Spanish Ministry of Science, Innovation, and Universities
PID2020-120275GB-I00
スペイン
Spanish Ministry of Science, Innovation, and Universities
PRE2018-086026
スペイン
引用
ジャーナル: Nature / 年: 2024 タイトル: Molecular basis for transposase activation by a dedicated AAA+ ATPase. 著者: Álvaro de la Gándara / Mercedes Spínola-Amilibia / Lidia Araújo-Bazán / Rafael Núñez-Ramírez / James M Berger / Ernesto Arias-Palomo / 要旨: Transposases drive chromosomal rearrangements and the dissemination of drug-resistance genes and toxins. Although some transposases act alone, many rely on dedicated AAA+ ATPase subunits that ...Transposases drive chromosomal rearrangements and the dissemination of drug-resistance genes and toxins. Although some transposases act alone, many rely on dedicated AAA+ ATPase subunits that regulate site selectivity and catalytic function through poorly understood mechanisms. Using IS21 as a model transposase system, we show how an ATPase regulator uses nucleotide-controlled assembly and DNA deformation to enable structure-based site selectivity, transposase recruitment, and activation and integration. Solution and cryogenic electron microscopy studies show that the IstB ATPase self-assembles into an autoinhibited pentamer of dimers that tightly curves target DNA into a half-coil. Two of these decamers dimerize, which stabilizes the target nucleic acid into a kinked S-shaped configuration that engages the IstA transposase at the interface between the two IstB oligomers to form an approximately 1 MDa transpososome complex. Specific interactions stimulate regulator ATPase activity and trigger a large conformational change on the transposase that positions the catalytic site to perform DNA strand transfer. These studies help explain how AAA+ ATPase regulators-which are used by classical transposition systems such as Tn7, Mu and CRISPR-associated elements-can remodel their substrate DNA and cognate transposases to promote function.
UniProtKB: Insertion sequence IS5376 putative ATP-binding protein
+
分子 #3: DNA (118-MER) / TIR-transferred strand
分子
名称: DNA (118-MER) / TIR-transferred strand / タイプ: dna / ID: 3 詳細: complete sequence of the right terminal inverted repeat (TIR) covalently bound to a target DNA コピー数: 2 / 分類: DNA
名称: DNA (58-MER) / TIR non-transferred strand / タイプ: dna / ID: 4 詳細: complementary sequence of the right terminal inverted repeat (TIR) コピー数: 2 / 分類: DNA