JPH04211385A - Production of l-malic acid polymer by microorganism - Google Patents
Production of l-malic acid polymer by microorganismInfo
- Publication number
- JPH04211385A JPH04211385A JP3055624A JP5562491A JPH04211385A JP H04211385 A JPH04211385 A JP H04211385A JP 3055624 A JP3055624 A JP 3055624A JP 5562491 A JP5562491 A JP 5562491A JP H04211385 A JPH04211385 A JP H04211385A
- Authority
- JP
- Japan
- Prior art keywords
- malic acid
- acid polymer
- culture
- ifo
- production
- 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.)
- Granted
Links
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 title claims abstract description 26
- 229920000642 polymer Polymers 0.000 title claims abstract description 13
- 229940116298 l- malic acid Drugs 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 244000005700 microbiome Species 0.000 title description 9
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000011090 malic acid Nutrition 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- 229940099690 malic acid Drugs 0.000 claims description 4
- 239000001630 malic acid Substances 0.000 claims description 4
- 241000223651 Aureobasidium Species 0.000 abstract description 3
- 241000233866 Fungi Species 0.000 abstract description 3
- 241000879125 Aureobasidium sp. Species 0.000 abstract description 2
- 239000002609 medium Substances 0.000 description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 229920001817 Agar Polymers 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000008272 agar Substances 0.000 description 6
- 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 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000008103 glucose Substances 0.000 description 5
- 230000012010 growth Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 241000307611 Aureobasidium mansonii Species 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 229920001218 Pullulan Polymers 0.000 description 3
- 229910052799 carbon Inorganic materials 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
- 150000007524 organic acids Chemical class 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 235000019423 pullulan Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 241001480003 Chaetothyriales Species 0.000 description 2
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 241000222059 Kabatiella microsticta Species 0.000 description 2
- 241001507683 Penicillium aurantiogriseum Species 0.000 description 2
- 244000061456 Solanum tuberosum Species 0.000 description 2
- 235000002595 Solanum tuberosum Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 2
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229940041514 candida albicans extract Drugs 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000012136 culture method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 235000013343 vitamin Nutrition 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 239000011782 vitamin Substances 0.000 description 2
