Patents by Inventor Su Lim Choi
Su Lim Choi 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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Publication number: 20230356187Abstract: Provided are immunoglobulin-binding protein variants with increased alkali tolerance, and uses thereof, and more particularly to immunoglobulin-binding protein variants with increased alkali tolerance relative to the wild type due to mutations in amino acids at specific positions in the B3 domain of the immunoglobulin-binding proteinsType: ApplicationFiled: April 24, 2023Publication date: November 9, 2023Inventors: Su Lim CHOI, So Young PARK, Sol A PARK, Yeo Won SIM
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Patent number: 10766933Abstract: The present invention relates to a mutated immunoglobulin-binding protein having increased alkaline tolerance and, more specifically, to an immunoglobulin-binding protein in which, with respect to the A-domain of Staphylococcal protein A, or a functional variant thereof, an amino acid at a specific site is mutated and thereby exhibits an increased chemical stability at an alkaline pH value in comparison to a parental molecule. The present invention can provide an antibody-purifying immunoglobulin-binding protein ligand and matrix which have enhanced alkaline tolerance and accordingly enhanced stability in multiple times of alkaline cleaning.Type: GrantFiled: January 4, 2019Date of Patent: September 8, 2020Assignee: Amicogen, Inc.Inventors: Yong Chul Shin, Zhe Piao, Su-Lim Choi, Yang Ho Jo, So-Young Park, Dae Beom Kwon
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Publication number: 20190202871Abstract: The present invention relates to a mutated immunoglobulin-binding protein having increased alkaline tolerance and, more specifically, to an immunoglobulin-binding protein in which, with respect to the A-domain of Staphylococcal protein A, or a functional variant thereof, an amino acid at a specific site is mutated and thereby exhibits an increased chemical stability at an alkaline pH value in comparison to a parental molecule. The present invention can provide an antibody-purifying immunoglobulin-binding protein ligand and matrix which have enhanced alkaline tolerance and accordingly enhanced stability in multiple times of alkaline cleaning.Type: ApplicationFiled: January 4, 2019Publication date: July 4, 2019Inventors: Yong Chul Shin, Zhe Piao, Su-Lim Choi, Yang Ho Jo, So-Young Park, Dae Beom Kwon
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Patent number: 9783859Abstract: A method of detecting and quantifying various enzymatic activities using a constructed artificial genetic circuit GESS (genetic enzyme screening system) for sensing phenolic compounds and a method of screening a trace of activities of target enzymes from a metagenome using the artificial genetic circuit, thereby securing target enzyme genes. When the method for screening and quantifying target enzymatic activity is used, useful genes can be screened from various genetic communities, including environmental or metagenomic libraries, at a single cell level in high throughput (million/day). Further, the sensitivity of the genetic circuit to phenol derivatives and the expression thereof can be controlled, and thus the genetic circuit can rapidly sense and quantify various enzymatic activities. Thus, the method can be advantageously used in the protein engineering technology for enzyme modification.Type: GrantFiled: June 8, 2010Date of Patent: October 10, 2017Assignee: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Seung Goo Lee, Eugene Rha, Su Lim Choi, Jae Jun Song, Jong Hyun Choi, Hee Sik Kim
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Patent number: 9175330Abstract: A method of performing high-throughput screening of various enzymatic activities with high sensitivity using artificial genetic circuits is provided. Particularly, the invention is screening and quantifying the activity of isoprene biosynthesis enzymes using an artificial genetic circuit capable of sensing isoprene. The artificial genetic circuit comprises an isoprene-sensing transcriptional regulator which recognizes isoprene, at least one reporter gene, a isoprene-sensing transcriptional regulator binding region and promoters for genes encoding isoprene-sensing transcriptional regulators and reporter proteins. The artificial genetic circuit detects isoprene liberated from many enzymatic reactions and measures the activity of reporter genes. This system is widely applicable for high throughput and quantitative screening of isoprene biosynthesis enzymes and MEP/MVA pathway enzymes. Therefore, the invention can be advantageously used in the protein engineering technology for enzyme modification.Type: GrantFiled: February 20, 2013Date of Patent: November 3, 2015Assignee: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Seung-Goo Lee, Seo Hyeon Kim, Jongsik Gam, Eugene Rha, Haseong Kim, Su-Lim Choi, EuiSung Choi
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Patent number: 8877446Abstract: The present invention relates to a method for detecting protein-protein interactions in living cells, and more particularly, to a method for providing cells comprising a first construct and a second construct, wherein the first construct comprises a polynucleotide encoding a first fusion protein which comprises a bait protein, a first fluorescent protein and a CBD (cellulose-binding domain) protein, and wherein the second construct comprises a polynucleotide encoding a second fusion protein which comprises a prey protein and a second fluorescent protein so as to allow formation of inclusion bodies, and detecting interactions between the bait protein and the prey protein that are displayed by inclusion bodies, a method for isolating the prey protein bound to the bait protein using the cells comprising the constructs, the cells, and a kit for detecting protein-protein interactions, comprising the constructs.Type: GrantFiled: June 15, 2012Date of Patent: November 4, 2014Assignee: Korea Research Institute of Bioscience and BiotechnologyInventors: Seung Goo Lee, Su-Lim Choi, Jong Sik Gam, Jae Jun Song, Sang Jun Lee
