Patents by Inventor Margaret Dah-Tsyr Chang

Margaret Dah-Tsyr Chang 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: 20110129853
    Abstract: A polysaccharide-protein binding model of SBD, and a fibril-forming 14-residue peptide consisting of X1NNNX2X3NYQX4X5X6X7X8, wherein the X1 and X8 mean a pair of opposite charged amino acid residues, and the X2, X3, X4, X5, X6, or X7 means an amino acid residue is described. A mixture for diminising a polysaccharide, comprising at least two starch binding domains (SBDs) and a polysaccharide in a helix form is also presented. A method of providing an oligosaccharide, and a method of producing an amyloid-like fibril and use thereof are further described.
    Type: Application
    Filed: January 19, 2011
    Publication date: June 2, 2011
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Margaret Dah-Tsyr Chang, Yuh-Ju Sun, Ping-Chiang Lyu, Shu-Chuan Lin, Wei-I Chou
  • Patent number: 7919580
    Abstract: A polysaccharide-protein binding model of SBD, and a fibril-forming 14-residue peptide consisting of X1NNNX2X3NYQX4X5X6X7X8, wherein the X1 and X8 mean a pair of opposite charged amino acid residues, and the X2, X3, X4, X5, X6, or X7 means an amino acid residue is described. A mixture for diminising a polysaccharide, comprising at least two starch binding domains (SBDs) and a polysaccharide in a helix form is also presented. A method of providing an oligosaccharide, and a method of producing an amyloid-like fibril and use thereof are further described.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: April 5, 2011
    Assignee: National Tsing Hua University
    Inventors: Margaret Dah-Tsyr Chang, Yuh-Ju Sun, Ping-Chiang Lyu, Shu-Chuan Lin, Wei-I Chou
  • Patent number: 7851215
    Abstract: A recombinant protein is prepared comprising a polypeptide of interest and a starch binding domain (SBD). The said SBD is obtainable from glucoamylase of fungi genus Rhizopus. The said recombinant protein comprising the said SBD can be purified by contacting with an affinity matrix such as starch, the SBD binds to the affinity matrix to isolate the recombinant protein. The recombinant protein can be purified by separating the association between the SBD and the affinity matrix by acid, alkaline, salt, or sugar. The polypeptide of interest may be an antibody, an antigen, a therapeutic compound, an enzyme, or a protein and may apply in pathogen destruction, vaccine producing, and oral care product manufacturing. The SBD further provides as a tool to screen or identify polysacchrides.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: December 14, 2010
    Assignee: Simpson Biotech Co., Ltd.
    Inventors: Margaret Dah-Tsyr Chang, Chia-Chin Sheu
  • Publication number: 20100291656
    Abstract: The present invention provides a method and a system for protein purification using a starch binding protein (SBP)-tagged recombinant protein. SBP-binding matrixes are also disclosed in the invention to recover the SBP-tagged recombinant protein. Thus, purifying a target protein is re-usable, convenient and low cost by the present invention.
    Type: Application
    Filed: May 11, 2010
    Publication date: November 18, 2010
    Applicant: SIMPSON BIOTECH CO., LTD.
    Inventors: Margaret Dah-Tsyr Chang, Chia-Chin Sheu
  • Publication number: 20100291540
    Abstract: The present invention relates to an antibody mimetic of carbohydrate binding module (CBM) which specifically binds to an epitope on HIV glycoprotein. The present invention also relates to a method of detecting HIV glycoprotein.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 18, 2010
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Margaret Dah-Tsyr Chang, Yuan-Chuan Lee, Rong-Yuan Huang, Shu-Chuan Lin, Wei-I Chou, Shi-Hwei Liu
  • Publication number: 20100291601
    Abstract: The present invention relates to an antibody mimetic of carbohydrate binding module (CBM) which specifically binds to an epitope on HIV glycoprotein. The present invention also relates to a method of detecting HIV glycoprotein.
    Type: Application
    Filed: April 6, 2010
    Publication date: November 18, 2010
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Margaret Dah-Tsyr Chang, Yuan-Chuan Lee, Rong-Yuan Huang, Shu-Chuan Lin, Wei-I Chou, Shi-Hwei Liu
  • Patent number: 7785872
    Abstract: The present invention relates to a method for producing a protein, novel nucleic acid fragment, an expression vector, and a method for enhancing the protein production in Pichia. The present invention provides that the combination of the modified signal peptide, increased copy number of the gene, and/or overexpressed Sec4p resulted in high level secretion of proteins.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: August 31, 2010
    Assignee: Simpson Biotech Co., Ltd.
    Inventors: Margaret Dah-Tsyr Chang, Chia-Chin Sheu
  • Patent number: 7759089
    Abstract: A recombinant protein is prepared comprising a polypeptide of interest and a starch binding domain (SBD). The said SBD is obtainable from glucoamylase of fungi genus Rhizopus. The said recombinant protein comprising the said SBD can be purified by contacting with an affinity matrix such as starch, the SBD binds to the affinity matrix to isolate the recombinant protein. The recombinant protein can be purified by separating the association between the SBD and the affinity matrix by acid, alkaline, salt, or sugar. The polypeptide of interest may be an antibody, an antigen, a therapeutic compound, an enzyme, or a protein and may apply in pathogen destruction, vaccine producing, and oral care product manufacturing. The SBD further provides as a tool to screen or identify polysacchrides.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: July 20, 2010
    Assignee: Simpson Biotech Co., Ltd.
