nonsense mutation

(redirected from Premature stop codon)
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nonsense mutation

[′nän‚səns myü‚tā·shən]
(cell and molecular biology)
A mutation that changes a codon that codes for one amino acid into a codon that does not specify any amino acid (a nonsense codon).
References in periodicals archive ?
2LAD-III, the most recently described type in which the integrins on bone marrow-derived leukocytes and platelets fail to function due to mutation in the FERMT3 gene coding for the kindlin-3 protein, thus introducing a premature stop codon resulting in a non-functioning protein.
Direct sequencing of all 11 exons of PRKAR1A of this patient identified a 88 A to G mutation, which changes the initiator ATG to a GTG codon, abolishes the translational start codon but does not introduce a premature stop codon [Figure 1]e.
In our study, the premature stop codon results in the elimination of catalytic and tetramerization domains which is conducive to the activation of NMD mechanism in the nucleus and this would eliminate mRNA and consequently impairs the function of the PAH gene and makes it a null allele (19,20) (Figure 4).
3) that is a frameshift mutation and expected to result in a premature stop codon.
Nonsynonymous changes are colored according to the new amino acid state where blue is a positive amino acid, red is a negative amino acid, orange is a polar amino acid, green is a hydrophobic amino acid, gray is a neutral change to a similar amino acid, and black indicates a premature stop codon.
A Q356X heterozygous mutation was found in exon 6 of the CYP11B1 gene, which has previously been described in patients with an 11-beta-hydroxylase deficiency, and an R384X heterozygous alteration was found in exon 7 that results in a premature stop codon, causing the formation of a truncated protein without biological activity (Figs.
At a protein level, this tetranucleotide deletion results in a disruption of the amino acid reading frame that causes arginine to be replaced by phenylalanine at position 358, with a resulting premature stop codon at position 373, p.
We report 3 cases with 1 homozygous and 2 heterozygous mutations at codon 37 causing a premature stop codon.
Evidence against either a premature stop codon or the absence of Ob gene mRNA in human obesity.
A premature stop codon orders a cell to stop reading the genetic instructions partway through the process, resulting in the creation of an incomplete, shortened protein.
Other possible therapies include the role of PTC124, an agent which allows 'read through' of a premature stop codon and the production of dystrophin.
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