Context-driven discovery of gene cassettes in mobile integrons using a computational grammar
نویسندگان
چکیده
منابع مشابه
Gene cassettes and cassette arrays in mobile resistance integrons.
Gene cassettes are small mobile elements, consisting of little more than a single gene and recombination site, which are captured by larger elements called integrons. Several cassettes may be inserted into the same integron forming a tandem array. The discovery of integrons in the chromosome of many species has led to the identification of thousands of gene cassettes, mostly of unknown function...
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Integrons were detected in 59 of 120 (49%) urinary isolates of Enterobacteriaceae by PCR using degenerate primers targeted to conserved regions of class 1, 2, and 3 integrase genes. PCR sequencing analysis of the cassette arrays revealed a predominance of cassettes that confer resistance to the aminoglycosides and trimethoprim.
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Amplification of the gene cassettes in class 1 integrons by PCR using primers in the 5 conserved segment (5 -CS) and the 3 -CS (7, 8) has been used in hundreds of studies to identify integron-associated resistance genes (Fig. 1A). Equivalent PCR primers that detect cassettes in class 2 integrons, i.e., Tn7 family transposons (18), are also widely used. The approach used to detect integrons in a...
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I ntegrons, which are natural genetic engineering platforms, can incorporate open reading frames and convert them to functional genes by ensuring correct expression. Although such integrons play a major role in multidrug resistance phenomena among gram-negative species, similar platforms occur in numerous bacterial species, where they can play other roles. Meanwhile, we have evidence suggesting...
متن کاملMobile gene cassettes and integrons: capture and spread of genes by site-specific recombination.
An integron is a genetic unit that includes the determinants of the components of a site-specific recombination system capable of capturing and mobilizing genes that are contained in mobile elements called gene cassettes. An integron also provides a promoter for expression of the cassette genes, and integrons thus act both as natural cloning systems and as expression vectors. The essential comp...
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ژورنال
عنوان ژورنال: BMC Bioinformatics
سال: 2009
ISSN: 1471-2105
DOI: 10.1186/1471-2105-10-281