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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...

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...

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...

Pre-mRNA Processing: RNA Splicing

Pre-mRNA Processing: 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...

Chromatin Structure and RNA Splicing

Chromatin Structure and RNA Splicing

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...

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...

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Correlation between splicing sites within an intron and their sequence complementarity with U1 RNA.

V E Avvedimento, G Vogeli, Y Yamada

|October 1, 1980

Summary

Researchers analyzed chick alpha 2-collagen gene introns, revealing U1 RNA

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Area of Science:

Molecular Biology
Genetics
RNA Processing

Background:

Introns are non-coding sequences within genes that are removed during RNA splicing.
The chick alpha 2-collagen (type I) gene contains short introns crucial for gene expression regulation.
U1 RNA plays a role in pre-mRNA splicing by recognizing splice sites.

Purpose of the Study:

To determine the nucleotide sequence of short introns in the chick alpha 2-collagen gene.
To investigate the role of U1 RNA complementarity in intron splicing.
To identify potential internal splicing sites and analyze the splicing mechanism.

Main Methods:

Nucleotide sequencing of introns and adjacent exons.
Analysis of U1 RNA complementarity to intron sequences.
S1 mapping experiments to identify RNA precursors with deleted intron segments.

Main Results:

The nucleotide sequences of two chick alpha 2-collagen gene introns were determined.
U1 RNA complementarity was found at intron ends and internal sequences, predicting multiple splicing sites.
S1 mapping revealed three RNA precursors with deleted intron portions, consistent with predicted splicing points.

Conclusions:

The study identified potential internal splicing sites within chick alpha 2-collagen gene introns.
Data suggest a sequential splicing mechanism where 3' intron sequences are removed before 5' sequences.
These findings contribute to understanding the intricate process of RNA splicing in collagen gene expression.