- 239000012138 yeast extract Substances 0.000 description 2
- HDTRYLNUVZCQOY-UHFFFAOYSA-N α-D-glucopyranosyl-α-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OC1C(O)C(O)C(O)C(CO)O1 HDTRYLNUVZCQOY-UHFFFAOYSA-N 0.000 description 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- WQZGKKKJIJFFOK-QTVWNMPRSA-N D-mannopyranose Chemical compound OC[C@H]1OC(O)[C@@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-QTVWNMPRSA-N 0.000 description 1
- ODBLHEXUDAPZAU-ZAFYKAAXSA-N D-threo-isocitric acid Chemical compound OC(=O)[C@H](O)[C@@H](C(O)=O)CC(O)=O ODBLHEXUDAPZAU-ZAFYKAAXSA-N 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- ODBLHEXUDAPZAU-FONMRSAGSA-N Isocitric acid Natural products OC(=O)[C@@H](O)[C@H](C(O)=O)CC(O)=O ODBLHEXUDAPZAU-FONMRSAGSA-N 0.000 description 1
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000228143 Penicillium Species 0.000 description 1
- 239000001888 Peptone Substances 0.000 description 1
- 108010080698 Peptones Proteins 0.000 description 1
- CVBNMWXECPZOLM-UHFFFAOYSA-N Rhamnetin Natural products COc1cc(O)c2C(=O)C(=C(Oc2c1)c3ccc(O)c(O)c3O)O CVBNMWXECPZOLM-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- HDTRYLNUVZCQOY-WSWWMNSNSA-N Trehalose Natural products O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-WSWWMNSNSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009603 aerobic growth Effects 0.000 description 1
- HDTRYLNUVZCQOY-LIZSDCNHSA-N alpha,alpha-trehalose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-LIZSDCNHSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 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
- 238000004458 analytical method Methods 0.000 description 1
- PYMYPHUHKUWMLA-WDCZJNDASA-N arabinose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)C=O PYMYPHUHKUWMLA-WDCZJNDASA-N 0.000 description 1
- 239000002473 artificial blood Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- NHJPVZLSLOHJDM-UHFFFAOYSA-N azane;butanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCC([O-])=O NHJPVZLSLOHJDM-UHFFFAOYSA-N 0.000 description 1
- AGYZCBIYODIDEY-UHFFFAOYSA-N benzyl 4-oxooxetane-2-carboxylate Chemical compound C1C(=O)OC1C(=O)OCC1=CC=CC=C1 AGYZCBIYODIDEY-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 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
- 159000000007 calcium salts Chemical class 0.000 description 1
- TWFZGCMQGLPBSX-UHFFFAOYSA-N carbendazim Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1 TWFZGCMQGLPBSX-UHFFFAOYSA-N 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000006783 corn meal agar Substances 0.000 description 1
