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    • 71. 发明授权
    • Biologically pure culture of aureobacterium barkeri KDO-37-2
    • 生物纯培养的巴氏杆菌KDO-37-2
    • US5869316A
    • 1999-02-09
    • US767182
    • 1996-12-16
    • Chi-Huey WongTakeshi SugaiGwo-Jenn Shen
    • Chi-Huey WongTakeshi SugaiGwo-Jenn Shen
    • C07H7/027C12N9/88C12P7/58C12P9/00C12P19/02C12N1/20
    • C12P19/02C07H7/027C12N9/88C12P7/58C12P9/00Y10S435/822
    • Aureobacterium barkeri strain KDO-37-2 (ATCC 49977) and KDO aldolase (EC 4.1.2.23) isolated therefrom are disclosed. The KDO aldolase is further disclosed to have a broad substrate specificity with respect to its reverse reaction, i.e. the condensation of aldoses with pyruvate to form a wide range of 2-keto-3-deoxy-onic acids, including 2-keto-3-deoxy-nonulosonic acid, 2-keto-3-deoxy-octulosonic acid, 2-keto-3-deoxy-heptulosonic acid, and 2-keto-3-deoxy-hexulosonic acid. In particular, 3-deoxy-D-manno-2-octulosonic acid (D-KDO), a vital component of lipopolysaccharides found in the bacterial outer membrane may be synthesized from D-arabinose and pyruvate in 67% yield. Additionally, protected forms of the KDO aldolase products, e.g. hexaacetyl 2-keto-3-deoxy-nonulosonic acid and pentaacetyl 2-keto-3-deoxy-octulosonic acid, may be decarboxylated to form the corresponding 2-deoxy-aldoses, e.g. 2-deoxy-octulose and 2-deoxy-heptulose respectively.
    • 公开了分离自巴斯德氏菌杆菌菌株KDO-37-2(ATCC 49977)和KDO醛缩酶(EC 4.1.2.23)。 进一步公开KDO醛缩酶相对于其逆反应具有广泛的底物特异性,即醛糖与丙酮酸的缩合形成宽范围的2-酮-3-脱氧ic酸,包括2-酮-3- 脱氧 - 非酮酸,2-酮-3-脱氧 - 八环酮酸,2-酮-3-脱氧 - 庚酮酸和2-酮-3-脱氧 - 己酸。 特别地,在D-细菌外膜中发现的脂多糖的重要组分3-脱氧-D-壬烯-2-辛酮酸(D-KDO)可由D-阿拉伯糖和丙酮酸合成,产率67%。 另外,保护形式的KDO醛缩酶产物,例如, 六乙酰基2-酮-3-脱氧 - 非酮酸和五乙酰基2-酮-3-脱氧 - 八环酸可以脱羧以形成相应的2-脱氧醛糖,例如, 2-脱氧 - 八酮糖和2-脱氧 - 七氟醚。
    • 74. 发明授权
    • Carbon linked glycosyl compounds
    • 碳链糖基化合物
    • US5597906A
    • 1997-01-28
    • US33608
    • 1993-03-18
    • Chi-Huey WongHirosato Kondo
    • Chi-Huey WongHirosato Kondo
    • C07D309/10C07H15/00
    • C07D309/10
    • Carbon linked glycosyl compounds are disclosed and synthesized. The synthesis employs a blocked carbohydrate donor and a blocked glycosyl acceptor. The blocked carbohydrate donor includes an acid labile phosphite leaving group attached to the anomeric carbon. The blocked glycosyl acceptor includes an unprotected carbon susceptible to electrophilic attack. The reaction is initiated by the addition of a Lewis acid so as to activate the acid labile phosphite leaving group on the carbohydrate donor. The substitution reaction may be conducted at -78.degree. C. in a solvent which favors the formation of carbon linked glycosylation products.
    • 公开并合成了碳链糖基化合物。 该合成使用封闭的碳水化合物供体和封闭的糖基受体。 封闭的碳水化合物供体包括与异头碳连接的酸不稳定的亚磷酸酯离去基团。 封闭的糖基受体包括易受亲电发作的未受保护的碳。 通过加入路易斯酸来引发反应,以活化碳水化合物供体上的酸不稳定亚磷酸酯离去基团。 取代反应可以在-78℃下在有利于形成碳连接的糖基化产物的溶剂中进行。
    • 78. 发明授权
    • KDO Aldolase and condensation reactions employed therewith
    • KDO醛缩酶和与其一起使用的缩合反应
    • US5358859A
    • 1994-10-25
    • US993140
    • 1992-12-18
    • Chi-Huey WongTakeshi SugaiGwo-Jenn Shen
    • Chi-Huey WongTakeshi SugaiGwo-Jenn Shen
    • C07H7/027C12N9/88C12P7/58C12P9/00C12P19/02
    • C12P19/02C07H7/027C12N9/88C12P7/58C12P9/00Y10S435/822
    • Aureobacterium barkerei strain KDO-37-2 (ATCC 49977) KDO aldolase (EC 4.1.2.23) isolated therefrom are disclosed. The DKDO aldolase is further disclosed to have a broad substrate specificity with respect to its reverse reaction, i.e. the condensation of aldoses with pyruvate to form a wide range of 2-keto-3-deoxy-onic acids, including 2-keto-3-deoxy-nonulosonic acid, 2-keto-3-deoxy-octulosonic acid, 2-keto-3-deoxy-heptulosonic acid, and 2-keto-3-deoxy-hexulosonic acid. In particular, 3-deoxy-D-manno-2-octulosonic acid (D-KDO), a vital component of lipopolysaccharides found in the bacterial outer membrane may be synthesized from D-arabinose and pyruvate in 67% yield. Additionally, protected forms of the KDO aldolase products, e.g. hexaacetyl 2-keto-3-deoxy-nonulosonic acid and pentaacetyl 2-keto-3-deoxy-octulosonic acid, may be decarboxylated to form the corresponding 2-deoxy-aldoses, e.g. 2-deoxy-octulose and 2-deoxy-heptulose respectively.
    • 公开了从其分离的巴氏杆菌菌株KDO-37-2(ATCC 49977)KDO醛缩酶(EC 4.1.2.23)。 进一步公开了DKDO醛缩酶对于其逆反应具有广泛的底物特异性,即醛糖与丙酮酸的缩合形成宽范围的2-酮-3-脱氧酸,包括2-酮-3- 脱氧 - 非酮酸,2-酮-3-脱氧 - 八环酮酸,2-酮-3-脱氧 - 庚酮酸和2-酮-3-脱氧 - 己酸。 特别地,在D-细菌外膜中发现的脂多糖的重要组分3-脱氧-D-壬烯-2-辛酮酸(D-KDO)可由D-阿拉伯糖和丙酮酸合成,产率67%。 另外,保护形式的KDO醛缩酶产物,例如, 六乙酰基2-酮-3-脱氧 - 非酮酸和五乙酰基2-酮-3-脱氧 - 八环酸可以脱羧以形成相应的2-脱氧醛糖,例如, 2-脱氧 - 八酮糖和2-脱氧 - 七氟醚。