کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5907649 | 1160132 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Distribution and evolution of short tandem repeats in closely related bacterial genomes
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
ژنتیک
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چکیده انگلیسی
Simultaneous identification and comparison of perfect and imperfect microsatellites within a genome is a valuable tool both to overcome the lack of a consensus definition of SSRs and to assess repeat history. Detailed analysis of the overall distribution of perfect and imperfect microsatellites in closely related bacterial taxa is expected to give new insight into the evolution of prokaryotic genomes. We have performed a genome-wide analysis of microsatellite distribution in four Escherichia coli and seven Chlamydial strains. Chlamydial strains generally have a higher density of SSRs and show greater intra-group differences of SSR distribution patterns than E. coli genomes. In most investigated genomes the distribution of the total lengths of matching perfect and imperfect trinucleotide repeats are highly similar, with the notable exception of C. muridarum. Closely related strains show more similar repeat distribution patterns than strains separated by a longer divergence time. The discrepancy between the preferred classes of perfect and imperfect repeats in C. muridarum implies accelerated evolution of SSRs in this particular strain. Our results suggest that microsatellites, although considerably less abundant than in eukaryotic genomes, may nevertheless play an important role in the evolution of prokaryotic genomes and several gene families.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 410, Issue 1, 29 February 2008, Pages 18-25
Journal: Gene - Volume 410, Issue 1, 29 February 2008, Pages 18-25
نویسندگان
Edit Kassai-Jáger, Csaba Ortutay, Gábor Tóth, Tibor Vellai, Zoltán Gáspári,