶解反应的温度为30℃,降解时间为72h。
在一种实施方式中,所述酶解反应在苹果酸-苹果酸钠缓冲液中进行。
在一种实施方式中,所述苹果酸-苹果酸钠缓冲液的浓度≥25mM,或≥50mM,或浓度为50~75mM。
在一种实施方式中,所述苹果酸-苹果酸钠缓冲液的pH为4.5~5.5。
在一种实施方式中,所述多功能过氧化物酶由微生物发酵制得。
在一种实施方式中,所述多功能过氧化物酶的制备方法包括:
(1)将SEQ ID NO.1所示的PEvp基因与pET载体连接,并转化至大肠杆菌中,获得重组大肠杆菌;
(2)将重组大肠杆菌在适宜的温度下培养,收集培养物中的多功能过氧化物酶。
在一种实施方式中,所述多功能过氧化物酶还经过变性、复性处理。
本发明还提供了编码氨基酸序列如O94753.1所示的多功能过氧化物酶的基因、含有多功能过氧化物酶的基因的重组质粒、携带多功能过氧化物酶的基因的宿主细胞。
在一种实施方式中,所述基因的核苷酸序列如SEQ ID NO.1所示。
在一种实施方式中,所述重组质粒的载体为pET系列质粒。
在一种实施方式中,所述重组质粒的载体为pET-24a(+)质粒。
在一种实施方式中,所述宿主细胞为大肠杆菌。
在一种实施方式中,所述宿主细胞为大肠杆菌Escherichia coli BL21。
本发明还提供所述多功能过氧化物酶、携带多功能过氧化物酶的重组微生物细胞,或所述方法在塑料产品降解方面的应用。
在一种实施方式中,所述塑料产品包括但不限于刚性或柔性包装(薄膜、瓶、托盘)、农用薄膜、袋、一次性物品、纺织品、织物、无纺布、地板覆盖物、塑料废物或纤维废物等。
有益效果:
(1)本发明提供了一种可降解紫外预处理聚乙烯薄膜(UVPE)的多功能过氧化物酶,将多功能过氧化物酶加入含有紫外处理聚乙烯薄膜(UVPE)、4mM MnSO4的75mM的苹果酸缓冲液中(pH 4.5),添加0.2mM H2O2启动酶解反应,其在30℃,200rpm条件下反应72h,在中间反应过程中每隔24h补加1U/mL的酶量,每隔12h补加0.1mM H2O2水溶液。可使紫外处理聚乙烯薄膜(UVPE)部分降解为醛、酮、醇、酸类等小分子化合物,其薄膜表面存在明显刻蚀,亲水性得到明显增强。
相比于公开号为CN113897378A的锰过氧化物酶,按照终浓度1U/mL的加酶量所需酶蛋白为0.06mg/mL,本发明中的多功能过氧化物酶1U/mL加酶量所需酶蛋白为0.03mg/mL,酶的用量减少一倍即可达到相同或更优的降解效果。
(2)本发明提供了一种降解紫外处理聚乙烯薄膜(UVPE)的方法,该方法反应条件温和、环境友好,因此本发明提供的多功能过氧化物酶在降解紫外处理聚乙烯薄膜(UVPE)中具备极高的应用前景。
(3)本发明对酶解紫外处理聚乙烯薄膜(UVPE)的反应体系进行了优化,以苹果酸缓冲液提供反应环境,通过H2O2启动酶解反应,提高了UVPE的降解效率。
附图说明
图1:多功能过氧化物酶的SDS-PAGE分析;其中,M为蛋白质分子量标准;泳道1、3、5分别对应IPTG终浓度为0、0.2和0.4mM的细胞裂解上清液蛋白;2、4、6分别对应IPTG终浓度为0,0.2和0.4mM的包涵体蛋白,箭头代表目的条带。
图2:多功能过氧化物酶的酶学性质;其中(A)为最适温度,(B)为最适pH,(C)为温度稳定性。
图3:多功能过氧化物酶对紫外预处理聚乙烯薄膜(UVPE)扫描电子显微镜(SEM)检测结果。
图4:多功能过氧化物酶对紫外预处理聚乙烯薄膜(UVPE)傅立叶变换红外光谱(FTIR)检测结果;线条以左侧起始处从上往下,分别代表UVPE组、UVPE对照组、UVPE实验组。
图5:多功能过氧化物酶Pevp对UVPE8薄膜降解产物GC-MS分析及产物类型比例。
图6:多功能过氧化物酶对紫外预处理聚乙烯薄膜(UVPE)亲水角(Contact Angle)检测结果;其中,A是UVPE-对照组,B是UVPE-实验组。
图7:有机酸类型对多功能过氧化物酶Pevp活性的影响。
图8:苹果酸缓冲液浓度对多功能过氧化物酶Pevp活性的影响。
图9:H2O2浓度对多功能过氧化物酶Pevp活性的影响。
图10:Mn2+浓度对多功能过氧化物酶Pevp活性的影响。
图11:多功能过氧化物酶Pevp对UVPE4薄膜降解产物的GC-MS分析及产物类型比例。
具体实施方式
技术术语:
降解:塑料或含PE的塑料的“降解”是指将塑料材料的聚合物分解成更小的分子,例如单体和/或低聚物。在本发明的情况下,用于降解PE或含PE的塑料材料是指将塑料中的PE降解成单体(如苯乙烯)和/或醛、酮、羧酸、烷烃类物质等。
