JP4109621B2 - リン酸モノエステル化合物の分子量を求める方法、およびマススペクトル測定用添加剤 - Google Patents
リン酸モノエステル化合物の分子量を求める方法、およびマススペクトル測定用添加剤 Download PDFInfo
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Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Description
ヤシロ・モリオ,他2名,「Preparation and Study of Dinuclear Zinc(II) Complex for the Efficient Hydrolysis of the Phosphodiester Linkage in a Diribonucleotide」,ジャーナル・オブ・ザ・ケミカル・ソサエティ・ケミカル・コミュニケーションズ(Journal of the Chemical society, Chemical communications),p.1793−1794(1995年) ヒデカズ・アリイ,他6名,「A novel diiron complex as a functional model for hemerythrin」,ジャーナル・オブ・インオーガニック・バイオケミストリー(Journal of Inorganic Biochemistry),第82巻,p.153−162(2000年)
(1) 単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物と被検試料とを溶媒中で混合して溶液とした後、当該溶液についてマススペクトル測定を行なう工程、
(2) 上記同位体とは異なる単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物と被検試料とを溶媒中で混合して溶液とした後、当該溶液についてマススペクトル測定を行なう工程、
(3) 上記マススペクトル測定結果を比較することによって、リン酸モノエステル化合物の分子量を求める工程、
を含むことを特徴とする。
上記錯体化合物としては、R1〜R4が全て水素原子であるものが好適である。やはり、構造が最も単純であり製造し易いこと等による。
[スキーム1]
上記スキーム1においては、化合物(II)に単一の亜鉛同位体化合物を反応させることによって、式(I)の化合物を合成する。原料化合物である化合物(II)は後述のスキーム2によって合成でき、単一の亜鉛同位体化合物としては、金属亜鉛や酸化亜鉛,亜鉛塩などを用いる。尚、化合物(II)は塩であってもかまわない。
[スキーム2]
スキーム2は、原料化合物である化合物(III)(1,3-ジアミノ-2-プロパノール)へ、R1〜R4を有する2-ピリジルメチル基を順次導入していく反応経路である。スキーム2で使用される化合物(III)は、市販のものを使用することができる。また、化合物(IV)やその他の2-ホルミルピリジン化合物は比較的簡単な構造を有しているので、市販のものを用いるか、或いは当業者公知の方法により合成することができる。また、置換基(R1〜R4)が反応性基である場合には、当該置換基を一般的な保護基で保護してもよく、当該保護基は適宜除去すればよい。
TPAHP(4.39mmol)のエタノール溶液(100ml)に10M 水酸化ナトリウム水溶液(1.0eq)を加え、次いで酢酸亜鉛(9.66mmol,2.2eq)を加えた。溶媒を減圧留去し、褐色オイル状残渣を得た。この残渣に水10mlを加えて溶解し、1.0M 過塩素酸ナトリウム水溶液(3.0eq)を加熱しながら滴下したところ、乳白色の結晶が析出した。これを濾取し、加熱乾燥して微黄褐色で粉末状の目的物2.99g(79%)を得た。目的物であることは、1H-NMR(400MHz)と13C-NMR(100MHz)、IR分析により確認した。
1H-NMR (DMSO-D6, 400MHz) : δ 2.04(2H, dd, J=12.1 and 12.4Hz, HC-1,3), 2.53(3H, s, HC-35), 3.06(2H, dd, J=12.1 and 12.3Hz, HC-1,3), 3.74(1H, t, J=10.4Hz, HC-2), 4.02-4.34(82H, m, HC-5,13,20,27), 7.54-7.65(8H, m, HC-10,11,18,19,25,26,32,33), 8.06-8.12(4H, m, HC-9,17,24,31), 8.58(4H, dd, J=16.3 and 16.5Hz, HC-8,16,23,30)
13C-NMR (DMSO-D6, 100MHz) : δ 58.0, 60.1, 62.0, 64.6, 122.7, 124.3, 124.4, 139.9, 140.4, 147.0, 147.2, 154.7, 155.1
IR (cm-1) : νas (COO) 1556, ν3(ClO4) 1090。
上記製造例1−1〜1−3で製造した亜鉛錯体化合物(64Zn,68Znおよび天然同位体Znを構成成分とする)それぞれを蒸留水に溶解し、1mM水溶液とした。被検試料として、P60c−srcペプチド 521−533 リン酸化型の1mM水溶液を用いた。尚、当該リン酸化ペプチドの構造は、以下の通りである。
マトリックス:THAP(2,4,6-トリヒドロキシアセトフェノン)40mg/ml(in アセトニトリル)
緩衝液(試料溶解用):10mM Tris-borate buffer(pH=8.0)。
上記製造例1−1,1−2で製造した亜鉛錯体(64Znおよび68Znを構成成分とする)を用いて、上記試験例1と同様の方法でマススペクトル測定を行なった。但し、被検試料として、下に構造を示すP60c−srcペプチド Substrate II リン酸化型を、測定機器としてVoyager RP型(PE Biosystem社)を用いた。
Claims (7)
- リン酸モノエステル化合物の分子量を求める方法であって、
(1) 単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物と被検試料とを溶媒中で混合して溶液とした後、当該溶液についてマススペクトル測定を行なう工程、
(2) 上記同位体とは異なる単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物と被検試料とを溶媒中で混合して溶液とした後、当該溶液についてマススペクトル測定を行なう工程、
(3) 上記マススペクトル測定結果を比較することによって、リン酸モノエステル化合物の分子量を求める工程、
を含むことを特徴とする方法。 - 請求項1に記載の方法において、上記錯体化合物としてR1〜R4が全て水素原子であるものを使用する方法。
- リン酸モノエステル化合物の分子量を求めるために使用されるマススペクトル測定用添加剤であって、単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物を含有する試薬、および上記同位体とは異なる単一の亜鉛同位体により構成されており且つ式(I)で表わされる化合物を含む錯体化合物を含有する試薬を含むことを特徴とするマススペクトル測定用添加剤。
- 上記錯体化合物としてR1〜R4が全て水素原子であるものを含有する試薬を含む請求項3に記載のマススペクトル測定用添加剤。
- 上記錯体化合物が、式(I)で表わされる化合物と酢酸イオンとで更に錯体を形成しているものである請求項3または4に記載のマススペクトル測定用添加剤。
- 上記試薬が塩の状態にある請求項3〜5のいずれかに記載のマススペクトル測定用添加剤。
- 上記試薬が溶液の状態にある請求項3〜5のいずれかに記載のマススペクトル測定用添加剤。
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