- 238000000354 decomposition reaction 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
- 238000012377 drug delivery Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- MNQZXJOMYWMBOU-UHFFFAOYSA-N glyceraldehyde Chemical compound OCC(O)C=O MNQZXJOMYWMBOU-UHFFFAOYSA-N 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
- 229940049920 malate Drugs 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 monomethyl ester Chemical class 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000004816 paper chromatography Methods 0.000 description 1
- 235000019319 peptone Nutrition 0.000 description 1
- 239000008363 phosphate buffer 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
- 230000001766 physiological effect Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000013630 prepared media Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- ODBLHEXUDAPZAU-UHFFFAOYSA-N threo-D-isocitric acid Natural products OC(=O)C(O)C(C(O)=O)CC(O)=O ODBLHEXUDAPZAU-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 150000003722 vitamin derivatives Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は、微生物によるL−リン
ゴ酸重合物(poly−L−Malic acid,
以下PMLAと称する)の製造法に関する。
【0002】PMLAは、生体内分解吸収性高分子化合
物として、生体吸収性縫合系、骨接合用材料、人工腱、
人工血管及びドラッグデリバリーの高分子キャリアー等
として、医薬及び医療の分野での用途が大いに期待され
ている。
【0003】
【従来の技術】PMLAは、リンゴ酸モノベンジル又は
モノメチルエステルを原料とする化学合成法[Repo
rts of the Faculty Engine
ering, Tottori University
, 8, 124 (1977) ]、ベンジルマロラ
クトネートを開環重合させる化学合成法[米国特許第4
265247号明細書]、直接熱縮合法[高分子論文集
、44、 701 (1987)]等の化学合成法によ
る製造法が報告されている。
【0004】また、微生物を用いたPMLAの製造では
、ペニシリウム・サイクロピウム (Penicill
ium cyclopium)を用いた固体培養による
製造例[Agricultural Biologic
al Chemistry 33 (4), 459
(1969)]が報告されている。
【0005】
【発明が解決しようとする課題】しかしながら、化学合
成法による製造では原料が高価であるばかりか、多数の
工程を必要とするため収率が低いという欠点を有してい
る。
【0006】一方、前記したペニシリウム・サイクロピ
ウムを用いた固体培養法による製造では、収率が低く、
また精製に多工程を要するため実際的な方法とは言い難
い。従って、従来より安価な原料から高収量で製造する
方法の開発が望まれていた。
【0007】
【課題を解決するための手段】本発明は、オウレオバセ
ディウム属に属するPMLA産生菌を培養し、培養物よ
りPMLAを採取することを特徴とするPMLAの製造
法である。
【0008】オウレオバセディウム(Aureobas
idium) 属に属する微生物には、従来プルラリア
(Pullularia)属に分類され、後にオウレオ
バセディウム属に再分類された微生物も含まれ、総括的
に黒色酵母(black yeast) とも言われて
いる[Mycopathologia et Myco
logia Applicata, 12, 1 (1
959), 同 17, 1 (1962) ]。従
って、PMLAを産生し得る黒色酵母であれば、これら
をも本発明の範囲に含むものである。そのような微生物
の具体例としては、例えば以下のものが挙げられる。
【0009】オウレオバセディウム・プルランス(Au
reobasidium pullulans) IF
O 4464、同IFO 4465、同IFO
4875、同IFO 7757、同ATCC 73
05、オウレオバセディウム・マンソニー(Aureo
basidium mansonii)IFO 64
21、同IFO 8194、同IFO 9233、
同ATCC 14249、オウレオバセディウム・ミ
クロスティクタム(Aureobasidium mi
crostictum)IFO 32066、同IF
O 32067、同IFO 32068、同IFO
32069、オウレオバセデイウム(Aureob
asidium) ・Sp.A−91株及びこれらの変
異株を含むものである。
【0010】上記菌株の中でオウレオバセデイウム・S
p.A−91株は、本発明者によって土壌中から新たに
分離された菌株であり、その菌学的性状は次のとおりで
ある。
A.培地上の生育状況
a)顕微鏡的所見(YM寒天培地で25℃、5日間培養
後)
栄養細胞の大きさ:3〜6×3〜20μm 栄養細胞の
形状 :菌系及び酵母様の単胞、卵形等の形状を示す
b)寒天斜面(ポテトグルコース寒天培地)生育:良好
光沢:無し
色調:3日以上培養すると白色クリーム状から暗色、黒
色のコロニーとなる。
c)液体培養
YM液体培地:生育良好
B.子のう胞子の形成
