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).
Abstract:
본 발명은 사이크로박터 스피시스 HJ147 균주 유래의 우라실-DNA 글리코실라제(UDG) 및 이의 용도에 관한 것으로, 보다 구체적으로 저온성 세균인 사이크로박터 스피시스 HJ147 ( Psychrobacter sp. HJ147) 유래의 우라실-DNA 글리코실라제 (uracil- DNA glycosylase)의 유전자 및 그로부터 유추되는 아미노산 서열, Psp HJ147 우라실-DNA 글리코실라제 (UDG) 유전자의 대장균 ( Escherichia coli ) 내에서 발현 및 정제, 이를 통해서 생산된 UDG의 특성 및 중합효소 연쇄반응 (PCR)에의 이용에 관한 것이다. 본 발명의 우라실-DNA 글리코실라제 (UDG)는 우라실을 포함하고 있는 DNA 기질 내에서 우라실 염기를 특이적으로 분해하는 활성이 있고 저온에서 쉽게 변성하는 특징이 있어 dUTP를 이용한 중합효소 연쇄반응 (PCR) 과정 중에서 발생하는 교차 오염을 쉽게 제거 할 수 있다. 따라서 본 발명의 Psp HJ147 우라실-DNA 글리코실라제 (UDG)는 PCR 반응의 정확도, 순도 및 증폭 효율을 증가시키는데 효과적으로 사용될 수 있다.
Abstract:
PURPOSE: A hot-start PCR method based on protein trans-splicing of Neq L fragment and Neq S fragment is provided to be used in a technique of preventing carryover contamination. CONSTITUTION: A hot-start PCR method based on protein trans-splicing of NeqL fragment and NeqS fragment containing intein comprises: a step of preparing a PCR reaction solution; a step of adding the NeqL fragment and NeqS fragment; a step of performing trans-splicing to form a polypeptide with NeqDNA polymerase activity; and a step of performing DNA denaturation, primer annealing, and elongation.
Abstract:
An uracil-DNA glycosylase(UDG) derivated from Bacillus sp. HJ171 strain is provide to remove carry-over contamination caused by PCR process and improve accuracy of PCR when performing clinical diagnosis using PCR. An uracil-DNA glycosylase(UDG) derivated from Bacillus sp. HJ171 strain comprises amino acid sequence indicated as a sequence No. 2[SEQ ID NO:2]. The UDG polynucleotide comprises a sequence indicated with a sequence No. 1. The recombinant vector pTBSU(KACC 95065P) comprises the UDG polynucleotide. The composition for PCR comprises the uracil-DNA glycosylase(UDG) of Bacillus sp. HJ171 strain, polymerase, the different nucleotide triphosphate, primer which enables of bonding and amplifying with a specific nucleic acid site, and buffer. Carry-over contamination of PCR product is removed by performing PCR with the DNA substrate including uracil and the composition for PCR including UDG in 25-50°C for 0-5 minutes it does with 0-5 weight inside polymerase chain reaction and the cross contaminated of the PCR product is removed.
Abstract:
An uracil-DNA glycosylase(UDG) is provided to show the activity of decomposing uracil bases specifically in a DNA substrate including uracil and be easily denatured at low temperature, thereby easily eliminating cross-contamination occurred during PCR using dUTP. A UDG of Psychrobacter sp. HJ147 includes an amino acid sequence descried as SEQ ID : NO. 2. A polynucleotide encoding the UDG includes a sequence of SEQ ID : NO. 1. A recombinant vector pTPSUDG includes the polynucleotide. A bacteria transformed by the vector is cultured to produce the UDG. To eliminate cross-contamination of a PCR product, a DNA substrate including a uracil base and the PCR reaction composition including the UDG are reacted at a temperature of less than 50 deg.C for 0-5 minute(s).
Abstract translation:提供尿嘧啶-DNA糖基化酶(UDG),以显示尿嘧啶碱基分解在包括尿嘧啶的DNA底物中的活性,并且在低温下容易变性,从而容易地消除使用dUTP的PCR期间发生的交叉污染。 精油菌的UDG HJ147包括如SEQ ID NO:1所示的氨基酸序列。 编码UDG的多核苷酸包括SEQ ID NO: 重组载体pTPSUDG包括多核苷酸。 培养由载体转化的细菌以产生UDG。 为了消除PCR产物的交叉污染,包含尿嘧啶碱基的DNA底物和包含UDG的PCR反应组合物在小于50℃的温度下反应0-5分钟。