摘要:
The invention relates to a fed-batch fermentation process which uses special E. coli host/vector systems for the purpose of efficiently forming recombinant proteins, in particular recombinant antibody molecules, preferably antibody fragments such as miniantibodies. Under the given conditions, the E. coli cells are able to grow at a maximum specific growth rate up to very high cell densities. After the recombinant product formation has been switched on, it is only the formed product which restricts growth; there is no growth restriction due to substrates or metabolic by-products. High space-time yields of recombinant proteins can be achieved in this manner.
摘要:
The present invention relates to a filamentous phage display method wherein the polypeptides of interest displayed on the phage particle are cotranslationally translocated across the cytoplasmic membrane of Gram-negative bacteria based on the signal recognition particle pathway. This method is particularly suitable for polypeptides, which are known to be difficult to display on phages, and for proteins of cDNA libraries and other combinatorial libraries, in particular when derived from very fast folding, stable protein scaffolds. The invention further relates to phage or phagemid vectors useful in the method comprising a gene construct coding for a fusion polypeptide comprising the polypeptide to be displayed on the phage particle and an N-terminal signal sequence promoting cotranslational translocation.
摘要:
The invention relates to collections of target-specific designed binding proteins based on armadillo repeat proteins, and to a method of generating them. Designed armadillo repeat proteins are based on consensus sequences of single armadillo repeat units. These repeat proteins can be used as scaffolds for peptide recognition. Such a scaffold provides a binding mode that is in principle the same for every small recognizable unit, e.g. an amino acid or dipeptide, allowing a precise and modular recognition of a peptide in extended conformation. The method allows to generate a series of modules recognizing these simple units, and to combine such building blocks to create a binding site for any desired peptide target without performing additional selections.
摘要:
The present invention relates to synthetic DNA sequences which encode one or more collections of homologous proteins/(poly)peptides, and methods for generating and applying libraries of these DNA sequences. In particular, the invention relates to the preparation of a library of human-derived antibody genes by the use of synthetic consensus sequences which cover the structural repertoire of antibodies encoded in the human genome. Furthermore, the invention relates to the use of a single consensus antibody gene as a universal framework for highly diverse antibody libraries.
摘要:
The present invention relates to a method for obtaining nucleic acid sequences encoding (poly)peptides which increase the expression yields of periplasmic proteins in functional form upon co-expression of said (poly)peptides and said periplasmic proteins. The invention also provides a method for the identification of said (poly)peptides. Furthermore, the present invention relates to a method for increasing the expression yields of periplasmic proteins in functional form by co-expressing (poly)peptides, for example Skp, FkpA, or a homolog of Skp or FkpA, in bacteria.
摘要:
The present invention relates to methods for identifying nucleic acid molecules encoding (poly)peptides that interact with target molecules. The method of the present invention is particularly characterized by an in vitro translation step under conditions that allow formation of polysomes in the presence of antisense oligonucleotides complementary to the tag-coding sequence of ssrA-RNA. The present invention further relates to kits that are useful for carrying out the method of the invention.
摘要:
The invention relates to collections of target-specific designed binding proteins based on armadillo repeat proteins, and to a method of generating them. Designed armadillo repeat proteins are based on consensus sequences of single armadillo repeat units. These repeat proteins can be used as scaffolds for peptide recognition. Such a scaffold provides a binding mode that is in principle the same for every small recognizable unit, e.g. an amino acid or dipeptide, allowing a precise and modular recognition of a peptide in extended conformation. The method allows to generate a series of modules recognizing these simple units, and to combine such building blocks to create a binding site for any desired peptide target without performing additional selections.
摘要:
The present invention relates to a method for stabilizing chimeric immunoglobulins or immunoglobulin fragments. Furthermore, the invention also provides a stabilized anti-EGP-2 scFv fragment.
摘要:
The present invention relates to collections of repeat proteins comprising repeat modules which are derived from one or more repeat units of a family of naturally occurring repeat proteins, to collections of nucleic acid molecules encoding said repeat proteins, to methods for the constructions and application of such collections and to individual members of such collections.
摘要:
The present invention relates to the modification of immunoglobulin superfamily (IgSF) domains, IgSF fragments and fusion proteins thereof, especially to the modification of antibody derivatives, so as to improve their solubility, and hence the yield, and ease of handling. The inventors have found that this can be achieved by making the region which comprised the interface with domains adjoined to said IgSF domain in a larger fragment or a full IgSF protein, and which becomes exposed in the IgSF domain, more hydrophilic by modification. The present invention describes DNA sequences encoding modified IgSF domains or fragments and fusion proteins thereof, vectors and hosts containing these DNA sequences, IgSF domains or fragments or fusion proteins obtainable by expressing said DNA sequences in suitable expression systems, and a method for modifying IgSF domains, so as to improve their solubility, expressibility and ease of handling.