生物
化学发光
北方斑点
核糖核酸
计算生物学
分子生物学
遗传学
基因
色谱法
化学
作者
Katherine M. McKenney,Robert P Connacher,Elise B. Dunshee,Aaron C. Goldstrohm
出处
期刊:RNA
日期:2024-01-24
卷期号:: rna.079880.123-rna.079880.123
标识
DOI:10.1261/rna.079880.123
摘要
This report describes a chemiluminescence-based detection method for RNAs on northern blots, designated Chemi-Northern. This approach builds on the simplicity and versatility of northern blotting, while dispensing of the need for expensive and cumbersome radioactivity. RNAs are first separated by denaturing gel electrophoresis, transferred to a nylon membrane, and then hybridized to a biotinylated RNA or DNA antisense probe. Streptavidin conjugated with horseradish peroxidase and enhanced chemiluminescence substrate are then used to detect the probe bound to the target RNA. Our results demonstrate the versatility of this method in detecting natural and engineered RNAs expressed in cells, including messenger and noncoding RNAs. We show that Chemi-Northern detection is sensitive and fast, detecting attomole amounts of RNA in as little as 1 second, with high signal intensity and low background. The dynamic response displays excellent linearity. Using Chemi-Northern, we measure the reproducible, statistically significant reduction of mRNA levels by human sequence-specific RNA-binding proteins, PUM1 and PUM2. Additionally, we measure the interaction of the poly(A) binding protein, PABPC1, with poly-adenylated mRNA. Thus, the Chemi-Northern method provides a versatile, simple, cost-effective method to enable researchers to analyze expression, processing, binding, and decay of RNAs.
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