Patents by Inventor Richard George Antonius Bernardus Sewalt
Richard George Antonius Bernardus Sewalt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9228004Abstract: Described is a DNA molecule comprising an open reading frame sequence encoding a selectable marker polypeptide, wherein the DNA molecule in the coding strand comprises a translation start sequence for the selectable marker polypeptide having a GTG or TTG start codon, and wherein the ORF sequence that encodes the selectable marker protein has been mutated to replace at least half of its CpG dinucleotides as compared to the native ORF sequence that encodes the selectable marker protein. Further provided are such DNA molecules wherein the ORF sequence that encodes a selectable marker polypeptide is part of a multicistronic transcription unit that further comprises an open reading frame sequence encoding a polypeptide of interest. Also described are methods for obtaining host cells expressing a polypeptide of interest, wherein the host cells comprise the DNA molecules described herein.Type: GrantFiled: November 15, 2013Date of Patent: January 5, 2016Assignee: ChromaGenics B.V.Inventors: Arie Pieter Otte, Henricus J.M. van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Publication number: 20140186890Abstract: Provided is a DNA molecule comprising a multicistronic transcription unit coding for i) a selectable marker polypeptide functional in a eukaryotic host cell, and for ii) a polypeptide of interest, the polypeptide of interest having a translation initiation sequence separate from that of the selectable marker polypeptide, wherein the coding sequence for the polypeptide of interest is downstream from the coding sequence for the selectable marker in the multicistronic transcription unit, and the nucleic acid sequence coding for the selectable marker polypeptide comprises a mutation that decreases the translation efficiency of the selectable marker in a eukaryotic host cell. Also provided are methods for obtaining host cells expressing a polypeptide of interest, the host cells comprising the described DNA molecules. Further provided is the production of polypeptides of interest, comprising culturing host cells comprising the DNA molecules hereof.Type: ApplicationFiled: January 27, 2014Publication date: July 3, 2014Applicant: CHROMAGENICS B.V.Inventors: Arie Pieter OTTE, Henricus J.M. VAN BLOKLAND, Theodorus Hendrikus Jacobus KWAKS, Richard George Antonius Bernardus SEWALT
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Publication number: 20140106401Abstract: Described is a DNA molecule comprising an open reading frame sequence encoding a selectable marker polypeptide, wherein the DNA molecule in the coding strand comprises a translation start sequence for the selectable marker polypeptide having a GTG or TTG start codon, and wherein the ORF sequence that encodes the selectable marker protein has been mutated to replace at least half of its CpG dinucleotides as compared to the native ORF sequence that encodes the selectable marker protein. Further provided are such DNA molecules wherein the ORF sequence that encodes a selectable marker polypeptide is part of a multicistronic transcription unit that further comprises an open reading frame sequence encoding a polypeptide of interest. Also described are methods for obtaining host cells expressing a polypeptide of interest, wherein the host cells comprise the DNA molecules described herein.Type: ApplicationFiled: November 15, 2013Publication date: April 17, 2014Applicant: ChromaGenics B.V.Inventors: Arie Pieter Otte, Henricus J.M. van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Patent number: 8263393Abstract: Described are means and methods for providing a cell with a protein expression unit, the method comprising providing a nucleic acid sequence comprising the unit with a nucleic acid sequence encoding a binding site for a member of a chromatin modification system for rendering chromatin more accessible for transcription (opener), wherein the opener is present in the cell. Preferred openers comprise histone modification proteins, chromatin remodeling proteins and trithorax group proteins or equivalents. The cells thus generated and nucleic acid sequences encoding such openers are provided. Openers are preferred in the context of STAR and TRAP sequences.Type: GrantFiled: June 20, 2005Date of Patent: September 11, 2012Assignee: Chromagenics B.V.Inventors: Arie Pieter Otte, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Publication number: 20110300580Abstract: Described is a DNA molecule comprising an open reading frame sequence that encodes a selectable marker polypeptide, wherein the DNA molecule in the coding strand comprises a translation start sequence for the selectable marker polypeptide having a GTG start codon or a TTG start codon, and wherein the ORF sequence that encodes the selectable marker protein has been mutated to replace at least half of its CpG dinucleotides as compared to the native ORF sequence that encodes the selectable marker protein. Further provided are such DNA molecules wherein the ORF sequence that encodes a selectable marker polypeptide is part of a multicistronic transcription unit that further comprises an open reading frame sequence encoding a polypeptide of interest. Also described are methods for obtaining host cells expressing a polypeptide of interest, wherein the host cells comprise the DNA molecules described herein.Type: ApplicationFiled: July 18, 2011Publication date: December 8, 2011Inventors: Arie Pieter Otte, Henricus Johannes Maria Van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Patent number: 7968700Abstract: The invention provides recombinant DNA molecules comprising novel expression augmenting DNA fragments and an expression cassette, said expression cassette comprising a heterologous promoter linked to a nucleic acid of interest. The invention further provides uses of the novel expression augmenting DNA fragments. The invention further provides methods for obtaining novel expression augmenting DNA fragments.Type: GrantFiled: March 20, 2007Date of Patent: June 28, 2011Assignee: Chromagenics B.V.Inventors: Arie Pieter Otte, Henricus Johannes Maria Van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Patent number: 7960143Abstract: Described is the production of proteins in a host cell. Even more specifically, described are methods for improving expression of two or more proteins in a cells or host cell. The methods are suited for production of, for example, recombinant antibodies that can be used in pharmaceutical preparations or as diagnostic tools. In certain embodiments, provided are methods for obtaining a cell that expresses two or more proteins comprising providing the cell with two or more protein expression units encoding two or more proteins, characterized in that at least two of the protein expression units comprise at least one STAR sequence.Type: GrantFiled: October 26, 2007Date of Patent: June 14, 2011Assignee: Chromagenics B.V.Inventors: Arie Pieter Otte, Arthur Leo Kruckeberg, Richard George Antonius Bernardus Sewalt
