関連する実験動画
Updated: Aug 9, 2026

15:33
Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
Published on: August 13, 2013
まとめ
アデノウイルス-2の転写は,動的調節を示しています. 感染の初期に,終結とRNA処理は異なっており,L1mRNAの産生を変化させることで遺伝子発現に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- ウイルス学 ウイルス学 ウイルス学
- 遺伝子発現の規制について
背景:
- アデノウイルス-2 メジャー・ラット・トランスクリプション・ユニットは,ウイルスの複製に不可欠です.
- 感染の異なる段階におけるその活動を理解することは,ウイルスの遺伝子発現戦略を解読する鍵となる.
研究 の 目的:
- アデノウイルス-2 メジャー・ラット・トランスクリプション・ユニットの時間的調節を調査する.
- 感染の初期と後期段階で,転写終止とRNA処理のイベントがどのように変化するか解明する.
主な方法:
- 異なる感染時間点におけるアデノウイルス-2の転写パターンの分析.
- ポリアデニレーション部位の選択とスプライシングを含むRNA処理イベントの検査.
主要な成果:
- 主要な後期転写ユニットは,他の初期ユニットと同様に,感染の初期に活発です.
- トランスクリプトの終結は,感染初期に早めに (マップ位置60-70) 発生するが,感染後期にはマップ位置99で発生する.
- RNA処理は,遅い感染とは異なり,早期感染中に1つのL1mRNAを生成します.
結論:
- トランスクリプションの終結,ポリアサイト選択,およびスプライシングは,アデノウイルス-2感染中に動的に調節されます.
- RNAの処理と終結におけるこれらの変化は,細胞状態に基づいてウイルスの遺伝子発現の制御に寄与する.
関連する概念動画
Eukaryotic RNA Polymerases
RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
All three eukaryotic RNAPs require specific transcription factors, of which the...
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription Attenuation in Prokaryotes
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.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
What is Gene Expression?
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...
Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...

