کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7230517 1470950 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sensitive SERS detection of DNA methyltransferase by target triggering primer generation-based multiple signal amplification strategy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Sensitive SERS detection of DNA methyltransferase by target triggering primer generation-based multiple signal amplification strategy
چکیده انگلیسی
A novel and sensitive surface-enhanced Raman scattering (SERS) method is proposed for the assay of DNA methyltransferase (MTase) activity and evaluation of inhibitors by developing a target triggering primer generation-based multiple signal amplification strategy. By using of a duplex substrate for Dam MTase, two hairpin templates and a Raman probe, multiple signal amplification mode is achieved. Once recognized by Dam MTase, the duplex substrate can be cleaved by Dpn I endonuclease and two primers are released for triggering the multiple signal amplification reaction. Consequently, a wide dynamic range and remarkably high sensitivity are obtained under isothermal conditions. The detection limit is 2.57×10−4 U mL−1. This assay exhibits an excellent selectivity and is successfully applied in the screening of inhibitors for Dam MTase. In addition, this novel sensing system is potentially universal as the recognition element can be conveniently designed for other target analytes by changing the substrate of DNA MTase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 81, 15 July 2016, Pages 111-116
نویسندگان
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