ジャーナル: Nucleic Acids Res / 年: 2024 タイトル: The missing part: the Archaeoglobus fulgidus Argonaute forms a functional heterodimer with an N-L1-L2 domain protein. 著者: Elena Manakova / Edvardas Golovinas / Reda Pocevičiūtė / Giedrius Sasnauskas / Arunas Silanskas / Danielis Rutkauskas / Marija Jankunec / Evelina Zagorskaitė / Edvinas Jurgelaitis / ...著者: Elena Manakova / Edvardas Golovinas / Reda Pocevičiūtė / Giedrius Sasnauskas / Arunas Silanskas / Danielis Rutkauskas / Marija Jankunec / Evelina Zagorskaitė / Edvinas Jurgelaitis / Algirdas Grybauskas / Česlovas Venclovas / Mindaugas Zaremba 要旨: Argonaute (Ago) proteins are present in all three domains of life (bacteria, archaea and eukaryotes). They use small (15-30 nucleotides) oligonucleotide guides to bind complementary nucleic acid ...Argonaute (Ago) proteins are present in all three domains of life (bacteria, archaea and eukaryotes). They use small (15-30 nucleotides) oligonucleotide guides to bind complementary nucleic acid targets and are responsible for gene expression regulation, mobile genome element silencing, and defence against viruses or plasmids. According to their domain organization, Agos are divided into long and short Agos. Long Agos found in prokaryotes (long-A and long-B pAgos) and eukaryotes (eAgos) comprise four major functional domains (N, PAZ, MID and PIWI) and two structural linker domains L1 and L2. The majority (∼60%) of pAgos are short pAgos, containing only the MID and inactive PIWI domains. Here we focus on the prokaryotic Argonaute AfAgo from Archaeoglobus fulgidus DSM4304. Although phylogenetically classified as a long-B pAgo, AfAgo contains only MID and catalytically inactive PIWI domains, akin to short pAgos. We show that AfAgo forms a heterodimeric complex with a protein encoded upstream in the same operon, which is a structural equivalent of the N-L1-L2 domains of long pAgos. This complex, structurally equivalent to a long PAZ-less pAgo, outperforms standalone AfAgo in guide RNA-mediated target DNA binding. Our findings provide a missing piece to one of the first and the most studied pAgos.
温度: 280 K / 手法: 蒸気拡散法, シッティングドロップ法 詳細: Protein concentration 4.1 mg/ml. Reservoir: TrisHCl pH 8.0 0.05 M; iPrOH 27%; ammonium acetate 0.11 M; Bicine pH 9.0 0.05 M. Cryo-protection: short wash in 0.16 M Ammonium acetate; 0.08 M ...詳細: Protein concentration 4.1 mg/ml. Reservoir: TrisHCl pH 8.0 0.05 M; iPrOH 27%; ammonium acetate 0.11 M; Bicine pH 9.0 0.05 M. Cryo-protection: short wash in 0.16 M Ammonium acetate; 0.08 M TrisHCl pH 8.5; 24% iPrOH; Glycerol 20% PH範囲: 8-9
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データ収集
回折
平均測定温度: 100 K / Serial crystal experiment: N
放射光源
由来: シンクロトロン / サイト: PETRA III, EMBL c/o DESY / ビームライン: P13 (MX1) / 波長: 0.9797 Å
構造決定の手法: 分子置換 / 解像度: 1.4→53.7 Å / Cor.coef. Fo:Fc: 0.977 / Cor.coef. Fo:Fc free: 0.968 / 交差検証法: THROUGHOUT / ESU R: 0.056 / ESU R Free: 0.054 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
Rfactor
反射数
%反射
Selection details
Rfree
0.17772
6208
10.1 %
RANDOM
Rwork
0.14458
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-
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obs
0.1479
55371
99.99 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.4 Å / 溶媒モデル: MASK