G Overhang Length
G Overhang Length - Related Videos
15:25
Examination of the Telomere G-overhang Structure in Trypanosoma brucei
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Cited by 11 •
2011
Telomeres are essential for chromosome stability and the telomere G-overhang structure is essential for telomerase-mediated telomere maintenance. We have recently adopted two methods for detecting the telomere G-overhang structure in Trypanosoma brucei, which are native in-gel hybridization and ligation-mediated primer extension, which will be described.
02:41
Telomeres and Telomerase
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2020
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
07:34
DNA Ligation Reactions
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2023
In molecular biology, ligation refers to the joining of two DNA fragments through the formation of a phosphodiester bond. An enzyme known as a ligase catalyzes the ligation reaction. In the cell, ligases repair single and double strand breaks that occur during DNA replication. In the laboratory, DNA ligase is used during molecular cloning to join DNA fragments of inserts with vectors – carrier DNA molecules that will replicate target fragments in host organisms. This video provides an...
02:56
Freeze-Cracking of Nematodes: A Method to Expose Interior Worm Tissues for Staining
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2023
This video describes freeze-cracking, a method to make C. elegans tissues accessible for antibody staining by disrupting the cuticle.
09:17
3D Printing of Biomolecular Models for Research and Pedagogy
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Cited by 29 •
2017
Physical models of biomolecules can facilitate an understanding of their structure-function for the researcher, aid in communication between researchers, and serve as an educational tool in pedagogical endeavors. Here, we provide detailed guidance for the 3D printing of accurate models of biomolecules using fused filament fabrication desktop 3D printers.
FAQs
Telomerase and telomere-binding proteins help preserve the architecture of the chromosome end after replication. Their coordinated activity supports the single-stranded terminal region and contributes to end protection. If telomere-maintenance processes become defective, the overhang may change, providing a molecular indication that telomere structure or chromosome-end regulation has been disrupted.
The overhang is part of the structure that allows a telomere to protect a chromosome end from being mistaken for DNA damage. Its measured length therefore reflects more than DNA quantity: it can indicate whether end structure and protective organization remain properly maintained. Abnormal values may signal compromised telomere integrity or genome stability.
Changes in G overhang length are associated with altered telomere maintenance, cellular aging, genome instability, cancer biology, and disorders involving defective telomere regulation. These associations make the measurement useful for connecting chromosome-end structure with broader cellular outcomes, especially when researchers investigate how impaired maintenance affects protection of genetic material.
Researchers measure G overhang length as an indicator of telomere structure, replication, and end protection. Interpreting the measurement alongside the biological condition under study can help reveal whether chromosome ends are being maintained normally or showing signs of disruption. The result is therefore useful for examining telomere integrity rather than treating length as an isolated endpoint.
Measurements can help researchers evaluate how chromosome-end replication and subsequent telomere processing affect the final telomere structure. Because linear chromosome ends cannot be copied completely by conventional replication, the resulting terminal organization provides a readout of how replication-related events are resolved. This supports studies of replication, telomere maintenance, and chromosome-end stability.
Cancer biology and disorders linked to defective telomere maintenance can involve disruption of chromosome-end protection. G overhang length gives researchers a measurable feature for examining that disruption and relating it to genome instability. In these contexts, the measurement helps connect molecular changes at telomeres with disease-relevant cellular behavior and impaired maintenance of genetic material.