Sökning: "protein synthesis"

Visar resultat 6 - 10 av 939 avhandlingar innehållade orden protein synthesis.

1. 6. Rate and Accuracy of Bacterial Protein Synthesis

   Författare :Magnus Johansson; Måns Ehrenberg; Jon Lorsch; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; protein synthesis; ribosome; peptidyl transfer; rate-accuracy trade-off; kinetics; Biology with specialization in Molecular Biotechnology; Biologi med inriktning mot molekylär bioteknik;

   Sammanfattning : High levels of accuracy in transcription, aminoacylation of tRNA, and mRNA translation are essential for all life forms. However, high accuracy also necessarily means large energy dissipation and slow kinetics. Therefore, in vivo there is a fine tuned balance between rate and accuracy of key chemical reactions. LÄS MER

3. 7. Vitamin K-dependent protein S - studies of synthesis, structure and function

   Författare :Sofia Somajo; Malmö Klinisk kemi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; C4b-binding protein; coagulation; microparticles; protein C; protein S; structure; tissue factor pathway inhibitor;

   Sammanfattning : This thesis is based on four projects with the overall aim to investigate vitamin K-dependent protein S functions in relation to its structure. The anticoagulant functions of protein S can be divided in three: 1) cofactor for activated protein C (APC), 2) cofactor for tissue factor pathway inhibitor (TFPI) and 3) APC and TFPI-independent anticoagulant functions. LÄS MER

4. 8. Ribosomal Stalk Protein L12 : Structure, Function and Application

   Författare :Chandra Sekhar Mandava; Suparna Sanyal; Knud Nierhaus; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ribosome; protein synthesis; L12 dimer; initiation; elongation; G factors; and His-tag; Molecular biology; Molekylärbiologi; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi;

   Sammanfattning : Ribosomal stalk proteins are known to play important role in protein synthesis. The ‘stalk’, an extended structure on the large subunit of the ribosome is composed mainly of two to three dimers of L12 and one L10 protein, which forms the base of the stalk. In E. LÄS MER

5. 9. Accuracy of mRNA Translation in Bacterial Protein Synthesis

   Författare :Jingji Zhang; Måns Ehrenberg; Olke C. Uhlenbeck; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; protein synthesis; genetic code; misreading; error hot spots; kinetics; aminoglycoside; Biokemi; Biochemistry;

   Sammanfattning : Reading of messenger RNA (mRNA) by aminoacyl-tRNAs (aa-tRNAs) on the ribosomes in the bacterial cell occurs with high accuracy. It follows from the physical chemistry of enzymatic reactions that there must be a trade-off between rate and accuracy of initial tRNA selection in protein synthesis: when the current accuracy, the A-value, approaches its maximal possible value, the d-value, the kinetic efficiency of the reaction approaches zero. LÄS MER

7. 10. Versatile Implementations of an Improved Cell-Free System for Protein Biosynthesis : Functional and structural studies of ribosomal protein L11 and class II release factor RF3. Novel biotechnological approach for continuous protein biosynthesis

   Författare :Lamine Bouakaz; Måns Ehrenberg; Richard Buckingham; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; Protein synthesis; translation termination; ribosome; release factor; cell-free system; missense error; gel filtration; affinity chromatography; Molekylärbiologi; Molecular biology; Molekylärbiologi;

   Sammanfattning : Advances in genetics, proteomics and chromatography techniques have enabled the successfully generation of a cell-free bacterial translation system composed of highly pure and active components. This system provided an ideal platform for better elucidating the mechanism of each individual step of the prokaryotic protein biosynthesis and the function of the translation factors involved in the process. LÄS MER