Cis Regulatory Sequences
Cis Regulatory Sequences - Related Videos
02:02
Cis-regulatory Sequences
0 Views •
2020
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
02:02
Cis-regulatory Sequences
0 Views •
2023
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
08:19
Quantitative Comparison of cis-Regulatory Element (CRE) Activities in Transgenic Drosophila melanogaster
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Cited by 15 •
2011
Phenotypic variation for traits can result from mutations in cis-regulatory element (CRE) sequences that control gene expression patterns. Methods derived for use in Drosophila melanogaster can quantitatively compare the levels of spatial and temporal patterns of gene expression mediated by modified or naturally occurring CRE variants.
07:38
Quantifying the Activity of cis-Regulatory Elements in the Mouse Retina by Explant Electroporation
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Cited by 26 •
2011
This protocol describes a simple and inexpensive way to quantify the activity of cis-regulatory elements (i.e., enhancer/promoters) in living mouse retinas via explant electroporation. DNA preparation, retinal dissection, electroporation, retinal explant culture, and post-fixation analysis and quantification are described.
09:06
High-throughput Identification of Gene Regulatory Sequences Using Next-generation Sequencing of Circular Chromosome Conformation Capture (4C-seq)
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Cited by 5 •
2018
The identification of physical interactions between genes and regulatory elements is challenging but has been facilitated by chromosome conformation capture methods. This modification to the 4C-seq protocol mitigates PCR bias by minimizing over-amplification of PCR templates and maximizes the mappability of reads by incorporating an addition restriction enzyme digest step.
FAQs
Their effects depend on the combined actions of transcription factors and other regulatory proteins at control regions. These proteins can recruit transcription machinery, prevent that machinery from acting, or change how accessible the surrounding chromatin is. Consequently, the same gene can respond differently when cellular signals alter which regulatory proteins are present or active, producing context-dependent transcription.
These sequence classes can contribute differently to gene control. Regulatory proteins bound at them may recruit transcription machinery, block its action, or alter chromatin accessibility, while the combined arrangement of promoters, enhancers, silencers, and insulators helps determine the final expression pattern. Examining the elements together therefore gives a more accurate picture than attributing regulation to a single DNA region.
Developmental cues change the regulatory conditions that control gene expression. As cells receive different signals during development, the associated regulatory proteins can alter transcription machinery recruitment or chromatin accessibility at particular DNA regions. This allows genes to become active in some developmental contexts but not others, supporting precise expression patterns as cells acquire specialized identities.
Their activity helps explain how cells with the same genetic information develop different identities. Distinct combinations of regulatory proteins and DNA control elements can produce different gene expression patterns, changing which genes are active in a given cellular context. Linking these patterns to regulatory sequences clarifies how gene control contributes to cell specialization and organismal development.
Variation or mutation in regulatory DNA can change how transcription factors and other regulatory proteins control a gene. Such changes may alter transcription initiation, chromatin accessibility, or the balance between activating and blocking influences. Studying these effects helps connect noncoding genetic differences with altered gene expression, developmental outcomes, and disease-associated processes.
Analysis can connect gene regulation with major biological processes, including cellular responses to signals, developmental patterning, and the formation of specialized cell types. It also provides a framework for investigating why expression differs among contexts and how regulatory mutations contribute to disease. In this way, cis regulatory sequences link DNA organization with observable biological outcomes.