塑料:术语“塑料”或“塑料材料”是指塑料产品(例如片材、托盘、薄膜、管、块、纤维、织物等)以及用于制造塑料产品的塑料组合物。除了聚合物之外,塑料材料还可以包含其他物质或添加剂,例如增塑剂、矿物或有机填料、染料等。因此,在本发明的上下文中,塑料材料是指包含至少一种半结晶和/或无定形形式的聚合物,特别是至少一种聚乙烯的任何塑料产品和/或塑料组合物。
塑料产品:术语“塑料产品”包括经制造的含塑料的产品,例如刚性或柔性包装(薄膜、瓶、托盘)、农用薄膜、袋、一次性物品、纺织品、织物、无纺布、地板覆盖物、塑料废物或纤维废物等。
聚合物:术语“聚合物”是指其结构由通过化学共价键连接的多个重复单元(即“单体”)组成的化合物。在本发明的上下文中,在不做特别说明的情况下,“聚合物”更具体地是指在塑料材料的组合物中使用的此类化合物。
紫外预处理:本发明所指的“紫外预处理”是指在酶反应前对聚乙烯材料或含聚乙烯的材料所作的处理,包括但不限于通过紫外辐照等方式使待处理的材料发生氧化。
紫外预处理聚乙烯薄膜:本发明所指的“紫外预处理聚乙烯薄膜(UVPE)”是指经UV辐照后表面发生了一定程度刻蚀现象的聚乙烯薄膜;所述UV辐照的强度范围为100-250V;可选地,为了保证紫外照射的均一性,可以每隔一段时间(例如12~24h)对聚乙烯薄膜进行翻面处理。
下述实施例中涉及的材料及试剂:
下述实施例中涉及的LDPE薄膜购自淘宝网店诚信塑料五金包装,颜色透明,拉伸比例为400%,厚度为20μm;羟高铁血红素(HEMATIN)、二硫苏糖醇(DTT)购自国药试剂;氧化型谷胱甘肽(GSSG)购自西安雅图生物科技有限公司。
下述实施例中涉及的培养基如下:
LB固体培养基(g/L):蛋白胨10、酵母粉5、氯化钠10、琼脂13,pH 7.0。
LB液体培养基(g/L):蛋白胨10、酵母粉5、氯化钠10,pH 7.0。
TB液体培养基(g/L):蛋白胨12、酵母粉24、甘油4mL、磷酸二氢钾2.31、磷酸氢二钾12.54。
下述实施例中涉及的检测方法如下:
多功能过氧化物酶酶活测定方法:
总反应体系为1mL:pH 4.5的50mM的苹果酸缓冲液,1.0mM的MnSO2溶液,酶液50μL,在25℃条件下,加入0.1mM的H2O2溶液启动反应,连续观察反应最初3min内240nm处吸光度的变化(EM240=6500L·mol-1cm-1),酶活力定义为:每min使1μmo1的Mn2+转化为Mn3+所需的酶量为一个酶活力单位(U)。计算公式如下所示:
N:酶液稀释倍数;
V总:测活反应的总体积(mL);
V酶:反应添加的酶液体积(mL);
T:反应时间(min);
ΔOD240:T时间内反应液在240nm处波长的增加;
L:比色皿的直径(cm);
6500:240nm处Mn2+转化为Mn3+的摩尔吸光系数(L·mol-1cm-1)。
聚乙烯(PE)塑料薄膜表面微观结构的检测方法:
将经多功能过氧化物酶处理后紫外预处理的聚乙烯薄膜(UVPE),用去离子水反复清洗3~4次;将清洗完的薄膜依次用2%SDS(v/v)、去离子水、50%乙醇分别超声清洗两遍以除去薄膜表面的蛋白等杂质,每次30min。结束漂洗后将膜片包入称量纸内放置在60℃的烘箱进行烘干。以未经处理的紫外预处理的聚乙烯薄膜(UVPE)为对照,使用扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)以及亲水角(Contact Angle)检测未经处理的紫外预处理的聚乙烯薄膜(UVPE)表面以及经多功能过氧化物酶处理后紫外预处理聚乙烯薄膜(UVPE)表面微观结构。
实施例1携带多功能过氧化物酶基因的重组质粒的构建
利用化学方法将编码如O94753.1所示多功能过氧化物酶的基因(核苷酸序列如SEQ ID NO.1所示)合成到载体pET-24a(+)上NdeI和EcoRI酶切位点之间,获得重组质粒pET-24a(+)-PEvp,将重组质粒转化大肠杆菌(Escherichia coli)JM109,得到转化产物;将转化产物涂布在LB固体培养基(含有40μg/mL卡那霉素)上,于37℃恒温培养箱中倒置培养8~12h,得到转化子;挑取转化子接种至LB液体培养基中,于37℃、120~180rpm的条件下摇瓶培养8~12h后提取质粒进行测序验证,验证正确即获得重组质粒pET-24a(+)-PEvp。
实施例2表达多功能过氧化物酶的重组大肠杆菌的构建
将实施例1构建的重组质粒pET-24a(+)-PEvp转化大肠杆菌Escherichia coliBL21感受态细胞中,得到转化产物;将转化产物涂布在LB固体培养基(含有50μg/mL卡那霉素)上,于37℃恒温培养箱中倒置培养8~12h,得到转化子;挑取转化子接种至LB液体培养基中,于37℃、120~180rpm的条件下摇瓶培养8~12h后提取质粒进行酶切验证以及测序验证,验证正确即获得重组大肠杆菌Escherichia coli BL21/pET-24a(+)-PEvp。
