Post transcriptional modification refers to the process by which, in eukaryotic cells pre-mRNA is converted into messenger RNA (mRNA). This process is vital for the efficient and correct translation of the genome by ribosomes and for the export of the mRNA from the nucleus for translation. Kingdoms Eukaryotes are organisms with complex cells, in which the genetic material is organized into membrane-bound nuclei. ... The life cycle of an mRNA in a eukaryotic cell. ... Translation is an activity comprising the interpretation of the meaning of a text in one language — the source text — and the production of a new, equivalent text in another language — called the target text, or the translation. ... Figure 1: Ribosome structure indicating small subunit (A) and large subunit (B). ... Nucleus can mean: The Nuclear Envelope The nucleus is enveloped by a pair of membranes enclosing a lumen that is continuous with that of the endoplasmic reticulum. ...
Not what your looking for? Did you mean: posttranslational modification Posttranslational modification means the chemical modification of a protein after its translation. ...
There are three main forms of post transcriptional modification:
In genetics, splicing is a modification of genetic information after transcription, in which introns are removed and exons are joined. ... A spliceosome is a complex of RNA and many protein subunits, that remove the non-coding introns from unprocessed mRNA. The mRNA of prokaryotes is simpler, and they do not have introns, so only eukaryotes have spliceosomes. ... A 5 cap (also called an RNA cap, an RNA 7-methylguanosine cap or an RNA m7G cap) is a modified guanine nucleotide that has been added to the front (5 end) of the messenger RNA after transcription. ... Polyadenylation is the covalent linkage of a polyadenylyl moiety to a messenger RNA molecule. ...
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messenger RNA translation The life cycle of an mRNA in a eukaryotic cell. ... Translation is an activity comprising the interpretation of the meaning of a text in one language — the source text — and the production of a new, equivalent text in another language — called the target text, or the translation. ...
Post Transcriptional Modification
Transcription | Post transcriptional modification | RNA splicing | Polyadenylation | 5' cap Transcription may be one of the following: In linguistics, transcription is the conversion of spoken words into written language. ... RNA splicing is the excision of introns from RNA during the formation of mRNA and the removal of introns from mRNA precursors and the reattachment or annealing of exons. ... Polyadenylation is the covalent linkage of a polyadenylyl moiety to a messenger RNA molecule. ... A 5 cap (also called an RNA cap, an RNA 7-methylguanosine cap or an RNA m7G cap) is a modified guanine nucleotide that has been added to the front (5 end) of the messenger RNA after transcription. ...
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