KR101644043B1 - Rna에 특이적으로 결합하는 항체 - Google Patents
Rna에 특이적으로 결합하는 항체 Download PDFInfo
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- KR101644043B1 KR101644043B1 KR1020140031768A KR20140031768A KR101644043B1 KR 101644043 B1 KR101644043 B1 KR 101644043B1 KR 1020140031768 A KR1020140031768 A KR 1020140031768A KR 20140031768 A KR20140031768 A KR 20140031768A KR 101644043 B1 KR101644043 B1 KR 101644043B1
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- antibody
- rna
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- amino acid
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Abstract
Description
도 2는 패닝법을 이용하여 선별한 파아지에 디스플레이된 다클론 Fab 항체 (polyclonal Fab antibody)의 RNA에 대한 결합력을 ELISA로 분석한 결과를 나타낸 것이다.
도 3은 패닝법을 이용하여 선별한 파아지에 디스플레이된 Fab 형태의 단일 클론 항체의 RNA에 대한 결합력을 닷 블랏으로 분석한 결과를 나타낸 것이다.
도 4는 동물 세포주에서 발현된 항체를 정제한 후 SDS-PAGE로 분석할 결과를 나타낸 것이다.
도 5는 동물 세포주에서 발현된 항체를 정제한 후 ELISA로 분석한 결과를 나타낸 것이다.
도 6은 BC200 RNA를 인식하는 항체의 CDR 서열 및 항체-RNA 복합체의 해리상수를 나타낸 것이다.
도 7은 항체-RNA 복합체의 해리상수를 구하기 위한 결합법을 나타낸 것이다.
도 8은 대장균에서 유래한 6S RNA를 음성 대조군으로 사용한 경우의 결합법을 나타낸 것이다.
도 9는 PCR 돌연변이법을 동반한 sib 선별(selection)을 이용한 새로운 친화도 성숙과정(affinity maturation)의 모식도를 나타낸 것이다.
도 10은 MabBC200-A 항체로부터 유래되어 친화도 성숙 과정을 거친 클론들의 CDR 서열 및 항체-RNA 복합체의 해리상수를 나타낸 것이다.
도 11은 친화도 성숙과정을 거친 항체-BC200 RNA 복합체의 해리 상수를 구하기 위한 결합법을 나타낸 것이다.
도 12는 RNA(51-120)과 그 유도체들의 2차 구조를 나타낸 것이다. RNA(51-120)는 BC200 RNA의 51~120번의 서열 및 5’끝에 2개, 3’끝에 1개를 추가로 가진, 총 73개의 핵산으로 이루어져 있으며, MabBC200-A3와 결합하는 자리는 빨간 글자로 표시하였다.
도 13은 항체 MabBC200-A3에 결합하는 RNA를 찾기 위한 SELEX의 모식도를 나타낸 것이며, IP는 면역침강을 의미한다.
도 14는 SELEX 8라운드를 마친 후 선택된 RNA들의 2차 구조를 나타낸 것이며, 항체와 결합하는 자리는 빨간 글자로 표시하고, 랜덤화 된 서열은 박스표시하였다.
도 15는 각 RNA-항체 복합체의 해리 상수를 구하는 결합법을 나타낸 것이다.
도 16은 RNA(51-120) 및 그 유도체들의 RNA-항체 복합체의 해리 상수를 구하기 위한 결합법을 나타낸 것이다.
도 17은 히드록실 라디칼 (hydroxyl radical) 발자국법을 이용하여 0, 5, 10, 및 50nM의 MabBC200-A3와 BC200 RNA의 결합영역을 나타낸 것이다.
도 18은 BC200 RNA 구조 중 항체와 결합하는 BC200 RNA의 영역을 낸 것이다.
도 19는 BC200 RNA 구조 중 항체가 결합하고 있는 영역을 포함하는 51번부터 119번 염기까지 예측한 3차 구조를 나타낸 것이다.
도 20은 유방암세포주 (MCF7, SKBR3, MDA-MB-231, MDA-MB-435, Hs578T 및 T47D)와 일반 유방 세포주인 MCF10A에서의 전체 세포 RNA (total cellular RNAs) 중 BC200 RNA 양을 Northern 분석을 통해 확인한 것을 나타내었다.
도 21은 MabBC200-A3에 의해 면역 침강된 면역침전물 내의 BC200 RNA를 Northern 분석을 통해 나타낸 것이다(MabN: 음성대조군).
도 22는 MabBC200-A와 FITC가 부착된 항 인간 IgG (anti-human IgG)를 세포에 처리한 후 흐름 세포 측정법(flow cytometry) 으로 분석한 결과를 나타낸 것이다.
도 23은 상기 도 17의 흐름 세포 측정법(flow cytometry)에 의한 형광 값 및 도 20의 Northern 분석 값의 비교 그래프를 나타낸 것이다. 흐름 세포 측정법은 MabN으로, Northern 분석은 5S로 보정하였으며 (normalized), 비교 값 (the relative signal)은 각 세포에 대한 비례 값으로 나타내었다 (arbitrary unit).