    Inventors: Margaret Dah-Tsyr Chang, Chia-Chin Sheu
  • Publication number: 20100099855
    Abstract: A recombinant protein is prepared comprising a polypeptide of interest and a starch binding domain (SBD). The said SBD is obtainable from glucoamylase of fungi genus Rhizopus. The said recombinant protein comprising the said SBD can be purified by contacting with an affinity matrix such as starch, the SBD binds to the affinity matrix to isolate the recombinant protein. The recombinant protein can be purified by separating the association between the SBD and the affinity matrix by acid, alkaline, salt, or sugar. The polypeptide of interest may be an antibody, an antigen, a therapeutic compound, an enzyme, or a protein and may apply in pathogen destruction, vaccine producing, and oral care product manufacturing. The SBD further provides as a tool to screen or identify polysacchrides.
    Type: Application
    Filed: December 21, 2009
    Publication date: April 22, 2010
    Applicant: SIMPSON BIOTECH CO., LTD.
    Inventors: MARGARET DAH-TSYR CHANG, CHIA-CHIN SHEU
  • Publication number: 20100048880
    Abstract: The present invention relates to a starch binding domain, a recombinant protein and a complex thereof. The present invention also relates to a method for separating a recombinant protein comprising a starch binding domain of the present invention.
    Type: Application
    Filed: October 31, 2006
    Publication date: February 25, 2010
    Applicant: SIMPSON BIOTECH CO., LTD.
    Inventors: Margaret Dah-Tsyr Chang, Ping-Chiang Lyu, Yuh-Ju Sun, Chia-Chin Sheu
  • Patent number: 7662918
    Abstract: A recombinant protein is prepared comprising a polypeptide of interest and a starch binding domain (SBD). The said SBD is obtainable from glucoamylase of fungi genus Rhizopus. The said recombinant protein comprising the said SBD can be purified by contacting with an affinity matrix such as starch, the SBD binds to the affinity matrix to isolate the recombinant protein. The recombinant protein can be purified by separating the association between the SBD and the affinity matrix by acid, alkaline, salt, or sugar. The polypeptide of interest may be an antibody, an antigen, a therapeutic compound, an enzyme, or a protein and may apply in pathogen destruction, vaccine producing, and oral care product manufacturing. The SBD further provides as a tool to screen or identify polysacchrides.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: February 16, 2010
    Assignee: Simpson Biotech Co., Ltd.
    Inventors: Margaret Dah-Tsyr Chang, Chia-Chin Sheu
  • Publication number: 20100016239
    Abstract: A method for reducing cytotoxicity of eosinophil derived toxins comprising administering to a subject an effective amount of heparin, heparan sulfate, a potent heparanase inhibitor or a polypeptide which has sequence as follows: BZBXBX, XBBBXXBX, XBBXBX, BBXXBBBXXBB, BXBBXB, XBBBXXBBBXXBBX, or TXXBXXTBXXXTBB, wherein X represents any amino acid, Z represents an aromatic amino acid, and B represents a basic amino acid and T represents a turn.
    Type: Application
    Filed: August 21, 2009
    Publication date: January 21, 2010
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Margaret Dah-Tsyr Chang, Tan-chi Fan, Shu-Chuan Lin
  • Patent number: 7595374
    Abstract: A method for reducing cytotoxicity of eosinophil derived toxins comprising administering to a subject an effective amount of heparin, heparan sulfate, a potent heparanase inhibitor or a polypeptide which has sequence as follows: BZBXBX, XBBBXXBX, XBBXBX, BBXXBBBXXBB, BXBBXB, XBBBXXBBBXXBBX, or TXXBXXTBXXXTBB, wherein X represents any amino acid, Z represents an aromatic amino acid, and B represents a basic amino acid and T represents a turn.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: September 29, 2009
    Assignee: National Tsing Hua University
    Inventors: Margaret Dah-Tsyr Chang, Tan-chi Fan, Shu-Chuan Lin
  • Publication number: 20090186369
    Abstract: The present invention relates to a polysaccharide-protein binding model of SBD, and a fibril-forming 14-residue peptide consisting of X1NNNX2X3NYQX4X5X6X7X8, wherein the X1 and X8 mean a pair of opposite charged amino acid residues, and the X2, X3, X4, X5, X6, or X7 means an amino acid residue. The present invention also relates to a mixture for diminising a polysaccharide, comprising at least two starch binding domains (SBDs) and a polysaccharide in a helix form. The present invention further relates to a method of providing an oligosaccharide, and a method of producing an amyloid-like fibril and use thereof.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 23, 2009
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Margaret Dah-Tsyr Chang, Yuh-Ju Sun, Ping-Chiang Lyu, Shu-Chuan Lin, Wei-I Chou