ポテトグルコース寒天培地:形成せず
コーンミール寒天培地 :形成せずYM寒天培地
:形成せずV8 寒天培地
:形成せずC.生理学的性質
酸素要求性:好気的
生育温度 :5〜35℃
生育pH :2〜9
KNO3 の利用性(Wickerham 合成培地)
:有り(NH4 )2 SO4 の利用性(Wicke
rham 合成培地):有り
尿素の分解:有り
ゼラチンの液化:無し
有機酸の生成:有り
ビタミンの要求性(Wickerham 合成培地):
無しD.資化可能な炭素源(Wickerham 合成
培地)グルコース、シュークロース、マルトース、アラ
ビノース、キシロース、マンノース、フラクトース、ト
レハロース、グリセロース、マンニトール、デンプン、
エタノール、クエン酸、イソクエン酸、コハク酸、DL
−リンゴ酸、フマル酸。
【0011】上記の菌学的性質を有する本菌株の分類学
上の位置を“The Genera of Fungi
Sporulating in pure cultu
re ”(第3版)J.A. Von Arx編 Lu
brecht & cramer社刊(1981)によ
り検討した結果、オウレオバセディウム属に属する新菌
株であることが判明し、これをオウレオバセディウム・
Sp.A−91株と命名した。
【0012】本菌株は、工業技術院微生物工業技術研究
所に「微生物受託番号 微工研菌寄第P−11966
号」として寄託されている。
【0013】以下に、本発明のL−リンゴ酸重合物製造
方法について述べる。
【0014】上記のオウレオバセディウム属菌を培養す
るには、通常の方法に従い、炭素源、窒素源、無機塩等
の栄養分を含む培地を用いて行うことができる。
【0015】培地の炭素源としては、例えば糖質原料と
くにグルコースが好適に用いられ、その添加濃度は1〜
30重量%、好ましくは1〜20重量%が適当である。
窒素源としては、微生物の培養に際して通常使用される
窒素含有の有機又は無機物質、例えば、アンモニア、硫
酸アンモニウム、塩化アンモニウム、硝酸アンモニウム
、コハク酸アンモニウムなどの有機酸アンモニウム塩、
尿素等を単独もしくは混合して用いることができ、また
、無機塩としては、例えば、リン酸−水素カリウム、リ
ン酸二水素カリウム、硫酸マグネシウム等を用いること
ができる。この他に菌の生育に必要であれば、酵母エキ
ス、コーンスティープリカー、ペプトン、肉エキス、カ
ザミノ酸、各種ビタミン等の栄養素を培地に添加し用い
ることができる。
【0016】培養は振盪、通気撹拌等の好気的条件下で
行われ、培養温度は一般に20〜40℃、好ましくは2
2〜35℃が好適である。培養pHは2〜10、好まし
くは、3〜9、さらに好ましくは、3〜7である。
【0017】培養期間は、特に制限されるものではない
が、通常1日〜10日間で行われる。
【0018】以上述べた培養法により培養液中に生成す
るPMLAの培養液からの分離・精製は、それ自体既知
の方法に従い、例えば、イオン交換樹脂処理法、沈澱法
例えば、アセトン、メタノール、エタノール、n−プロ
パノール、イソプロパノール、メチルエチルケトン等の
有機溶媒沈澱法等を適宜組合わせて行うことができる。
【0019】以上に述べた方法で製造されるPMLAの
物理化学的性質は、以下のとおりである。
(1)GPC法により測定した分子量は、約2,000
〜50,000の範囲内である。
(2)1N硫酸溶液による加水分解処理により、L−リ
ンゴ酸のみが生成する。
【0020】
【発明の効果】本発明によれば、オウレオバセディウム
属に属するPMLA産生菌を培養して、高い生成量でP
MLAを得ることができる。
【0021】
【実施例】次に実施例を挙げて本発明をさらに具体的に
説明する。しかしながら、下記の実施例は本発明につい
て具体的な認識を得る一助としてのみ挙げたものであり
、これによって本発明は何ら限定されるものではない。
【0022】
実施例1
培地(グルコース12%、KH2 PO4 0.05%
、MgSO4 ・7H2 O0.05%、酵母エキス0
.02%;pH無調整)50mlを500ml容三角フ
ラスコに分注し、滅菌(121℃、15分間)した後、
別に滅菌した6%硝酸アンモニウム溶液1mlを添加し
た。培養は、該調製培地に炭酸カルシウム1g を添加
後、第1表に示した微生物を植菌し、25℃にて3日間
振盪培養を行い、これを前培養物とした。本培養は上記
培地2,000mlを5,000ml容三角フラスコに
分注、滅菌(121℃、15分間)した後、別に滅菌し
た6%硝酸アンモニウムの40mlと乾熱滅菌した炭酸
カルシウム60g を添加後、前培養物の2(v/v)
%を添加して25℃にて8日間振盪培養を行った。
【0023】培養終了後、培養物の200mlを遠心分
離(8,000rpm 、15分間、室温)後、得られ
た上清液の100mlにメタノール200mlを徐々に
添加すると生成物が析出沈澱した。該沈澱物を遠心分離
(8,000rpm 、10分間、4℃)にて分離し、
メタノール−水(2:1)の混液で洗浄した後、減圧下
デシケーター中で乾燥させ、秤量した。結果を表1に示
した。
【0024】
表1 ────────
───────────────────────
*
○
菌株名
生成量 (mg
) ─────────
──────────────────────
Aureobasidiu
m pullulans
IFO
4464 50
IFO 7757
4200
IFO 4
875 500
──────────
─────────────────────
Aureobasidium
mansonii
IFO 6
421 150
IF
O 9233
3800
ATCC 14249
50
─────────────
──────────────────
Aureobasidium
microstictum
IFO 32066
920
IFO
32068
450
IFO 32069
1200
──────────────────
─────────────
Aureobasidium SP.A−
91 8300
────────────────
───────────────
○
* 生
成物はカルシウム塩として秤量
【002
5】
実施例2
実施例1の回収した生成物について、分子量の測定はG
PC法(カラム:TSK gel G3000 PW
XL 、移動相:0.05M リン酸緩衝液(pH7.