도 24는 MabBC200-A3로 처리된 세포 용해물 (lysate)을 면역 침강하여, 면역침강물 내의 BC200 RNA 양을 Northern 분석을 통해 나타낸 것이다.
도 25는 세포 면역침강 (cellular IP) 후의 Northern 분석 값과 도 22의 흐름 세포 측정 값의 비교 그래프를 나타낸 것이다.
도 26은 BC200 RNA의 특이한 구조적 모티프를 인식하는 인간 항-RNA 항체를 나타낸 것이다.
패닝 횟수 | 초기 파아지수 | 결합한 파아지수 |
1차 | 1.2 X 1013 | 6.1 X 106 |
2차 | 3.0 X 1013 | 9.9 X 106 |
3차 | 1.8 X 1013 | 9.7 X 107 |
4차 | 1.2 X 1013 | 2.2 X 108 |
MabBC200-A | MabBC200-B | |
해리상수 값 (Kd) (M) | 3.6 X 10-8 | 7.6 X 10-8 |
CDR1 | CDR2 | CDR3 | ||
MabBC200-A | 중쇄 가변 영역 | GYTLSAYY (서열번호 1) |
INPRGGRT (서열번호 2) |
CAARGSPRSRFYYGMGVW (서열번호 3) |
경쇄 가변 영역 | QSINNY (서열번호 4) |
ATS (서열번호 5) |
CQQSYSFPWTF (서열번호 6) |
|
MabBC200-A1 | 경쇄 가변 영역 | 상동 | 상동 | CQQGYSFPWTF (서열번호 7) |
MabBC200-A2 | 경쇄 가변 영역 | 상동 | 상동 | CQQAYSFPWTF (서열번호 8) |
MabBC200-A3 | 경쇄 가변 영역 | 상동 | 상동 | CQQCYSFPWTF (서열번호 9) |
MabBC200-A4 | 경쇄 가변 영역 | 상동 | 상동 | CQQVYSFPWTF (서열번호 10) |
RNA | Frequency | Sequence (5'?3') |
RNA(51-120) | - | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGUUCGAGACCUGCCUGGGCAAUAUAGCGAGACCCCGUUCUCCC |
Randomized RNA pool | - | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGNNNNNNACCUGCCUGGGCNNNNNAGCGAGACCCCGUUCUCCC |
S1 | 46 | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGUUCGAGACCUGCCUGGGCAAUAUAGCGAGACCCCGUUCUCCC |
S7 | 1 | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGCAAGCGACCUGCCUGGGCAGUAUAGCGAGACCCCGUUCUCCC |
S14 | 1 | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGUAUUCUACCUGCCUGGGCUAUCCAGCGAGACCCCGUUCUCCC |
S40 | 1 | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGUAUCGCACCUGCCUGGGCUAUAUAGCGAGACCCCGUUCUCCC |
S50 | 1 | GGGAGGCGGGAGGAUAGCUUGAGCCCAGGAGACACUUACCUGCCUGGGCUAAGCAGCGAGACCCCGUUCUCCC |
Claims (15)
- 서열번호 1의 아미노산 서열로 이루어지는 상보성결정영역 1 (CDR1),
서열번호 2의 아미노산 서열로 이루어지는 CDR2, 및
서열번호 3의 아미노산 서열로 이루어지는 CDR3을 포함하는 중쇄 가변영역(VH); 및,
서열번호 4의 아미노산 서열로 이루어지는 CDR1,
서열번호 5의 아미노산 서열로 이루어지는 CDR2 및
서열번호 6의 아미노산 서열 중 4번째 아미노산 세린(serine, S)이 다른 아미노산으로 치환된 서열로 이루어지는 CDR3을 포함하는 경쇄 가변영역(VL)을 포함하는, 항체 또는 이의 항원 결합 단편.
- 제1항에 있어서, 상기 경쇄 가변영역(VL)의 CDR3은 서열번호 6의 아미노산 서열 중 4번째 아미노산 세린(serine, S)이 글리신(Glycine, G), 알라닌(Alanine, A), 시스테인(Cysteine, C) 또는 발린(Valine, V)으로 치환된 서열로 이루어지는 것인, 항체 또는 이의 항원 결합 단편.
- 제1항에 있어서, 상기 경쇄 가변영역(VL)의 CDR3은 서열번호 7의 아미노산 서열로 이루어진 것인, 항체 또는 이의 항원 결합 단편.
- 제1항에 있어서, 상기 경쇄 가변영역(VL)의 CDR3은 서열번호 8의 아미노산 서열로 이루어진 것인, 항체 또는 이의 항원 결합 단편.
- 제1항에 있어서, 상기 경쇄 가변영역(VL)의 CDR3은 서열번호 9의 아미노산 서열로 이루어진 것인, 항체 또는 이의 항원 결합 단편.
