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Overview of Eukaryotic Gene Regulation definitions

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  • Transcription Initiation
    First step in gene expression where regulatory proteins and DNA sequences determine if a gene will be transcribed.
  • Transcription Factor
    Protein that binds specific DNA sequences to activate or suppress gene transcription, influencing gene expression.
  • Promoter
    DNA sequence near a gene that recruits proteins to start transcription, acting as a control point for gene expression.
  • Enhancer
    Regulatory DNA element that increases transcription levels, often acting from a distance relative to the gene.
  • Silencer
    DNA sequence that reduces or prevents transcription when bound by specific proteins, decreasing gene expression.
  • DNA Binding Motif
    Structural feature in proteins enabling specific attachment to DNA, crucial for gene regulation.
  • Helix-Turn-Helix
    Protein motif with two alpha helices separated by a turn, facilitating DNA binding for gene regulation.
  • Zinc Finger
    Protein structure stabilized by zinc ion, resembling a finger, that interacts with DNA to regulate genes.
  • Leucine Zipper
    Dimeric protein motif where two subunits join at leucine residues, resembling a zipper, to bind DNA.
  • Helix-Loop-Helix
    Protein motif with two helices connected by a loop, allowing DNA interaction for transcription control.
  • RNA Processing
    Modification of RNA transcripts, including capping, tailing, and splicing, to produce mature mRNA.
  • Alternative Splicing
    Process where different exon combinations from one gene create multiple protein isoforms, diversifying function.
  • RNA Interference
    Mechanism using small RNAs to degrade specific mRNA transcripts, reducing gene expression post-transcriptionally.
  • mRNA Degradation
    Regulatory process where mRNA molecules are broken down, controlling protein production and gene expression.
  • Protein Isoform
    Variant of a protein produced from the same gene via alternative splicing, potentially altering cellular function.