0)、25℃、検出機:UV(210nm)及び RI
)により分析した結果、菌株及び培養条件により分子
量は異なり、2,000〜50,000であった。
【0026】生成物の50mgを1N H2 SO4
溶液10mlに溶解後、該液を100℃沸騰水中で3
時間加水分解処理を行った。該処理液をペーパークロマ
トグラフィー(展開溶媒、酢酸エチル:酢酸:水=50
:12:10)により分析した結果、リンゴ酸のRf
値に相当する単一スポットが認められた。更に高速液体
クロマトグラフィー(島津製LC−5A型)により有機
酸の分析を行った結果、リンゴ酸の保持時間を示す単一
ピークが得られた。例えばオウレオバシディウム・マン
ソニー(Aureobasidium mansoni
i)IFO 9233の培養物から回収した生成物に
ついて酸加水分解物の高速液体クロマトグラフィー[カ
ラム:HPX−87H(BIO−RAD),カラム温度
:60℃、溶媒:0.01M H2 SO4 、流速:
0.7ml/分、検出器:UV(210nm)]分析の
結果、標準物質のL−リンゴ酸と同一のリテンションタ
イムを示した。
【0027】また、得られた加水分解物をL−リンゴ酸
測定キット(ベーリンガー・マンハイム製)により分析
した結果L−体であることが判明した。
【0028】以上の結果から、本生成物はL−リンゴ酸
が重合したものであることが判明した。Detailed Description of the Invention [0001] [Industrial Application Field] The present invention is directed to the production of poly-L-malic acid by microorganisms.
The present invention relates to a method for producing PMLA (hereinafter referred to as PMLA). PMLA is a biodegradable and absorbable polymer compound that is used in bioabsorbable suture systems, bone joint materials, artificial tendons,
It is highly expected to be used in the pharmaceutical and medical fields, such as as a polymer carrier for artificial blood vessels and drug delivery. [0003] PMLA is produced by a chemical synthesis method using monobenzyl malate or monomethyl ester as a raw material [Repo
rts of the Faculty Engine
ering, Tottori University
, 8, 124 (1977)], a chemical synthesis method for ring-opening polymerization of benzylmalolactonate [U.S. Pat.
265247], direct thermal condensation method [Kobunshi Ronshu, 44, 701 (1987)], and other chemical synthesis methods have been reported. [0004] Furthermore, in the production of PMLA using microorganisms, Penicillium cyclopium (Penicillium
Example of production by solid culture using Agricultural Biological
al Chemistry 33 (4), 459
(1969)] has been reported. [0005] However, production by chemical synthesis has the disadvantage that not only the raw materials are expensive, but also the yield is low because many steps are required. On the other hand, the production using the solid culture method using Penicillium cyclopium has a low yield;
In addition, it is difficult to say that it is a practical method because it requires multiple steps for purification. Therefore, it has been desired to develop a method for producing in high yield from materials that are cheaper than conventional ones. [0007] The present invention is a method for producing PMLA, which is characterized by culturing PMLA-producing bacteria belonging to the genus Aureobasedium and collecting PMLA from the culture. [0008] Aureobasedium (Aureobasedium)
Microorganisms belonging to the genus Aureobaseium include microorganisms that were previously classified as the genus Pullularia and later reclassified as the genus Aureobaseium, and are also collectively referred to as black yeast. [Mycopathology and Myco
logia Applicata, 12, 1 (1
959), 17, 1 (1962)]. Therefore, any black yeast that can produce PMLA is included within the scope of the present invention. Specific examples of such microorganisms include the following. [0009] Aureobasedium pullulans (Au
reobasidium pullulans) IF
O 4464, IFO 4465, IFO
4875, IFO 7757, ATCC 73
05, Aureobasedium mansoni (Aureo
basidium mansonii) IFO 64
21, IFO 8194, IFO 9233,
ATCC 14249, Aureobasidium microstictum (Aureobasidium mi
crostictum) IFO 32066, same IF
O 32067, IFO 32068, IFO
32069, Aureobaseium (Aureob)
acidium) ・Sp. This includes the A-91 strain and mutant strains thereof. Among the above strains, Aureobaseium S.
