tRNA’s main function is to act as an adapter in protein synthesis, bringing the correct amino acid to the ribosome according to the codons on mRNA. In other words, it “reads” the genetic code and helps build proteins in the right sequence.

Core function of tRNA

  • tRNA (transfer RNA) carries specific amino acids to the ribosome during translation, the protein-making stage.
  • Each tRNA has an anticodon that pairs with a complementary codon on mRNA, ensuring each amino acid is added in the correct order.
  • By matching codons and delivering amino acids, tRNA enables the formation of a growing polypeptide chain that becomes a functional protein.

How tRNA works step by step

  1. A tRNA molecule is “charged” with its specific amino acid by an enzyme called aminoacyl‑tRNA synthetase.
  1. The anticodon loop of tRNA base‑pairs with the matching codon on the mRNA strand in the ribosome.
  1. The ribosome links the amino acid from the tRNA to the growing polypeptide chain, and the tRNA then leaves to be reused.

Extra roles beyond translation

  • Beyond its classic role in translation, tRNA and its derivatives can help regulate gene expression and cellular stress responses in both prokaryotes and eukaryotes.
  • Aminoacyl‑tRNAs can also serve as substrates in other processes like non‑ribosomal peptide formation and certain biosynthetic pathways.

TL;DR: tRNA’s key job is to match mRNA codons with the right amino acids so proteins are built accurately during translation.

Information gathered from public forums or data available on the internet and portrayed here.