Method for producing sialic-acid-containing sugar chain
    3.
    发明授权
    Method for producing sialic-acid-containing sugar chain 有权
    含唾液酸糖链的方法

    公开(公告)号:US09376506B2

    公开(公告)日:2016-06-28

    申请号:US14002645

    申请日:2012-02-27

    摘要: [Problem to be Solved]The importance of sugar chains having α2,3- or α2,6-linked sialic acid at their non-reducing ends is known. Industrial production has been demanded for these sugar chain compounds. Particularly, the production of glycoprotein drugs or the like inevitably requires producing in quantity sugar chains having homogeneous structures by controlling the linking pattern (α2,6-linkage or α2,3-linkage) of sialic acid. Particularly, a triantennary or tetraantennary N-type complex sugar chain having sialic acid at each of all non-reducing ends is generally considered difficult to chemically synthesize. There has been no report disclosing that such a sugar chain was chemically synthesized. Furthermore, these sugar chains are also difficult to efficiently prepare enzymatically.[Solution]The present inventors have newly found the activity of sialyltransferase of degrading sialic acid on a reaction product in the presence of CMP and also found that formed CMP can be degraded enzymatically to thereby efficiently produce a sialic acid-containing sugar chain. The present inventors have further found that even a tetraantennary N-type sugar chain having four α2,6-linked sialic acid molecules, which has previously been difficult to synthesize, can be prepared at high yields by one-pot synthesis comprising the elongation reaction of a biantennary sugar chain used as a starting material without performing purification after each enzymatic reaction.

    摘要翻译: [待解决的问题]已知具有α2,3-或α2,6连接的唾液酸在其非还原性末端的糖链的重要性。 这些糖链化合物已经需要工业生产。 特别是通过控制唾液酸的连接模式(α2,6-键或α2,3-键),糖蛋白药物等的生产不可避免地需要通过量产生具有均匀结构的糖链。 特别地,在所有非还原性末端中的每一个具有唾液酸的三末端或四末端N-型复合糖链通常被认为难以化学合成。 没有报道披露这样的糖链是化学合成的。 此外,这些糖链也难以有效地制备酶。 [解决方案]本发明人在CMP存在下新发现唾液酸转移酶唾液酸转移酶在反应产物上的活性,并且发现形成的CMP可以酶促降解,从而有效地产生含唾液酸的糖链。 本发明人进一步发现,即使具有四个α2,6-连接的唾液酸分子的四末端N-型糖链,其先前难以合成,可以通过一锅合成以高收率制备,包括: 在每个酶反应后不用进行纯化的双天线糖链用作原料。

    METHOD FOR PRODUCING SIALIC-ACID-CONTAINING SUGAR CHAIN
    4.
    发明申请
    METHOD FOR PRODUCING SIALIC-ACID-CONTAINING SUGAR CHAIN 有权
    生产含酸性糖的糖链的方法

    公开(公告)号:US20140066617A1

    公开(公告)日:2014-03-06

    申请号:US14002645

    申请日:2012-02-27

    IPC分类号: C12P19/18 C08B37/00

    摘要: [Problem to be Solved]The importance of sugar chains having α2,3- or α2,6-linked sialic acid at their non-reducing ends is known. Industrial production has been demanded for these sugar chain compounds. Particularly, the production of glycoprotein drugs or the like inevitably requires producing in quantity sugar chains having homogeneous structures by controlling the linking pattern (α2,6-linkage or α2,3-linkage) of sialic acid. Particularly, a triantennary or tetraantennary N-type complex sugar chain having sialic acid at each of all non-reducing ends is generally considered difficult to chemically synthesize. There has been no report disclosing that such a sugar chain was chemically synthesized. Furthermore, these sugar chains are also difficult to efficiently prepare enzymatically.[Solution]The present inventors have newly found the activity of sialyltransferase of degrading sialic acid on a reaction product in the presence of CMP and also found that formed CMP can be degraded enzymatically to thereby efficiently produce a sialic acid-containing sugar chain. The present inventors have further found that even a tetraantennary N-type sugar chain having four α2,6-linked sialic acid molecules, which has previously been difficult to synthesize, can be prepared at high yields by one-pot synthesis comprising the elongation reaction of a biantennary sugar chain used as a starting material without performing purification after each enzymatic reaction.

    摘要翻译: [待解决的问题]已知具有α2,3-或α2,6-连接的唾液酸在其非还原末端的糖链的重要性。 这些糖链化合物已经需要工业生产。 特别地,糖蛋白药物等的生产不可避免地需要通过控制唾液酸的连接模式(α2,6-键或α2,3-键)来产生具有均匀结构的量的糖链。 特别地,在所有非还原性末端中的每一个具有唾液酸的三末端或四末端N-型复合糖链通常被认为难以化学合成。 没有报道披露这样的糖链是化学合成的。 此外,这些糖链也难以有效地制备酶。 [解决方案]本发明人在CMP存在下新发现唾液酸转移酶唾液酸转移酶在反应产物上的活性,并且发现形成的CMP可以酶促降解,从而有效地产生含唾液酸的糖链。 本发明人进一步发现,即使具有四个α2,6-连接的唾液酸分子的四末端N-型糖链,其先前难以合成,可以通过一锅合成以高收率制备,其包括延伸反应 在每个酶反应后不用进行纯化的双天线糖链用作原料。