Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Purification and NMR Studies of RNA Polymerase II C-Terminal Domain Phosphatase 1 Containing Ubiquitin Like Domain

  • Ko, Sung-Geon (Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University) ;
  • Lee, Young-Min (Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University) ;
  • Yoon, Jong-Bok (Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University) ;
  • Lee, Weon-Tae (Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University)
  • Published : 2009.05.20
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Abstract

RNA polymerase II C-terminal domain phosphatase 1 containing ubiquitin like domain (UBLCP1) has been identified as a regulatory molecule of RNA polymerase II. UBLCP1 consists of ubiquitin like domain (UBL) and phosphatase domain homologous with UDP and CTD phosphatase. UBLCP1 was cloned into the E.coli expression vectors, pET32a and pGEX 4T-1 with TEV protease cleavage site and purified using both affinity and gel-filtration chromatography. Domains of UBLCP1 protein were successfully purified as 7 mg/500 mL (UBLCP1, 36.78 KDa), 32 mg/500 mL (UBL, 9 KDa) and 8 mg/500 mL (phosphatase domain, 25 KDa) yielded in LB medium, respectively. Isotope-labeled samples including triple-labeled ($^2H/^{15}N/^{13}C$) UBLCP1 were also prepared for hetero-nuclear NMR experiments. $^{15}N-^{1}H$ 2D-HSQC spectra of UBLCP1 suggest that both UBL and phosphatase domain are properly folded and structurally independent each other. These data will promise us further structural investigation of UBLCP1 by NMR spectroscopy and/or X-ray crystallography.

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References

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