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    • 2. 发明申请
    • CREATINE AMIDINOHYDROLASE AND PROCESS FOR PRODUCING THE SAME
    • CRETINE AMININOHYDROLASE AND PROCESS FOR PRODUCTION THE SAME
    • WO0031245A8
    • 2001-11-15
    • PCT/JP9906583
    • 1999-11-25
    • KIKKOMAN CORPFURUKAWA KEISUKEICHIKAWA TOSHIO
    • FURUKAWA KEISUKEICHIKAWA TOSHIO
    • C12N15/09C12N1/21C12N9/78C12N9/80C12N15/00C12R1/05C12R1/19
    • C12N9/78C12Y305/03003
    • A creatine amidinohydrolase having the following physicochemical properties: (a) hydrolyzing 1 mol of creatine to give 1 mol of sarcocine and 1 mol of urea; (b) having a substrate specificity for creatine; (c) having an optimum pH value of 6 to 7, in particular about 6.5; (d) being stable within a pH range of 4 to 11.0; (e) having an optimum working temperature range of 50 to 55 DEG C; and (f) having a molecular weight of about 92,000 Da (measured by gel filtration); and a process for producing this creatine amidinohydrolase which comprises culturing a microorganism capable of producing the creatine amidinohydrolase and collecting the creatine amidinohydrolase from the culture medium. Because of having the optimum pH value in the weakly acidic region, the creatine amidinohydrolase has a characteristic of being scarcely affected by bilirubin in assaying creatinine.
    • 具有以下物理化学性质的肌酸脒基水解酶:(a)水解1摩尔肌酸,得到1摩尔肌醇和1摩尔尿素; (b)对肌酸具有底物特异性; (c)最佳pH值为6至7,特别是约6.5; (d)在4至11.0的pH范围内稳定; (e)最佳工作温度范围为50至55℃; 和(f)分子量约92,000Da(通过凝胶过滤测量); 以及生产该肌酸脒基水解酶的方法,其包括培养能够产生肌酸脒基水解酶的微生物并从培养基中收集肌酸脒基水解酶。 由于在弱酸性区域具有最佳的pH值,所以肌酸脒基水解酶具有在测定肌酐中几乎不受胆红素影响的特征。
    • 4. 发明公开
    • MODIFIED AMADORIASE AND METHOD FOR PRODUCING SAME, AGENT FOR IMPROVING SURFACTANT-RESISTANCE OF AMADORIASE AND COMPOSITION FOR MEASURING HbA1c USING SAME
    • 改性阿马AND METHOD FOR PRODUCING物的活性,以改善表面活性剂抗性阿马和组合物因此测量HBA1
    • EP3031914A4
    • 2017-01-11
    • EP14834684
    • 2014-08-08
    • KIKKOMAN CORP
    • MASAKARI YOSUKEICHIYANAGI ATSUSHI
    • C12N15/09C12N1/15C12N1/19C12N1/21C12N5/10C12N9/02C12N9/06C12Q1/26G01N33/72
    • C12Q1/26C12N9/0032C12Y105/03G01N33/723G01N2333/805G01N2333/90672
    • 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.
    • 提供了通过该糖化血红蛋白甚至可以在表面活性剂比常规情况下更强的存在下测得的组合物。 如此提供的是其保持阿马道里的残余活性或降低的降低残留活性的缓冲液和/或稳定剂。 本发明提供了在测量糖化血红蛋白在阿马含有具有一个或多个氨基酸残基取代在在选自262位选择的氨基酸(S)对应于位置(S),位置257中使用的组合物, 位置249,位置253,位置337,位置340,位置232,位置129,位置132,位置133,位置44,位置256,位置231和从该属锥毛壳衍生和由SEQ ID NO的阿马道里酶的位置81: 1或3,并且具有即使在表面活性剂存在的残余活性。 本发明因此提供了在测量糖化血红蛋白中使用的组合物和试剂盒,包括一个特定的稳定剂和/或缓冲剂。 本发明可以提供酶和测量糖化血红蛋白,具有优异的储存稳定性,即使它们被暴露到表面活性剂中使用的组合物。