Abstract:
PURPOSE: A thermal resistant DNA polymerase which is derived from Thermococcus celer with DNA polymerization activity and proofreading activity is provided to widely use in various nucleic acid polymerization. CONSTITUTION: A thermal resistant Tce DNA polymerase isolated from Thermococcus celer contains an amino acid of seuqnce number 10. The Tce DNA polymerase has an optimal activity in 20-35 mM of (NH_4)_2SO_4 and 4-16 mM of Mg^2+ at pH 6.5 and 75°C. A nucleic acid molecule encoding the Tce DNA polymerase contains a nucleic acid sequence of sequence number 9. A pTCE vector contains a nucleic acid molecule encoding the Tce DNA polymerase. A method for preparing the Tce DNA polymerase comprises: a step of preparing a vector expressing the Tce DNA polymerase; a step of transforming the vector to the microorganism; a step of culturing the transformant; and a step of collecting protein from the transformant.
Abstract:
본 발명은 DNA 중합 활성(DNA polymerization activity) 및 교정 활성 (proofreading activity)을 모두 가지는 써모코커스 씰러리크레센스 유래의 DNA 중합효소( Thermococcus
celericrescens DNA polymerase, Tcel DNA polymerase, 이하 ' Tcel DNA 중합효소'라고 함) 및 상기 Tcel DNA 중합효소에서 점 돌연변이에 의하여 752번째 아미노산인 알라닌이 라이신으로, 213번째 아미노산인 아스파라진이 아스팔틱산으로 이중 치환된 돌연변이 써모코커스 씰러리크레센스 A752K/N213D DNA 중합효소 ( Thermococcus
celericrescens A752K/N213D DNA polymerase, Tcel A752K/N213D DNA polymerase, 이하 ' Tcel A752K/N213D DNA 중합효소'라고 함)에 관한 것이다.
Abstract:
PURPOSE: A Thermococcus celericrescens-derived DNA polymerase having DNA polymerization activity and proofreading activity is provided to enable various nucleic acid polymerization reactions and to improved PCR efficiency and thermal resistance. CONSTITUTION: A Tcel DNA polymerase isolated from Thermococcus celericrescens has an amino acid sequence of sequence number 14. A nucleic acid molecule encoding the polymerase has a base of sequence number 13. A recombinant vector contains the nucleic acid molecule. TcelA752K/N213D DNA polymerase has an optimal activity at pH 8, 70 Deg. C. 100 mM of KCl, and 2 mM or Mg^2+. A recombinant vector, pTCELM vector, contains the nucleic acid molecule encoding the TcelA752K/N213D DNA polymerase. A microorganism transformed by the vector is E.coli Rosetta(DE3)pLysS / pTCELM (deposit number KACC91614P).