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Chapitre 10

Traduction : de l'ARN à la protéine

Traduction
Traduction
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes ...
Ribosomes
Ribosomes
Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that ...
Activation de l'ARNt
Activation de l'ARNt
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 ...
Initiation de la traduction
Initiation de la traduction
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are ...
Terminaison de la traduction
Terminaison de la traduction
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the ...
Améliorer la précision de la traduction
Améliorer la précision de la traduction
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single ...
Dégradation des ARNm non-sens
Dégradation des ARNm non-sens
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual ...
Chaperones moléculaires et repliement des protéines
Chaperones moléculaires et repliement des protéines
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form ...
Le protéasome
Le protéasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the ...
Dégradation régulée des protéines
Dégradation régulée des protéines
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a ...
Protéines : des gènes à la dégradation
Protéines : des gènes à la dégradation
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This ...
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