实施例3重组大肠杆菌摇瓶发酵产多功能过氧化物酶
将实施例2在37℃、120~180rpm的条件下摇瓶培养8~12h后获得的重组大肠杆菌Escherichia coli BL21/pET-24a(+)-PEvp菌液以5%(v/v)的接种量转接至100mL的TB液体培养基中,于37℃、200rpm摇床培养3h至OD600=0.8后添加IPTG至终浓度为0.4mM,于25℃、200rpm继续摇床培养20h,获得发酵液。
将发酵液于8000rpm的条件下离心15min取沉淀;用pH 7.0 10mM Tris-HCl缓冲液悬浮沉淀,获得重悬液;将重悬液用高压匀浆机于压力为800Bar的条件下破壁,得到破壁液;将破壁液于8000rpm的条件下离心15min,将破壁上清、破壁沉淀分离。
分别对发酵上清液、破壁上清液、破壁沉淀三部分进行酶活测定,发现均没有酶活,证明该重组多功能过氧化物酶未有可溶性表达。破壁沉淀经SDS-PAGE分析显示在37kDa条带出存在粗的蛋白带,即为多功能过氧化物酶。
实施例4多功能过氧化物酶的体外变复性
变性:将实施例3制备获得的破壁沉淀(包涵体沉淀)溶于pH=9.5的50mM的Tris-HCl缓冲液,加入8M的尿素,1mM的EDTA,5mM的DTT,和10%的甘油。4℃静置4-5h。
复性:将蛋白变性液加入到复性体系中(pH 9.5Tis-HCl缓冲液、0.5M尿素、0.5mMGSSG、0.1mM DTT、0.1mM EDTA、5mM CaCl2、10%甘油、5μM血红素),4℃静置透析24h,5μM血红素孵育12h。多功能过氧化物酶蛋白复性胶图(如图1所示),酶活达10.14U/mL,蛋白浓度为0.29mg/mL,比酶活力为34.97U/mg。
实施例5多功能过氧化物酶的酶学性质
1、最适反应温度
如酶活测定体系,取0.93mL 50mmol·L-1的苹果酸缓冲液(pH 4.5)至0.5cm石英比色皿中,加入50uL待测稀释样品和1.0mmol·L-1的MnSO2溶液,将混合液分别置于25、30、40、50、60℃水浴中预热5min后,加入0.1mmol·L-1的H2O2溶液启动反应,摇匀后立即放入可见分光光度计中,在吸收波长240nm处测A值,每隔5秒钟记录一次A值,反应时间为1分钟。将酶活最高的组别记为100%酶活,计算各个温度下多功能过氧化物酶的相对酶活(检测结果见图2A),结果显示,多功能过氧化物酶在70℃的酶活力可达18.44U/mL,在60~70℃的相对酶活保持在90%以上。
2、最适反应pH
取0.93mL 50mmol·L-1的苹果酸缓冲液缓冲液(pH分别为3.0、3.5、4.5、5.5、6.5)至0.5cm石英比色皿中,加入50uL待测稀释样品和1.0mmol·L-1的MnSO2溶液,将混合液置于30℃水浴中预热5min后,然后加入0.1mmol·L-1的H2O2启动反应,摇匀后立即放入可见分光光度计中,在吸收波长240nm处测A值,每隔5秒钟记录一次A值,反应时间为1分钟。以酶活最高的为100%,计算各个pH下多功能过氧化物酶的相对酶活(检测结果见图2B)。结果显示,多功能过氧化物酶在pH 4.5时显示出最高酶活力,在pH 4.5~6.5的范围内相对酶活保持在80%以上。
3、温度稳定性
取0.93mL 50mmol·L-1的苹果酸缓冲液(pH 4.5)至0.5cm石英比色皿中,加入50uL待测稀释样品和1.0mmol·L-1的MnSO2溶液,将混合液分别置于30、40、50、60、70℃水浴中,分别测定不同温度条件下多功能过氧化物酶在12、24、36、48、60h的酶活。加入10uL H2O2启动反应,摇匀后立即放入可见分光光度计中,在吸收波长240nm处测A值,每隔5秒钟记录一次A值,反应时间为1分钟。以酶活最高的为100%,计算各个温度下多功能过氧化物酶的酶活稳定性(检测结果见图2C),结果显示,多功能过氧化物酶在30℃条件下,24h PEvp的残留Mn2+活性为71.47%,半衰期在48-60h之间,60h的相对酶活为44%左右;在40℃半衰期在24h左右,低于40℃后的半衰期接近甚至低于12h。
实施例6建立用于紫外预处理的聚乙烯薄膜(UVPE)降解的反应体系
取购买的PE薄膜,裁剪成30cm×30cm的规格,固定在紫外老化箱(艾斯瑞仪器科技有限公司,中国)的辐照隔层中,在T=70℃,于UV辐射强度为100-250V的条件下进行预处理。为了保证紫外照射的均一性,每隔24h对聚乙烯薄膜进行翻面处理;取外辐照8d的聚乙烯薄膜进行留样,作为经紫外预处理的聚乙烯薄膜(UVPE)。
