منابع مشابه
Gene decay in archaea.
The gene-dense chromosomes of archaea and bacteria were long thought to be devoid of pseudogenes, but with the massive increase in available genome sequences, whole genome comparisons between closely related species have identified mutations that have rendered numerous genes inactive. Comparative analyses of sequenced archaeal genomes revealed numerous pseudogenes, which can constitute up to 8....
متن کاملPloidy and gene conversion in Archaea.
The genome copy numbers of seven crenarchaeal species of four genera have been reported. All of them are monoploid and thus this seems to be a characteristic feature of Crenarchaeota. In stark contrast, none of six species representing six euryarchaeal genera is monoploid. Therefore Euryarchaea are typically oligoploid or polyploidy and their genome copy numbers are tightly regulated in respons...
متن کاملDistance-Decay and Taxa-Area Relationships for Bacteria, Archaea and Methanogenic Archaea in a Tropical Lake Sediment
The study of of the distribution of microorganisms through space (and time) allows evaluation of biogeographic patterns, like the species-area index (z). Due to their high dispersal ability, high reproduction rates and low rates of extinction microorganisms tend to be widely distributed, and they are thought to be virtually cosmopolitan and selected primarily by environmental factors. Recent st...
متن کاملFractal Analysis of 16S rRNA Gene Sequences in Archaea Thermophiles
A nucleotide sequence can be expressed as a numerical sequence when each nucleotide is assigned its proton number. A resulting gene numerical sequence can be investigated for its fractal dimension in terms of evolution and chemical properties for comparative studies. We have investigated such nucleotide fluctuation in the 16S rRNA gene of archaea thermophiles. The studied archaea thermophiles w...
متن کاملGeneral transcription factor specified global gene regulation in archaea.
Cells responding to dramatic environmental changes or undergoing a developmental switch typically change the expression of numerous genes. In bacteria, sigma factors regulate much of this process, whereas in eukaryotes, four RNA polymerases and a multiplicity of generalized transcription factors (GTFs) are required. Here, by using a systems approach, we provide experimental evidence (including ...
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: Archaea
سال: 2007
ISSN: 1472-3646,1472-3654
DOI: 10.1155/2007/165723