-
DE
3 UTR – Function and Significance of the 3' UTR
The 3 UTR (3' untranslated region) is a segment of messenger RNA located after the stop codon that plays a key role in regulating gene expression.
Things worth knowing about "3 UTR"
The 3 UTR (3' untranslated region) is a segment of messenger RNA located after the stop codon that plays a key role in regulating gene expression.
What Is the 3 UTR?
The 3 UTR (3' untranslated region) is a specific segment of a messenger RNA (mRNA) molecule. It is located at the 3' end of the mRNA, after the stop codon — the signal that terminates protein synthesis. Although this region is not translated into protein, it performs critical regulatory functions within the cell.
Structure and Location
An mRNA molecule consists of several functional regions:
- 5' Cap: A protective structure at the beginning of the mRNA
- 5' UTR: Untranslated region at the start
- Coding Sequence (CDS): The region translated into protein
- 3' UTR: Untranslated region at the end, following the stop codon
- Poly-A Tail: A chain of adenine nucleotides that stabilizes the mRNA
The 3 UTR can range from a few nucleotides to several thousand nucleotides in length, depending on the gene, and is characteristic for each specific gene.
Functions of the 3 UTR
mRNA Stability
The 3 UTR contains sequence motifs that determine how long an mRNA molecule remains stable in the cell before being degraded. Certain sequences — known as AU-rich elements (AREs) — promote rapid mRNA degradation, while other structural elements increase mRNA stability.
Translational Regulation
The 3 UTR influences how efficiently an mRNA is translated into protein. Specific proteins known as RNA-binding proteins (RBPs) can attach to the 3 UTR and either promote or inhibit translation.
microRNA Binding Sites
One of the most well-known functions of the 3 UTR is its role as a binding site for microRNAs (miRNAs). MicroRNAs are small, non-coding RNA molecules that can bind to complementary sequences within the 3 UTR. This binding leads to either degradation of the target mRNA or inhibition of its translation — a fundamental mechanism in the regulation of gene expression.
mRNA Localization
Certain 3 UTR sequences act as signals that determine where within the cell an mRNA is translated. This allows proteins to be produced precisely where they are needed.
Polyadenylation
The 3 UTR contains the polyadenylation signal (commonly the sequence AATAAA), which marks the site where the poly-A tail is added. This tail influences mRNA stability and its export from the cell nucleus.
Clinical Significance
Mutations or alterations in the 3 UTR can have significant effects on gene expression and have been associated with various diseases:
- Cancer: Altered 3 UTR sequences can disrupt the regulation of oncogenes or tumor suppressor genes.
- Genetic disorders: Mutations in the 3 UTR can change the expression of disease-relevant genes.
- Infectious diseases: Many viruses use 3 UTR-like structures to regulate the stability of their own RNA.
In addition, the 3 UTR plays an important role in modern biotechnology, particularly in the development of mRNA therapeutics and vaccines (e.g., COVID-19 mRNA vaccines), where an optimized 3 UTR improves mRNA stability and therapeutic efficacy.
References
- Mayr, C. (2019). What Are 3' UTRs, and How Do They Influence mRNA Fate? Cold Spring Harbor Perspectives in Biology, 11(10), a034728. doi:10.1101/cshperspect.a034728
- Matoulkova, E. et al. (2012). The role of the 3' untranslated region in post-transcriptional regulation of protein expression in mammalian cells. RNA Biology, 9(5), 563–576.
- Lodish, H. et al. (2021). Molecular Cell Biology, 9th edition. W.H. Freeman and Company.
Building Blocks for a Healthy Life
As an integrated manufacturer, we develop & produce evidence-based, patented, and non-patented formulations. We work exclusively with plant and natural extracts according to the strictest purity & quality standards.
The combination of science & modern technology with the laws of nature creates solutions consistently tailored to humans – for the highest good: health.
Verwandte Produkte
Subscription available
Floral
For Healthy Oral Flora & Dental Care
Formulated lozenges with Dentalac®, lactic acid bacteria, and Lactoferrin CLN®30 lozenges
Regular price:
€22.90
Subscription available
Lactoferrin
For your universal protection
As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.[siehe Varianten]
Regular price:
€59.90
Subscription available
Natural Iron
For your iron balance
Specially formulated for your iron balance with plant-based curry leaf iron, Lactoferrin CLN®, and natural Vitamin C from rose hips.
30 Capsules
Regular price:
€35.90
Most read entries
3 Posts in this encyclopedia categoryMagnesiumcarbonat
Magnesiumcarbonat ist eine anorganische Magnesiumverbindung mit säure-neutralisierender (antazidischer) Wirkung. Erfahre mehr über Vorteile, Einsatzgebiete und Unterschiede zu besser resorbierbaren Magnesiumformen.
Calorie content
The choice of food influences our energy intake. The calorie content varies greatly - some provide little energy, others a lot.
Cologne list
The Cologne List ® is an important initiative in competitive sports that offers athletes guidance in the selection of nutritional supplements.