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.
本发明涉及一种用于检测样品中β-内酰胺酶活性的化合物和方法。样品与纳米颗粒标记物接触。纳米颗粒标记物包括金属或金属组合,或者包括金属、硼氮化物和/或碳的纳米管。所述金属能够与硫或硒基团形成共价键、配位键或非共价相互作用之一。样品与一般式(I)-(III)和(VII)-(IX)中的化合物接触。化合物中的至少一个β-内酰胺基团被样品中的β-内酰胺酶活性切割。结果释放出一个通过Z原子通过共价键固定在纳米颗粒标记物表面上的切割基团Z-A-Z、Z-A-Z-R15、Z-A-Z-R16、Z-A-Z-R17、Z-A-Z-R18或Z-G-N(R8)R9。通过检测固定在纳米颗粒标记物表面上的切割基团来确定β-内酰胺酶活性的存在。