An analysis of the phenomenon of codon bias
Codon usage bias not only plays an important regulatory role at the level of gene expression, but also helps in improving the accuracy and efficiency of translation.
Several software packages are available online for this purpose refer to external links. Several studies have shown that viral codon frequencies tend to undergo evolutionary pressure for specific CUB; among others, it was suggested that viral CUB is under selection for improving the viral fitness, and in specifically the viral gene expression [ 11 — 33 ].
It also suggests that selection is generally weak, but that selection intensity scales to higher expression and more functional constraints of coding sequences.
Correlation between GC12 and GC3 in orthologous peramine-coding sequences.
Codon usage table
The analysis of ribosome profiling data revealed that the codon decoding rates of viral genes tend to correlate with their expression levels [ 17 ]. In addition, codon usage bias plays an important role in gene expression. Codon usage bias not only plays an important regulatory role at the level of gene expression, but also helps in improving the accuracy and efficiency of translation. Results The research outline of the study is described in Fig. CAI was positively correlated with GC2 content Table 6 , therefore GC2 content may be affecting gene expression, and higher GC2 content could increase expression of peramine-coding genes. Correlation analysis between CAI and coding sequence architecture features in orthologous peramine-coding sequences. In the seven genomes analyzed, codon usage was biased in highly expressed coding sequences CDSs with shorter length and higher GC content. GC3s Wright,
Correlation analyses were executed in JMP 9. If codons are constrained by neutral selection pressure, genes can be located on one curve line in the ENC-plot a plot of ENC vs.
Codon bias and heterologous protein expression
Several studies have shown that viral codon frequencies tend to undergo evolutionary pressure for specific CUB; among others, it was suggested that viral CUB is under selection for improving the viral fitness, and in specifically the viral gene expression [ 11 — 33 ]. This phenomenon is also known as synonymous codon usage. Introduction The genetic code constitutes of 64 triplet codons encoding for 20 amino acids, with synonymous codons coding for the same amino acid. In the current study, we aimed at understanding the way evolution shapes the codon distribution in early vs. Most previous studies deal with the relatively smaller set of Mycobacterium tuberculosis isolates [ 15 , 16 ] or the isolates from one area [ 17 , 18 ]. Nevertheless, GC2 content plays a crucial role in influencing gene expression in cereal species Poaceae Chakraborty and Paul, We next analyzed codon usage bias in orthologous peramine-coding genes.
Kawabe and Miyashita demonstrated that if GC content in synonymous codon GC3s values across genes are narrow or broad, natural selection or mutation pressure may shape codon usage, respectively. Codon usage in noncoding DNA regions can therefore play a major role in RNA secondary structure and downstream protein expression, which can undergo further selective pressures.
Identification of Alkaloid-Coding Genes Gene families contain gene clusters that are a set of homologous genes within one organism. Nucleic Acids Res.
based on 76 review