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Protein Synthesis

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Transcript

  • 1. Translation of the Genetic Code - Protein Synthesis
  • 2.
      • This is a molecule of messenger RNA.
    • It was made in the nucleus by transcription from a DNA molecule.
    mRNA molecule codon A U G G G C U U A A A G C A G U G C A C G U U
  • 3. A ribosome on the rough endoplasmic reticulum attaches to the mRNA molecule. A U G G G C U U A A A G C A G U G C A C G U U ribosome
  • 4. It brings an amino acid to the first three bases (codon) on the mRNA. A transfer RNA molecule arrives. The three unpaired bases (anticodon) on the tRNA link up with the codon. A U G G G C U U A A A G C A G U G C A C G U U Amino acid tRNA molecule anticodon U A C
  • 5. Another tRNA molecule comes into place, bringing a second amino acid. Its anticodon links up with the second codon on the mRNA. A U G G G C U U A A A G C A G U G C A C G U U U A C C C G
  • 6. A peptide bond forms between the two amino acids. A U G G G C U U A A A G C A G U G C A C G U U Peptide bond C C G U A C
  • 7. The first tRNA molecule releases its amino acid and moves off into the cytoplasm. A U G G G C U U A A A G C A G U G C A C G U U C C G U A C
  • 8. The ribosome moves along the mRNA to the next codon. A U G G G C U U A A A G C A G U G C A C G U U C C G
  • 9. Another tRNA molecule brings the next amino acid into place. A U G G G C U U A A A G C A G U G C A C G U U C C G A A U
  • 10. A peptide bond joins the second and third amino acids to form a polypeptide chain. A U G G G C U U A A A G C A G U G C A C G U U C C G C C G
  • 11. The polypeptide chain gets longer. The process continues. This continues until a termination (stop) codon is reached. The polypeptide is then complete. A U G G G C U U A A A G C A G U G C A C G U U G U C A C G
  • 12.