バーキットリンパ腫のc-mycロカスにおける点変異は,核タンパク質の結合を廃止する
M Zajac-Kaye1, E P Gelmann, D Levens
1Medicine Branch, National Cancer Institute, Bethesda, MD 20892.
Science (New York, N.Y.)
|June 24, 1988
まとめ
核タンパク質は,ヒトのc-myc遺伝子の重要な領域に結合する. この結合部位の突然変異は,ブルキットリンパ腫において一般的であり,c-myc遺伝子の活性化を引き起こす可能性があります.
科学分野:
- 分子生物学は分子生物学である.
- がん遺伝学 がん遺伝学
- 遺伝子規制 遺伝子規制
背景:
- c-myc遺伝子は,細胞の成長と分化に不可欠な原発がん遺伝子である.
- c-myc発現の調節不全は,バーキットリンパ腫を含む様々ながんに関与しています.
- 特定のDNA結合タンパク質は,c-myc遺伝子発現を制御する役割を果たします.
研究 の 目的:
- 人間のc-myc遺伝子の最初のイントロンの内にある核タンパク質結合部位を調査する.
- バーキットリンパ腫におけるこの結合部位内の突然変異の重要性を決定する.
- c-myc遺伝子調節におけるこの核タンパク質の役割を明らかにする.
主な方法:
- 人間のc-myc遺伝子の第1イントロンの20塩基対の核タンパク質結合部位の特定.
- Burkittリンパ腫細胞系 (PA682) から t(8;22) トランスロケーションによるc-mycアレルの配列決定.
- PA682 c-myc DNAの結合領域内の特定の点変異の分析.
主要な成果:
- 人間のc-myc第一イントロンの20塩基対の領域は,核タンパク質の結合部位として特定されました.
- この結合部位の変異は,分析された7つのブルキットリンパ腫のうち5つのリンパ腫で発見されました.
- PA682 c-myc DNA結合領域の点変異により,核タンパク質結合が廃止されました.
結論:
- 特定された核タンパク質は,c-myc遺伝子発現の重要な調節因子である可能性があります.
- タンパク質の認識配列の変異は,ブルキットリンパ腫におけるc-myc活性化と潜在的に関連している.
- このタンパク質とDNAの相互作用に関するさらなる研究は,ブルキットリンパ腫の治療標的を明らかにする可能性がある.
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