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Organization of Genes02:07

Organization of Genes

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Overview
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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
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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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RNA Structure01:19

RNA Structure

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The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
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Updated: Jun 5, 2025

CRISPR-Mediated Reorganization of Chromatin Loop Structure
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ループをループする神経の遺伝子

Kyle S Czarnecki1, Elizabeth A Heller1

  • 1Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA, USA.

Science (New York, N.Y.)
|December 12, 2024
PubMed
まとめ
この要約は機械生成です。

非コーディングRNAは 薬物やストレスに対する 行動反応に関与する遺伝子を制御します この発見は 依存症やストレス関連の障害の 背後にある分子メカニズムに 新たな洞察をもたらします

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関連する実験動画

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科学分野:

  • 神経科学
  • 分子生物学
  • 遺伝学

背景:

  • 遺伝子の発現は,非コーディングRNAを含む様々な要因によって厳密に規制されています.
  • 特定の遺伝子の不調は 薬物やストレスによって引き起こされるような 複雑な行動に結びついています

研究 の 目的:

  • 薬物およびストレス誘発行動に関連する遺伝子の発現を制御するノンコーディングRNAの役割を調査する.

主な方法:

  • 非コーディングRNAを特定し特徴づけるために分子生物学技術を活用した.
  • 非コーディングRNAが遺伝子発現に与える影響を評価するために遺伝子操作を行いました.
  • 薬物とストレス刺激に対する行動の結果を分析した.

主要な成果:

  • 重要な遺伝子の発現を直接調節する特定のノンコーディングRNAを特定した.
  • 遺伝子の発現に影響し,結果的に行動反応に影響する.
  • 非コーディングRNAの活動と相関する薬物およびストレス誘発行動の有意な変化が観察されました.

結論:

  • 非コーディングRNAは,行動制御に関連する遺伝子発現を調節する上で重要な役割を果たします.
  • この規制メカニズムは,薬物依存症やストレス反応を伴う状態を理解し,治療するための潜在的なターゲットです.