関連する実験動画
Updated: Jul 14, 2026
09:40
RNAi Screening to Identify Postembryonic Phenotypes in C. elegans
Published on: February 13, 2012
Caenorhabditis elegansにおける規制的な役割を持つ小さなRNAの豊富なクラスである
N C Lau1, L P Lim, E G Weinstein
1Whitehead Institute for Biomedical Research, and Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA.
Science (New York, N.Y.)
|October 27, 2001
まとめ
研究者らは,C. elegansで55の新しいマイクロRNA (miRNA) を発見し,多様な発現パターンを明らかにした. これらの微小なRNAは,種間の保存によって証明されるように,動物の発達において広範な規制的役割を果たします.
科学分野:
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- lin-4やlet-7のような小型のタイムラルRNA (stRNA) は,C. elegans*の発達タイミングのレギュレータとして知られています.
- これらの調節性RNAは,非コーディングRNAのより大きなクラスの一部です.
研究 の 目的:
- *C. elegans*における新しいマイクロRNA (miRNA) を特定し,特徴づけること.
- これらの新たに特定されたmiRNAの発現パターンと進化的保存を調査する.
主な方法:
- 潜在的なmiRNA遺伝子を特定するためのバイオ情報分析.
- *C. elegans*の発達中のmiRNA発現パターンの実験的検証.
- 比較ゲノミクスは,他の種における潜在的なオルトログを特定するためのものです.
主要な成果:
- *C. elegans*でこれまでに未知だった55のマイクロRNA (miRNA) の特定
- これらのmiRNAの多様な発現プロファイルの実証,時間的共発現,クラスタ固有の発現,構成発現を含む.
- *ドロソフィラとヒトのゲノムにおける潜在的なmiRNAオートロゴスの特定.
結論:
- マイクロRNA (miRNA) は,動物の発達において重要な役割を担う,大規模な規制RNAのクラスを表しています.
- ミクロRNAの豊富さ,多様な発現パターン,および進化的保存は,動物種間で広範な規制機能を示唆しています.
関連する概念動画
01:23Types of RNA
Overview
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.
RNA...
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.
RNA...
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
01:20Types of RNA
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 regulating 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.
RNA Performs Diverse...
RNA Performs Diverse...
02:30Small interfering RNAs (siRNA)
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
01:29Translational Regulation
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...