translation Flashcards
where is the ribosome binding site located?
in the 5’ UTR
tRNA structure
3 stem loops, single stranded region (AA attaches), anticodon on loop 2
how are tRNAs charged?
enzyme amino-acyl tRNA synthetases
where are ribosomal subunits made?
nucleus
where are ribosomal subunits assembled?
cytoplasm
where is the exit site of the polypeptide
50S subunit
what is necessary for initiation?
initiation factors and energy supply from GTP
initiation differences in eukaryotes
instead of RBS there is guanosine cap that promotes binding of mRNA and subunit, start codon variable distance from RBS, start tRNA is methionine instead of formyl methionine in bacteria
what is the peptidyl transfer reaction?
polypeptide in the P site is transferred to AA in A site by peptidyl transferase
what are stop codons recognized by?
release factors