Mouse Transthyretin-related Protein Is a Hydrolase which Degrades 5-Hydroxyisourate, the End Product of the Uricase Reaction

  • Lee, Youra (Systemic Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Park, Byoung Chul (Systemic Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Lee, Do Hee (Systemic Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Bae, Kwang-Hee (Systemic Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Cho, Sayeon (College of Pharmacy, Chung-Ang University) ;
  • Lee, Choong Hwan (Division of Bioscience and Biotechnology, IBST, Konkuk University) ;
  • Lee, Jong Suk (Division of Bioscience and Biotechnology, IBST, Konkuk University) ;
  • Myung, Pyung Keun (College of Pharmacy, Chungnam National University) ;
  • Park, Sung Goo (Systemic Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology)
  • 투고 : 2005.10.11
  • 심사 : 2006.05.23
  • 발행 : 2006.10.31

초록

Uric acid is the end product of the purine degradation pathway in humans. It is catabolized to allantoin by urate oxidase or uricase (E.C. 1.7.3.3.) in most vertebrates except humans, some primates, birds, and certain species of reptiles. Here we provide evidence that mouse transthyretin-related protein facilitates the hydrolysis of 5-hydroxyisourate, the end product of the uricase reaction. Mutagenesis experiments showed that the residues that are absolutely conserved across the TRP family, including His11, Arg51, His102, and the C-terminal Tyr-Arg-Gly-Ser, may constitute the active site of mTRP. Based on these results, we propose that the transthyretin-related proteins present in diverse organisms are not functionally related to transthyretin but actually function as hydroxyisourate hydrolases.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Science and Technology, Ministry of Industry, Commerce and Energy of Korea

참고문헌

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