Video: Tom qab transcriptional gene regulation yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tshaj tawm - kev cai transcriptional . Tshaj tawm - kev cai transcriptional yog kev tswj ntawm gene qhia ntawm RNA theem, yog li ntawm qhov kev sau ntawv thiab kev txhais lus ntawm tus noob . Nws pab txhawb ntau heev rau gene qhia kev cai hla tib neeg cov ntaub so ntswg.
Nyob rau hauv no txoj kev, post translational gene regulation yog dab tsi?
Tshaj tawm - kev cai txhais lus . Tshaj tawm - kev cai txhais lus hais txog kev tswj cov qib ntawm active protein. Muaj ob peb daim ntawv. Nws yog ua los ntawm txoj kev ntawm cov xwm txheej thim rov qab ( posttranslational kev hloov kho, xws li phosphorylation lossis sequestration) lossis los ntawm kev hloov pauv tsis tau (proteolysis).
Qhov thib ob, Micrornas ua lub luag haujlwm dab tsi hauv kev tshaj tawm kev cai lij choj? Tom qab mRNA yog tsim, nws yog ces spliced mus rau hauv mRNA paub tab. Yuav muaj lwm hom mRNA paub tab. Dab tsi lub luag haujlwm ua microRNA kev ua si hauv kev tshaj tawm - kev cai transcriptional ? Ribosomes tuaj yeem thaiv los ntawm kev khi rau mRNA los ntawm kev cai proteins los yog los ntawm kev hloov kho rau poly-A tails.
Tsis tas li ntawd, yuav ua li cas gene qhia tswj tom qab transcription?
Hauv eukaryotic hlwb zoo li photoreceptors, gene qhia feem ntau tswj feem ntau nyob rau theem ntawm kev sau ntawv . Tom qab ntawd theem ntawm gene qhia tau kuj be tswj , suav nrog: RNA ua, xws li splicing, capping, thiab poly-A tail ntxiv. Messenger RNA ( mRNA ) kev txhais lus thiab lub neej nyob hauv cytosol.
Dab tsi yog 3 hom kev hloov pauv hloov pauv hloov pauv thiab lawv yog dab tsi?
Lub pre-mRNA molecule undergoes peb lub ntsiab kev hloov kho . Cov no kev hloov kho yog 5 'capping, 3 ' polyadenylation, thiab RNA splicing, uas tshwm sim hauv lub cell nucleus ua ntej RNA raug txhais.
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