将刺芹侧耳(Pleurotus eryngii)来源的多功能过氧化物酶加入含有尺寸为2cm×2cm,质量约100mg的紫外处理聚乙烯薄膜(UVPE)、2-6mM MnSO4、pH 4.5、浓度为50-100mM的苹果酸缓冲液中,添加0.2-0.6mM H2O2启动酶解反应72h。
实施例7紫外预处理的聚乙烯薄膜(UVPE)的降解
取购买的PE薄膜,裁剪成30cm×30cm的规格,固定在紫外老化箱(艾斯瑞仪器科技有限公司,中国)的辐照隔层中,在T=70℃,于UV辐射强度为200V的条件下进行预处理。为了保证紫外照射的均一性,每隔24h对聚乙烯薄膜进行翻面处理;取紫外辐照8d的聚乙烯薄膜进行留样,作为经紫外预处理的聚乙烯薄膜(UVPE)。
将刺芹侧耳(Pleurotus eryngii)来源的多功能过氧化物酶加入含紫外辐照8d的尺寸为2cm×2cm,厚度20μm、质量约100mg的紫外处理聚乙烯薄膜(UVPE8)、4mM MnSO4、pH4.5、75mM的苹果酸缓冲液中,添加0.2mM H2O2启动酶解反应,初始加酶量为1U/mL(相当于0.1U/mg聚乙烯薄膜,酶蛋白终浓度为0.06mg/mL反应体系),反应体系共10mL,在30℃,200rpm条件下反应72h,反应过程中每隔24h补加终浓度1U/mL的酶量,每隔12h补加H2O2水溶液使其终浓度为0.1mM。
UVPE-对照组:实验步骤与上述操作一致,区别在于,用相同体积的苹果酸缓冲液代替酶液。
UVPE组:仅对聚乙烯薄膜按照上述方法进行紫外预处理,不进行任何酶解孵育操作。
酶解反应结束后,使用尼龙滤布过滤出反应后的膜片,回收滤液。依次用2%SDS(v/v)、去离子水、50%乙醇分别超声清洗两遍以除去薄膜表面的蛋白等杂质,每次30min。结束漂洗后将膜片包入称量纸内放置在60℃的烘箱进行烘干。烘干后的PE材料进行扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)、亲水角(Contact Angle)的检测。
检测经多功能过氧化物酶处理后的紫外预处理聚乙烯薄膜(UVPE)的表面微观结构可知,UVPE表面变得粗糙不平,出现斑点和坑洼,UVPE-对照组除了表面出现一些物理的划痕外,无裂痕和空洞现象。SEM检测结果见图3示。
FTIR检测结果见图4所示,线条从上往下,分别代表原始UVPE、UVPE-对照、UVPE-实验。在多功能过氧化物酶的酶解作用下,多功能过氧化物酶处理的UVPE薄膜的羧基、醛基等官能团明显增加,该官能团的变化在一定程度上证明了多功能过氧化物酶对UVPE的生物降解效果。
GC-MS分析有助于确定特定的产物类型,并为阐明络合体系作用UVPE的具体过程和途径提供重要信息。GC/MS检测结果见图5所示,UVPE-实验组的酶解反应液中生成了C4-C14的酮类、醛类和醇类物质,辛醛、壬醛、庚醛、十三醛含量最为丰富。由于实验所用的PE薄膜中存在少量的短枝甲基,GC-MS检测到的醛类和酮类可能是UVPE分子中的C=C氧化断裂的产物,分别产生醛类[CH3(CH2)nCOH]和酮类[CH3(CH2)nCOCH3]化合物。PEvp介导的Mn(III)-有机酸络合体系可能会引发UVPE分子的自由基反应,通过电子的转移及键能的降低,导致C-C键的断裂,引发一系列醛、酮类物质产生,实现UVPE的氧化降解。UVPE-实验组的酶解产物中,醛类物质含量最多,约占总产物的80%,酮类和醇类所占比例较小。
亲水角检测结果见图6所示,在多功能过氧化物酶的酶解作用下,UVPE薄膜亲水角降低26.8゜。UVPE酶解的亲水角分析表明:多功能过氧化物酶改变了UVPE表面的亲水性,UVPE的亲水性能得到加强。
对比例1:
具体实施方式同实施例7,区别在于,将pH 4.5 75mM的苹果酸缓冲液分别替换为浓度为75mM的柠檬酸、丁二酸、草酸、酒石酸、乙酸,结果显示(图7),替换缓冲液后的多功能过氧化物酶相对酶活均低于苹果酸缓冲液体系相对酶活的50%。
对比例2:
具体实施方式同实施例7,区别在于,将苹果酸缓冲液浓度调整为10-100mM,结果显示(图8),Pevp活性在苹果酸缓冲液浓度为25~100mM时相对酶活达90%以上。
对比例3:
具体实施方式同实施例7,区别在于,将H2O2浓度调整为0-0.6mM,结果显示(图9),Pevp活性在H2O2浓度为0.1~0.6mM时相对酶活达82%以上。
对比例4:
具体实施方式同实施例7,区别在于,将Mn2+浓度调整为0-6mM,结果显示Pevp活性在Mn2+浓度为2-6mM时相对酶活达90%以上。
