Patents by Inventor Imsang Lee

Imsang Lee 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).

  • NOVEL CITRATE SYNTHASE VARIANT AND METHOD FOR PRODUCING O-ACETYL-L-HOMOSERINE OR L-METHIONINE USING SAME
    Publication number: 20240150730
    Abstract: The present disclosure relates to a novel citrate synthase variant, a microorganism comprising the variant, and a method for producing O-acetyl-L-homoserine and L-methionine using the microorganism.
    Type: Application
    Filed: March 10, 2022
    Publication date: May 9, 2024
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Jin Sook CHANG, Seung Hyun CHO, Seo-Yun KIM, Jaemin LEE, Min Ji BAEK, Imsang LEE
  • NOVEL ACETOHYDROXY ACID SYNTHASE VARIANT AND MICROORGANISM INCLUDING THE SAME
    Publication number: 20230203106
    Abstract: The present disclosure relates to an acetohydroxy acid synthase variant, a polynucleotide encoding the variant, a microorganism including the variant, and a method of producing L-isoleucine using the microorganism.
    Type: Application
    Filed: June 10, 2020
    Publication date: June 29, 2023
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Kyungrim Kim, Tae Yeon Kim, Imsang Lee, Kwang Woo Lee, Heeyeong Kim, Kwang Soo Shin
  • Modified polypeptide with attenuated activity of citrate synthase and method for producing L-amino acid using the same
    Patent number: 11667936
    Abstract: The present disclosure relates to a modified polypeptide with attenuated activity of citrate synthase and a method for producing an aspartate-derived L-amino acid using the modified polypeptide.
    Type: Grant
    Filed: October 6, 2022
    Date of Patent: June 6, 2023
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Jaewon Jang, Kwang Woo Lee, Yong Uk Shin, Imsang Lee
  • NOVEL OF L-THREONINE DEHYDRATASE VARIANT AND METHOD OF PRODUCING L-ISOLEUCINE USING THE SAME
    Publication number: 20230098971
    Abstract: Provided are a novel L-threonine dehydratase variant and a method of producing L-isoleucine using the same.
    Type: Application
    Filed: April 21, 2021
    Publication date: March 30, 2023
    Inventors: Kyungrim KIM, Imsang LEE, Heeyeong KIM, Kwang Woo LEE
  • MODIFIED POLYPEPTIDE WITH ATTENUATED ACTIVITY OF CITRATE SYNTHASE AND METHOD FOR PRODUCING L-AMINO ACID USING THE SAME
    Publication number: 20230046561
    Abstract: The present disclosure relates to a modified polypeptide with attenuated activity of citrate synthase and a method for producing an aspartate-derived L-amino acid using the modified polypeptide.
    Type: Application
    Filed: October 6, 2022
    Publication date: February 16, 2023
    Inventors: Jaewon JANG, Kwang Woo LEE, Yong Uk SHIN, Imsang LEE
  • NOVEL MODIFIED POLYPEPTIDE WITH ATTENUATED ACTIVITY OF CITRATE SYNTHASE AND METHOD FOR PRODUCING L-AMINO ACID USING THE SAME
    Publication number: 20230040524
    Abstract: The present disclosure relates to a modified polypeptide with attenuated activity of citrate synthase, a microorganism producing leucine comprising the modified polypeptide, and a method for producing an L-amino acid using the microorganism.
    Type: Application
    Filed: August 4, 2020
    Publication date: February 9, 2023
    Inventors: Chan Hong AHN, Ju Eun KIM, Hyun-jung BAE, Imsang LEE, Ji Hye LEE, Hayun LEE
  • NOVEL SERINE PROTEASE VARIANT
    Publication number: 20220411774
    Abstract: The present disclosure provides a novel serine protease variant.
    Type: Application
    Filed: November 25, 2020
    Publication date: December 29, 2022
    Inventors: Joo Hee LEE, Jinwoo SUNG, Jong-cheol SEOK, Ji Hyun LEE, Se Hoon SIM, Imsang LEE
  • MODIFIED POLYPEPTIDE OF GLUTAMINE SYNTHETASE AND METHOD OF PRODUCING L-GLUTAMINE USING THE SAME
    Publication number: 20220396815
    Abstract: The present disclosure relates to a modified polypeptide of glutamine synthetase having enhanced activity and a method of producing L-glutamine using the same. Since production of L-glutamine may be increased by using the novel modified polypeptide without a decrease in a growth rate compared to wild-type strains having glutamine synthetase activity, the modified polypeptide may be widely used for mass production of L-glutamine.