p. Strain A-91 is a strain newly isolated from soil by the present inventor, and its mycological properties are as follows. A. Growth status on medium a) Microscopic findings (after culturing on YM agar medium at 25°C for 5 days) Size of vegetative cells: 3-6 x 3-20 μm Shape of vegetative cells: Fungal and yeast-like single cells, b) Agar slant (potato glucose agar medium) Growth: Good Gloss: None Color tone: When cultured for 3 days or more, colonies change from white creamy to dark to black. c) Liquid culture YM liquid medium: Good growth B. Ascospore formation Potato glucose agar medium: No formation Cornmeal agar medium: No formation YM agar medium: No formation V8 agar medium
: No formation C. Physiological properties Oxygen requirement: Aerobic Growth temperature: 5-35°C Growth pH: 2-9 KNO3 utilization (Wickerham synthetic medium)
: Available (NH4)2 SO4 availability (Wicke
rham synthetic medium): Yes Decomposition of urea: Yes Liquefaction of gelatin: None Production of organic acids: Yes Vitamin requirements (Wickerham synthetic medium):
NoneD. Assimilable carbon sources (Wickerham synthetic medium) glucose, sucrose, maltose, arabinose, xylose, mannose, fructose, trehalose, glycerose, mannitol, starch,
Ethanol, citric acid, isocitric acid, succinic acid, DL
-malic acid, fumaric acid. The taxonomic position of this strain having the above-mentioned mycological properties is referred to as "The Genera of Fungi".
Sporulating in pure culture
re” (3rd edition) edited by J.A. Von Arx Lu
As a result of an examination published by Brecht & Cramer (1981), it was found that it was a new strain belonging to the genus Aureobasedium, and it was classified as Aureobasedium.
Sp. It was named strain A-91. [0012] This strain was given to the Institute of Microbial Technology, Agency of Industrial Science and Technology as follows: Microorganism accession number P-11966
It has been deposited as "No." [0013] The method for producing L-malic acid polymer of the present invention will be described below. [0014] The above-mentioned bacteria of the genus Aureobasedium can be cultured according to a conventional method using a medium containing nutrients such as a carbon source, a nitrogen source, and inorganic salts. [0015] As a carbon source for the medium, for example, carbohydrate raw materials, particularly glucose, are suitably used, and the concentration thereof is 1 to 1.
30% by weight, preferably 1-20% by weight is suitable. As a nitrogen source, nitrogen-containing organic or inorganic substances commonly used in culturing microorganisms, such as ammonia, ammonium salts of organic acids such as ammonium sulfate, ammonium chloride, ammonium nitrate, and ammonium succinate;
Urea etc. can be used alone or in combination, and as the inorganic salt, for example, potassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, etc. can be used. In addition, nutrients such as yeast extract, corn steep liquor, peptone, meat extract, casamino acids, and various vitamins can be added to the medium if necessary for the growth of the bacteria. [0016] The culture is carried out under aerobic conditions such as shaking and aeration, and the culture temperature is generally 20 to 40°C, preferably 20°C.
A temperature of 2 to 35°C is suitable. The culture pH is 2-10, preferably 3-9, more preferably 3-7. [0017] The culture period is not particularly limited, but it is usually carried out for 1 to 10 days. PMLA produced in the culture solution by the above-mentioned culture method can be separated and purified from the culture solution by methods known per se, such as ion exchange resin treatment, precipitation, etc., such as acetone, methanol, ethanol, , n-propanol, isopropanol, methyl ethyl ketone, etc. can be carried out in an appropriate combination. The physicochemical properties of PMLA produced by the method described above are as follows. (1) The molecular weight measured by GPC method is approximately 2,000
~50,000. (2) Only L-malic acid is produced by hydrolysis treatment with a 1N sulfuric acid solution. Effects of the Invention According to the present invention, a PMLA-producing bacterium belonging to the genus Aureobasedium is cultured, and P is produced in a high amount.
