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DNA Microarrays

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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Updated: May 30, 2026

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

Published on: June 24, 2021

Polyadenylation state microarray (PASTA) analysis.

Traude H Beilharz¹, Thomas Preiss

¹Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia.

Methods in Molecular Biology (Clifton, N.J.)

|August 25, 2011

Summary

This summary is machine-generated.

Researchers developed a new method called polyadenylation state microarray (PASTA) to analyze poly(A) tail lengths across the transcriptome. This technique helps understand how mRNA tail length impacts gene expression and cellular functions.

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Measurement of Poly A Tail Length from Drosophila Larva Brain and Cell Line

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Area of Science:

Molecular Biology
Genomics
Biochemistry

Background:

Eukaryotic messenger RNA (mRNA) molecules typically end with a poly(A) tail.
The poly(A) tail is crucial for mRNA stability and translation efficiency in the cytoplasm.
Regulation of mRNA utilization often involves dynamic changes in poly(A) tail length.

Purpose of the Study:

To develop a method for assessing poly(A) tail length control across the entire transcriptome.
To provide a detailed description of the polyadenylation state microarray (PASTA) approach.
To outline complementary methods for poly(A) tail length measurement.

Main Methods:

The polyadenylation state microarray (PASTA) method utilizes poly(U) sepharose chromatography.
mRNA is purified based on poly(A) tail length through thermal elution.
Purified mRNA fractions undergo subsequent microarray analysis.

Main Results:

The PASTA method enables the analysis of poly(A) tail length distribution within a transcriptome.
The study details the PASTA procedure for researchers.
Methods for bulk and mRNA-specific poly(A) tail length measurements are provided for validation.

Conclusions:

The PASTA method offers a comprehensive approach to study poly(A) tail length regulation.
This technique facilitates a deeper understanding of mRNA processing and its role in gene expression.
The described methods support the monitoring and verification of poly(A) tail length analyses.