JP2018193347A - サイクリン依存性キナーゼ基質 - Google Patents
サイクリン依存性キナーゼ基質 Download PDFInfo
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- JP2018193347A JP2018193347A JP2017100193A JP2017100193A JP2018193347A JP 2018193347 A JP2018193347 A JP 2018193347A JP 2017100193 A JP2017100193 A JP 2017100193A JP 2017100193 A JP2017100193 A JP 2017100193A JP 2018193347 A JP2018193347 A JP 2018193347A
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- amino acid
- residue
- cyclin
- group
- dependent kinase
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Abstract
Description
項A. 式(1):R1−P(式中:R1はセリン残基又はトレオニン残基を示す。Pはプロリン残基を示す。−は単結合を示す。左側がN末端側を示す。)で表されるアミノ酸配列を含み、且つ下記(a1)及び/又は(b1):
(a1)前記式(1)中のプロリン残基からN末端側へ向けて数えて2番目のアミノ酸残基が芳香族アミノ酸残基であること、及び/又は
(b1)前記式(1)中のプロリン残基からC末端側の少なくとも2つのアミノ酸残基が酸性アミノ酸残基であること、
を満たすポリペプチドからなる、サイクリン依存性キナーゼ基質.
項B. 項Aに記載の基質を含有する、サイクリン依存性キナーゼ活性測定用試薬。
項C. 項Aに記載の基質を含む、サイクリン依存性キナーゼ活性測定用キット.
項D. 下記工程(i)及び(ii):
(i)被検試料と項Aに記載の基質とを接触させる工程、、及び
(ii)前記被検試料中のサイクリン依存性キナーゼによって生成された物質の量を測定する工程を含む、被検試料のサイクリン依存性キナーゼ活性を測定する方法.
項E. 項Aの基質の、サイクリン依存性キナーゼ活性測定用試薬の製造のための使用。
項F. サイクリン依存性キナーゼ活性測定用試薬としての使用のための、項Aの基質。
項G 項Aの基質の、サイクリン依存性キナーゼ活性測定のための使用。
本発明は、その一態様において、式(1):R1−P(式中:R1はセリン残基又はトレオニン残基を示す。Pはプロリン残基を示す。−は単結合を示す。左側がN末端側を示す。)で表されるアミノ酸配列を含み、且つ下記(a1)及び/又は(b1):
(a1)前記式(1)中のプロリン残基からN末端側へ向けて数えて2番目のアミノ酸残基が芳香族アミノ酸残基であること、及び/又は
(b1)前記式(1)中のプロリン残基からC末端側の少なくとも2つのアミノ酸残基が酸性アミノ酸残基であること、
を満たすポリペプチドからなる、サイクリン依存性キナーゼ基質(本明細書において、「本発明の基質」と示すこともある。)に関する。以下、これについて説明する。
(a2)式(1)中のプロリン残基からC末端側へ向けて数えて5番目のアミノ酸残基が塩基性アミノ酸残基であること、
(a3)式(1)中のプロリン残基からN末端側へ向けて数えて3番目のアミノ酸残基が環構造含有アミノ酸残基であること、
(a4)式(1)中のプロリン残基からC末端側へ向けて数えて6番目のアミノ酸残基がグリシン残基であること、
(a5)(a5A)式(1)中のプロリン残基からN末端側へ向けて数えて4番目のアミノ酸残基がアラニン残基であること、及び(a5B)式(1)中のプロリン残基からN末端側へ向けて数えて4番目のアミノ酸残基がメチオニン残基であること、のいずれかを満たすこと、
