Cloning genes from streptomyces cyaneogriseus subsp. noncyanogenus for biosynthesis of antibiotics and methods of use
    22.
    发明申请
    Cloning genes from streptomyces cyaneogriseus subsp. noncyanogenus for biosynthesis of antibiotics and methods of use 失效
    从链霉菌Cyylogriseus亚种克隆基因 用于生物合成抗生素的非花青素和使用方法

    公开(公告)号:US20050003409A1

    公开(公告)日:2005-01-06

    申请号:US10844716

    申请日:2004-05-13

    摘要: The present invention relates to the complete biosynthetic pathway for the formation of the LL-F28249 compounds and, most importantly, the major component LL-F28249α. The purified and isolated nucleic acid molecule encoding the proteins of the biosynthetic pathway, which is isolated from a wild-type or mutant Streptomyces, is fully described in FIG. 6 to FIG. 6-39and SEQ ID NO:1. The DNA gene cluster and its expression in a suitable host enable the efficient production of the highly active natural metabolites and semisynthetic derivatives. The invention further concerns plasmids, vectors and host cells that contain and express the novel nucleic acid molecule. Of particular interest, the entire biosynthetic pathway fits compactly in three plasmids, Cos11, Cos36 and Cos40. The invention also concerns the purified and isolated biosynthesis proteins that are encoded by the whole DNA gene cluster. Additionally, the invention involves a new efficient, biochemical method of preparing moxidectin.

    摘要翻译: 本发明涉及用于形成LL-F28249化合物的完整生物合成途径,最重要的是涉及主要成分LL-F28249α。 编码从野生型或突变链霉菌分离的生物合成途径的蛋白质的纯化和分离的核酸分子在图1中完全描述。 参照图6〜 6-39和SEQ ID NO:1。 DNA基因簇及其在合适的宿主中的表达使得能够高效生产高活性的天然代谢物和半合成衍生物。 本发明还涉及含有和表达新型核酸分子的质粒,载体和宿主细胞。 特别令人感兴趣的是,整个生物合成途径紧密地适应于三种质粒Cos11,Cos36和Cos40。 本发明还涉及由整个DNA基因簇编码的纯化和分离的生物合成蛋白。 此外,本发明涉及制备莫昔克丁的新的有效的生物化学方法。

    Separation system for preparing high .alpha.-glycosyl-L-ascorbic acid
    29.
    发明授权
    Separation system for preparing high .alpha.-glycosyl-L-ascorbic acid 失效
    制备高α-糖基-L-抗坏血酸的分离系统

    公开(公告)号:US5630923A

    公开(公告)日:1997-05-20

    申请号:US434327

    申请日:1995-05-02

    CPC分类号: C07H17/04

    摘要: A separation system to prepare a high .alpha.-glycosyl-L-ascorbic acid content product involves the use of a specific anion-exchange membrane having a molecular weight cut-off in the range of about 100-1,000. The system readily separates .alpha.-glycosyl-L-ascorbic acid from L-ascorbic acid and other impurities and provides a relatively-high yield.

    摘要翻译: 制备高α-糖基-L-抗坏血酸含量产物的分离系统涉及使用分子量截留值在约100-1,000范围内的特定阴离子交换膜。 该系统容易地将α-糖基-L-抗坏血酸与L-抗坏血酸和其它杂质分离并提供相对高的产率。

    .alpha.-glycosyl quercetin, and its preparation and uses
    30.
    发明授权
    .alpha.-glycosyl quercetin, and its preparation and uses 失效
    α-糖基槲皮素及其制备和用途

    公开(公告)号:US5565435A

    公开(公告)日:1996-10-15

    申请号:US390277

    申请日:1995-02-15

    摘要: A novel .alpha.-glycosyl quercetin, wherein at least equimolar D-glucose residues are attached to quercetin via the .alpha.-bond, has a satisfactory water-solubility, light tolerance and stability, and exerts the inherent activity of quercetin in vivo. The .alpha.-glycosyl quercetin is prepared by a process comprising subjecting a solution containing quercetin and an .alpha.-glucosyl saccharide to the action of a saccharide-transferring enzyme to form an .alpha.-glycosyl quercetin, and recoverying the resultant .alpha.-glycosyl quercetin. The .alpha.-glycosyl quercetin can be advantageously used in combination with other materials in food products, cosmetic compositions and pharmaceutical compositions as a highly-safe and natural vitamin P-enriched agent, yellow-color-imparting agent, antioxidant, deodorant, stabilizer, quality-improving agent, antiseptic, prophylactic agent, therapeutic agent and ultraviolet-absorbing agent.

    摘要翻译: 一种新型α-糖基槲皮素,其中至少等摩尔D-葡萄糖残基通过α键与槲皮素连接,具有令人满意的水溶性,光耐受性和稳定性,并且在体内发挥槲皮素的固有活性。 α-糖基槲皮素通过包括使含有槲皮素和α-葡糖基糖的溶液进行糖转移酶的作用以形成α-糖基槲皮素并回收所得的α-糖基槲皮素的方法制备。 α-糖基槲皮素可有利地与食品,化妆品组合物和药物组合物中的其它材料组合使用,作为高度安全和天然的维生素P富集剂,黄色赋予剂,抗氧化剂,除臭剂,稳定剂,质量 改善剂,防腐剂,预防剂,治疗剂和紫外线吸收剂。