Evidence map›Paper›PMID 32914505›Full record

ArticleThe EMBO journal2020

Siwi levels reversibly regulate secondary piRISC biogenesis by affecting Ago3 body morphology in Bombyx mori.

Kazumichi M Nishida, Kazuhiro Sakakibara, Tetsutaro Sumiyoshi, Hiroya Yamazaki, Taro Mannen, Takeshi Kawamura, Tatsuhiko Kodama, Mikiko C Siomi

Open access · greenAbstract read
In one paragraph

Article in The EMBO journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
0.9field-weighted citation impact, top 27% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 17 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Kazumichi M Nishida *Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Kazuhiro Sakakibara *Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Tetsutaro SumiyoshiDepartment of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Hiroya YamazakiDepartment of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Taro MannenDepartment of Molecular Biology, Keio University School of Medicine, Tokyo, Japan.
Takeshi KawamuraProteomics Laboratory, Isotope Science Center, The University of Tokyo, Tokyo, Japan.
Tatsuhiko KodamaLaboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan.
Mikiko C SiomiDepartment of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.ORCID 0000-0002-6149-4396
The University of Tokyo · JPKeio University · JP

Funding

MEXT | Japan Society for the Promotion of Science (JSPS) 18J11121MEXT | Japan Society for the Promotion of Science (JSPS) 19J12479Ministry of Education, Culture, Sports, Science and Technology (MEXT) 19H05466Ministry of Education, Culture, Sports, Science and Technology (MEXT) 20K06483
6 · The paper itself

Abstract

Silkworm ovarian germ cells produce the Siwi-piRNA-induced silencing complex (piRISC) through two consecutive mechanisms, the primary pathway and the secondary ping-pong cycle. Primary Siwi-piRISC production occurs on the outer mitochondrial membrane in an Ago3-independent manner, where Tudor domain-containing Papi binds unloaded Siwi via its symmetrical dimethylarginines (sDMAs). Here, we now show that secondary Siwi-piRISC production occurs at the Ago3-positive nuage Ago3 bodies, in an Ago3-dependent manner, where Vreteno (Vret), another Tudor protein, interconnects unloaded Siwi and Ago3-piRISC through their sDMAs. Upon Siwi depletion, Ago3 is phosphorylated and insolubilized in its piRISC form with cleaved RNAs and Vret, suggesting that the complex is stalled in the intermediate state. The Ago3 bodies are also enlarged. The aberrant morphology is restored upon Siwi re-expression without Ago3-piRISC supply. Thus, Siwi depletion aggregates the Ago3 bodies to protect the piRNA intermediates from degradation until the normal cellular environment returns to re-initiate the ping-pong cycle. Overall, these findings reveal a unique regulatory mechanism controlling piRNA biogenesis.

Indexed as

AnimalsArginineArgonaute ProteinsBombyxCell NucleusCells, CulturedChromatography, LiquidComputational BiologyFemaleGerm CellsInsect ProteinsOvaryPhosphorylationRNA InterferenceRNA-SeqRNA, Small InterferingArginineArgonaute ProteinsdimethylarginineInsect ProteinsRNA, Small InterferingAgo3nuagephosphorylationSiwiVreteno

Identifiers

PMID32914505
PMCPMC7560202
OpenAlexW3086095145

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.