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lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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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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Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
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The New RNA World: Growing Evidence for Long Noncoding RNA Functionality.

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Long noncoding RNAs (lncRNAs) possess unique structural and interaction capabilities, including sequence-specific DNA binding. This has been a key driver of metazoan evolution and diversity through gene amplification.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Evolutionary Biology

Background:

  • Recent years show increased research into noncoding RNAs (ncRNAs).
  • Significant debate persists regarding the functional roles and mechanisms of action for many ncRNAs.
  • This article focuses on long noncoding RNAs (lncRNAs), addressing current knowledge gaps.

Purpose of the Study:

  • To clarify the functionality and mechanisms of action of ncRNAs, particularly lncRNAs.
  • To highlight the underappreciated ability of RNAs to interact sequence-specifically with DNA.
  • To explore the evolutionary significance of ncRNA gene amplification.

Main Methods:

  • Review and synthesis of existing literature on ncRNA function and evolution.
  • Emphasis on the structural and interactive properties of RNA molecules.
  • Analysis of evidence supporting RNA-DNA sequence-specific interactions.

Main Results:

  • RNAs exhibit unique structural versatility and can interact with nucleic acids and proteins.
  • Sequence-specific RNA-DNA interactions represent a powerful, yet overlooked, functional capability.
  • Evidence suggests rapid acquisition and functional diversification of noncoding genes in testes.

Conclusions:

  • The unique properties of ncRNAs, especially lncRNAs, offer significant functional potential.
  • RNA-DNA sequence-specific interactions are crucial for understanding ncRNA roles.
  • Noncoding gene amplification, particularly in testes, is a major evolutionary force in metazoans.