Patents by Inventor Jong Kwon Han

Jong Kwon Han 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).

  • Ammonia-specific 5?-XMP aminase mutant
    Patent number: 8669078
    Abstract: Disclosed herein are ammonia-specific 5?-XMP aminase mutants and a method for preparing the same. A mutation is introduced into the active site of glutamine-dependent catalysis in 5?-XMP aminase. The resulting 5?-XMP aminase mutant is devoid of the glutamine-dependent activity and specifically reacts with external ammonia in converting 5?-XMP into 5?-GMP. Thus, the ammonia-specific 5?-XMP aminase mutant is stabler within cells compared to the wild type, and can be useful in the industrial conversion of 5?-XMP into 5?-GMP.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: March 11, 2014
    Assignee: CJ Cheiljedang Corporation
    Inventors: Jae-Gu Pan, Heung-Chae Jung, Eui-Joong Kim, Han-Seung Lee, Young Hoon Park, Hyoung Suk Kim, Jong-Kwon Han, Jin Nam Lee, Ki-Hoon Oh, Jeong Hwan Kim, Yoon-Suk Oh, Jae Ick Sim, Kuk-Ki Hong, Kyung Oh Choi, Hyun Soo Kim, Min-Ji Baek, Tae Sun Kang
  • Ammonia-Specific 5'-Xmp Aminase Mutant
    Publication number: 20080318278
    Abstract: Disclosed herein are ammonia-specific 5?-XMP aminase mutants and a method for preparing the same. A mutation is introduced into the active site of glutamine-dependent catalysis in 5?-XMP aminase. The resulting 5?-XMP aminase mutant is devoid of the glutamine-dependent activity and specifically reacts with external ammonia in converting 5?-XMP into 5?-GMP. Thus, the ammonia-specific 5?-XMP aminase mutant is stabler within cells compared to the wild type, and can be useful in the industrial conversion of 5?-XMP into 5?-GMP.
    Type: Application
    Filed: December 14, 2006
    Publication date: December 25, 2008
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Jae-Gu Pan, Heung-Chae Jung, Eui-Joong Kim, Han-Seung Lee, Young Hoon Park, Hyoung Suk Kim, Jong-Kwon Han, Jin Nam Lee, Ki-Hoon Oh, Jeong Hwan Kim, Yoon-Suk Oh, Jae Ick Sim, Kuk-Ki Hong, Kyung Oh Choi, Hyun Soo Kim, Min-Ji Baek, Tae Sun Kang
  • Microorganism for producing riboflavin and method for producing riboflavin using the same
    Patent number: 7166456
    Abstract: Riboflavin-producing Bacillus subtilis which is resistant to proline analogue, and a method for producing riboflavin using the Bacillus subtilis are provided.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: January 23, 2007
    Assignee: CJ Corp.
    Inventors: Kwang Ho Lee, Young Hoon Park, Jong Kwon Han, Jang Hee Park, Kyung Han Lee, Hyang Choi
  • Microorganism for producing riboflavin and method for producing riboflavin using the same
    Patent number: 7078222
    Abstract: Riboflavin-producing Bacillus subtilis which is resistant to threonine analogue, and a method for producing riboflavin using the Bacillus subtilis are provided. The subject Bacillus subtilis referred to as Bacillus subtilis CJKB0002 has the accession number KCCM-10446, having been deposited in Korean Culture Center of Microorganisms (KCCM), 361-221, Yurim B/D, Hongie-1-dong, Seodaemun-gut, Seoul 120-091 Republic of Korea, on Nov. 18, 2002.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: July 18, 2006
    Assignee: CJ Corp.
    Inventors: Kwang Ho Lee, Young Hoon Park, Jong Kwon Han, Jang Hee Park, Kyung Han Lee, Hyang Choi
  • Corynebacterium ammoniagenes KCCM 10340 for producing 5'-xanthylic acid
    Patent number: 6821768
    Abstract: The invention relates to microorganism producing 5′-xanthylic acid. A 3,4-dehydro-DL-proline resistant Corynebacterium ammoniagenes CJXPK001 strain is provided for producing 5′-xanthylic acid. It is a mutant strain of Corynebacterium ammoniagenes KFCC 10743 having a lower resistance to 3,4-dehydro-DL-proline. The mutant strain is not affected by osmotic pressure caused by accumulated, highly concentrated solute in a culture medium, and it can produce 5′-xanthylic acid at a high yield and concentration rate.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: November 23, 2004
    Assignee: CJ Corporation
    Inventors: Jeong-Hwan Kim, Young-Hyeon Kwag, Jang-Hee Park, Eun-Sung Koh, Yoon-Suk Oh, Jea-Young Chang, Kwang-Ho Lee, Jae-Ick Sim, Jong-Kwon Han, Young-Hoon Park
  • Microorganism for producing riboflavin and method for producing riboflavin using the same
    Publication number: 20040110249
    Abstract: Riboflavin-producing Bacillus subtilis which is resistant to proline analogue, and a method for producing riboflavin using the Bacillus subtilis are provided.
    Type: Application
    Filed: June 4, 2003
    Publication date: June 10, 2004
    Inventors: Kwang Ho Lee, Young Hoon Park, Jong Kwon Han, Jang Hee Park, Kyung Han Lee, Hyang Choi
  • Microorganism for producing riboflavin and method for producing riboflavin using the same
    Publication number: 20040110248
    Abstract: Riboflavin-producing Bacillus subtilis which is resistant to threonine analogue, and a method for producing riboflavin using the Bacillus subtilis are provided.
    Type: Application
    Filed: June 4, 2003
    Publication date: June 10, 2004
    Inventors: Kwang Ho Lee, Young Hoon Park, Jong Kwon Han, Jang Hee Park, Kyung Han Lee, Hyang Choi
  • Microorganism overproducing 5'-xanthylic acid
    Publication number: 20030148498
    Abstract: The invention relates to microorganism producing 5′-xanthylic acid. More specifically, the invention relates to Corynebacterium ammoniagenes CJXPK001 which is a mutant strain of Corynebacterium ammoniagenes KFCC 10743 having a resistance to 3,4-dehydro-DL-proline.
    Type: Application
    Filed: December 19, 2002
    Publication date: August 7, 2003
    Inventors: Jeong-Hwan Kim, Young-Hyeon Kwag, Jang-Hee Park, Eun-Sung Koh, Yoon-Suk Oh, Jea-Young Chang, Kwang-Ho Lee, Jae-Ick Sim, Jong-Kwon Han, Young-Hoon Park