- 제1항에 있어서, 상기 경쇄 가변영역(VL)의 CDR3은 서열번호 10의 아미노산 서열로 이루어진 것인, 항체 또는 이의 항원 결합 단편.
- 서열번호 13의 핵산서열로 이루어진 BC200(brain cytoplasmic 200) RNA의 50번 내지 120번 핵산 위치에 특이적으로 결합하는, 항체 또는 이의 항원 결합 단편으로서,
상기 항체는
랜덤 프라이머를 이용한 PCR 증폭 반응을 수행하여, 항체 유전자의 CDR 서열 내 특정 염기 위치에서 점 돌연변이를 포함하는 변이항체 유전자 풀(pool)을 2종 이상 제조하고, 상기 각각의 변이항체 유전자 풀은 점돌연벼이로 인한 변이 아미노산 위치가 상이한 것이며;
상기 변이항체 유전자 풀로부터 발현된 변이항체 풀과 서열번호 13의 염기서열로 이루어진 BC200 RNA를 반응시켜, 비변이 항체보다 결합력이 높은 변이항체 풀을 선별하는 상위 스크리닝 단계;
상기 선별된 변이항체 풀에 대응하는 단클론 항체 풀을 제작하는 단계; 및
상기 단클론 항체 풀 및 상기 BC200 RNA를 반응시켜 비변이 항체보다 결합력이 높은 단클론 항체를 선별하는 하위 스크리닝 단계를 포함하는,
항체 또는 이의 항원 결합 단편 선별 방법으로 얻어진 것인,
항체 또는 이의 항원 결합 단편.
- 제7항에 있어서, BC200(brain cytoplasmic 200) RNA 내의 서열번호 11 또는 서열번호 12 영역에 특이적으로 결합하는, 항체 또는 이의 항원 결합 단편.
- 서열번호 1의 아미노산 서열로 이루어지는 중쇄 상보성결정영역1(CDR1);
서열번호 2의 아미노산 서열로 이루어지는 중쇄 상보성결정영역2(CDR2);
서열번호 3의 아미노산 서열로 이루어지는 중쇄 상보성결정영역3(CDR3);
서열번호 4의 아미노산 서열로 이루어지는 경쇄 상보성결정영역1(CDR1);
서열번호 5의 아미노산 서열로 이루어지는 경쇄 상보성결정영역2(CDR2); 및
서열번호 6의 아미노산 서열 중 4번째 아미노산 세린(serine, S)이 다른 아미노산으로 치환된 서열로 이루어지는 경쇄 상보성결정영역3(CDR3)을 코딩하는 뉴클레오티드 서열; 또는 상기 뉴클레오티드 서열의 상보적 서열을 포함하는 핵산분자.
- 제1항의 항체 또는 이의 항원 결합 단편을 코딩하는 핵산분자.
- 제1항 내지 제8항 중 어느 한 항의 항체 또는 이의 항원 결합 단편을 포함하는 BC200 RNA 탐지용 조성물.
- 제1항 내지 제8항 중 어느 한 항의 항체 또는 이의 항원 결합 단편을 포함하는 BC200 RNA 탐지용 키트.
- 랜덤 프라이머를 이용한 PCR 증폭 반응을 수행하여, 항체 유전자의 CDR 서열 내 특정 염기 위치에서 점 돌연변이를 포함하는 변이항체 유전자 풀(pool)을 2종 이상 제조하고, 상기 각각의 변이항체 유전자 풀은 점돌연벼이로 인한 변이 아미노산 위치가 상이한 것이며;
상기 변이항체 유전자 풀로부터 발현된 변이항체 풀과 서열번호 13의 염기서열로 이루어진 BC200 RNA를 반응시켜, 비변이 항체보다 결합력이 높은 변이항체 풀을 선별하는 상위 스크리닝 단계;
상기 선별된 변이항체 풀에 대응하는 단클론 항체 풀을 제작하는 단계; 및
상기 단클론 항체 풀 및 상기 BC200 RNA를 반응시켜 비변이 항체보다 결합력이 높은 단클론 항체를 선별하는 하위 스크리닝 단계를 포함하는,
항체 또는 이의 항원 결합 단편 선별 방법으로서,
상기 선별된 항체 또는 이의 항원 결합 단편은 서열번호 13의 염기서열로 이루어진 BC200 RNA의 50번 내지 120번 염기서열에 특이적으로 결합하는 것인, 항체 또는 이의 항원 결합 단편 선별 방법.
- 제1항 내지 제8항 중 어느 한 항의 항체 또는 이의 항원 결합 단편을 포함하는, 유방암 진단용 조성물.
- 삭제
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US20150266975A1 (en) | 2015-09-24 |
KR20150108997A (ko) | 2015-10-01 |
US9512235B2 (en) | 2016-12-06 |
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