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Alternative RNA Splicing

Alternative RNA Splicing

Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...

RNA Splicing

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...

Pre-mRNA Processing: RNA Splicing

Pre-mRNA Processing: RNA Splicing

Chromatin Structure Regulates pre-mRNA Processing

Chromatin Structure Regulates pre-mRNA Processing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...

Chromatin Structure and RNA Splicing

Chromatin Structure and RNA Splicing

RNA Editing

RNA Editing

RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...

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Methods for Characterization of Alternative RNA Splicing.

Samuel E Harvey^1,2, Jingyi Lyu^1,2, Chonghui Cheng^3,4

¹Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA.

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

|August 21, 2021

Summary

Detecting gene splice variants involves quantitative reverse transcription PCR (RT-PCR) and minigene assays. Careful primer design is crucial for accurately quantifying alternative splicing events in total RNA.

Keywords:

Alternative splicing Minigene RNA RT-PCR Splicing factors Splicing regulation Variable exon

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Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

Alternative splicing generates diverse protein isoforms from a single gene, impacting cellular function.
Quantifying alternatively spliced isoforms is essential for understanding gene expression regulation and disease mechanisms.

Purpose of the Study:

To describe methods for quantifying alternative splicing events in total RNA.
To introduce the use of splicing minigenes for studying alternative splicing regulation.

Main Methods:

Quantitative real-time and semiquantitative reverse transcription PCR (RT-PCR) for detecting splice isoform abundance.
Detailed PCR primer design strategies for specific splice isoform detection.
Splicing minigene assays in mammalian cell culture to investigate exon-specific splicing regulation.

Main Results:

Established RT-PCR methods enable accurate quantification of differentially spliced isoforms.
Demonstrated the utility of minigene assays for dissecting regulatory mechanisms of alternative splicing.

Conclusions:

RT-PCR provides a robust approach for quantifying alternative splicing.
Splicing minigene systems offer a powerful tool for functional studies of alternative splicing regulation.