By Peter Mullany
This e-book presents an in-depth research of the mechanisms and organic results of genome rearrangements in micro organism. Genome rearrangements are due to the the activities of discrete genetic parts reminiscent of conjugative transposons, plasmids, phage, and non-conjugative transposons. micro organism additionally comprise structures to mediate genetic rearrangements corresponding to the final recombination pathway and really good endogenous recombination mechanisms. The organic results of those rearrangements are far-reaching and effect on bacterial virulence, antibiotic resistance and the power of micro organism to prevent the attentions of the host immune process (e.g. antigenic variation). those rearrangements additionally give you the uncooked fabric on which ordinary choice can act. each one bankruptcy examines the mechanisms desirous about genome rearrangements and the direct organic outcomes of those occasions. This publication is written through best study staff and is a useful source for graduate scholars and researchers during this box.
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Additional info for The Dynamic Bacterial Genome (Advances in Molecular and Cellular Microbiology)
Interestingly, although RuvA and RuvB are almost universal among eubacteria, the RuvC element, required to cleave the HJ, is absent in all low G+C gram-positive bacteria. Interestingly, the RecU protein of B. 1, so that it may indeed constitute a functional analog of RuvC in this branch. The mmsA gene of S. pneumoniae encodes an ortholog of RecG, which has also similar biochemical characteristics (Hedayati, Steffen, and Bryant, 2002). , 1996). RecG is found in 43 of the 50 sequenced genomes, and absent mostly in obligate parasites.
Whether this ORF encodes an addB-like function is an open question. In addition, a phylogenetic tree of AddA (as presented in the page of AddA orthologs, COG number 1074) shows that all AddA-orphan species form a group separate from the species containing both AddA and AddB. For these reasons, I propose to group such bacterial species into a subcategory IIB. The RecFOR complex ` petit marie-agnes 20 Bona fide orthologs of RecF, RecO, and RecR have been described in B. subtilis. Mutants in each of these genes behave similarly and define an epistatic group, as in E.
More recently, Rad52, Rad55, and Rad57 proteins were proposed to act in a way parallel to the RecFOR enzymes (Morimatsu and Kowalczykowski, 2003). Whether these proposals hold true will certainly be seen in the near future. C. (1997). The translocating RecBCD enzyme stimulates recombination by directing RecA protein onto ssDNA in a chi-regulated manner. Cell, 90, 77–86. R. (1977). Tandem genetic duplications in phage and bacteria. Annu Rev Microbiol, 31, 473–505. C. (2002). Homologous-pairing activity of the Bacillus subtilis bacteriophage SPP1 replication protein G35P.
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