Sökning: "compensatory evolution"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden compensatory evolution.

  1. 1. Biased Evolution : Causes and Consequences

    Författare :Gerrit Brandis; Diarmaid Hughes; Erik Böttger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolution; Codon usage bias; Post-transcriptional regulation; Recombination; Inversion; EF-Tu; Frameshift suppression; Antibiotic resistance; Rifampicin; Ciprofloxacin; Compensatory evolution; Drug efflux; RNA polymerase; DNA gyrase; Mikrobiologi; Microbiology;

    Sammanfattning : In evolution alternative genetic trajectories can potentially lead to similar phenotypic outcomes. However, certain trajectories are preferred over others. These preferences bias the genomes of living organisms and the underlying processes can be observed in ongoing evolution. LÄS MER

  2. 2. Evolution and host-specific adaptations of Legionella pneumophila

    Författare :Anaísa B. Moreno; Lionel Guy; Dan I. Andersson; Fredrik Söderbom; Alexander W. Ensminger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Evolution; Legionella pneumophila; host-adaptation; experimental evolution; Acanthamoeba castellanii; transfection; Mikrobiologi; Microbiology;

    Sammanfattning : How bacteria evolve pathogenic traits is shaped by their communities and environments. Legionella pneumophila is ubiquitous in aquatic habitats, where it persists by replicating within a broad range of protozoan hosts. Using the same mechanisms, L. LÄS MER

  3. 3. Surviving the ratchet : Modelling deleterious mutations in asexual populations

    Författare :Jonas Söderberg; Otto Berg; Laurence Loewe; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Theoretical biology; Population genetics; Stochastic modelling; Genome evolution; Muller s Ratchet; Genetics; Genetik; Organism biology; Organismbiologi; Biology; Biologi; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Sammanfattning : One of the most unforgiving processes in nature is that of Muller's ratchet, a seemingly irreversible accumulation of deleterious mutations that all organisms have to deal with or face extinction. The most obvious way to avoid fitness collapse is recombination, though asexual populations usually do not have the luxury of recombining freely. LÄS MER

  4. 4. Mechanisms of Antibiotic Resistance Evolution

    Författare :Michael Knopp; Dan Andersson; Anca Segall; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Antibiotic resistance evolution; Escherichia coli; Salmonella; porins; fitness; epistasis; strain-specificity; sub-MIC; de novo gene evolution;

    Sammanfattning : The continuing emergence and spread of antibiotic resistant bacteria are a threat to various applications in modern medicine and impose a strong economic burden on health systems. The development of new antibiotics is slow and cannot counterbalance the dissemination of resistant bacteria. LÄS MER

  5. 5. Mechanisms of Adaptation to Deformylase Inhibitors

    Författare :Anna Zorzet; Dan Andersson; Paul Rainey; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; antibiotic resistance; compensatory evolution; compensatory mutations; protein synthesis; initiation factor 2; initiator tRNA; formylation; peptide deformylase inhibitors; Bacteriology; Bakteriologi; Mikrobiologi; Microbiology; Biokemi; Biochemistry; Geography; Geografi;

    Sammanfattning : Antibiotic resistance is a growing problem on a global scale. Increasing numbers of bacteria resistant toward one or multiple antibiotics could return us to the high mortality rates for infectious diseases of the pre-antibiotic era. LÄS MER