(a6)式(1)中のプロリン残基からC末端側へ向けて数えて2番目のアミノ酸残基がプロリン残基であること、
(a7)式(1)中のプロリン残基からC末端側へ向けて数えて3番目のアミノ酸残基がトリプトファン残基であること、
(a8)式(1)中のプロリン残基からC末端側へ向けて数えて1番目のアミノ酸残基がアスパラギン残基であること、
(a9)式(1)中のプロリン残基からC末端側へ向けて数えて4番目のアミノ酸残基がトリプトファン残基であること、及び
(a10)式(1)中のプロリン残基からN末端側へ向けて数えて5番目のアミノ酸残基がグリシン残基であること、
からなる群より選択される少なくとも1つの要件を満たすことが好ましい。
(b2)式(1)中のプロリン残基からC末端側へ向けて数えて1〜3番目のアミノ酸残基の少なくとも1つのアミノ酸残基が酸性アミノ酸残基であること、
(b3)式(1)中のプロリン残基からC末端側へ向けて数えて1〜10番目のアミノ酸残基の少なくとも2つのアミノ酸残基が酸性アミノ酸残基であること、
(b4)式(1)中のプロリン残基からC末端側へ向けて数えて1番目のアミノ酸残基が塩基性アミノ酸残基ではないこと、及び
(b5)式(1)中のプロリン残基からC末端側へ向けて数えて1〜5番目のアミノ酸残基の全てのアミノ酸残基が塩基性アミノ酸残基ではないこと
からなる群より選択される少なくとも1つの要件を満たすことが好ましい。
本発明は、その一態様において、下記工程(i)及び(ii):(i)被検試料と本発明の基質とを接触させる工程、及び(ii)前記被検試料中のサイクリン依存性キナーゼによって生成された物質の量を測定する工程を含む、被検試料のサイクリン依存性キナーゼ活性を測定する方法(本明細書において、「本発明の測定方法」と示すこともある。)に関する。以下、これについて説明する。
(iia)前記修飾された前記基質と、前記修飾された前記基質に対する結合性分子とを混合し、前記修飾された前記基質と前記結合性分子とを含む複合体を形成させる工程、及び
(iic)前記複合体の量を測定することによって、前記修飾された前記基質の量を測定する工程
を含む。
本発明は、その一態様において、本発明の基質を含有する、サイクリン依存性キナーゼ活性測定用試薬(本明細書において、「本発明の試薬」と示すこともある。)、及び本発明の基質を含む、サイクリン依存性キナーゼ活性測定用キット(本明細書において、「本発明のキット」を示すこともある。)に関する。以下、これについて説明する。
CDKの生体内基質であるRbタンパク質の部分ペプチド(比較ポリペプチド1)、CDK4及びCDK6に対して比較ポリペプチド1よりも高い反応性を示すポリペプチド(比較ポリペプチド2)、及びポリペプチド1を、Genscript社に委託して合成した。これらのポリペプチドのアミノ酸配列を表1に示す。なお、これらのポリペプチドは、N末端のアミノ酸残基が、リンカー(アミノヘキサン)を介してビオチン修飾されたものである。
CDK1、CDK2、CDK4及びCDK6に対する、製造例1で得られたポリペプチドの反応性を調べた。具体的には以下のようにして行った。
CDK4及びCDK6に対するポリペプチド1の反応性に重要なアミノ酸を調べるために、ポリペプチド1の各アミノ酸残基を別のアミノ酸残基に変異させた変異体(ポリペプチド2〜13)を、ユーロフィンジェノミクス社に委託して合成した。これらのポリペプチド及びポリペプチド1のアミノ酸配列を表4に示す(表4中、太字下線のアミノ酸残基はポリペプチド1から変異しているアミノ酸残基を示す。)。なお、これらのポリペプチドは、N末端のアミノ酸残基が、リンカー(アミノヘキサン)を介してビオチン修飾されたものである。
CDKとしてCDK4又はCDK6を用い、且つ基質ペプチドとして製造例2で得られたポリペプチド(ポリペプチド2〜13)又は比較ポリペプチド2を用いる以外は、試験例1と同様にして行った。下記V1〜V4:
V1:比較ポリペプチド2及びCDK4を用いた場合の発光強度、
