Search for dissertations about: "PII proteins"

Found 5 swedish dissertations containing the words PII proteins.

  2. 1. PII proteins as global regulators of bacterial nitrogen metabolism

    Author : Pedro Filipe Teixeira; Stefan Nordlund; Ray Dixon; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Rhodospirillum rubrum; nitrogen metabolism; signal transduction; PII proteins; Biochemistry; Biokemi; Biochemistry; biokemi;

    Abstract : Nitrogen is an essential element to sustain life, being a component of most biological macromolecules. In spite of the abundance of gaseous N2, the availability of nitrogen compounds that can be readily used by most microorganisms is scarce and its production energetically demanding. READ MORE

  4. 2. Regulation of Glutamine Synthetase in the Diazotroph Rhodospirillum rubrum

    Author : Anders Jonsson; Stefan Nordlund; Karl Forchhammer; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; glutamine synthetase; Rhodospirillum rubrum; GlnE; PII; Biochemistry; Biokemi; biokemi; Biochemistry;

    Abstract : The bacterial cell needs ammonia for synthesis of glutamine from glutamate. Only one enzyme is able to catalyze this reaction, namely glutamine synthetase (GS). GS can be regulated both transcriptionally and post-translationally and it is present in all kingdoms of life. READ MORE

  5. 3. Metabolic regulation of nitrogen fixation in Rhodospirillum rubrum

    Author : He Wang; Stefan Nordlund; Patrick Hallenbeck; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Rhodospirillum rubrum; nitrogen fixation; switch-off; PII; AmtB1; DRAG; Biochemistry; Biokemi; Biochemistry; biokemi;

    Abstract : Nitrogen, along with carbon, hydrogen and oxygen, is amongst the most abundant elements in all living cells. The capability to convert atmospheric dinitrogen to biologically usable nitrogen compounds is only found in some prokaryotes. READ MORE

  6. 4. Extracellular serine proteases as virulence factors in nematophagous fungi: Molecular characterization and functional analysis of the PII protease in Arthrobotrys oligospora

    Author : Johan Åhman; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Aspergillus niger.; Heterologous expression; Over-expression; Gene-disruption; Transformation system; Serine protease; Biological control; Arthrobotrys oligospora; Fungi; Nematophagous; Biologi;

    Abstract : Nematophagous fungi are parasites of nematodes, thus they have been considered and tested for biological control of parasitic nematodes, but so far with limited success. Due to the fact that the nematode cuticle is composed of proteins it is likely that fungal extracellular proteases are involved in the infection of nematodes. READ MORE

  7. 5. Regulation of nitrogen fixation in Rhodospirillum rubrum : Through proteomics and beyond

    Author : Tiago Selao; Agneta Norén; Daniel Arp; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Rhodospirillum rubrum; nitrogen fixation; redox balance; switch-off; DRAT; Biochemistry; Biokemi; Biochemistry; biokemi;

    Abstract : Adaptability is one of the reasons for the success of bacteria, allowing them to survive in conditions where no other organisms would be able to thrive. Nitrogen deficiency, for example, can be a limiting factor for the growth of micro-organisms, as this element is an essential part of almost all types of biomolecules. READ MORE