对比例5:
具体实施方式同实施例7,区别在于,将UV辐照时间调整为4d,结果显示,处理4d的PE薄膜(UVPE4)表面呈现不同程度的雾化及表面产生破碎现象,物理强度大幅度下降。经PEvp酶解后的UV处理4d的薄膜表面凹凸不平出现一定的刻蚀现象;而实施例6紫外预处理8d的薄膜,产生了更多的氧化官能团。
按照相同的方法利用PEvp对UVPE4进行酶降解,其降解产物GC-MS分析结果如图11所示,PEvp-UVPE4实验组的酶解反应液中同样生成了C4-C14的酮类、醛类和醇类物质,其中辛醛、壬醛、庚醛含量最为丰富。出现了明显的羰基吸收带(1600-1700cm-1),包括酮羰基(C=O)、醛羰基(-CHO)和羧基(-COOH)。但其产物丰度和产物类型中醛类和酮类产物比例均低于PEvp-UVPE8实验组,表明Pevp对UVPE8氧化降解效果更为显著。
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> 一种多功能过氧化物酶在聚乙烯降解中的应用
<130> GBAA220718B
<160> 2
<170> PatentIn version 3.3
<210> 1
<211> 1010
<212> DNA
<213> 人工序列
<400> 1
gaattcgcga cctgcgatga tggccgcacc accgcgaacg cggcgtgctg cattctgttt 60
ccgattctgg atgatattca agaaaacctg tttgatggcg cgcagtgcgg cgaagaagtg 120
catgaaagcc tgcgcctgac ctttcatgat gcgattggct tcagcccgac cctgggcggc 180
ggcggcgcgg atggcagcat tattgcgttt gataccattg aaaccaactt tccggcgaac 240
gcgggcattg atgaaattgt gagcgcgcag aaaccgtttg tggcgaaaca taacattagc 300
gcgggcgatt ttattcagtt tgcgggcgcg gtgggcgtga gcaactgccc gggcggcgtg 360
cgcattccgt tttttctggg ccgcccggat gcggtggcgg cgagcccgga tcatctggtg 420
ccggaacctt ttgacagcgt agacagcatt ctggcgcgca tgggcgatgc tggctttagc 480
ccggtggaag tggtgtggct gctggcgagc catagcattg cggcggcgga taaagtggat 540
ccgagcattc cgggcacccc gtttgatagc acgcccggcg tgtttgatag tcagtttttt 600
attgaaacgc agctgaaagg ccgcctgttt ccgggcaccg cggataacaa aggcgaagcg 660
cagagcccgc tgcaaggcga aattcgcctg cagagcgatc atctgctggc gcgcgatccg 720
cagaccgcgt gcgaatggca gagcatggtg aacaatcagc cgaaaattca gaaccgcttt 780
gcggcgacca tgagcaaaat ggcgctgctg ggccaagata aaaccaaact gattgattgc 840
agcgatgtca ttcccactcc gccggcgctg gtgggcgcgg cacatctgcc ggccggcttt 900
agcctgtcgg atgtagagca agcctgcgcc gccaccccct ttccggcgct gacggcagac 960
cccggtccgg tgacgagcgt gccgccggtg ccgggcagct aagcggccgc 1010
<210> 2
<211> 361
<212> PRT
<213> Pleurotus eryngii
<400> 2
Met Ser Phe Lys Thr Leu Ser Ala Leu Ala Leu Ala Leu Gly Ala Ala
1 5 10 15
Val Gln Phe Ala Ser Ala Ala Val Pro Leu Val Gln Lys Arg Ala Thr
20 25 30
Cys Asp Asp Gly Arg Thr Thr Ala Asn Ala Ala Cys Cys Ile Leu Phe
