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    • 2. 发明授权
    • Fluorogenic substrates for BETA-lactamase gene expression
    • 荧光底物用于BETA-内酰胺酶基因表达
    • US07427680B2
    • 2008-09-23
    • US10884019
    • 2004-07-02
    • Roger Y. TsienJianghong Rao
    • Roger Y. TsienJianghong Rao
    • C07D501/24G01N33/573
    • C12Q1/6897C07D463/18C07D463/20C07D501/00C07D505/00C07F9/65613
    • Fluorescent substrates for beta-lactamases having the general formula shown above are provided. Z includes a fluorophore or chromophore and includes a group that may link to the lactam-containing group; R1 and R2 are independently selected from H, aliphatic, aromatic, alkyl, and acyl; R4 may be H and lower alkyl; B may be H, physiologically acceptable salts or metal, ester groups, ammonium cations, —CHR5OCO(CH2)nCH3, —CHR5OCOC(CH3)3, acylthiomethyl, acyloxy-alpha-benz, deltabutyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, and dialkylaminocarbonyloxymethyl, in which R5 is selected from the group consisting of H and lower alkyl; n is an integer between 0 and 10, inclusive; and A may be S, O, SO, SO2 or CH2. In embodiments, the beta-lactam ring may be cleaved by a beta-lactamase enzyme effective to free a fluorophore. Methods of assaying beta-lactamase activity and monitoring expression in systems using beta-lactamase as a reporter gene are also disclosed.
    • 提供了具有上述通式的β-内酰胺酶的荧光底物。 Z包括荧光团或发色团,并且包括可以连接到含内酰胺基团的基团; R 1和R 2独立地选自H,脂族,芳族,烷基和酰基; R 4可以是H和低级烷基; B可以是H,生理上可接受的盐或金属,酯基,铵阳离子,-CHR 5 OCO(CH 2)n CH 2 (CH 3)3,酰基硫甲基,酰氧基-α-苯并三唑,丁内酰脲,甲氧羰基氧基甲基, 苯基,甲基亚磺酰基甲基,β-吗啉代乙基,二烷基氨基乙基和二烷基氨基羰基氧基甲基,其中R 5选自H和低级烷基; n是0和10之间的整数,包括0和10; A可以是S,O,SO,SO 2或CH 2。 在实施方案中,β-内酰胺环可以被有效释放荧光团的β-内酰胺酶切割。 还公开了使用β-内酰胺酶作为报告基因的系统中测定β-内酰胺酶活性和监​​测表达的方法。