Video: Yuav ua li cas ua ntej mRNA spliced?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Eukaryotic ua ntej - mRNAs feem ntau suav nrog intros. Introns raug tshem tawm los ntawm RNA ua nyob rau hauv uas lub intron yog looped thiab txiav tawm ntawm exons los ntawm snRNPs, thiab cov exons yog spliced ua ke los tsim tus txhais lus mRNA . Lub intron yog excised, thiab exons yog ces spliced ua ke.
Ntawm no, mRNA spliced li cas?
RNA splicing , nyob rau hauv molecular biology, yog ib daim ntawv ntawm RNA ua nyob rau hauv uas ib tug tshiab ua precursor messenger RNA (pre- mRNA ) cov ntawv sau tau hloov pauv mus rau tus neeg xa xov liaison RNA ( mRNA ). Thaum splicing , introns (Cov cheeb tsam tsis-coding) raug tshem tawm thiab exons (Coding Regions) tau koom ua ke.
Qhov thib ob, peb txoj kev ua ntej mRNA yog dab tsi?
- Pre-mRNA ua. Lub eukaryotic pre-mRNA tau dhau los ua ntau yam ua ntej nws npaj tau muab txhais.
- 5′ Capping.
- 3′ Poly-A Tail.
- Pre-mRNA Splicing.
- Discovery ntawm Introns.
- Intron Processing.
Hais txog qhov no, ua ntej mRNA tsim li cas?
Ua ntej - mRNA yog thawj daim ntawv ntawm RNA tsim los ntawm transcription nyob rau hauv protein synthesis. Ua ntej tag nrho cov introns yuav tsum tau muab tshem tawm los ntawm transcribed RNA los ntawm cov txheej txheem hu ua splicing. Ua ntej lub RNA yog npaj rau export, ib tug Poly(A) tail yog ntxiv rau 3' kawg ntawm lub RNA thiab 5 'cap ntxiv rau 5' kawg.
Yuav ua li cas thaum splicing?
RNA splicing yog kev tshem tawm ntawm introns thiab koom nrog exons hauv eukaryotic mRNA. Nws kuj tshwm sim hauv tRNA thiab rRNA. Lawv nrhiav qhov kawg ntawm cov introns, txiav lawv deb ntawm exons, thiab koom nrog qhov kawg ntawm cov exons uas nyob ib sab ua ke. Thaum tag nrho cov noob yog devoid ntawm nws introns, tus txheej txheem ntawm RNA splicing ua tiav.
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