35 40 45
Pro Ile Leu Asp Asp Ile Gln Glu Asn Leu Phe Asp Gly Ala Gln Cys
50 55 60
Gly Glu Glu Val His Glu Ser Leu Arg Leu Thr Phe His Asp Ala Ile
65 70 75 80
Gly Phe Ser Pro Thr Leu Gly Gly Gly Gly Ala Asp Gly Ser Ile Ile
85 90 95
Ala Phe Asp Thr Ile Glu Thr Asn Phe Pro Ala Asn Ala Gly Ile Asp
100 105 110
Glu Ile Val Ser Ala Gln Lys Pro Phe Val Ala Lys His Asn Ile Ser
115 120 125
Ala Gly Asp Phe Ile Gln Phe Ala Gly Ala Val Gly Val Ser Asn Cys
130 135 140
Pro Gly Gly Val Arg Ile Pro Phe Phe Leu Gly Arg Pro Asp Ala Val
145 150 155 160
Ala Ala Ser Pro Asp His Leu Val Pro Glu Pro Phe Asp Ser Val Asp
165 170 175
Ser Ile Leu Ala Arg Met Gly Asp Ala Gly Phe Ser Pro Val Glu Val
180 185 190
Val Trp Leu Leu Ala Ser His Ser Ile Ala Ala Ala Asp Lys Val Asp
195 200 205
Pro Ser Ile Pro Gly Thr Pro Phe Asp Ser Thr Pro Gly Val Phe Asp
210 215 220
Ser Gln Phe Phe Ile Glu Thr Gln Leu Lys Gly Arg Leu Phe Pro Gly
225 230 235 240
Thr Ala Asp Asn Lys Gly Glu Ala Gln Ser Pro Leu Gln Gly Glu Ile
245 250 255
Arg Leu Gln Ser Asp His Leu Leu Ala Arg Asp Pro Gln Thr Ala Cys
260 265 270
Glu Trp Gln Ser Met Val Asn Asn Gln Pro Lys Ile Gln Asn Arg Phe
275 280 285
Ala Ala Thr Met Ser Lys Met Ala Leu Leu Gly Gln Asp Lys Thr Lys
290 295 300
Leu Ile Asp Cys Ser Asp Val Ile Pro Thr Pro Pro Ala Leu Val Gly
305 310 315 320
Ala Ala His Leu Pro Ala Gly Phe Ser Leu Ser Asp Val Glu Gln Ala
325 330 335
Cys Ala Ala Thr Pro Phe Pro Ala Leu Thr Ala Asp Pro Gly Pro Val
340 345 350
Thr Ser Val Pro Pro Val Pro Gly Ser
355 360
Claims (8)
1.一种降解含聚乙烯的塑料产品的方法,其特征在于,包括步骤(a)、(b):
(a)将含聚乙烯的塑料产品进行紫外辐照处理;
(b)将步骤(a)处理后的含聚乙烯的塑料产品与多功能过氧化物酶在溶液环境中接触,并发生酶解反应;所述多功能过氧化物酶含有SEQ ID NO.2所示的氨基酸序列;
步骤(b)的反应体系中多功能过氧化物酶的作用剂量≥0.1 U/mg塑料产品;
所述酶解反应的温度≥30℃、反应体系pH为4.5~5.5。
2.根据权利要求1所述的方法,其特征在于,所述酶解反应在苹果酸-苹果酸钠缓冲液中进行。
3.根据权利要求1或2所述的方法,其特征在于,所述多功能过氧化物酶由微生物发酵制得。
4.根据权利要求3所述的方法,其特征在于,所述多功能过氧化物酶的制备方法包括:
(1)将SEQ ID NO.1所示的PEvp基因与pET载体连接,并转化至大肠杆菌中,获得重组大肠杆菌;
(2)将步骤(1)构建的重组大肠杆菌在适宜的温度下培养,收集培养物中的多功能过氧化物酶。
