Linker Dna
Linker Dna - Related Videos
10:34
Identification of Sleeping Beauty Transposon Insertions in Solid Tumors using Linker-mediated PCR
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Cited by 3 •
2013
A method of identifying unknown drivers of carcinogenesis using an unbiased approach is described. The method uses the Sleeping Beauty transposon as a random mutagen directed to specific tissues. Genomic mapping of transposon insertions that drive tumor formation identifies novel oncogenes and tumor suppressor...
14:40
Expression Analysis of Mammalian Linker-histone Subtypes
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Cited by 22 •
2012
We describe a set of assays to analyze expression levels of H1 linker histones. mRNA of individual H1 genes are quantitatively measured by random primer based reverse transcription followed by real-time PCR, whereas protein quantification of H1 histones is achieved by HPLC analysis.
09:31
Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites
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Cited by 56 •
2016
We describe a protocol for amplifying retroviral integration sites from the genomic DNA of infected cells, sequencing the amplified virus-host junctions, and then mapping these sequences to a reference genome. We also describe techniques to quantify the distribution of integration sites relative to various genomic annotations using BEDTools.
01:09
Cytoskeletal Linker Proteins - Plakins
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2023
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
11:42
Iterative Optimization of DNA Duplexes for Crystallization of SeqA-DNA Complexes
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2012
Crystal structure of protein–DNA complexes can provide insight into protein function, mechanism, as well as, the nature of the specific interaction. Here, we report how to optimize the length, sequence and ends of duplex DNA for co-crystallization with Escherichia coli SeqA, a negative regulator of replication initiation.
FAQs
Length and sequence provide structural variables that shape how neighboring nucleosomes are arranged. Differences in these features can alter nucleosome spacing and the overall architecture of chromatin rather than merely changing the DNA between nucleosomes. Consequently, linker-region variation may influence how readily regulatory proteins and transcriptional machinery encounter nearby genomic regions.
Histone H1 binds the exposed linker region and helps promote folding into more compact chromatin structures. This compaction changes the physical accessibility of regulatory proteins and transcriptional machinery. H1 therefore provides a mechanistic connection between nucleosome organization and gene-expression control, because its association with linker DNA can shift whether regulatory components can reach the underlying genomic information.
Changes in linker regions or their associated proteins can modify nucleosome spacing, creating differences in chromatin organization. Those structural differences may affect access to regulatory proteins and transcriptional machinery, which can alter gene-expression control. At the cellular level, this provides a route by which variation in chromatin components contributes to differences in cellular state and function.
It offers a way to examine gene regulation through chromatin structure. Investigators can relate linker-region length and sequence, histone H1 association, and nucleosome spacing to chromatin compaction and access by regulatory machinery. This makes linker DNA relevant to epigenetics, genome organization, and chromatin-based regulation, where structural changes help explain differences in gene control.
Studies can focus on three connected features: linker-region length and sequence, binding of histone H1, and spacing between adjacent nucleosomes. Examining these together helps connect local DNA properties with chromatin folding and accessibility. The resulting interpretation can address how genome packaging is coordinated with selective control of gene expression.
It can help explain how cells package extensive genomes while retaining selective access to regulatory regions. It also supports questions about why cellular states differ when linker regions, histone H1, or nucleosome spacing change. These findings are relevant to understanding genome organization, epigenetic regulation, and the chromatin mechanisms that influence cellular function.