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Related Concept Videos

RNA Polymerase II Accessory Proteins02:36

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Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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Transcription Attenuation in Prokaryotes02:42

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Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
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Nucleic Acid Structure01:25

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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Ataxin-2: a powerful RNA-binding protein.

Lulu Li1,2, Meng Wang3, Lai Huang2

  • 1School of Basic Medical Science, Southwest Medical University, Luzhou, 646000, China.

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|July 22, 2024
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Ataxin-2 (ATXN2) is crucial in neurodegenerative diseases and cancers by regulating gene expression. Understanding ATXN2

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ATXN2CancersMetabolism of RNANeurodegenerative diseasesRNA binding protein

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Area of Science:

  • Molecular Biology
  • Neuroscience
  • Oncology

Background:

  • Ataxin-2 (ATXN2) initially identified in spinocerebellar ataxia type 2 (SCA2).
  • ATXN2 is implicated in diverse neurodegenerative diseases beyond SCA2.
  • Emerging evidence links ATXN2 to various cancer types.

Purpose of the Study:

  • To review the multifaceted roles of ATXN2 in human diseases.
  • To explore ATXN2's molecular and cellular pathways in disease pathogenesis.
  • To highlight ATXN2's function in post-transcriptional gene regulation.

Main Methods:

  • Literature review of ATXN2's role in neurodegeneration and cancer.
  • Analysis of ATXN2 interactions with RNA-binding proteins (RBPs).
  • Examination of ATXN2's involvement in gene expression regulation.

Main Results:

  • ATXN2 regulates post-transcriptional gene expression through interactions with RBPs.
  • ATXN2 is a significant factor in the pathogenesis of multiple cancers, including breast, gastric, and colon cancer.
  • ATXN2's functions are critical across a spectrum of human diseases.

Conclusions:

  • ATXN2 plays a vital, complex role in both neurodegenerative diseases and cancer.
  • Further research into ATXN2's regulatory functions is warranted.
  • Understanding ATXN2 mechanisms offers insights into disease pathology.