METHODS AND COMPOUNDS FOR DETECTING BETA-LACTAMASE ACTIVITY
申请人:XING Bengang
公开号:US20090275065A1
公开(公告)日:2009-11-05
The present invention relates to compounds for and a method of detecting beta-lactamase activity in a sample. The sample is contacted with a nanoparticulate tag. The nanoparticulate tag comprises a metal or a combination of metals, or it comprises a nanotube of a metal, boron nitride and/or carbon. The respective metal is capable of forming one of a covalent bond, a coordinative bond and a non-covalent interaction with a thio or a seleno group. The sample is contacted with a compound of one of general formulas (I)-(III) and (VII)-(IX). At least one beta-lactam moiety of the compound is cleaved by the beta-lactamase activity in the sample. As a result a cleavage moiety Z-A-Z, Z-A-Z-R
15
, Z-A-Z-R
16
, Z-A-Z-R
17
, Z-A-Z-R
18
or Z-G-N(R
8
)R
9
is released that is immobilised on the surface of the nanoparticulate tag by a covalent bond via a Z atom. The presence of beta-lactamase activity is determined based on the presence of the cleavage moiety immobilized onto the surface of the nanoparticulate tag.