DNAの歪みと,非接触塩基が434抑制器に対する434オペレータの親和性に与える影響

G B Koudelka¹, P Carlson

¹Department of Biological Sciences, State University of New York, Buffalo 14260.

Nature

|January 2, 1992

まとめ

バクテリオファージ434の抑制剤の結合親和性は,DNAによる影響を受けます.

科学分野:

分子生物学は分子生物学である.
構造生物学構造生物学とは
遺伝学遺伝学とは

背景:

バクテリオファージ434抑制剤は,オペレータ結合を通じて遺伝子発現を制御する.
オペレーターのサイトは,保護された外部の地域と分散した中央基地を展示しています.
中央基は,直接接触していないが,抑制器の結合親和性に影響する.

研究の目的:

DNAの固有の歪みと抑制剤結合親和の関係を調査する.
オペレーター機能を調節するDNA配列の役割を明らかにする.

主な方法:

DNAオペレータ配列とその中央塩基対の分析.
抑制器-オペレーター結合親和度の測定.
生物物理的技術を用いたDNAの歪みと柔軟性の評価.

主要な成果:

オペレーターの固有のDNAの歪みと,その抑制器結合親和性との間には,相関関係がある.
低 afinity のオペレータは,より高い afinity のオペレータと比較して, undertwisted DNA を示す.
抑制器の結合は,高親和と低親和の両方のオペレータの回転を正常化します.

結論:

本質的なDNAの回転とDNAの回転の柔軟性は,バクテリオファージ434の抑制器-オペレータの相互作用における重要な要因である.
これらのDNAの構造特性は,抑制器がオペレータ部位を区別する際に影響を及ぼします.

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