Search for dissertations about: "SmpB"

Found 3 swedish dissertations containing the word SmpB.

  2. 1. Finding the unknowns in trans-translation

    Author : Natalia Ivanova; Måns Ehrenberg; Nenad Ban; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; trans-translation; tmRNA; SmpB; kinetics; footprinting; Molekylärbiologi; Molecular biology; Molekylärbiologi;

    Abstract : Ribosomes stalled on problematic mRNAs can be rescued by a mechanism called trans-translation. This mechanism employs a dual transfer-messenger RNA molecule (tmRNA) together with a helper protein (SmpB). In this work we have used an in vitro translation system with pure components to further clarify the roles of tmRNA and SmpB in trans-translation. READ MORE

  4. 2. Lead(II) as a Tool for Probing RNA Structure in vivo

    Author : Magnus Lindell; Gerhart Wagner; Roland Hartmann; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; lead II cleavage; RNA structure; in vivo probing; Molekylärbiologi; Molecular biology; Molekylärbiologi;

    Abstract : Chemical modification and limited enzymatic hydrolysis are powerful methods to obtain detailed information on the structure and dynamics of RNAs in solution. In the work presented here I have taken advantage of the properties of the divalent metal ion lead(II) to establish it as a new probe for investigating the structure of RNA in vivo. READ MORE

  5. 3. Single-particle cryo-electron microscopy of macromolecular assemblies

    Author : Kimberley Cheng; Hans Hebert; Roland Beckmann; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bioengineering; Bioteknik;

    Abstract : In this thesis, single-particle cryo-electron microscopy (cryo-EM) was used to study the structure of three macromolecular assemblies: the two hemocyanin isoforms from Rapana thomasiana, the Pyrococcus furiosus chaperonin, and the ribosome from Escherichia coli. Hemocyanins are large respiratory proteins in arthropods and molluscs. READ MORE