Patents by Inventor Karl F. Johnson

Karl F. Johnson 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).

  • Publication number: 20200024628
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: May 17, 2019
    Publication date: January 23, 2020
    Inventors: Karl F. Johnson, Shawn DeFrees, Stephen Withers, Mark Vaughan
  • Patent number: 10294504
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: May 21, 2019
    Assignees: La Jolla Pharmaceutical Company, The University of British Columbia
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Publication number: 20160032342
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: June 29, 2015
    Publication date: February 4, 2016
    Applicants: Seneb Biosciences, Inc., The University of British Columbia
    Inventors: Karl F. JOHNSON, Shawn DEFREES, Stephen WITHERS, Mark VAUGHAN
  • Patent number: 9068208
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: June 30, 2015
    Assignee: Seneb Biosciences, Inc.
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Patent number: 8822191
    Abstract: The present invention provides methods of refolding mammalian glycosyltransferases that have been produced in bacterial cells, and methods to use such refolded glycosyltransferases, including glycosyltransferase mutants that have enhanced ability to be refolded. The invention also provides methods of refolding more than one glycosyltransferase in a single vessel, methods to use such refolded glycosyltransferases, and reaction mixtures comprising the refolded glycosyltransferases.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: September 2, 2014
    Assignee: Novo Nordisk A/S
    Inventors: Sami Saribas, David Hakes, Scott Willett, Karl F. Johnson, Daniel James Bezila, Shawn DeFrees
  • Publication number: 20140147891
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: July 24, 2013
    Publication date: May 29, 2014
    Applicants: The University of British Columbia University- Industry Liaison Office, Seneb BioSciences, Inc.
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Patent number: 8043833
    Abstract: The present invention provides enhanced methods of producing soluble, active fibroblast growth factor-20 (FGF-20), FGF-21, neurotrophin-3 (NT-3), growth hormone (GH), granulocyte colony stimulating factor (G-CSF), or glucocerebrosidase proteins in microorganisms that have an oxidizing environment.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: October 25, 2011
    Assignee: Novo Nordisk A/S
    Inventors: Marc F. Schwartz, Bingyuan Wu, Aliakbar Mobasseri, Shawn A. DeFrees, Tarik Soliman, Karl F. Johnson
  • Publication number: 20090298121
    Abstract: The present invention provides enhanced methods of producing soluble, active fibroblast growth factor-20 (FGF-20), FGF-21, neurotrophin-3 (NT-3), growth hormone (GH), granulocyte colony stimulating factor (G-CSF), or glucocerebrosidase proteins in microorganisms that have an oxidizing environment.
    Type: Application
    Filed: September 6, 2006
    Publication date: December 3, 2009
    Inventors: Marc F. Schwartz, Bingyuan Wu, Aliakbar Mobasseri, Shawn A. DeFrees, Tarik Soliman, Karl F. Johnson
  • Publication number: 20090170155
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: June 1, 2005
    Publication date: July 2, 2009
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA UNIVERSITY-INDU
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Patent number: 7524655
    Abstract: This invention provides nucleic acid and amino acid sequences of fucosyltransferases from Helicobactor pylori. The invention also provides methods to use the fucosyltransferases to synthesize oligosaccharides, glycoproteins, and glycolipids.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: April 28, 2009
    Assignees: Neose Technologies, Inc., Governors of the University of Alberta
    Inventors: Karl F. Johnson, Daniel James Bezila, Diane E. Taylor, Joanne Simala-Grant, David Rasko
  • Publication number: 20080206810
    Abstract: The present invention features compositions and methods related to truncated mutants of ST6GalNAcI. In particular, the invention features truncated human, mouse, and chicken ST6GalNAcI polypeptides. The invention also features nucleic acids encoding such truncated polypeptides, as well as vectors, host cells, expression systems, and methods of expressing and using such polypeptides.
    Type: Application
    Filed: June 3, 2005
    Publication date: August 28, 2008
    Applicant: Neose Technologies, Inc.
    Inventors: Karl F. Johnson, David James Hakes, Ge Wei, Li Liu, Sami Saribas, Eric R. Sjoberg, Henrik Clausen, Eric Paul Bennett, Aliakbar Mobasseri
  • Patent number: 7368108
    Abstract: This invention provides methods for modifying glycosylation patterns of glycopeptides, including recombinantly produced glycopeptides. Also provided are glycopeptide compositions in which the glycopeptides have a homogeneous glycosylation pattern.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: May 6, 2008
    Assignee: Neose Technologies, Inc.
    Inventors: Shawn DeFrees, Karl F. Johnson
  • Publication number: 20080058245
    Abstract: The present invention relates to methods of providing a protein product to a customer. In particular, the invention relates methods of using protein expression vectors to produce proteins to be provided to a client. The invention also provides vectors for the cloning and expression of proteins, including reagent proteins and therapeutic proteins.
