Unusual codon usage bias in low expression genes of Vibrio cholerae

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Unusual codon usage bias in low expression genes of Vibrio cholerae

Positive correlation between gene expression and synonymous codon usage bias is well documented in the literature. However, in the present study of Vibrio cholerae genome, we have identified a group of genes having unusually high codon usage bias despite being low potential expressivity. Our results suggest that codon usage in lowly expressed genes might also be selected on to preferably use no...

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The effect of neighbouring bases on the usage of synonymous codons in genes with low codon usage bias in yeast and E. coli is examined. The codon adaptation index is employed to identify a group of genes in each organism with low codon usage bias, which are likely to be weakly expressed. A similar pattern is found in complementary sequences with respect to synonymous usage of A vs G or of U vs ...

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More Codon Usage Bias

χ measure. In statistics, the χ statstic computes how different the distribution of values is from a uniform distribution. Let d = c1 . . . cN be a DNA string in nucleotide alphabet, and let L be the total number of codons in d that are not Methinine or Tryptophan (the number does include the stop codons though). Let a be a k-degenerate amino acid, and let La be the total number of codons codin...

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ژورنال

عنوان ژورنال: Bioinformation

سال: 2008

ISSN: 0973-8894,0973-2063

DOI: 10.6026/97320630003213