Download Lateral Gene Transfer in Evolution by Itay Levin, Moshe Giladi, Uri Gophna (auth.), Uri Gophna PDF

By Itay Levin, Moshe Giladi, Uri Gophna (auth.), Uri Gophna (eds.)

Although the phenomenon of lateral gene move has been identified because the 1940's, it was once the genomics period that has quite printed the level and plenty of elements of this evolutionary/genetic phenomenon. Even within the early 2000s with yet a handful of genomes on hand it turned transparent that the character of microorganisms is stuffed with genetic trade among lineages which are occasionally a long way aside. The years following this observed an explosion of genomic facts, which shook the "tree of lifestyles" and in addition raised doubts in regards to the just right species thoughts for prokaryotes. This publication makes an attempt to symbolize the many-fold contributions of LGT to the evolution of micro and, to an quantity, macro-organisms via concentrating on the components the place the Editor felt it had the most important impression: metabolic suggestions and diversifications and speciation.

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A prime example is the gene encoding glyceraldehyde 3-phosphate dehydrogenase 36 C. H. Slamovits and A. Reyes-Prieto Fig. 5 Evolutionary history of two bacterial genes acquired by dinoflagellates, tracked back to their source. This scheme represents the evolutionary events leading to the origin and present organization of the AroB and OMT genes in dinoflagellates, as inferred by Waller et al. (2006). AroB and OMT genes are encoded as two adjacent open reading frames in several cyanobacterial genomes.

Integration by these mechanisms requires little or no sequence specificity at the insertion site. A type of NHEJ known as microhomology-mediated repair, which is thought to play roles in the generation of NUMTs, requires only one to seven bases of sequence homology at the chromosomal site of insertion. This mechanism is also thought to be involved in NUPT generation [99, 114]. The proposed participation of this molecular mechanism of DNA repair in EGT entails an important evolutionary implication.

Expression of resistance in the second line is surprising because the transcripts of the resistance gene harboring the plastidic intron are not expected to produce a viable protein. After examining the transcripts generated in these plants, the authors found that, in addition to the expected, unspliced messengers, two additional shorter forms were detected. Sequencing of these molecules revealed that splicing of the intron indeed occurred, indicating that processing of plastid introns in the nucleus is possible, although in this case with low efficiency [91].

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