title: Analysis of synonymous codon usage in Aeropyrum pernix K1 and other Crenarchaeota microorganisms.
abstract: In this study, a comparative analysis of the codon usage bias was performed in Aeropyrum pernix K1 and two other phylogenetically related Crenarchaeota microorganisms (i.e., Pyrobaculum aerophilum str. IM2 and Sulfolobus acidocaldarius DSM 639). The results indicated that the synonymous codon usage in A. pernix K1 was less biased, which was highly correlated with the GC(3S) value. The codon usage patterns were phylogenetically conserved among these Crenarchaeota microorganisms. Comparatively, it is the species function rather than the gene function that determines their gene codon usage patterns. A. pernix K1, P. aerophilum str. IM2, and S. acidocaldarius DSM 639 live in differently extreme conditions. It is presumed that the living environment played an important role in determining the codon usage pattern of these microorganisms. Besides, there was no strain-specific codon usage among these microorganisms. The extent of codon bias in A. pernix K1 and S. acidocaldarius DSM 639 were highly correlated with the gene expression level, but no such association was detected in P. aerophilum str. IM2 genomes.
authors.affiliation: State Key Laboratory of Bioelectronics, Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.forename: Xiao
authors.initials: X
authors.lastname: Sun
authors.forename: Zuhong
authors.initials: Z
authors.lastname: Lu
mesh_terms: D041522:Aeropyrum / Q000235:genetics*; D003062:Codon / Q000032:analysis / Q000235:genetics*; D019615:Crenarchaeota / Q000235:genetics*; D019143:Evolution, Molecular; D017343:Genes, Plant; D005815:Genetic Code / Q000235:genetics* / Q000502:physiology; D020745:Genome, Archaeal; D018745:Genome, Plant
chemical_list: D003062:Codon