Video: Dab tsi yog qhov chaw thiab P site ntawm ribosome?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub A qhov chaw yog lub ntsiab lus nkag rau aminoacyl tRNA (tshwj tsis yog thawj aminoacyl tRNA, uas nkag mus rau hauv P site ). Cov P site yog qhov twg peptidyl tRNA yog tsim nyob rau hauv lub ribosome . Thiab E qhov chaw uas yog qhov tawm qhov chaw ntawm tam sim no uncharged tRNA tom qab nws muab nws cov amino acid rau lub loj hlob peptide saw.
Ib yam li ntawd, qhov chaw P thiab qhov chaw yog dab tsi?
Cov P site , hu ua peptidyl qhov chaw , khi rau tRNA tuav cov saw polypeptide loj hlob ntawm cov amino acids. Lub A qhov chaw (tus txais qhov chaw ), khi rau aminoacyl tRNA, uas tuav cov amino acid tshiab ntxiv rau cov saw hlau polypeptide.
Tom qab ntawd, lo lus nug yog, A qhov chaw ntawm ribosome ua dab tsi? Qhov A- qhov chaw (A rau aminoacyl) ntawm a ribosome yog kev khi qhov chaw rau them t-RNA molecules thaum lub sij hawm cov protein synthesis. Ib qho ntawm peb txoj kev khi qhov chaw , cov A- qhov chaw yog thawj qhov chaw t-RNA khi thaum lub sij hawm cov txheej txheem protein synthesis, lwm ob qhov chaw ua P- qhov chaw (peptidyl) thiab E- qhov chaw (tawm).
Ua raws li qhov xav tau, P site ntawm ribosome yog dab tsi?
Cov P - qhov chaw (rau peptidyl) yog qhov thib ob khi qhov chaw rau tRNA ribosome . Lwm ob qhov chaw yog A- qhov chaw (aminoacyl), uas yog thawj khi qhov chaw hauv ribosome , thiab E- qhov chaw (tawm), thib peb. Thaum lub sij hawm txhais lus protein, lub P - qhov chaw tuav lub tRNA uas txuas nrog cov saw hlau loj hlob ntawm polypeptide.
Yuav ua li cas tshwm sim ntawm txhua ntawm peb qhov chaw hauv ribosome ib qhov chaw P thiab E?
Qhov tsis zoo ribosome muaj peb compartments: cov A qhov chaw khi cov aminoacyl tRNAs tuaj; tus P site khi tRNAs nqa cov saw polypeptide loj hlob; tus E qhov chaw tso tawm tRNAs dissociated kom lawv tuaj yeem rov qab nrog cov amino acids.
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