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单词 Premature stop codon
释义

Premature stop codon

英语百科

Nonsense mutation

(重定向自Premature stop codon)
Selection of notable mutations, ordered in a standard table of the genetic code of amino acids.[2] Nonsense mutations are marked by red arrows.

In genetics, a nonsense mutation is a point mutation in a sequence of DNA that results in a premature stop codon, or a nonsense codon in the transcribed mRNA, and in a truncated, incomplete, and usually nonfunctional protein product. It differs from a missense mutation, which is a point mutation where a single nucleotide is changed to cause substitution of a different amino acid. Some genetic disorders, such as thalassemia and DMD, result from nonsense mutations.

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