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Translation - Coggle Diagram
Translation
transfer
RNA
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-
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role
- pick up specific aa
- carry to ribosome
- to bond into polypeptide chain
- in correct sequence according to mRNA
Definition
- process of 'reading' mRNA
- to assemble correct sequence of amino acids
- to create primary structure of protein
Ribosome
structure
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2 binding sites
P (peptidyl site)
- binds the tRNA with the
growing peptide chain
A (aminoacyl site)
- accepts incoming tRNA’s
with their associated amino
as many ribosomes pass along mRNA
- PROCESS MORE EFFICIENT
- allows many polypeptides to be formed
from single mRNA strand
- in short time
-
1. Ribosome
- attaches to mRNA strand
- first codon = start codon
- attaches into P site
- second codon attaches to A site
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2. tRNA molecules
- with appropriate anticodons
- bind with codons on mRNA
- (hydrogen bonds form between complementary bases)
- carry specific amino acids
3. Peptide bond
- formed through condensation reactions
- between 2 amino acids
- in 2 tRNA molecules in A+P site
- using ATP
5. Third tRNA
- third tRNA molecule arrives
- with complementary anticodon to 3rd codon on mRNA chain
- brings another amino acid into place
- alongside aa in P site
- form peptide bond (condensation)
- polypeptide chain lengthened
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7. Stop codon
- when reached, terminate translation
- why? (no tRNA with anticodon complementary to codon)
- polypeptide chain released