V2:ポリペプチド2〜17及びA〜Eのいずれか及びCDK4を用いた場合の発光強度、
V3:比較ポリペプチド2及びCDK6を用いた場合の発光強度、及び
V4:ポリペプチド2〜17及びA〜Eのいずれか及びCDK6を用いた場合の発光強度
を測定して、式([(V2/V1)+(V4/V3)]/2)に基づいて、CDK4/6反応性を算出した。CDK4/6反応性は比較ポリペプチド2のCDK4/6反応性を1とした場合の相対値である。結果を表5(表5中、太字下線のアミノ酸残基はポリペプチド1から変異しているアミノ酸残基を示す。)に示す。表5には、試験例1の結果に基づいて算出された同平均値も載せた。
CDK4及びCDK6の基質として知られているポリペプチド(比較ポリペプチド2)、CDKの生体内基質であるRbタンパク質におけるCDK4リン酸化サイト及びCDK6リン酸化サイトを含む部位のポリペプチド(比較ポリペプチド3)、及び比較ポリペプチド3においてCDK4リン酸化サイトのアミノ酸残基をアラニン残基に置換してなるポリペプチド(比較ポリペプチド4)を、Genscript社合成サービスで合成した。これらのポリペプチドのアミノ酸配列を表6に示す。なお、これらのポリペプチドは、N末端のアミノ酸残基が、リンカー(アミノヘキサン)を介してビオチン修飾されたものである。また、比較ポリペプチド3及び4は、C末端のアミノ酸残基のカルボキシル基がアミド化して(即ち、末端の−COOHが−CO−NH2になって)いる。
CDK1、CDK2、CDK4及びCDK6に対する、製造例3で得られたポリペプチドの反応性を調べた。具体的には以下のようにして行った。
CDK4及びCDK6の基質として知られているポリペプチド(比較ポリペプチド2)、その他の比較ポリペプチド(比較ポリペプチド5〜7)と、これらの比較ポリペプチドのリン酸化サイト(SP又はTP)のプロリン残基からC末端側の2つのアミノ酸残基を酸性アミノ酸残基に置換してなるポリペプチド(ポリペプチド18〜26)を、ユーロフィンジェネティクス社合成サービスで合成した。これらのポリペプチドのアミノ酸配列を表8(表8中、太字下線のアミノ酸残基は、対応の比較ポリペプチドから変異しているアミノ酸残基を示し、Xはγ−カルボキシグルタミン酸を示す。)に示す。なお、これらのポリペプチドは、N末端のアミノ酸残基が、リンカー(アミノヘキサン)を介してビオチン修飾されたものである。
CDK1、CDK2、CDK4及びCDK6に対する、製造例4で得られたポリペプチドの反応性を調べた。具体的には以下のようにして行った。
試験例2においてCDK4及びCDK6に対する反応性が高いことが分かったポリペプチド(ポリペプチド3)に対して、試験例4で明らかとなったCDK4及びCDK6に対する特異性、特にCDK6に対する特異性に重要な変異(リン酸化サイト(SP又はTP)のプロリン残基からC末端側の少なくとも2つのアミノ酸残基の、酸性アミノ酸残基への変異)が導入されたポリペプチド(ポリペプチド27及び28)を、ユーロフィンジェノミクス社に委託して合成した。これらのポリペプチドのアミノ酸配列を表10(表10中、太字下線のアミノ酸残基は、ポリペプチド3から変異しているアミノ酸残基を示す。)に示す。なお、これらのポリペプチドは、N末端のアミノ酸残基が、リンカー(アミノヘキサン)を介してビオチン修飾されたものである。
CDK1、CDK2、CDK4及びCDK6に対する、製造例5で得られたポリペプチドの反応性を、試験例4と同様にして調べた。各CDKに対する反応性は、ポリペプチド3を用いた場合の反応性を100%とする、相対値として算出した。結果を表11に示す。
CDK1、CDK2、CDK4及びCDK6に対する、製造例5で得られたポリペプチド(ポリペプチド28)の反応性を、自動免疫測定装置(シスメックス社製、HISCL-800)を用いて調べた。具体的には以下のようにして行った。
Claims (18)
- 式(1):R1−P(式中:R1はセリン残基又はトレオニン残基を示す。Pはプロリン残基を示す。−は単結合を示す。左側がN末端側を示す。)で表されるアミノ酸配列を含み、且つ下記(a1)及び/又は(b1):
