The eukarya and the archaea.

Replication of DNA is essential for the propagation of life. It is somewhat surprising then that, despite the vital nature of this process, cellular organ-isms show a great deal of variety in the mechanisms that they employ to ensure appropriate genome duplication. This diversity is manifested along classical evolutionary lines, with distinct combinations of replicon architec-ture and replication proteins being found in the three domains of life: the Bacteria, the Eukarya and the Archaea.

10p fptmusic 11-04-2013 72 3   Download

Across evolution, the signal recognition particle pathway targets extra-cytoplasmic proteins to membranous trans-location sites. Whereas the pathway has been extensively studied in Eukarya and Bacteria, little is known of this sys-tem in Archaea. In the following, membrane association of FtsY, the prokaryal signal recognition particle receptor, and SRP54, a central component of the signal recognition par-ticle, was addressed in the halophilic archaea Haloferax volcanii.

9p dell39 03-04-2013 36 3   Download