新型アディポサイト長鎖脂肪酸輸送タンパク質の表現クローニングと特徴付け
1Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142.
Cell
|November 4, 1994
まとめ
研究者らは,長鎖脂肪酸 (LCFA) の細胞への吸収を促進する新しい脂肪酸輸送タンパク質 (FATP) を特定した. この発見は,これらの重要なエネルギー基板がどのように細胞膜を横断するかを明らかにします.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- 長鎖脂肪酸 (LCFA) は,心筋細胞を含む細胞にとって重要なエネルギー源である.
- プラズマ膜を横断するLCFA輸送の正確なメカニズムは,ほとんど不明のままです.
- このプロセスを理解することは,細胞のエネルギー代謝にとって極めて重要です.
研究 の 目的:
- 長い鎖の脂肪酸 (LCFA) の細胞への吸収に起因する分子機構を特定する.
- 脂肪酸の輸送に関与する新しいタンパク質の特徴を明らかにする.
主な方法:
- 3T3-L1アディポサイトからのcDNAライブラリを使用して,表現クローニング戦略を使用しました.
- LCFAの吸収への影響を評価するために,培養細胞で特定されたcDNAを表現した.
- タンパク質の局所化を決定するために,免疫細胞化学とサブセルラー分化を使用しています.
主要な成果:
- 646アミノ酸脂肪酸輸送タンパク質 (FATP) をコードする新しいcDNAを特定しました.
- FATPタンパク質は6つの予測された膜横断領域を有し,膜と関連しています.
- FATPが3T3-L1脂肪細胞の血に局所されていることが実証されました.
- FATPの発現は,培養細胞におけるLCFAの吸収を著しく増加させた.
結論:
- 脂肪酸輸送タンパク質 (FATP) は,長鎖脂肪酸 (LCFA) のプラズマ膜輸送体として機能します.
- この発見は,LCFAが細胞にどのように侵入するかを理解するための分子基盤を提供します.
- FATPは,細胞脂肪酸の代謝とエネルギー利用の重要な役割を果たしています.
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