JP4808756B2 - タンパク質結合部位の同定 - Google Patents
タンパク質結合部位の同定 Download PDFInfo
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- JP4808756B2 JP4808756B2 JP2008244881A JP2008244881A JP4808756B2 JP 4808756 B2 JP4808756 B2 JP 4808756B2 JP 2008244881 A JP2008244881 A JP 2008244881A JP 2008244881 A JP2008244881 A JP 2008244881A JP 4808756 B2 JP4808756 B2 JP 4808756B2
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- C—CHEMISTRY; METALLURGY
- C40—COMBINATORIAL TECHNOLOGY
- C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
- C40B30/00—Methods of screening libraries
- C40B30/04—Methods of screening libraries by measuring the ability to specifically bind a target molecule, e.g. antibody-antigen binding, receptor-ligand binding
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/04—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers
- C07K1/047—Simultaneous synthesis of different peptide species; Peptide libraries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6845—Methods of identifying protein-protein interactions in protein mixtures
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Description
Ligation), Science 266 (1994) 766-779)、Tam(J.P.Tam et al., 直交結合法による保護されないペプチドを用いたペプチド合成(Peptide Synthesis using Unprotected Peptides through Orthogonal Coupling Methods), Proc. Natl. Acad. Sci. USA 92 (1995) 12485-12489; C.F.Liu et al., HIV−1プロテアーゼ構造類似体の合成のための偽プロリン形成による保護されないペプチドの直交連結(Or thogonal Ligation of
Unprotected Peptide through Pseudoproline Formation for the Synthesis
of HIV-1 Protease Analogs), J.Am.Chem.Soc. 188 (1996) 307-312; L.Zhang & J.P.Tam、合成ペプチドおよびタンパク質のための一般的かつ部位特異的な複合方法としてのチアゾリドン形成(Thiazolidone Formation as a General and Site-specific Conjugation Method for Synthetic Peptides and Proteins), Analytical Biochemistry 233 (1996) 87-93)、およびMutter(G.Tuchscherer & M.Mutter, ペプチド化学者への挑戦としてのタンパク質設計(Protein Design as a Challenge for Peptide Chemists), J.Peptide Science 1 (1995) 3-10; S.E.Cervigni et al., テンプレートに援助されたタンパク質設計:化学選択的連結反応によるキメラTASP(Template-assisted Protein Design: Chimeric TASP by Chemoselective Ligation), Peptide: Chemistry, Structure and Biology, P.T.P Kaumaya & R.S. Hodges eds, Mayflower (1996) 555-557)のグループによって発表された。
Conjugation and Cross-Linking), CRC Press Inc, Boca Raton, Florida USA 1991)。この構成において、セグメントにおける反応性群は、二官能連結物質の一部と反応するために用いられ、したがって、この連結物質の第2の部分が、固相からの反応性群と反応することを容易にし、またはこの逆も同様である。たとえば、MBS(m−マレインイミドベンゾ酸N−ヒドロキシスクシンイミドエステル)のようなリンカーは、活性のあるエステル(スクシンイミド)を介して1つのセグメントのアミノ基と、およびマレインイミド基を介して固相からの遊離チオール基と、またはこの逆と反応するために用いられる。このような方法において、連結時に好ましくは他の遊離アミノ基または遊離チオール基もセグメント中に存在してはならない。これを達成するために、この反応に関係するべきアミノ基またはチオール基は、たとえば1%のトリフルオト酢酸のような低刺激性の試薬によって開裂され得る側鎖保護基を用いることによって、選択的に脱保護されることができ、この試薬はその他の側鎖保護基を無傷のままにする。
