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Related Concept Videos

Cis-regulatory Sequences02:02

Cis-regulatory Sequences

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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...
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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Cis-Regulatory Elements in Mammals.

Xingyu Liu1, Mengjie Chen1, Xiuwen Qu1

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Exploring enhancers and promoters, crucial for gene transcription, offers insights into mammalian development, evolution, and disease. Understanding these cis-regulatory elements enhances knowledge of gene regulatory networks.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Developmental Biology

Background:

  • Enhancers and promoters are cis-regulatory elements that control gene transcription through molecular interactions.
  • These elements influence organismal phenotypes and are key to understanding gene regulatory networks.
  • Dysregulation of enhancers and promoters is implicated in various mammalian diseases.

Purpose of the Study:

  • To provide a comprehensive overview of enhancers and promoters.
  • To explore their structural attributes, detection methods, and mechanisms of action.
  • To review their roles in mammalian development, evolution, and disease.

Main Methods:

  • Literature review of intrinsic structural attributes.
  • Analysis of detection methodologies for enhancers and promoters.
  • Examination of operational mechanisms and investigative techniques.

Main Results:

  • Detailed overview of enhancer and promoter structures and functions.
  • Elucidation of novel investigative techniques for studying these elements.
  • Summary of current research on their roles in development, evolution, and disease.

Conclusions:

  • In-depth understanding of enhancers and promoters is vital for advancing knowledge in mammalian biology.
  • Future research should focus on innovative techniques to further explore their complex roles.
  • This review highlights prospective research avenues for gene regulation studies.