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Publication number: 20140235502Abstract: A method of performing high-throughput screening of various enzymatic activities with high sensitivity using artificial genetic circuits is provided. Particularly, the invention is screening and quantifying the activity of isoprene biosynthesis enzymes using an artificial genetic circuit capable of sensing isoprene. The artificial genetic circuit comprises an isoprene-sensing transcriptional regulator which recognizes isoprene, at least one reporter gene, a isoprene-sensing transcriptional regulator binding region and promoters for genes encoding isoprene-sensing transcriptional regulators and reporter proteins. The artificial genetic circuit detects isoprene liberated from many enzymatic reactions and measures the activity of reporter genes. This system is widely applicable for high throughput and quantitative screening of isoprene biosynthesis enzymes and MEP/MVA pathway enzymes. Therefore, the invention can be advantageously used in the protein engineering technology for enzyme modification.Type: ApplicationFiled: February 20, 2013Publication date: August 21, 2014Inventors: Seung-goo LEE, Seo Hyeon KIM, Jongsik GAM, Eugene RHA, Haseong KIM, Su-Lim CHOI, EuiSung CHOI
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Patent number: 8647854Abstract: The present invention relates to a metagenome-derived alkaline phosphatase, and more particularly to a novel, metagenome-derived alkaline phosphatase screened using a artificial genetic circuit that detects phenolic compounds, and a preparation method thereof. A novel alkaline phosphatase according to the present invention has high activity of dephosphorylating DNA and can be inactivated rapidly by simple heat treatment. Thus, it can be used for a dephosphorylation reaction so that genetic manipulations, including genetic cloning, become efficient. In addition, it can be actively expressed in recombinant microorganisms, and thus can be used in various assays, including enzyme immunoassay.Type: GrantFiled: June 8, 2010Date of Patent: February 11, 2014Assignee: Korea Research Institute of Bioscience and BiotechnologyInventors: Seung Goo Lee, Su Lim Choi, Eugene Rha, Jae Jun Song
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Publication number: 20130052660Abstract: The present invention relates to a method for detecting protein-protein interactions in living cells, and more particularly, to a method for providing cells comprising a first construct and a second construct, wherein the first construct comprises a polynucleotide encoding a first fusion protein which comprises a bait protein, a first fluorescent protein and a CBD (cellulose-binding domain) protein, and wherein the second construct comprises a polynucleotide encoding a second fusion protein which comprises a prey protein and a second fluorescent protein so as to allow formation of inclusion bodies, and detecting interactions between the bait protein and the prey protein that are displayed by inclusion bodies, a method for isolating the prey protein bound to the bait protein using the cells comprising the constructs, the cells, and a kit for detecting protein-protein interactions, comprising the constructs.Type: ApplicationFiled: June 15, 2012Publication date: February 28, 2013Applicant: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Seung Goo Lee, Su-Lim Choi, Jong Sik Gam, Jae Jun Song, Sang Jun Lee
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Publication number: 20130040366Abstract: The present invention relates to a metagenome-derived alkaline phosphatase, and more particularly to a novel, metagenome-derived alkaline phosphatase screened using a artificial genetic circuit that detects phenolic compounds, and a preparation method thereof. A novel alkaline phosphatase according to the present invention has high activity of dephosphorylating DNA and can be inactivated rapidly by simple heat treatment. Thus, it can be used for a dephosphorylation reaction so that genetic manipulations, including genetic cloning, become efficient. In addition, it can be actively expressed in recombinant microorganisms, and thus can be used in various assays, including enzyme immunoassay.Type: ApplicationFiled: June 8, 2010Publication date: February 14, 2013Applicant: Korea Research Institute of Bioscience and BiotechnologyInventors: Seung Goo Lee, Su Lim Choi, Eugene Rha, Jae Jun Song
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Publication number: 20120238470Abstract: A method of detecting and quantifying various enzymatic activities using a constructed artificial genetic circuit GESS (genetic enzyme screening system) for sensing phenolic compounds and a method of screening a trace of activities of target enzymes from a metagenome using the artificial genetic circuit, thereby securing target enzyme genes. When the method for screening and quantifying target enzymatic activity is used, useful genes can be screened from various genetic communities, including environmental or metagenomic libraries, at a single cell level in high throughput (million/day). Further, the sensitivity of the genetic circuit to phenol derivatives and the expression thereof can be controlled, and thus the genetic circuit can rapidly sense and quantify various enzymatic activities. Thus, the method can be advantageously used in the protein engineering technology for enzyme modification.Type: ApplicationFiled: June 8, 2010Publication date: September 20, 2012Inventors: Seung Goo Lee, Eugene Rha, Su Lim Choi, Jae Jun Song, Jong Hyun Choi, Hee Sik Kim