MODIFIED AMADORIASE AND METHOD FOR PRODUCING SAME, AGENT FOR IMPROVING SURFACTANT-RESISTANCE OF AMADORIASE AND COMPOSITION FOR MEASURING HbA1c USING SAME
申请人:Kikkoman Corporation
公开号:EP3031914A1
公开(公告)日:2016-06-15
Provided is a composition by which glycated hemoglobin can be measured even in the presence of a stronger surfactant than a conventional case. Also provided is a buffer and/or stabilizer which maintains the residual activity of an amadoriase or lowers a reduction of residual activity. The present invention provides a composition for use in measuring glycated hemoglobin containing an amadoriase having substitution of one or more amino acid residues at a position(s) corresponding to an amino acid(s) selected from the group consisting of position 262, position 257, position 249, position 253, position 337, position 340, position 232, position 129, position 132, position 133, position 44, position 256, position 231 and position 81 of an amadoriase derived from the genus Coniochaeta and represented by SEQ ID No: 1 or 3, and having residual activity even in the presence of a surfactant. The present invention also provides a composition and kit for use in measuring glycated hemoglobin, comprising a specific stabilizer and/or a buffer. The present invention can provide an enzyme and a composition for use in measuring glycated hemoglobin, excellent in storage stability even if they are exposed to a surfactant.
本发明提供了一种即使在表面活性剂强于常规情况下也能测定糖化血红蛋白的组合物。本发明还提供了一种缓冲剂和/或稳定剂,可保持氨甲蝶呤酶的残余活性或降低残余活性的降低。本发明提供了一种用于测定糖化血红蛋白的组合物,该组合物含有在与选自 Coniochaeta 属并由 SEQ ID No:1 或 3 所代表的氨甲蝶呤酶,即使在表面活性剂存在的情况下也具有残余活性。本发明还提供了一种用于测量糖化血红蛋白的组合物和试剂盒,其中包含一种特定的稳定剂和/或缓冲剂。本发明可提供一种酶和一种用于测量糖化血红蛋白的组合物,即使它们暴露于表面活性剂中,也具有极佳的储存稳定性。