    Type: Application
    Filed: January 6, 2005
    Publication date: March 6, 2008
    Inventors: Karl F. Johnson, Dan Bezila, Winnie Ngo, David Hakes
  • Patent number: 7326770
    Abstract: This invention provides nucleic acid and amino acid sequences of fucosyltransferases from Helicobactor pylori. The invention also provides methods to use the fucosyltransferases to synthesize oligosaccharides, glycoproteins, and glycolipids.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: February 5, 2008
    Assignees: Neose Technologies, Inc., Governors of the University of Alberta
    Inventors: Joanne Simala-Grant, Diane Taylor, Karl F. Johnson, Daniel James Bezila
  • Publication number: 20030207406
    Abstract: The present invention relates to a method of transferring at least two saccharide units with a polyglycosyltransferase, a polyglycosyltransferase and a gene encoding such a polyglycosyltransferase.
    Type: Application
    Filed: March 7, 2002
    Publication date: November 6, 2003
    Applicant: Neose Technologies, Inc.
    Inventors: Karl F. Johnson, Stephen Roth, Stephanie L. Buczala
  • Patent number: 6379933
    Abstract: The present invention relates to a method of transferring at least two saccharide units with a polyglycosyltransferase, a polyglycosyltransferase and a gene encoding such a polyglycosyltransferase.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: April 30, 2002
    Assignee: Neose Technologies, Inc.
    Inventors: Karl F. Johnson, Stephen Roth, Stephanie L. Buczala
  • Patent number: 6127153
    Abstract: The present invention relates to a method of transferring at least two saccharide units with a polyglycosyltransferase, a polyglycosyltransferase and a gene encoding such a polyglycosyltransferase.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 3, 2000
    Assignee: Neose Technologies, Inc.
    Inventors: Karl F. Johnson, Stephen Roth, Stephanie L. Buczala
  • Patent number: 6001819
    Abstract: The present invention is directed to compositions for the treatment of respiratory infections caused by a bacteria selected from the group consisting of S. pneumoniae, H. influenzae, H. parainfluenza, Burkholderia (Pseudomonas) cepacia, and a mixture thereof, comprising a binding inhibiting effective amount of the compound of Formula I, ##STR1## where R.sub.1 is H, (.beta.-1)GalNAc-, SO.sub.3 B (where B is H or a cation) or a sialic acid of Formula II; ##STR2## where R.sub.6, R.sub.7, R.sub.8, and R.sub.10 are each independently H, C.sub.1-6 acyl, lactyl, C.sub.1-6 alkyl, sulfate, phosphate, anhydro, a sialic acid of Formula II, (.alpha.-1)Fuc, (.beta.-1)Glc or (.beta.-1)Gal;R.sub.9 is NH--C.sub.1-6 acyl, glycolylamido, amino or hydroxyl; andA is H or a cation;R.sub.2 is H or (.alpha.-1)Fuc-;R.sub.3 and R.sub.4 are each independently OH or NHAc;R.sub.5 is H, SO.sub.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: December 14, 1999
    Assignee: Neose Technologies, Inc.
    Inventors: Paul M. Simon, David Zopf, Roger A. Barthelson, Karl F. Johnson
  • Patent number: 5736533
    Abstract: The present invention is directed to a method of treating respiratory infections caused by a bacteria selected from the group consisting of S. pneumoniae, H. influenzae, H. parainfluenzae, Burkholderia (Pseudomonas) cepacia and a mixture thereof, by administering a binding inhibiting effective amount of the compound of Formula I, ##STR1## where R.sub.1 is H, (.beta.-1)GalNAc--, SO.sub.3 B (where B is H or a cation) or a sialic acid of Formula II; ##STR2## where R.sub.6, R.sub.7, R.sub.8, and R.sub.10 are each independently H, C.sub.1-6 acyl, lactyl, C.sub.1-6 alkyl, sulfate, phosphate, anhydro, a sialic acid of Formula II, (.alpha.-1)Fuc, (.beta.-1)Glc or (.beta.-1)Gal;R.sub.9 is NH--C.sub.1-6 acyl, glycolylamido, amino or hydroxyl; andA is H or a cation;R.sub.2 is H or (.alpha.-1)Fuc--;R.sub.3 and R.sub.4 are each independently OH or NHAc;R.sub.5 is H, SO.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 7, 1998
    Assignee: Neose Technologies, Inc.
    Inventors: Paul M. Simon, David Zopf, Roger A. Barthelson, Karl F. Johnson
  • Patent number: H1633
    Abstract: A deodorized polysulfide composition, comprising a major amount of polysulfide material and a minor but effective amount of a deodorizing composition comprising an oil-soluble tertiary alkanolamine of the formula: ##STR1## wherein R.sub.2, R.sub.3 and R.sub.4 are independently alkyl groups of about 1 to 6 carbon atoms; and a monohydric alkyl alcohol containing up to about 12 carbon atoms is disclosed.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: February 4, 1997
    Assignee: The Lubrizol Corporation
    Inventors: Gregory L. Hiebert, Karl F. Johnson