Structural and biochemical insights into small RNA 3' end trimming by Arabidopsis SDN1.
Structural and biochemical insights into small RNA 3' end trimming by Arabidopsis SDN1.
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拟南芥 SDN1 对小 RNA 3' 末端修剪的结构和生化见解
DOI:
10.1038/s41467-018-05942-7
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发表时间:
2018-09-04
影响因子:
16.6
通讯作者:
Ma J
中科院分区:
文献类型:
--
作者:
Chen J;Liu L;You C;Gu J;Ruan W;Zhang L;Gan J;Cao C;Huang Y;Chen X;Ma J
A family of DEDDh 3′→5′ exonucleases known as Small RNA Degrading Nucleases (SDNs) initiates the turnover of ARGONAUTE1 (AGO1)-bound microRNAs in Arabidopsis by trimming their 3′ ends. Here, we report the crystal structure of Arabidopsis SDN1 (residues 2-300) in complex with a 9 nucleotide single-stranded RNA substrate, revealing that the DEDDh domain forms rigid interactions with the N-terminal domain and binds 4 nucleotides from the 3′ end of the RNA via its catalytic pocket. Structural and biochemical results suggest that the SDN1 C-terminal domain adopts an RNA Recognition Motif (RRM) fold and is critical for substrate binding and enzymatic processivity of SDN1. In addition, SDN1 interacts with the AGO1 PAZ domain in an RNA-independent manner in vitro, enabling it to act on AGO1-bound microRNAs. These extensive structural and biochemical studies may shed light on a common 3′ end trimming mechanism for 3′→5′ exonucleases in the metabolism of small non-coding RNAs. Small RNA degrading nucleases (SDNs) can degrade short RNAs. Here the authors report the crystal structure of Arabidopsis SDN1 in complex with a single-stranded RNA, and provide new insight into 3′ end trimming mechanism of 3′ to 5′ riboexonucleases in the metabolism of various species of small RNAs.
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DOI:
10.1073/pnas.0906378106
发表时间:
2009-11-03
影响因子:
11.1
作者:
Han, Ting;Manoharan, Arun Prasad;Kim, John K.
通讯作者:
Kim, John K.
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
3.5
作者:
Horio, T;Murai, M;Ohgi, T
通讯作者:
Ohgi, T
影响因子:
9.2
作者:
Horwich, Michael D.;Li, Chengjian;Zamore, Phillip D.
通讯作者:
Zamore, Phillip D.
影响因子:
16.8
作者:
Gabel, Harrison W.;Ruvkun, Gary
通讯作者:
Ruvkun, Gary