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Updated: May 5, 2026

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Production of Double-stranded DNA Ministrings
Published on: February 29, 2016
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LDL受容体遺伝子の42bp要素は,ウイルスのTKプロモーターに挿入されると,ステロールによって最終製品の抑制を与えます
Cell
|March 27, 1987
まとめ
コレステロールレベルは,特定のDNA配列を通じて,LDL受容体の遺伝子発現を調節する. このステロール調節要素 (SRE 42) には,抑制を媒介し,コレステロールの吸収を制御するリピートが含まれています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- バイオケミストリー バイオケミストリー
背景:
- 低密度リポタンパク質 (LDL) 受容体は,細胞のコレステロール吸収に不可欠です.
- 細胞のコレステロールの蓄積は,通常,LDL受容体の生成を抑制する.
研究 の 目的:
- ヒトのLDL受容体遺伝子のコレステロール媒介抑制に起因する特定のDNA要素を特定する.
- この最終製品の抑圧のメカニズムを解明する.
主な方法:
- ヘルペス・シンプレックスウイルスのTKプロモーターとリンクされたステロール調節要素42 (SRE 42) を含む融合遺伝子構造を用いた遺伝子変異検査.
- タンパク質とDNAの相互作用を特定するためのDNAアースIの足跡.
主要な成果:
- LDL受容体の5'-側面領域にある42bp要素 (SRE 42) は,コレステロール抑制に対する感受性を与える.
- SRE 42には,正または負の転写効果の両方を示す直接の繰り返しが含まれています.
- ステロールの存在は,SRE複製数に応じて,感染した細胞のmRNAレベルを57%~95%低下させた.
結論:
- ステロール調節因子42 (SRE 42) は,コレステロール誘発によるLDL受容体遺伝子の抑制の重要な媒介である.
- ステロールがSRE42に結合する陽性転写因子に対抗するモデルが提案されています.
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