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Patent number: 7901908Abstract: Described is the production of proteins in a host cell. More specifically, described are methods for improving expression of two or more proteins in a cell or host cell. The methods are suited for production of, for example, recombinant antibodies that can be used in pharmaceutical preparations or as diagnostic tools. In one embodiment, provided is a method for obtaining a cell that expresses two or more proteins comprising providing the cell with two or more protein expression units encoding two or more proteins, characterized in that at least two of the protein expression units comprise at least one STAR sequence.Type: GrantFiled: October 26, 2007Date of Patent: March 8, 2011Assignee: ChromaGenics B.V.Inventors: Arie Pieter Otte, Arthur Leo Kruckeberg, Richard George Antonius Bernardus Sewalt
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Patent number: 7825232Abstract: The invention provides a novel anti-repressor element, which is useful for improving expression of nucleic acid in host cells. Methods using the novel anti-repressor element for producing a protein of interest are also provided. The invention also provides new configurations of expression cassettes comprising anti-repressor elements.Type: GrantFiled: July 7, 2005Date of Patent: November 2, 2010Assignee: Chromagenics B.V.Inventors: Arie Pieter Otte, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt, Henricus Johannes Maria Van Blokland
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Publication number: 20100190207Abstract: The invention provides recombinant DNA molecules comprising novel expression augmenting DNA fragments and an expression cassette, said expression cassette comprising a heterologous promoter linked to a nucleic acid of interest. The invention further provides uses of the novel expression augmenting DNA fragments. The invention further provides methods for obtaining novel expression augmenting DNA fragments.Type: ApplicationFiled: March 20, 2007Publication date: July 29, 2010Inventors: Arie Pieter Otte, Henricus Johannes Maria Van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Publication number: 20090098601Abstract: The invention provides a DNA molecule comprising an open reading frame sequence that encodes a selectable marker polypeptide, wherein said DNA molecule in the coding strand comprises a translation start sequence for the selectable marker polypeptide having a GTG startcodon or a TTG startcodon, and wherein the open reading frame sequence that encodes the selectable marker protein has been mutated to replace at least half of its CpG dinucleotides as compared to the native open reading frame sequence that encodes the selectable marker protein.Type: ApplicationFiled: April 24, 2007Publication date: April 16, 2009Inventors: Arie Pieter Otte, Henricus Johannes Maria Van Blokland, Theodorus Hendrikus Jacobus Kwaks, Richard George Antonius Bernardus Sewalt
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Publication number: 20080227151Abstract: Described is the production of proteins in a host cell. Even more specifically, described are methods for improving expression of two or more proteins in a cells or host cell. The methods are suited for production of, for example, recombinant antibodies that can be used in pharmaceutical preparations or as diagnostic tools. In certain embodiments, provided are methods for obtaining a cell that expresses two or more proteins comprising providing the cell with two or more protein expression units encoding two or more proteins, characterized in that at least two of the protein expression units comprise at least one STAR sequence.Type: ApplicationFiled: October 26, 2007Publication date: September 18, 2008Applicant: Crucell Holland B.V.Inventors: Arie Pieter Otte, Arthur Leo Kruckeberg, Richard George Antonius Bernardus Sewalt
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Publication number: 20080227199Abstract: Described is the production of proteins in a host cell. More specifically, described are methods for improving expression of two or more proteins in a cell or host cell. The methods are suited for production of, for example, recombinant antibodies that can be used in pharmaceutical preparations or as diagnostic tools. In one embodiment, provided is a method for obtaining a cell that expresses two or more proteins comprising providing the cell with two or more protein expression units encoding two or more proteins, characterized in that at least two of the protein expression units comprise at least one STAR sequence.Type: ApplicationFiled: October 26, 2007Publication date: September 18, 2008Applicant: Crucell Holland B.V.Inventors: Arie Pieter Otte, Arthur Leo Kruckeberg, Richard George Antonius Bernardus Sewalt
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Patent number: 7364878Abstract: The invention relates to the field of biochemistry, molecular biology, pharmacology and diagnosis. More specifically the present invention relates to the production of proteins in a host cell. Even more specifically, the invention relates to a method for improving expression of two or more proteins in a (host) cell. The method is suited for production of, for example, recombinant antibodies that can be used in a pharmaceutical preparation or as a diagnostic tool. In one embodiment, the invention provides a method for obtaining a cell which expresses two or more proteins comprising providing the cell with two or more protein expression units encoding two or more proteins, characterized in that at least two of the protein expression units comprise at least one STAR sequence.Type: GrantFiled: December 14, 2004Date of Patent: April 29, 2008Assignee: Chromagenics B.V.Inventors: Arie Pieter Otte, Arthur Leo Kruckeberg, Richard George Antonius Bernardus Sewalt