Sökning: "transmembrane helices"

Visar resultat 11 - 15 av 32 avhandlingar innehållade orden transmembrane helices.

  1. 11. Membrane-bound proteins : Characterization, evolution, and functional analysis

    Författare :Misty M. Attwood; Helgi B. Schiöth; Arne Elofsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Transmembrane protein; alpha-helical membrane protein; evolution membrane proteins; 3TM; 4TM; 5TM; trispanin; Bioinformatics; Bioinformatik;

    Sammanfattning : Alpha-helical transmembrane proteins are important components of many essential cell processes including signal transduction, transport of molecules across membranes, protein and membrane trafficking, and structural and adhesion activities, amongst others. Their involvement in critical networks makes them the focus of interest in investigating disease pathways, as candidate drug targets, and in evolutionary analyses to identify homologous protein families and possible functional activities. LÄS MER

  2. 12. Prokaryotic Arsenic Resistance - Studies in Bacillus subtilis

    Författare :Emil Aaltonen; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ArsB; Bacillus subtilis; arsenic resistance; arsenate reduction; arsenite transport; gene regulation; arsenate; ArsR; arsenite; transmembrane topology; Acr3; ArsK;

    Sammanfattning : Arsenic is a toxic metalloid which is found all over the globe. Due to its toxicity and wide abundance, all living organisms have evolved intrinsic arsenic resistance systems. In this study, three proteins that provide arsenic resistance in the Gram-positive bacterium Bacillus subtilis have been investigated. LÄS MER

  3. 13. Integration and topology of membrane proteins

    Författare :Carolina Boekel; Gunnar von Heijne; IngMarie Nilsson; Stephen High; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; insertion; Sec61; translocation; Biochemistry; Biokemi; biokemi; Biochemistry;

    Sammanfattning : Membrane proteins comprise around 20-30% of most proteomes. They play important roles in most biochemical pathways. All receptors and ion channels are membrane proteins, which make them attractive targets for drug design. Membrane proteins insert and fold co-translationally into the endoplasmic reticular membrane of eukaryotic cells. LÄS MER

  4. 14. Sequence-based predictions of membrane-protein topology, homology and insertion

    Författare :Andreas Bernsel; Gunnar von Heijne; Volkhard Helms; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; membrane protein; topology prediction; hidden markov model; homology detection; Sec translocon; Bioinformatics; Bioinformatik; Biochemistry; biokemi;

    Sammanfattning : Membrane proteins comprise around 20-30% of a typical proteome and play crucial roles in a wide variety of biochemical pathways. Apart from their general biological significance, membrane proteins are of particular interest to the pharmaceutical industry, being targets for more than half of all available drugs. LÄS MER

  5. 15. Generation and exploitation of proton motive force: Biochemical and structural analysis of three bacterial integral membrane proteins

    Författare :Pontus Emanuel Gourdon; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; X-ray crystallography; AcrB; structure; proteorhodopsin; multi-drug resistance; transhydrogenase; membrane proteins; proton motive force;

    Sammanfattning : Proton motive force, a necessity for all living cells, is generated and exploited by asignificant number of membrane-bound enzymes and transporters. The focus of thisthesis was to understand the physiological relevance, structure and mechanism of threesuch bacterial enzymes: proteorhodopsin; transhydrogenase; and AcrB. LÄS MER