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人間のアルファおよびベータグロービンメッセンジャーRNAの3'端末配列:ウサギのグロービンメッセンジャーRNAとの比較
Cell
|December 1, 1976
まとめ
研究者は,ヒトのアルファおよびベータグロービンメッセンジャーRNA (mRNA) の3'非コーディング領域をシーケンス化しました. これらの配列は,ウサギのmRNAと有意な同質性を示し,グロービンの遺伝子構造を理解するのに役立ちます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- バイオケミストリー バイオケミストリー
背景:
- 人間のアルファとベータグロービンのmRNAは,酸素輸送に不可欠です.
- mRNAのノンコーディング領域を理解することは,遺伝子調節の洞察にとって不可欠です.
研究 の 目的:
- 人間のアルファおよびベータグロービンのmRNAの3'ノンコーディング領域の核酸配列を決定する.
- これらの配列を,他の種からの既知のグロービンmRNA配列と比較する.
主な方法:
- 正常およびタラセミアヒトグロービンのmRNAから得られた補完DNA (cDNA) の配列解析.
- cDNA分析のためのエンドヌクレアゼIV消化と限られた合成手順を使用しました.
主要な成果:
- 人間のアルファおよびベータグロービンのmRNAの3'ポリ (A) に隣接する43および70のヌクレオチドの配列が確立されています.
- 人間とウサギのグロービンのmRNA配列の83%のホモロジーを特定しました.
- アルファグロービンのmRNA配列の一部が,ヒトアルファグロービンのカルボキシ末端と一致することを確認しました.
結論:
- 人間のアルファグロービンmRNAの3'非コーディング領域は,正確に112のヌクレオチドです.
- 人間のアルファグロービンmRNAの5'非コーディング領域は,約50個のヌクレオチドであると推定されています.
- 比較配列分析は,グロービンのmRNA構造と進化の洞察を提供します.
関連する概念動画
Types 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...
pre-mRNA Processing
In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl guanosine). This 5’ cap helps the...
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl guanosine). This 5’ cap helps the...
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...
Transfer RNA Synthesis
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Leaky Scanning
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
Types 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...

