Replication Protein Analysis
Replication Protein Analysis - Related Videos
08:53
Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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2025
Enrichment and sequencing of protein-associated nascent DNA (eSPAN) was developed to detect the relative abundance of a chromatin-associated protein on two replicating DNA strands, thereby revealing molecular insight into chromatin replication and its coupled processes. This protocol describes eSPAN procedures in yeast and mouse embryonic stem (ES) cells.
03:09
Fluorescently Tagged Repressor Protein-Mediated Replication Blockage in Escherichia coli
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2025
Source: Mettrick, K. A., Lawrence, et al., Inducing a Site-Specific Replication Blockage in E. coli Using a Fluorescent Repressor Operator System. J. Vis. Exp. (2016)This video demonstrates site-specific replication fork blockage in Escherichia coli using arabinose-induced expression of yellow fluorescent protein-tagged TetR that binds chromosomal tetO arrays.
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...
10:36
Visualization of UV-induced Replication Intermediates in E. coli using Two-dimensional Agarose-gel Analysis
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Cited by 2 •
2010
We present a procedure by which two-dimensional agarose-gel analysis can be used to identify the structure of replication intermediates that occur following UV irradiation.
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
Assembly at origins creates a controlled platform for DNA duplication. Initiating factors gather at these genomic sites, then recruit DNA polymerases and associated enzymes needed for strand synthesis. Examining which proteins assemble, and in what relationships, helps reveal how replication begins and how defects in initiation may affect accurate genome transmission.
These measurements describe different aspects of replication control. Abundance indicates how much of a factor is present, activity addresses whether it performs its function, localization shows where it operates, and interaction analysis identifies associated partners. Combining these readouts distinguishes changes in protein quantity from changes in placement, function, or assembly.
Interactions connect replication factors into functional assemblies rather than treating each protein as an isolated component. They can show how initiating proteins recruit polymerases and associated enzymes, or how multiple factors coordinate strand synthesis. Mapping these relationships is therefore useful for explaining orderly replication and identifying points where genome maintenance may fail.
A conceptual workflow begins by selecting replication factors and establishing the biological or experimental conditions to compare. Investigators then measure relevant properties, such as abundance, activity, localization, or interactions, and interpret those results in relation to origin assembly and strand synthesis. Defined conditions make it possible to associate observed differences with the process being studied.
The approach is useful when researchers need to examine how DNA duplication changes across biological states. The source context includes development, cellular stress, infection, and disease, as well as studies of DNA damage responses. Comparing replication factors across these settings can reveal altered control, replication defects, or relationships to genome instability.
By examining replication factors and their regulation, investigators can connect altered DNA duplication with failures in genome stability. The resulting information may help characterize replication defects, clarify responses to DNA damage, and identify replication-associated proteins for further study. In disease-focused biology, these findings support investigation of mechanisms linked to abnormal cell proliferation without assuming a single causal factor.