Stop codon

Stop codon
A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain. The three stop codons (in messenger RNA) are UAA, UAG, and UGA. They are also called termination codons or nonsense codons. U = uracil; A = adenine; G = guanine.

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stop codon 'stäp- n a genetic codon in messenger RNA that signals the termination of protein synthesis during translation

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termination codon any of the three codons UAA, UAG, and UGA that cause termination of the synthesis of a growing polypeptide chain and its release from the ribosome.

Medical dictionary. 2011.

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Look at other dictionaries:

  • stop codon — noun (biology) One of three specific codons which do not code for an amino acid but cause protein synthesis to stop • • • Main Entry: ↑stop …   Useful english dictionary

  • Stop codon — In the genetic code, a stop codon (or termination codon) is a nucleotide triplet within messenger RNA that signals a termination of translation.[1] Proteins are based on polypeptides, which are unique sequences of amino acids. Most codons in… …   Wikipedia

  • stop codon — noun , a sequence of three RNA nucleotides (A, C, G or U) that instruct the synthesis, or translation, of a protein to stop. The three letter stop codon sequences have been given names: UAG is amber, UGA is opal, and UAA is ochre …   Wiktionary

  • Stop-Codon — Als Stopcodon, auch Nonsense Codon wird in der Genetik ein Basentriplett (Codon) der Desoxyribonukleinsäure (DNA) beziehungsweise der Ribonukleinsäure (RNA) bezeichnet, für das keine zugehörige tRNA (Transfer RNA) vorliegt und somit den Abbruch… …   Deutsch Wikipedia

  • stop codon — A set of three nucleotides for which there is no corresponding tRNA molecule to insert an amino acid into the polypeptide chain. Protein synthesis is hence terminated and the completed polypeptide released from the ribosome. Three stop codons are …   Glossary of Biotechnology

  • stop codon — See termination codon …   Dictionary of molecular biology

  • amber stop codon — See: stop codon …   Glossary of Biotechnology

  • ochre stop codon — See: stop codon …   Glossary of Biotechnology

  • opal stop codon — See: stop codon …   Glossary of Biotechnology

  • Codon stop — Un codon stop, codon de terminaison ou codon non sens est l un des 3 codons (parmi les 64 codons du code génétique) qui marquent la fin de la traduction d un gène en protéine. Il n est en général jamais traduit car il n existe pas d ARN de… …   Wikipédia en Français

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