(a1)前記式(1)中のプロリン残基からN末端側へ向けて数えて2番目のアミノ酸残基が芳香族アミノ酸残基であること、及び/又は
(b1)前記式(1)中のプロリン残基からC末端側の少なくとも2つのアミノ酸残基が酸性アミノ酸残基であること、
を満たすポリペプチドからなる、サイクリン依存性キナーゼ基質。 - 下記(a2):
(a2)前記式(1)中のプロリン残基からC末端側へ向けて数えて5番目のアミノ酸残基が塩基性アミノ酸であること、
を満たす、請求項1に記載の基質。 - 下記(a3):
(a3)前記式(1)中のプロリン残基からN末端側へ向けて数えて3番目のアミノ酸残基が環構造含有アミノ酸残基であること、
を満たす、請求項1又は2に記載の基質。 - 下記(a3):
(a3)前記式(1)中のプロリン残基からN末端側へ向けて数えて3番目のアミノ酸残基がプロリン残基であること、
を満たす、請求項3に記載の基質。 - 下記(a5):
(a5)前記式(1)中のプロリン残基からN末端側へ向けて数えて4番目のアミノ酸残基がアラニン残基であること、
を満たす、請求項1〜4のいずれかに記載の基質。 - 下記(b2):
(b2)前記式(1)中のプロリン残基からC末端側へ向けて数えて1〜3番目のアミノ酸残基の少なくとも1つのアミノ酸残基が酸性アミノ酸残基であること、
を満たす、請求項1〜5のいずれかに記載の基質。 - 下記(b3):
(b3)前記式(1)中のプロリン残基からC末端側へ向けて数えて1〜10番目のアミノ酸残基の少なくとも2つのアミノ酸残基が酸性アミノ酸残基であること、
を満たす、請求項1〜6のいずれかに記載の基質。 - 前記(b3)における酸性アミノ酸残基の数が2〜5である、請求項7に記載の基質。
- 下記(b4):
(b4)前記式(1)中のプロリン残基からC末端側へ向けて数えて1番目のアミノ酸残基が塩基性アミノ酸残基ではないこと
を満たす、請求項1〜8のいずれかに記載の基質。 - 下記(b5):
(b5)前記式(1)中のプロリン残基からC末端側へ向けて数えて1〜5番目のアミノ酸残基の全てのアミノ酸残基が塩基性アミノ酸残基ではないこと
を満たす、請求項1〜9のいずれかに記載の基質。 - 前記サイクリン依存性キナーゼが、サイクリン依存性キナーゼ4及びサイクリン依存性キナーゼ6からなる群より選択される少なくとも1種である、請求項1〜10のいずれかに記載の基質。
- 前記ポリペプチドの構成するアミノ酸残基の数が50以下である、請求項1〜11のいずれかに記載の基質。
- 請求項1〜12のいずれかに記載の基質を含有する、サイクリン依存性キナーゼ活性測定用試薬。
- 請求項1〜12のいずれかに記載の基質を含む、サイクリン依存性キナーゼ活性測定用キット。
- 下記工程(i)及び(ii):
(i)被検試料と請求項1〜12のいずれかに記載の基質とを接触させる工程、及び
(ii)前記被検試料中のサイクリン依存性キナーゼによって生成された物質の量を測定する工程
を含む、被検試料のサイクリン依存性キナーゼ活性を測定する方法。 - 前記生成された物質が、修飾された前記基質であり、
前記工程(ii)が、下記工程(iia)及び(iic):
(iia)前記修飾された前記基質と、前記修飾された前記基質に対する結合性分子とを混合し、前記修飾された前記基質と前記結合性分子とを含む複合体を形成させる工程、及び
(iic)前記複合体の量を測定することによって、前記修飾された前記基質の量を測定する工程
を含む、請求項15に記載の方法。 - 前記工程(iia)において、前記複合体が、固相担体上に形成される、請求項16に記載の方法。
- 前記工程(iia)において、前記複合体の形成が溶液中で行われ、且つ
前記工程(iia)及び(iic)の間に、(iib)前記複合体が形成された固相担体と、前記溶液とを分離する工程
をさらに含む、請求項17に記載の方法。
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