antikodonsekvens

An antikodonsekvens is the sequence of three nucleotides found on the anticodon arm of transfer RNA (tRNA). The anticodon is complementary to a codon on messenger RNA (mRNA) and mediates the specific attachment of an amino acid to the growing polypeptide chain during translation. The triplet sequence on the tRNA reads the codon on the messenger RNA through base‑pairing rules, with the only known exception being the wobble position where non‑canonical base pairing can occur. The specificity of this interaction is a key determinant of genetic fidelity and allows the ribosome to interpret the genetic code accurately.

Each tRNA molecule is typically aminoacylated with a single amino acid by a dedicated aminoacyl‑tRNA synthetase. The anticodon sequence ensures that the tRNA recognizes the appropriate codon, and when multiple tRNAs share the same anticodon, they are collectively called isoacceptors. High‑throughput sequencing of tRNAs and the corresponding anticodon repertoire has revealed that anticodon variation contributes to post‑transcriptional regulation and cellular adaptation to stress.

In comparative genomics, conserved anticodon patterns provide insight into evolutionary relationships among organisms and can indicate the presence of translational biases. Antikodonsekvens analysis is also employed in the design of synthetic biology tools, including engineered tRNAs for incorporating non‑canonical amino acids into proteins.