Role of Premature Stop Codons in Bacterial Evolution
نویسندگان
چکیده
منابع مشابه
Role of premature stop codons in bacterial evolution.
When the stop codons TGA, TAA, and TAG are found in the second and third reading frames of a protein-encoding gene, they are considered premature stop codons (PSC). Deinococcus radiodurans disproportionately favored TGA more than the other two triplets as a PSC. The TGA triplet was also found more often in noncoding regions and as a stop codon, though the bias was less pronounced. We investigat...
متن کاملEvolution of the genetic code. Emergence of stop codons
In my previous study [2] I wrote that the UG base doublet, unlike GU, CU and UC, acquired its meaning after the emergence of adenine. Thus, in my opinion, this base doublet is the first version of a stop codon. In the table of the universal genetic code, this base doublet is a stop codon; moreover, this base doublet encodes cysteine and tryptophan. What could cause the emergence of non-encoding...
متن کاملSignificance of premature stop codons in env of simian immunodeficiency virus.
The location of the translational termination codon for the transmembrane protein (TMP) varies in three infectious molecular clones of simian immunodeficiency virus from macaques (SIVmac). The SIVmac251 and SIVmac142 infectious clones have premature stop signals that differ in location by one codon; transfection of these DNAs into human HUT-78 cells yielded virus with a truncated TMP (28 to 30 ...
متن کاملLeaky termination at premature stop codons antagonizes nonsense-mediated mRNA decay in <i>S. cerevisiae</i>
The Nonsense-Mediated mRNA Decay (NMD) pathway mediates the rapid degradation of mRNAs that contain premature stop mutations in eukaryotic organisms. It was recently shown that mutations in three yeast genes that encode proteins involved in the NMD process, UPF1, UPF2, and UPF3, also reduce the efficiency of translation termination. In the current study, we compared the efficiency of translatio...
متن کاملSuppression of Premature Stop Codons for the Treatment of a Subset of Patients with Genetic Disorders
Recent work has led to the genetic understanding of an increasingly large number of neurological disorders that affect the nervous system of children, resulting in symptoms such as mental retardation, autistic symptoms, cerebral palsy, or seizures. These conditions are extremely heterogeneous genetically, meaning that large numbers of genes appear to be essential for normal nervous system funct...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2008
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.00682-08