Replication Transcription Coupling
Replication Transcription Coupling - Related Videos
03:08
Production of Reporter-Containing Ebola Virus Transcription- and Replication-Competent Virus-Like Particles
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2026
Source: Hoenen, T., et al. Modeling The Lifecycle Of Ebola Virus Under Biosafety Level 2 Conditions With Virus-like Particles Containing Tetracistronic Minigenomes. J. Vis. Exp. (2014)This video demonstrates how a tetracistronic minigenome plasmid mimicking the Ebola virus genome is transfected into human cells along with helper plasmids. Inside the cells, viral proteins and luciferase are expressed, leading to the assembly and budding of non-pathogenic, replication-competent virus-like...
02:31
Chromosome Replication
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2020
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin of...
02:40
DNA Replication
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2020
DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied. After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells. Replication in Prokaryotes DNA replication uses a large number of...
13:04
A Protocol for Analyzing Hepatitis C Virus Replication
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Cited by 2 •
2014
Hepatitis C Virus (HCV) is a major human pathogen that causes liver disorders, including cirrhosis and cancer. An HCV infectious cell culture system is essential for understanding the molecular mechanism of HCV replication and developing new therapeutic approaches. Here we describe a protocol to investigate various stages of the HCV replication cycle.
01:02
The DNA Replication Fork
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2020
An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork. Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication forks, one in...
FAQs
The relative direction of movement is a major determinant of conflict severity. Replication and transcription can proceed in the same direction, or the replication fork can meet RNA polymerase head-on. These arrangements create different collision contexts, helping explain why some encounters are tolerated while others stall replication and require repair or restart responses.
R-loops are RNA-DNA hybrids that can form when transcription-associated structures persist during genome duplication. Their formation is significant because replication-transcription conflicts may promote them, linking an encounter between molecular machines to a potential source of replication stress. Cells therefore rely on factors that remove these hybrids to limit their effects on genome stability.
Chromosome organization and transcription control help manage where and when replication and transcription machineries operate on the genome. By reducing problematic encounters or limiting their persistence, these controls lower the chance that a fork will stall. They work alongside factors that remove RNA-DNA hybrids and resolve stalled complexes, providing multiple layers of protection.
A stalled fork can activate responses that address the obstructing transcription-associated structure and restore DNA synthesis. The relevant outcomes include repair of the affected region and restart of the replication process. These responses matter because unresolved conflicts can connect replication-associated damage with changes in gene expression and altered mutation patterns.
Research on this coupling can show how cells preserve genetic information while maintaining gene expression. It can identify how fork encounters, stalled complexes, R-loops, repair, and restart are connected. This perspective is useful for interpreting replication-associated damage, explaining changes in mutation patterns, and relating genome maintenance processes to disease-related biology.
The relationship is relevant because replication and transcription operate on the same genome but can interfere with one another. Conflicts may affect both genome stability and gene expression, while inadequate resolution can contribute to replication-associated damage. Studying these links helps connect basic chromosome maintenance with disease-related biological changes without treating replication and transcription as isolated processes.