MLA can be obtained. [Example] Next, the present invention will be explained in more detail with reference to Examples. However, the following examples are given only to help gain a concrete understanding of the present invention, and the present invention is not limited thereby. Example 1 Medium (glucose 12%, KH2 PO4 0.05%
, MgSO4 ・7H2 O0.05%, yeast extract 0
.. After dispensing 50 ml of 02% (no pH adjustment) into a 500 ml Erlenmeyer flask and sterilizing it (121°C, 15 minutes),
1 ml of a separately sterilized 6% ammonium nitrate solution was added. For culturing, 1 g of calcium carbonate was added to the prepared medium, and the microorganisms shown in Table 1 were inoculated, cultured with shaking at 25°C for 3 days, and this was used as a preculture. For the main culture, 2,000 ml of the above medium was dispensed into a 5,000 ml Erlenmeyer flask, sterilized (121°C, 15 minutes), and 40 ml of separately sterilized 6% ammonium nitrate and 60 g of dry heat sterilized calcium carbonate were added. 2 (v/v) of preculture
% and cultured with shaking at 25°C for 8 days. After completion of the culture, 200 ml of the culture was centrifuged (8,000 rpm, 15 minutes, room temperature), and 200 ml of methanol was gradually added to 100 ml of the resulting supernatant, resulting in precipitation of the product. The precipitate was separated by centrifugation (8,000 rpm, 10 minutes, 4°C),
After washing with a mixture of methanol and water (2:1), it was dried in a desiccator under reduced pressure and weighed. The results are shown in Table 1. [0024]
Table 1 ────────
────────────────────────
*
○
Strain name
Production amount (mg
) ─────────
──────────────────────
Aureobasidiu
m pullulans
IFO
4464 50
IFO 7757
4200
IFO 4
875 500
──────────
──────────────────────
Aureobasidium
mansonii
IFO 6
421 150
IF
O9233
3800
ATCC 14249
50
──────────────
────────────────────
Aureobasidium
microstictum
IFO 32066
920
IFO
32068
450
IFO 32069
1200
────────────────────
──────────────
Aureobasidium SP. A-
91 8300
──────────────────
────────────────
○
*Product weighed as calcium salt
002
5] Example 2 Regarding the recovered product of Example 1, the molecular weight was measured by G.
PC method (column: TSK gel G3000 PW
XL, mobile phase: 0.05M phosphate buffer (pH 7.
0), 25°C, detector: UV (210 nm) and RI
), the molecular weight varied depending on the strain and culture conditions, and was 2,000 to 50,000. 50 mg of the product was dissolved in 1N H2SO4.
After dissolving in 10ml of solution, the solution was boiled in 100℃ boiling water for 3 hours.
A time hydrolysis treatment was performed. The treated solution was subjected to paper chromatography (developing solvent, ethyl acetate:acetic acid:water=50
:12:10), the Rf of malic acid was
A single spot corresponding to the value was observed. Furthermore, as a result of analyzing organic acids by high performance liquid chromatography (LC-5A model manufactured by Shimadzu), a single peak indicating the retention time of malic acid was obtained. For example, Aureobasidium mansoni
i) High performance liquid chromatography of the acid hydrolyzate of the product recovered from the culture of IFO 9233 [Column: HPX-87H (BIO-RAD), Column temperature: 60°C, Solvent: 0.01M H2SO4, Flow rate:
0.7 ml/min, detector: UV (210 nm)] Analysis results showed the same retention time as the standard substance L-malic acid. The obtained hydrolyzate was analyzed using an L-malic acid measurement kit (manufactured by Boehringer Mannheim) and was found to be L-malic acid. [0028] From the above results, it was found that this product was a product obtained by polymerizing L-malic acid.
Claims (3)
リンゴ酸重合物産生菌を培養して、培養物よりL−リン
ゴ酸重合物を採取することを特徴とするL−リンゴ酸重
合物の製造法。Claim 1: L- belonging to the genus Aureobasedium
A method for producing an L-malic acid polymer, which comprises culturing malic acid polymer-producing bacteria and collecting the L-malic acid polymer from the culture.
