Conspiracy in bacterial genomes

Details Conspiracy in bacterial genomes Conspiracy in bacterial genomes

2005-07-20

arxiv.org/abs/q-bio/0507030v2

Biology

Quantitative Biology

Genomics

revised version: introduction and conclusion enhanced, references added, figures added, some tables removed

Scientific paper

10.1016/j.physa.2006.02.008

The rank ordered distribution of the codon usage frequencies for 123 bacteriae is best fitted by a three parameters function that is the sum of a constant, an exponential and a linear term in the rank n. The parameters depend (two parabolically) from the total GC content. The rank ordered distribution of the amino acids is fitted by a straight line. The Shannon entropy computed over all the codons is well fitted by a parabola in the GC content, while the partial entropies computed over subsets of the codons show peculiar different behavior, exhibiting therefore a first conspiracy effect. Moreover the sum of the codon usage frequencies over particular sets, e.g. with C and A (respectively G and U) as i-th nucleotide, shows a clear linear dependence from the GC content, exhibiting another conspiracy effect.

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