5.根据权利要求4所述的方法,其特征在于,所述多功能过氧化物酶还经过变性、复性处理。
6.权利要求1~5任一所述的方法在聚乙烯塑料产品降解方面的应用。
7.核苷酸序列如SEQ ID NO.1所示的多功能过氧化物酶的基因,含有所述多功能过氧化物酶的基因的重组质粒,或携带所述多功能过氧化物酶的基因的微生物细胞在聚乙烯塑料产品降解方面的应用,其特征在于,所述多功能过氧化物酶的氨基酸序列如SEQ ID NO.2所示。
8.氨基酸序列如SEQ ID NO.2所示的多功能过氧化物酶在降解聚乙烯或含聚乙烯的塑料中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210692907.3A CN114888054B (zh) | 2022-06-17 | 2022-06-17 | 一种多功能过氧化物酶在聚乙烯降解中的应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210692907.3A CN114888054B (zh) | 2022-06-17 | 2022-06-17 | 一种多功能过氧化物酶在聚乙烯降解中的应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114888054A CN114888054A (zh) | 2022-08-12 |
CN114888054B true CN114888054B (zh) | 2023-10-27 |
Family
ID=82728452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210692907.3A Active CN114888054B (zh) | 2022-06-17 | 2022-06-17 | 一种多功能过氧化物酶在聚乙烯降解中的应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114888054B (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103980535A (zh) * | 2014-05-26 | 2014-08-13 | 北京航空航天大学 | 芽孢杆菌胞外漆酶降解聚乙烯的方法 |
WO2021183867A1 (en) * | 2020-03-13 | 2021-09-16 | Zymergen Inc. | Methods for enzymatic and microbial degradation of polyethylene |
CN113683813A (zh) * | 2021-08-18 | 2021-11-23 | 江南大学 | 染料脱色过氧化物酶在聚苯乙烯降解中的应用 |
CN113897378A (zh) * | 2021-08-20 | 2022-01-07 | 江南大学 | 一种白腐真菌锰过氧化物酶在聚乙烯降解中的应用 |
CN114425136A (zh) * | 2022-01-11 | 2022-05-03 | 江南大学 | 一种过氧化物及角质酶联合处理聚乙烯的方法 |
-
2022
- 2022-06-17 CN CN202210692907.3A patent/CN114888054B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103980535A (zh) * | 2014-05-26 | 2014-08-13 | 北京航空航天大学 | 芽孢杆菌胞外漆酶降解聚乙烯的方法 |
WO2021183867A1 (en) * | 2020-03-13 | 2021-09-16 | Zymergen Inc. | Methods for enzymatic and microbial degradation of polyethylene |
CN113683813A (zh) * | 2021-08-18 | 2021-11-23 | 江南大学 | 染料脱色过氧化物酶在聚苯乙烯降解中的应用 |
CN113897378A (zh) * | 2021-08-20 | 2022-01-07 | 江南大学 | 一种白腐真菌锰过氧化物酶在聚乙烯降解中的应用 |
CN114425136A (zh) * | 2022-01-11 | 2022-05-03 | 江南大学 | 一种过氧化物及角质酶联合处理聚乙烯的方法 |
Non-Patent Citations (3)
Title |
---|