リンゴ酸重合物産生菌が、オウレオバセデイウム・Sp
.A−91株である請求項1記載の方法。Claim 2: L- belonging to the genus Aureobaseium
The malic acid polymer producing bacteria is Aureobaseium Sp.
.. The method according to claim 1, wherein the strain is A-91.
ウレオバセディウム・Sp.A−91株。3. Aureobasedium Sp. having the ability to produce an L-malic acid polymer. A-91 strain.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3055624A JP2971158B2 (en) | 1990-03-02 | 1991-02-28 | Method for producing L-malic acid polymer by microorganism |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2-49401 | 1990-03-02 | ||
JP4940190 | 1990-03-02 | ||
JP3055624A JP2971158B2 (en) | 1990-03-02 | 1991-02-28 | Method for producing L-malic acid polymer by microorganism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04211385A true JPH04211385A (en) | 1992-08-03 |
JP2971158B2 JP2971158B2 (en) | 1999-11-02 |
Family
ID=26389790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3055624A Expired - Fee Related JP2971158B2 (en) | 1990-03-02 | 1991-02-28 | Method for producing L-malic acid polymer by microorganism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2971158B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108893498A (en) * | 2018-07-11 | 2018-11-27 | 天津慧智百川生物工程有限公司 | A kind of fermentation process improving polymalic acid yield |
-
1991
- 1991-02-28 JP JP3055624A patent/JP2971158B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108893498A (en) * | 2018-07-11 | 2018-11-27 | 天津慧智百川生物工程有限公司 | A kind of fermentation process improving polymalic acid yield |
CN108893498B (en) * | 2018-07-11 | 2022-05-06 | 天津慧智百川生物工程有限公司 | Fermentation method for increasing yield of polymalic acid |
Also Published As
Publication number | Publication date |
---|---|
JP2971158B2 (en) | 1999-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3922194A (en) | Process for producing 2-keto-L-gulonic acid | |
JPH0889264A (en) | Production of polyester copolymer | |
JPS6247520B2 (en) | ||
JP2971158B2 (en) | Method for producing L-malic acid polymer by microorganism | |
JPH04341189A (en) | Production of l-malic acid polymer by enzymatic process | |
JPH04341190A (en) | Production of l-malic acid polymer by enzymatic process | |
JPH0632626B2 (en) | Fermentation method for producing L-threonine | |
JPH02275898A (en) | Novel antibiotic substance kt-6291a and kt-6291b, microorganism capable of producing the same, its production and plant disease injury controlling agent | |
JPH07284395A (en) | Production of poly-l-malic acid | |
JP3432621B2 (en) | How to make melanin | |
JPH07308188A (en) | Method for culturing microorganism capable of producing l-malic acid polymer | |
NO802863L (en) | PROCEDURE FOR THE PREPARATION OF 2,5-DICETOGLUCONIC ACID | |
JP2000239266A (en) | New polyene-based antibiotic | |
JPH01174397A (en) | Production of polyglutamic acid | |
JPH04271787A (en) | Production of d-lactic acid and genus pseudomonas bacterium | |
JPH0352884A (en) | Fo-608a substance and production thereof | |
JPH0593A (en) | Production of optically active 3-methyladipic acid | |
JP2868237B2 (en) | Novel bioactive substance OM-6519 and production method thereof | |
JPH05260984A (en) | Production of 3-hydroxybutyric acid and/or its trimer | |
AU600936B2 (en) | New culture medium for bacteria of the bordetella genus containing etherified derivative of d-glucose and a cyclodextrin | |
JPH0523749B2 (en) | ||
JP2519980B2 (en) | Method for producing (S) -2-hydroxy-4-phenyl-3-butenoic acid | |
JP2000078996A (en) | Production of pyruvic acid | |
JPH04360894A (en) | Fo-1513a substance and production thereof | |
JP2004254585A (en) | Method for producing beta-polymalic acid by microorganism |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070827 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080827 Year of fee payment: 9 |
|
LAPS | Cancellation because of no payment of annual fees |