Nonsense suppressor

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Nonsense suppressors change the effects of nonsense mutations by altering how stop codons are read. The largest class of nonsense suppressors are mutations in Category:tRNA genes that alter the codon-anticodon interaction to allow a stop codon to be read by that tRNA. This will only suppress the mutation if the amino acid inserted restores a functional protein product.

gene synonyms tRNA affected aa inserted

serU, serV

Su-1, SuI, ftsM, su_1, supD, supH, su1

tRNASer(CGA) (Serine tRNA2)

Serine [1]

glnX, glnV

Su2, Su_II, supE

tRNAGln(CUG) (Glutamine tRNA2)

Glutamine[2]

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  1. ↑ WEIGERT, MG & GAREN, A (1965) AMINO ACID SUBSTITUTIONS RESULTING FROM SUPPRESSION OF NONSENSE MUTATIONS. I. SERINE INSERTION BY THE SU-1 SUPPRESSOR GENE. J. Mol. Biol. 12 448-55 PubMed
  2. ↑ Weigert, MG et al. (1965) Amino acid substitutions resulting from suppression of nonsense mutations. II. Glutamine insertion by the Su-2 gene; tyrosine insertion by the Su-3 gene. J. Mol. Biol. 14 522-7 PubMed