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    • 22. 发明授权
    • Penicillin G acylase immobilized with a crosslinked mixture of gelled
gelatin and amino polymer
    • 用胶凝明胶和氨基聚合物的交联混合物固定的青霉素G酰基转移酶
    • US6060268A
    • 2000-05-09
    • US983370
    • 1998-01-15
    • Erik De Vroom
    • Erik De Vroom
    • C12N11/02C12N11/04C12N11/10C12P37/04C12P35/04
    • C12N11/02C12N11/04C12N11/10
    • Penicillin G acylase is immobilized by covalent bonding to a crosslinked mixture of a gelled gelling agent such as gelatin and a polymer containing free amino groups such as alginate amine, chitosan or polyethylene imine. The immobilized penicillin G acylase provides a higher synthesis/hydrolysis ratio as compared to immobilizing with other carriers when producing .beta.-lactam derivatives by a condensing reaction of an amino .beta.-lactam with an acylating agent. The acylating agent may be a derivative of D-phenylglycine, a derivative of D-p-hydroxyphenylglycine or a derivative of D-2,5-dihydro-phenylglycine. Examples of .beta.-lactam derivatives that can be produced are amoxycillin, ampicillin, cephaclor, cephadroxil, cephprozil, cephalexin and cephradine.
    • PCT No.PCT / EP96 / 03253 Sec。 371日期1998年1月15日 102(e)1998年1月15日PCT PCT 1996年7月16日PCT公布。 出版物WO97 / 04086 日期1997年2月6日青霉素G酰基转移酶通过共价键固定到凝胶化胶凝剂如明胶和含有游离氨基的聚合物如藻酸盐,壳聚糖或聚乙烯亚胺的交联混合物中。 固定化的青霉素G酰基转移酶与通过氨基β-内酰胺与酰化剂的缩合反应制备β-内酰胺衍生物时相比,与其它载体固定相比提供了更高的合成/水解比。 酰化剂可以是D-苯基甘氨酸的衍生物,D-对羟基苯基甘氨酸的衍生物或D-2,5-二氢 - 苯基甘氨酸的衍生物。 可以生产的β-内酰胺衍生物的实例是阿莫西林,氨苄青霉素,cephaclor,cephadroxil,cephprozil,头孢氨苄和头孢拉定。
    • 23. 发明授权
    • Bioprocess for preparing 7-ACA and 7-ADAC
    • 用于制备7-ACA和7-ADAC的生物工艺
    • US5559005A
    • 1996-09-24
    • US250310
    • 1994-05-27
    • Michael J. ConderPhyllis C. McAdaJohn A. RambosekChristopher D. Reeves
    • Michael J. ConderPhyllis C. McAdaJohn A. RambosekChristopher D. Reeves
    • C12N1/19C07D501/20C12N1/15C12N9/00C12N9/02C12N9/10C12N15/09C12N15/52C12N15/54C12P20060101C12P35/00C12P35/06C12P37/04C12R1/82C12P35/04C12N1/16
    • C12N9/0071C12N9/00C12N9/1029C12P35/00C12P37/04Y10S435/935
    • Important intermediates for preparing cephalosporin antibiotics, 7-amino-cephalosporanic acid (7-ACA) and 7-aminodeacetylcephalosporanic acid (7-ADAC), are prepared by a novel bioprocess in which a transformed Penicillium chrysogenum strain is cultured in the presence of an adipate feedstock to produce adipoyl-6-APA (6-amino penicillanic acid); followed by the in situ expression of the following genes with which the P. chrysogenum has been transformed:1) an expandase gene, e.g., from Cephalosporium acremonium, whose expression product converts the adipoyl-6-APA by ring expansion to adipoyl-7-ADCA;2) an hydroxylase gene whose expression product converts the 3-methyl side chain of adipoyl-7-ADCA to 3-hydroxymethyl, to give the first product, 7-aminodeacetylcephalosporanic acid (7-ADAC); and3) an acetyltransferase gene whose expression product converts the 3-hydroxymethyl side chain to the 3-acetyloxymethyl side chain of 7-ACA. The final product, 7-ACA, is then prepared by cleavage of the adipoyl side chain using an adipoyl acylase. The entire synthesis, accordingly, is carried out using bioprocesses, and is efficient and economical.
    • 用于制备头孢菌素抗生素,7-氨基头孢菌素酸(7-ACA)和7-氨基脱乙酰头孢菌酸(7-ADAC)的重要中间体是通过新型生物工艺制备的,其中转化的产黄青霉菌株在己二酸存在下培养 生产己二酰-6-APA(6-氨基青霉烷酸)的原料; 其次是产生产黄青霉的以下基因的原位表达:1)扩增酶基因,例如头孢霉头孢菌,其表达产物通过环扩展将己二酰基-6-APA转化为己二酰-7- ADCA; 2)表达产物将己二酰-7-ADCA的3-甲基侧链转化为3-羟甲基的羟化酶基因,得到第一产物7-氨基乙酰基头孢烷酸(7-ADAC); 和3)其表达产物将3-羟甲基侧链转化为7-ACA的3-乙酰氧甲基侧链的乙酰转移酶基因。 然后通过使用己二酰酰化酶裂解己二酰侧链制备最终产物7-ACA。 因此,整个合成使用生物工艺进行,并且是高效和经济的。