を参照。)。たとえば、この基は、リシンの側鎖アミノ基におけるマレインイミド基とすることができる。このペプチド合成の終期に、この基は固相のチオール基と迅速かつ選択的に反応するであろう。Tamら(PNAS 92:12485-12489, 1995)は、保護されたセリン残基によって側鎖において修飾されたリシン残基とのペプチドの合成を述べた。過ヨウ化酸塩を用いた脱保護および選択的酸化後、セリンのαアミノ、βヒドロキシ官能基は、別のチオール担持表面に選択的に連結され得るアルデヒド官能基に変換される。また、ペプチドバックボーン連結は、ペプチドのアミノ基に付着した基を介して、セグメントをスポットするために用いられ得る(Bitan et al., J.Chem. Soc. Perkin Trans.1:1501-1510, 1997; Bitan and Gilon, Tetrahedon, 51:10513-10522, 1995; Kaljuste and Unden, Int. J.Pept. Prot. Res. 43:505-511, 1994)。
ポリプロピレンもしくはポリエチレン、またはその他の適した材料の支持体を、たとえばポリアクリル酸と移植した。例として、CuSO4を含有する6%のアクリル酸水溶液中のポリプロピレン支持体を、12kGyの照射量でガンマ放射線で照射した。カルボン酸基を含有するこの移植された固体支持体を、N−ヒドロキシベンゾトリアゾール(HOBt)とともにジシクロヘキシルカルボジイミド(DCC)を用いるt−ブチルオキシカルボニル−ヘキサメチレンジアミン(Boc−HMDA)の結合と、その後のトリフルオロ酢酸を用いるこのBoc基の開裂とを介して、アミノ基と官能化した。その後、この表面を、標準Fmoc化学反応を用いて、Cysアミノ酸(好適には種々に保護されたCysの混合)と官能化する。
Mikrodosier Systeme GmbH.))を用いて、圧電性ドロップオンデマンド技術を用いてスポットした。代替的に、スポッティングまたはグリッディングを、小型電磁弁(INKX0502600A;the Ice Company)、または硬化された精密なグラウンドグリッディングピン(ground gridding pin)(ジェノミックソリューションズ社(Genomic Solutions)、直径0.4、0.6、0.8または1.5mm)を用いて行った。
タンパク質およびペプチドは結合分子のいずれのタイプ、たとえば、抗体、Fc−尾部または検出タグを含有する可溶性レセプタ、ビオチン化分子または蛍光分子のような生体分子を用いて、スクリーニングされ得る。代替のセグメントとしては、たとえば炭水化物、非自然アミノ酸、PNA、DNA、脂質、ペプチド結合模倣を含有する分子になり得る。
TSHまたはTSHRのような大きいタンパク質の不連続結合部位の合成模倣の設計および合成が目下望まれる。このような目的で、タンパク質のテンプレート基礎模倣は基本研究のための強力な新しいツールを提供した。ここに提供される技術は、不連続結合部位のマッピング、合成テンプレートにこれらを結合すること、および構造的かつ機能的特徴を詳細に観測することを可能にする。
使用例
ヒト腫瘍壊死因子(hTNF)における不連続エピトープのマッピング(図10〜15)
hTNFに対するモノクローナル抗体mAb−210を、線状およびループペプチドにおいて検定した(mAb−210はR&Dシステムズ社(R&D Systems)から購入した。MAB210、クローン1825.12、ITKダイアグノスティックスオイトホルン(ITK Diagnostics Uithoorn)、オランダ)。第一に、これを、hTNFを覆う全体重複線状12merにおいて、ペプスキャンで検定した。これは、配列IKSPCQRETPEGの周りでより低いピークを生じさせた(図10)。第二に、これを、二重15merループ・ループペプチドにおいてペプスキャンマトリクススキャンで検定した(図3および図4において記載され、かつ図11〜12を通じて説明される。)。2つのループ領域を区別した。ペプチド配列GQGCPSTHVLLT(スクエア65から67)およびSAIKSPCQRE(スクエア92から96)(図13,14)。さらに、様々なスクエアにおいて、ループペプチドスポットを、配列GQGCPSTHVLLT(スポット65−67)、SAIKSPCQRE(スポット92−96)およびKGDRLSAEINR(スポット126−129)に対応して同定した(図14)。hTNFの三次元モデルにおける図15に表されたこれらの3つの領域は、hTNF分子の片側に位置し、かつ1つの大きい不連続エピトープ領域を形成する。
6つの異なる抗体から、HCDR3領域(3つの抗体重鎖の相補性決定領域)を合成ループペプチドとして合成した。例として、4つの異なる抗リゾチーム抗体および2つの異なる抗絨毛性ゴナドトロピン抗体を選択し、1fdl.pdb(D1.3),1mlb.pdb(D44.1),3hfl.pdb(HyHel−5),3hfm.pdb(HyHel−10)は全て抗リゾチーム、および1qfw.pdb、ならびに2つの抗ヒト絨毛性ゴナドトロピンは、1つは抗α、および1つは抗βである。これらの合成ループペプチドを、上述したようなミニカードに結合した。これらの3次元コーディネイト(pdbファイル)は、www.rcsb.org(RCSB,Research Collaboratory for
Structural Bioinformatics)におけるタンパク質データバンク(Protein Data Bank)(PDB)から引用された(Berman et al., 2000, The Protein Data Bank. Nucleic
Acids Research, 28pp.235-242; Bernstein et al., 1977, The protein data bank, 高分子構造に関するコンピュータを利用した永久保存用ファイル(A computer-based
archival file for macromolecular structures) J. Mol. Biol. 112:535-542)。
不連続エピトープの2つの個別部分を構成する2個のペプチドを、図12の凡例において上述されたミニカードの表面に結合した(図3Aおよび図4(例4)参照)。cys(mmt)を、単独で、またはcys(trt)および/もしくはval(mmt)(cysおよびvalは1:1、1:3または1:9などの割合)と組合せて結合した。この方法で、1個のペプチドを結合し(配列AおよびC)、またはシステイン間でバリンを増加した2個のペプチドを結合した(配列BおよびD)(図4B(例4),図17参照)。これらの4つの構成を、2つの異なる抗体とともにインキュベーションした。
(1)結合部位の同定または検出のための分子ライブラリの作成方法であって、ライブラリに複数の検定物を備えることを含み、さらにまた、固相において少なくとも第1のセグメントを極めて近接して第2のセグメントにスポットすることによって、検定物のうちの少なくとも1つを産生することをさらに含むことを特徴とする方法。
最も高い結合活性を有するループ・ループペプチドペア、+LHGNYDFDGZ+SESVDSYGNSFMQZ(3hfl.pdbのHCDR3のループおよび1qfw.pdbのLCDR1のループ)を矢印で示している。
Claims (18)
- 結合部位の同定または検出のための分子ライブラリの作成方法であって、ライブラリに複数の検定物を備えることを含み、さらにまた、少なくとも第1のセグメントと第2のセグメントとを相互に100オングストロームしか離れずに近接させて固相にスポットすることによって、検定物のうちの少なくとも1つを産生することをさらに含み、
推定結合分子が少なくとも2つの近接させてスポットされたセグメントまたはその部分に結合し得、
セグメント間の距離は可変であることを特徴とする方法。 - 固相はアレイ表面を含むことを特徴とする請求項1記載の方法。
- セグメントのうち少なくとも1つはペプチドを含むことを特徴とする請求項1または2に記載の方法。
- 各セグメントはペプチドを含むことを特徴とする請求項1〜3のいずれかに記載の方法。
- 少なくとも第1のセグメントは、固相に対してチオエーテル結合によって連結されることを特徴とする請求項1〜4のいずれかに記載の方法。
- 少なくとも第1および/または第2のセグメントまたはその部分はそれぞれ、不連続結合部位の潜在的部分を表すことを特徴とする請求項1〜5のいずれかに記載の方法。
- 請求項1〜6のいずれかに記載の方法によって取得可能な少なくとも第1および第2のセグメントを含む複数の検定物を含むことを特徴とするライブラリ。
- 検定物は、位置的に、または空間的にアドレス可能であることを特徴とする請求項7記載のライブラリ。
- 少なくとも第1および/または第2のセグメントまたはその部分はそれぞれ、不連続結合部位の潜在的部分を表すことを特徴とする請求項7または8に記載のライブラリ。
- 請求項7〜9のいずれかに記載のライブラリを含むことを特徴とする固体支持体。
- 結合分子と相互作用することができる結合部位のスクリーニング方法であって、少なくとも1つの潜在的結合分子によって請求項7〜9のいずれかに記載のライブラリをスクリーニングすることと、このライブラリの検定物とこの潜在的結合分子との間の結合を検出することとを含むことを特徴とする方法。
- 結合部位は不連続結合部位であることを特徴とする請求項11記載の方法。
- 結合部位を含む合成分子を同定または取得するための、請求項11または12に記載の方法。
- 結合部位に結合することができる結合分子を同定または取得するための、請求項11または12に記載の方法。
- 結合部位を含む合成分子を同定または取得するための、請求項7〜9のいずれかに記載のライブラリの使用。
- 結合部位を含む合成分子を同定または取得するための、請求項10記載の固体支持体の使用。
- 結合部位に結合することができる結合分子を同定または取得するための、請求項7〜9のいずれかに記載のライブラリの使用。
- 結合部位に結合することができる結合分子を同定または取得するための、請求項10記載の固体支持体の使用。
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JP4808756B2 true JP4808756B2 (ja) | 2011-11-02 |
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EP (2) | EP1197755A1 (ja) |
JP (2) | JP2004511780A (ja) |
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AU (2) | AU2002211099B2 (ja) |
CA (1) | CA2424611C (ja) |
CY (1) | CY1110101T1 (ja) |
DE (1) | DE60136202D1 (ja) |
DK (1) | DK1325340T3 (ja) |
ES (1) | ES2317941T3 (ja) |
IL (2) | IL155277A0 (ja) |
NZ (1) | NZ524874A (ja) |
PT (1) | PT1325340E (ja) |
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- 2001-10-10 ES ES01979110T patent/ES2317941T3/es not_active Expired - Lifetime
- 2001-10-10 DK DK01979110T patent/DK1325340T3/da active
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DE60136202D1 (de) | 2008-11-27 |
CA2424611A1 (en) | 2002-04-18 |
PT1325340E (pt) | 2009-01-07 |
CA2424611C (en) | 2011-01-25 |
NZ524874A (en) | 2004-09-24 |
EP1325340A1 (en) | 2003-07-09 |
EP1197755A1 (en) | 2002-04-17 |
JP2004511780A (ja) | 2004-04-15 |
JP2009058517A (ja) | 2009-03-19 |
WO2002031510A1 (en) | 2002-04-18 |
AU1109902A (en) | 2002-04-22 |
CY1110101T1 (el) | 2015-01-14 |
IL155277A0 (en) | 2003-11-23 |
US7972993B2 (en) | 2011-07-05 |
US20120190564A1 (en) | 2012-07-26 |
IL155277A (en) | 2011-07-31 |
DK1325340T3 (da) | 2009-02-16 |
AU2002211099B2 (en) | 2007-01-11 |
US20030228605A1 (en) | 2003-12-11 |
ATE411526T1 (de) | 2008-10-15 |
ES2317941T3 (es) | 2009-05-01 |
EP1325340B1 (en) | 2008-10-15 |
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