    Type: Application
    Filed: March 4, 2021
    Publication date: December 15, 2022
    Inventors: Su Jin CHOI, Imsang LEE, Heeyeong KIM, Byeong Soo KIM, Kwang Woo LEE
  • L-tryptophan-exporting protein variant and method for producing L-tryptophan using the same
    Patent number: 11524981
    Abstract: The present disclosure relates to a protein variant having a tryptophan-exporting activity, an L-tryptophan-producing microorganism expressing the protein variant, and a method for producing L-tryptophan using the microorganism.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: December 13, 2022
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Moo Young Jung, Hyun Ah Kim, Chang Il Seo, Imsang Lee, Ji-won Kim, Tae Yeon Kim, Sung Kwang Son, Ki Yong Cheong
  • Modified polypeptide with attenuated activity of citrate synthase and method for producing L-amino acid using the same
    Patent number: 11499173
    Abstract: The present disclosure relates to a modified polypeptide with attenuated activity of citrate synthase and a method for producing an aspartate-derived L-amino acid using the modified polypeptide.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: November 15, 2022
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Jaewon Jang, Kwang Woo Lee, Yong Uk Shin, Imsang Lee
  • VARIANT DIHYDRODIPICOLINATE REDUCTASE POLYPEPTIDE AND METHOD OF PRODUCING L-THREONINE USING THE SAME
    Publication number: 20220356480
    Abstract: The present disclosure relates to a variant polypeptide having attenuated dihydrodipicolinate reductase activity and a method of producing L-threonine using the same.
    Type: Application
    Filed: August 6, 2020
    Publication date: November 10, 2022
    Inventors: Mina BAEK, Su Yon KWON, Imsang LEE, Seung-ju SON, Kwang Woo LEE
  • MODIFIED POLYPEPTIDE OF MESO-DIAMINOPIMELATE DEHYDROGENASE AND METHOD FOR PRODUCING L-THREONINE USING THE SAME
    Publication number: 20220356479
    Abstract: The present disclosure relates to a modified polypeptide, in which the activity of meso-diaminopimelate is weakened, and a method for producing L-threonine using the same.
    Type: Application
    Filed: August 13, 2020
    Publication date: November 10, 2022
    Inventors: Mina BAEK, Seung-ju SON, Su Yon KWON, Imsang LEE, Kwang Woo LEE
  • NOVEL L-TRYPTOPHAN-EXPORTING PROTEIN VARIANT AND METHOD FOR PRODUCING L-TRYPTOPHAN USING THE SAME
    Publication number: 20220009973
    Abstract: The present disclosure relates to a protein variant having a tryptophan-exporting activity, an L-tryptophan-producing microorganism expressing the protein variant, and a method for producing L-tryptophan using the microorganism.
    Type: Application
    Filed: March 20, 2020
    Publication date: January 13, 2022
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Moo Young Jung, Hyun Ah Kim, Chang Il Seo, Imsang Lee, Ji-won Kim, Tae Yeon Kim, Sung Kwang Son, Ki Yong Cheong
  • MODIFIED POLYPEPTIDE WITH ATTENUATED ACTIVITY OF CITRATE SYNTHASE AND METHOD FOR PRODUCING L-AMINO ACID USING THE SAME
    Publication number: 20210355514
    Abstract: The present disclosure relates to a modified polypeptide with attenuated activity of citrate synthase and a method for producing an aspartate-derived L-amino acid using the modified polypeptide.
    Type: Application
    Filed: February 12, 2019
    Publication date: November 18, 2021
    Inventors: Jaewon JANG, Kwang Woo LEE, Yong Uk SHIN, Imsang LEE
  • O-acetylhomoserine sulfhydrylase variant and method for producing L-methionine using same
    Patent number: 10378031
    Abstract: The present disclosure relates to a novel O-acetylhomoserine sulfhydrylase variant, a polynucleotide encoding the same, a vector comprising the polynucleotide, a strain capable of expressing the variant, and a method for producing L-methionine using the variant.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: August 13, 2019
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Imsang Lee, Sung Kwang Son, Hyeryun Yoo, Jae Hee Lee, Joo Hee Lee, Jin Sook Chang, Jin-Geun Choi, So Young Kim, Yong Uk Shin
  • O-ACETYLHOMOSERINE SULFHYDRYLASE VARIANT AND METHOD FOR PRODUCING L-METHIONINE USING SAME
    Publication number: 20180355389
    Abstract: The present disclosure relates to a novel O-acetylhomoserine sulfhydrylase variant, a polynucleotide encoding the same, a vector comprising the polynucleotide, a strain capable of expressing the variant, and a method for producing L-methionine using the variant.
    Type: Application
    Filed: October 13, 2016
    Publication date: December 13, 2018
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Imsang Lee, Sung Kwang Son, Hyeryun Yoo, Jae Hee Lee, Joo Hee Lee, Jin Sook Chang, Jin-Geun Choi, So Young Kim, Yong Uk Shin