Thaum N-formylmethionine (fMet)-tRNA khi nrog P site, tRNA molecule nrog an anticodon uas koom nrog codon ntawm cov neeg nyob sib ze pib codon tuaj yeem ua ke nrog cov Ib qhov chaw ntawm 70S pib ua haujlwm.
TRNA khi rau mRNA li cas?
TRNA khi rau codons hauv mRNA li cas? Lub hauv paus ntxiv ntawm codon thiab anticodon tau tuav ua ke los ntawm hydrogen bonds, tib hom kev sib cog lus uas tuav ua ke cov nucleotides hauv DNA. Lub ribosome tsuas yog tso cai rau tRNA los khi rau mRNA yog tias nws nqa cov amino acid.
Vim li cas formyl thiaj ntxiv rau methionine?
Nyob rau hauv cov kab mob, cov protein synthesis pib nrog N-formylmethionine. Cov pawg formyl no ntawm qhov pib methionine residue yuav tsum raug tshem tawm los ntawm deformylase thiaj li methionine aminopeptidase tuaj yeem tshem tawm qhov pib methionine residue.
Txoj haujlwm twg fMet tRNA fMet ntawm qhov pib codon hauv kev txhais lus prokaryotic?
GUG thiab UUG pib codons raug lees paub los ntawm fMet-tRNAifMet anticodon (5′-CAU-3′) los ntawm "wobble" puag- pairing ntawm 1st txoj hauj lwm ntawm pib codon (NUG). Cov lus piav qhia yuav ua rau vim li cas Cov Kabmob tso cai pib los ntawm cov codons no yuav txhawj xeeb txog qhov tshwj xeeb hauv lub voj anticodon ntawm fMet-tRNAifMet.
mRNA khi rau dab tsihauv translation?
Hauv kev txhais lus, cov codons ntawm mRNA tau nyeem nyob rau hauv kev txiav txim (los ntawm 5' kawg mus rau 3' kawg) los ntawm cov molecules hu ua transfer RNAs, los yog tRNAs. Txhua tRNA muaj cov tshuaj tiv thaiv kab mob, ib txheej ntawm peb nucleotides uas khi rau qhov sib txuam mRNA codon los ntawm kev sib koom ua ke.
