Distribution of IS91 family insertion sequences in bacterial genomes: evolutionary implications
نویسندگان
چکیده
منابع مشابه
Distribution of IS91 family insertion sequences in bacterial genomes: evolutionary implications.
IS91 is the prototype element of a family of bacterial insertion sequences that transpose by a rolling-circle mechanism. Although previously considered a rarity among IS elements, many new examples have been identified by sequence analysis of bacterial genomes. In this work we provide a summary of occurrences of IS91-like sequences in the GenBank database, characterise the genetic organisation ...
متن کاملCompositional biases of bacterial genomes and evolutionary implications.
We compare and contrast genome-wide compositional biases and distributions of short oligonucleotides across 15 diverse prokaryotes that have substantial genomic sequence collections. These include seven complete genomes (Escherichia coli, Haemophilus influenzae, Mycoplasma genitalium, Mycoplasma pneumoniae, Synechocystis sp. strain PCC6803, Methanococcus jannaschii, and Pyrobaculum aerophilum)....
متن کاملEvolutionary Effects of Translocations in Bacterial Genomes
It has become clear that different genome regions need not evolve uniformly. This variation is particularly evident in bacterial genomes with multiple chromosomes, in which smaller, secondary chromosomes evolve more rapidly. We previously demonstrated that substitution rates and gene dispensability were greater on secondary chromosomes in many bacterial genomes. In Vibrio, the secondary chromos...
متن کاملCauses of insertion sequences abundance in prokaryotic genomes.
Insertion sequences (ISs) are the smallest and most frequent transposable elements in prokaryotes where they play an important evolutionary role by promoting gene inactivation and genome plasticity. Their genomic abundance varies by several orders of magnitude for reasons largely unknown and widely speculated. The current availability of hundreds of genomes renders testable many of these hypoth...
متن کاملFamily-specific scaling laws in bacterial genomes
Among several quantitative invariants found in evolutionary genomics, one of the most striking is the scaling of the overall abundance of proteins, or protein domains, sharing a specific functional annotation across genomes of given size. The size of these functional categories change, on average, as power-laws in the total number of protein-coding genes. Here, we show that such regularities ar...
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: FEMS Microbiology Ecology
سال: 2002
ISSN: 0168-6496,1574-6941
DOI: 10.1111/j.1574-6941.2002.tb01020.x