3ADI

Structure of Arabidopsis HYL1 and its molecular implications for miRNA processing

3ADI の概要

• エントリーDOI: 10.2210/pdb3adi/pdb
• 関連するPDBエントリー: 3ADG 3ADJ 3ADL
• 分子名称: F21M12.9 protein, RNA (5'-R(P*CP*UP*CP*GP*AP*UP*AP*AP*CP*C)-3'), RNA (5'-R(*GP*GP*UP*UP*AP*UP*CP*GP*AP*G)-3') (3 entities in total)
• 機能のキーワード: hyl1, mirna processing mechanism, rna binding protein, gene regulation-rna complex, gene regulation/rna
• 由来する生物種: Arabidopsis thaliana (mouse-ear cress,thale-cress); 詳細
• 細胞内の位置: Nucleus: O04492
• タンパク質・核酸の鎖数: 5
• 化学式量合計: 31054.05

構造登録者

Yuan, Y.A.,Chen, H.Y. (登録日: 2010-01-22, 公開日: 2010-05-26, 最終更新日: 2023-11-01)

主引用文献

Yang, S.W.,Chen, H.Y.,Yang, J.,Machida, S.,Chua, N.H.,Yuan, Y.A.
Structure of arabidopsis HYPONASTIC LEAVES1 and its molecular implications for miRNA processing
Structure, 18:594-605, 2010

PubMed Abstract: The Arabidopsis HYPONASTIC LEAVES1 (HYL1) is a double-stranded RNA-binding protein that forms a complex with DICER-LIKE1 (DCL1) and SERRATE to facilitate processing of primary miRNAs into microRNAs (miRNAs). However, the structural mechanisms of miRNA maturation by this complex are poorly understood. Here, we present the crystal structures of double-stranded RNA binding domains (dsRBD1 and dsRBD2) of HYL1 and HYL1 dsRBD1 (HR1)/dsRNA complex as well as human TRBP2 dsRBD2 (TR2)/dsRNA complex for comparison analysis. Structural and functional study demonstrates that both HR1 and TR2 are canonical dsRBDs for dsRNA binding, whereas HR2 of HYL1 is a non-canonical dsRBD harboring a putative dimerization interface. Domain swapping within the context of HYL1 demonstrates that TR2 can supplant the function of HR1 in vitro and in vivo. Further biochemical analyses suggest that HYL1 probably binds to the miRNA/miRNA( *) region of precursors as a dimer mediated by HR2.

PubMed: 20462493
DOI: 10.1016/j.str.2010.02.006

実験手法

X-RAY DIFFRACTION (3.2 Å)