申请人:Tsien Y. Roger
公开号:US20070184513A1
公开(公告)日:2007-08-09
Substrates for β-lactamase of the general formula I
in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); R′ is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH
2
)
n
OH, in which n is 0 or an integer from 1 to 5; R″ is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, CHR
2
OCO(CH
2
)
n
CH
3
, —CHR
2
OCOC (CH
3
)
3
, acylthiomethyl, acyloxy-alpha -benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R
2
is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO
2
and CH
2
; and Z′ and Z″ are linkers for the fluorescent donor and quencher moieties. Methods of assaying β-lactamase activity and monitoring expression in systems using β-lactamase as a reporter gene also are disclosed.
通式I的β-内酰胺酶底物,其中X和Y中的一个是荧光给体基团,另一个是猝灭剂(可以或不可以再发射);R'从H,较低的(即1到约5个碳原子的烷基)和(CH2)nOH中选择,其中n为0或1到5的整数;R"从H,生理上可接受的金属和铵阳离子,CHR2OCO(CH2)nCH3,—CHR2OCOC(CH3)3,酰硫甲基,酰氧-α-苯甲基,δ-丁酰内酯,甲氧羰氧甲基,苯基,甲硫氧甲基,β-吗啡啉乙基,二烷基氨基乙基,酰氧烷基,二烷基氨基羰氧甲基和脂肪族中选择,其中R2从H和较低的烷基中选择;A从S,O,SO,SO2和CH2中选择;Z'和Z"是荧光给体和猝灭剂基团的连接器。还公开了评估β-内酰胺酶活性和使用β-内酰胺酶作为报告基因监测表达的方法。