Meine Merkliste
my.bionity.com  
Login  

992 Aktuelle Fachpublikationen von Proceedings of the National Academy of Sciences

rss
mit folgenden Suchkriterien:

Small RNA-based feedforward loop with AND-gate logic regulates extrachromosomal DNA transfer in Salmonella [Microbiology]

25.08.2015 | Kai Papenfort; Elena Espinosa; Josep Casadesús; Jörg Vogel, Proceedings of the National Academy of Sciences current issue, 2015

Horizontal gene transfer via plasmid conjugation is a major driving force in microbial evolution but constitutes a complex process that requires synchronization with the physiological state of the host bacteria. Although several host transcription factors are known to regulate plasmid-borne ...

mehr

Cheat invasion causes bacterial trait loss in lung infections [Evolution]

25.08.2015 | Rolf Kümmerli, Proceedings of the National Academy of Sciences current issue, 2015

Our traditional understanding of Darwin’s principle of natural selection is that organisms become better adapted to the environment they live in. Accordingly, new traits are selected for because they increase the organisms’ fitness. However, organisms cannot only gain but also lose traits. How ...

mehr

Endosymbiotic gene transfer from prokaryotic pangenomes: Inherited chimerism in eukaryotes [Colloquium Paper]

18.08.2015 | Chuan Ku; Shijulal Nelson-Sathi; Mayo Roettger; Sriram Garg; Einat Hazkani-Covo; William F. Martin, Proceedings of the National Academy of Sciences current issue, 2015

Endosymbiotic theory in eukaryotic-cell evolution rests upon a foundation of three cornerstone partners—the plastid (a cyanobacterium), the mitochondrion (a proteobacterium), and its host (an archaeon)—and carries a corollary that, over time, the majority of genes once present in the organelle ...

mehr

Heat dissipation guides activation in signaling proteins [Physics]

18.08.2015 | Jeffrey K. Weber; Diwakar Shukla; Vijay S. Pande, Proceedings of the National Academy of Sciences current issue, 2015

Life is fundamentally a nonequilibrium phenomenon. At the expense of dissipated energy, living things perform irreversible processes that allow them to propagate and reproduce. Within cells, evolution has designed nanoscale machines to do meaningful work with energy harnessed from a continuous ...

mehr

The massive mitochondrial genome of the angiosperm Silene noctiflora is evolving by gain or loss of entire chromosomes [Colloquium Paper]

18.08.2015 | Zhiqiang Wu; Jocelyn M. Cuthbert; Douglas R. Taylor; Daniel B. Sloan, Proceedings of the National Academy of Sciences current issue, 2015

Across eukaryotes, mitochondria exhibit staggering diversity in genomic architecture, including the repeated evolution of multichromosomal structures. Unlike in the nucleus, where mitosis and meiosis ensure faithful transmission of chromosomes, the mechanisms of inheritance in fragmented ...

mehr

Toward major evolutionary transitions theory 2.0 [Colloquium Paper]

18.08.2015 | Eörs Szathmáry, Proceedings of the National Academy of Sciences current issue, 2015

The impressive body of work on the major evolutionary transitions in the last 20 y calls for a reconstruction of the theory although a 2D account (evolution of informational systems and transitions in individuality) remains. Significant advances include the concept of fraternal and egalitarian ...

mehr

Eukaryogenesis, how special really? [Colloquium Paper]

18.08.2015 | Austin Booth; W. Ford Doolittle, Proceedings of the National Academy of Sciences current issue, 2015

Eukaryogenesis is widely viewed as an improbable evolutionary transition uniquely affecting the evolution of life on this planet. However, scientific and popular rhetoric extolling this event as a singularity lacks rigorous evidential and statistical support. Here, we question several of the ...

mehr

Genomic perspectives on the birth and spread of plastids [Colloquium Paper]

18.08.2015 | John M. Archibald, Proceedings of the National Academy of Sciences current issue, 2015

The endosymbiotic origin of plastids from cyanobacteria was a landmark event in the history of eukaryotic life. Subsequent to the evolution of primary plastids, photosynthesis spread from red and green algae to unrelated eukaryotes by secondary and tertiary endosymbiosis. Although the movement of ...

mehr

Metabolic connectivity as a driver of host and endosymbiont integration [Colloquium Paper]

18.08.2015 | Slim Karkar; Fabio Facchinelli; Dana C. Price; Andreas P. M. Weber; Debashish Bhattacharya, Proceedings of the National Academy of Sciences current issue, 2015

The origin of oxygenic photosynthesis in the Archaeplastida common ancestor was foundational for the evolution of multicellular life. It is very likely that the primary endosymbiosis that explains plastid origin relied initially on the establishment of a metabolic connection between the host cell ...

mehr

Signatures of host/symbiont genome coevolution in insect nutritional endosymbioses [Colloquium Paper]

18.08.2015 | Alex C. C. Wilson; Rebecca P. Duncan, Proceedings of the National Academy of Sciences current issue, 2015

The role of symbiosis in bacterial symbiont genome evolution is well understood, yet the ways that symbiosis shapes host genomes or more particularly, host/symbiont genome coevolution in the holobiont is only now being revealed. Here, we identify three coevolutionary signatures that characterize ...

mehr

Seite 1 von 100
Suche per e-Mail abonnieren

Sie erhalten passend zu Ihrer Suche die neusten Suchergebnisse per E-Mail. Dieser Service ist für Sie kostenlos und kann jederzeit abbestellt werden.

Ihr Bowser ist nicht aktuell. Microsoft Internet Explorer 6.0 unterstützt einige Funktionen auf Chemie.DE nicht.