Philippi A.,University of Regensburg |
Steinbauer R.,University of Regensburg |
Reiter A.,University of Regensburg |
Fath S.,University of Regensburg |
And 6 more authors.
Nucleic Acids Research | Year: 2010
Ribosome biogenesis is tightly linked to cellular growth. A crucial step in the regulation of ribosomal RNA (rRNA) gene transcription is the formation of the complex between RNA polymerase I (Pol I) and the Pol I-dependent transcription factor Rrn3p. We found that TOR inactivation leads to proteasome-dependent degradation of Rrn3p and a strong reduction in initiation competent Pol I-Rrn3p complexes affecting yeast rRNA gene transcription. Using a mutant expressing non-degradable Rrn3p or a strain in which defined endogenous Rrn3p levels can be adjusted by the Tet-off system, we can demonstrate that Rrn3p levels influence the number of Pol I-Rrn3p complexes and consequently rRNA gene transcription. However, our analysis reveals that the dramatic reduction of rRNA synthesis in the immediate cellular response to impaired TOR signalling cannot be explained by the simple down-regulation of Rrn3p and Pol I-Rrn3p levels. © The Author(s) 2010. Published by Oxford University Press.
Geneart Ag and Life Technologies | Date: 2013-04-04
The invention generally relates to compositions and methods for designing and producing functional DNA binding effector molecules and associated customized services, tool kits and functional assays. In some aspects, the invention provides methods and tools for efficient assembly of customized TAL effector molecules. Furthermore, the invention relates to uses of TAL effector molecules and functional evaluation of such TAL by, for example, customized assays.
Geneart Ag | Date: 2012-06-15
The invention relates to a method for optimizing a nucleotide sequence for expression of a protein on the basis of the amino acid sequence of the protein, in which for a particular region there is specification of a test sequence with m optimization positions on which the codon occupation is varied, a quality function being used to ascertain the optimal codon occupation on these optimization positions, and one or more codons of this optimal occupation being specified as codons of the optimized nucleotide sequence. These steps are iterated, with the codons of the optimized nucleotide sequence which are specified in the preceding steps remaining unchanged in subsequent iteration steps. The invention additionally relates to a device for carrying out this method.
Geneart Ag | Date: 2012-09-14
The present invention relates to synthetic gag and gagpol genes optimized for high level expression via codon optimization and the uses thereof for the efficient generation of vector particles. The invention further relates to the generation of packaging cells and vaccines based on the synthetic gag and gagpol genes.
Geneart Ag | Date: 2011-12-20
The present invention relates to reading-frame-correct fragment libraries, methods for their production, and the use of the fragment libraries for selection of functional polypeptide variants with improved properties.