AltName:Full=Versatile liquid Phase Peroxidase 2 * |
Flags:Precursor.《NCBI登录号O94753.1》.2021,全文. * |
RecName:Full=Versatile Peroxidase VPL2 * |
Also Published As
Publication number | Publication date |
---|---|
CN114888054A (zh) | 2022-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Sakai et al. | Biodegradation of cellulose acetate by Neisseria sicca | |
CN113897378B (zh) | 一种白腐真菌锰过氧化物酶在聚乙烯降解中的应用 | |
CN115768902A (zh) | 用katg酶酶促降解聚烯烃聚合物塑料 | |
Zdarta et al. | The response surface methodology for optimization of tyrosinase immobilization onto electrospun polycaprolactone–chitosan fibers for use in bisphenol A removal | |
CN113683813B (zh) | 染料脱色过氧化物酶在聚苯乙烯降解中的应用 | |
CN113698742B (zh) | 一种聚对苯二甲酸乙二醇酯的改性方法及其在酶解过程中的应用 | |
CN114425136B (zh) | 一种过氧化物及角质酶联合处理聚乙烯的方法 | |
Yokoi et al. | Simultaneous production of hydrogen and bioflocculant by Enterobacter sp. BY-29 | |
CN115011580B (zh) | 角质酶突变体及其在聚对苯二甲酸乙二醇酯降解中的应用 | |
CN114908024B (zh) | 一种促进白腐真菌定向产酶降解塑料污染物的方法 | |
CN114888054B (zh) | 一种多功能过氧化物酶在聚乙烯降解中的应用 | |
Zhang et al. | Improving properties of silk sericin membranes via enzymatic oxidation with laccase and TEMPO | |
Jang et al. | Enhancing biodegradation of PBAT through bio-stimulation using Pseudozyma jejuensis for effective plastic waste reduction | |
CN114616327B (zh) | 甲醛转化突变蛋白及其应用 | |
CN117821419A (zh) | 双烯内酯酶突变体及其应用 | |
CN116926041A (zh) | Pet聚酯塑料解聚酶突变体及其应用 | |
Silva et al. | Enzymatic hydrolysis and modification of core polymer fibres for textile and other applications | |
Wang et al. | Influence of carbon source on the production of extracellular ligninolytic enzymes by Phanerochaete chrysosporium | |
CN115044510B (zh) | 菌酶联合体及其在聚对苯二甲酸乙二醇酯塑料降解中的应用 | |
CN114874490B (zh) | 一种聚苯乙烯预处理及酶降解的方法 | |
CN118373880B (zh) | 一种纳米纤维肽、纳米纤维肽-氧化石墨烯复合模拟酶及其应用 | |
CN117903493A (zh) | 一种橡胶氧化酶联合处理聚氯乙烯的方法 | |
CN112940963B (zh) | 脱乙酰酶DacApva、编码基因及其在脱乙酰反应中的应用 | |
CN118126968A (zh) | 一组可降解聚乙烯塑料的祖先漆酶 | |
CN116063734A (zh) | 漆酶介体体系在聚乙烯降解中的应用 |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |