JP2010510812A - 細胞イメージング法に基づく、hbvカプシドタンパク質と表面タンパク質との間の相互作用を用いたhbv増殖抑制物質のスクリーニング方法 - Google Patents
細胞イメージング法に基づく、hbvカプシドタンパク質と表面タンパク質との間の相互作用を用いたhbv増殖抑制物質のスクリーニング方法 Download PDFInfo
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Abstract
Description
前記動物細胞は、HEK293T、COS7、HeLaおよびCHOなどを例示することができるが、これらに制限されず、本発明の好ましい態様では、HEK293T細胞を使用した。
但し、下記の実施例は、本発明を例示するだけのものであって、本発明の内容が下記実施例に限定されるものではない。
<1−1>pCapsid−GFP遺伝子の製造
HBVカプシドタンパク質の中でpro配列を除外したドメイン(アミノ酸30−214)(配列番号19)を含むpHBcAg(Choi KJ等,Biochem Biophys Res Commun,2004年,第319巻,959−66頁)を鋳型にして、配列番号7と配列番号8のプライマー対を使用してDNA重合連鎖反応法(PCR)で、95℃、1分;55℃、30秒;72℃、1分の条件で25回反復して合成した後、SalIとKpnIのDNA制限酵素で切断した後、同じ制限酵素で切断したpEGFP−N1(Clontech)ベクターに、T4 DNAリガーゼを使用して挿入して、カプシド−GFPが含まれたプラスミドであるpCapsid−GFPを製造した。このDNAを鋳型に、配列番号9と配列番号10のプライマー対を使用してDNA重合連鎖反応法でNotIとXhoIのDNA制限酵素を含んだカプシド−GFP DNA断片を作った。合成されたカプシド−GFPとpBud−CE4.1(Stratagene,米国)をNotIとXhoIのDNA制限酵素で切断した後、T4 DNAリガーゼを使用して連結してpHBc−GFP(図2b)を製造し、DNA塩基配列を分析して配列番号4で表されるアミノ酸を暗号化する配列番号3のカプシド−GFP DNAが適切に挿入されたことを確認した。
マウスcDNAを鋳型に、配列番号11と配列番号12のプライマー対を使用してPLC−δ(phospholipase C delta)のPHドメイン(Genebank ID:241276,アミノ酸2−175)をDNA重合連鎖反応法(PCR)で、95℃、1分;55℃、30秒;72℃、1分の条件で25回反復して合成した。pTrx−PreS(Choi KJ等,Biochem Biophys Res Commun,2004年,第319巻,959−66頁)を鋳型に、配列番号13と配列番号14のプライマー対を使用してHBV表面タンパク質の中でPreSドメイン(アミノ酸1−163)(配列番号20)を有するDNAをDNA重合連鎖反応法(PCR)で、95℃、1分;55℃、30秒;72℃、1分の条件で25回反復して合成した。前記方法で得たPreSをコードするDNAとPHをコードするDNAを鋳型に、配列番号15と配列番号16のプライマー対を使用してDNA重合連鎖反応法(PCR)で、95℃、1分;55℃、30秒;72℃、1分の条件で25回反復してPreS−PH DNAを合成した。ここで、前記二つの鋳型DNAがオーバーラップしてPCRが遂行された。増幅されたDNAをHindIIIとXbaIのDNA制限酵素で切断した後、同じ制限酵素で切断したpHBc−GFPにT4 DNAリガーゼを使用して連結して、配列番号2で表されるアミノ酸を暗号化する配列番号1の塩基配列を有するDNAを含むpHBsPH−HBcGFP(図2b)を製造し、DNA塩基配列を分析して増幅されたDNAが適切に挿入されたことを確認した。
<2−1>動物細胞の培養
HEK293T細胞は、5%CO2と37℃の条件下で、10%FBSが供給されたDMEM(Dulbecco’s modified Eagle’s medium;Gibco,米国)で培養した。細胞は、90%の密度で継代培養して、25%密度を維持しながら形質転換のために準備した。
実施例2−1の方法で培養されたHEK293T細胞を継代培養して、カバーガラスが入っている6ウェルプレートで培養した。密度条件が40〜60%になるように育てた後、リポフェクタミン(Invitrogen,米国)とPLUS試薬(Invitrogen,米国)を使用して、pHBc−GFP、pHBsPH−HBcGFPまたはpΔHBsPH−HBcGFPを前記動物細胞に感染させた。前記形質導入した細胞を48時間培養してタンパク質を生成するようにした。
PreS由来のペプチド(ΔL4bペプチド;配列番号21:RQPTPISPPLRDSHPQAMQWNS;ペブトロン、韓国)が、PreSタンパク質とカプシドタンパク質の相互作用を抑制できることを確認した。
<4−1>相互結合の測定
pHBc−GFP、pHBsPH−HBcGFPまたはpΔHBsPH−HBcGFPで形質導入されたHEK293T細胞が育ったプレートからカバーガラスを回収して、氷冷したPBSで洗浄した後、顕微鏡観察のためのスライドガラスに付けた。蛍光顕微鏡を使用してGFPを観察することができる490±20/528±38nm(励起/放射)波長のフィルターを通じて細胞を観察した。
pHBc−GFP、pHBsPH−HBcGFPまたはpΔHBsPH−HBcGFPで形質導入したHEK293T細胞の培養期間の間、PreSとカプシド間の相互作用を抑制するPreS由来のペプチド(ΔL4bペプチド;配列番号21)を50μMの濃度で一日の間、60%癒着細胞に処理した。形質導入したHEK293T細胞が育ったプレートからカバーガラスを回収して、氷冷したPBSで洗浄した後、顕微鏡観察のためのスライドガラスに付けた。蛍光顕微鏡を使用して、GFPを観察することができる490±20/528±38nm(励起/放射)波長のフィルターを通じて細胞を観察した。
Claims (13)
- HBVのカプシドタンパク質ドメインに蛍光タンパク質が連結された融合タンパク質をコードするポリヌクレオチドおよびHBVの表面タンパク質のPreSドメインに細胞膜標的化機能を遂行することができるタンパク質ドメインが連結された融合タンパク質をコードするポリヌクレオチドを含む発現ベクター。
- 前記HBVのカプシドタンパク質ドメインが、配列番号19のアミノ酸配列のHBVのカプシドタンパク質の中でpro配列を除外したドメイン(アミノ酸30−214)であることを特徴とする、請求項1に記載の発現ベクター。
- 前記蛍光タンパク質が、緑色蛍光タンパク質(GFP)、赤色蛍光タンパク質(RFP)、青色蛍光タンパク質(BFP)、黄色蛍光タンパク質(YFP)、シアン蛍光タンパク質(CFP)および強化された緑色蛍光タンパク質(EGFP)からなる群から選択されるいずれか1つであることを特徴とする、請求項1に記載の発現ベクター。
- 前記HBVの表面タンパク質のPreSドメインが、配列番号20のアミノ酸配列を有することを特徴とする、請求項1に記載の発現ベクター。
- 前記HBVの表面タンパク質のPreSドメインが、配列番号20のアミノ酸の93番アミノ酸〜117番アミノ酸が欠失したドメインであることを特徴とする、請求項1に記載の発現ベクター。
- 前記細胞膜標的化機能を遂行することができるタンパク質ドメインが、PLC−δ(phospholipase C delta)のPH(Pleckstrin homology)ドメイン(Genebank ID:241276、アミノ酸2−175)、EEA1(early endosome antigene1)のFYVE(No full name)ドメイン(Genebank ID:L40157、アミノ酸1352−1410)、ING2(Inhibitor of growth2)のPHD(Prolyl−hydroxylase)ドメイン(Genebank ID:NM_001564、アミノ酸212−261)、タンパク質キナーゼCのC2(calcium/lipid−binding)ドメイン(Genebank ID:NM002737、アミノ酸172−260)およびグアニンヌクレオチド交換因子DBS(Guanine nucleotide exchange factor DBS)のSEC14(S.cerevisiae phosphatidylinositol transfer protein homology)ドメイン(Genenbank ID:AB_116074、アミノ酸90−236)からなる群から選択されたいずれかひとつであることを特徴とする、請求項1に記載の発現ベクター。
- 前記HBVのカプシドタンパク質ドメインに蛍光タンパク質が連結された融合タンパク質が、配列番号4で表されるアミノ酸配列を有することを特徴とする、請求項1に記載の発現ベクター。
- 前記HBVの表面タンパク質のPreSドメインに細胞膜標的化機能を遂行することができるタンパク質ドメインが連結された融合タンパク質が、配列番号2で表されるアミノ酸配列を有することを特徴とする、請求項1に記載の発現ベクター。
- 前記HBVの表面タンパク質のPreSドメインに細胞膜標的化機能を遂行することができるタンパク質ドメインが連結された融合タンパク質が、配列番号6で表されるアミノ酸配列を有することを特徴とする、請求項1に記載の発現ベクター。
- 請求項1ないし請求項9のいずれか一項の発現ベクターまたはHBVの表面タンパク質のPreSドメインに細胞膜標的化機能を遂行することができるタンパク質ドメインが連結された融合タンパク質をコードするポリヌクレオチドを含む第1発現ベクター、および前記融合タンパク質と相互作用するHBVのカプシドタンパク質ドメインに蛍光タンパク質が連結された融合タンパク質をコードするポリヌクレオチドを含む第2発現ベクターが共に形質導入された動物細胞。
- 前記動物細胞が、HHEK293T、COS7、HeLaおよびCHO細胞からなる群から選択されたいずれかひとつであることを特徴とする、請求項10に記載の動物細胞。
- 1)請求項10または請求項11の形質導入された動物細胞を培養しながら候補物質を処理する工程と、
2)蛍光顕微鏡を使用して、工程1)で発現された蛍光タンパク質の蛍光イメージを撮影する工程、および、
3)蛍光イメージが細胞質に位置するようにする候補物質を選別する工程とを含むHBVの増殖を抑制する物質をスクリーニングする方法。 - 請求項10または請求項11の動物細胞を含むHBV増殖を抑制する物質のスクリーニングキット。
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| KR1020070119060A KR100949310B1 (ko) | 2007-11-21 | 2007-11-21 | 세포 영상 기법을 이용한 hbv 캡시드 단백질과 표면단백질 간 상호작용 측정 방법과 이를 이용한 hbv 증식억제물질의 검색방법 |
| PCT/KR2008/006893 WO2009066964A1 (en) | 2007-11-21 | 2008-11-21 | Method for screening an inhibitory agent of hbv proliferation by using the interaction between hbv capsid and surface proteins based on cellular imaging |
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| CN101876658B (zh) * | 2009-11-25 | 2013-08-28 | 华中科技大学 | 一种具有多价效应和纳米尺寸效应的多肽荧光探针的构建方法及其应用 |
| WO2017015545A1 (en) | 2015-07-22 | 2017-01-26 | President And Fellows Of Harvard College | Evolution of site-specific recombinases |
| WO2017210181A1 (en) * | 2016-05-30 | 2017-12-07 | Geovax Inc. | Compositions and methods for generating an immune response to hepatitis b virus |
| WO2019040935A1 (en) | 2017-08-25 | 2019-02-28 | President And Fellows Of Harvard College | EVOLUTION OF PEPTIDASES BONT |
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| EP3942043A2 (en) | 2019-03-19 | 2022-01-26 | The Broad Institute, Inc. | Methods and compositions for editing nucleotide sequences |
| WO2022133266A1 (en) * | 2020-12-18 | 2022-06-23 | The Broad Institute, Inc. | Evolution of botulinum neurotoxin proteases |
| CN113686829B (zh) * | 2021-09-13 | 2022-06-07 | 徐州医科大学 | 一种检测细胞rna表达的方法 |
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