Evidence map›Paper›PMID 12000794›Full record

ArticleGenes & development2002

An mt(+) gamete-specific nuclease that targets mt(-) chloroplasts during sexual reproduction in C. reinhardtii.

Yoshiki Nishimura, Osami Misumi, Ko Kato, Noriko Inada, Tetsuya Higashiyama, Yu Momoyama, Tsuneyoshi Kuroiwa

Open access · diamondAbstract read
In one paragraph

Article in Genes & development, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
–field-weighted citation impact
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

33 citing papers in PubMed, 81 citations in OpenAlex.

  1. Article
  2. Review
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  5. HBD1 protein with a tandem repeat of two HMG-box domains is a DNA clip to organize chloroplast nucleoids inProceedings of the National Academy of Sciences of the United States of America · 2021
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  8. Article
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  10. Review
  11. Article
  12. Article
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  14. Article
  15. Origins of eukaryotic sexual reproduction.Cold Spring Harbor perspectives in biology · 2014
    Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Review
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

7 authors at 1 institution in 1 country.

Yoshiki NishimuraDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo, Tokyo 113-0033, Japan.
Osami Misumi
Ko Kato
Noriko Inada
Tetsuya Higashiyama
Yu Momoyama
Tsuneyoshi Kuroiwa
The University of Tokyo · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although the active digestion of mating-type minus (mt-) chloroplast DNA (cpDNA) in young zygotes is considered to be the basis for the uniparental inheritance of cpDNA in Chlamydomonas reinhardtii, little is known about the underlying molecular mechanism. One model of active digestion proposes that nucleases are either synthesized or activated to digest mt- cpDNA. We used a native-PAGE/in gelo assay to investigate nuclease activities in chloroplasts from young zygotes, and identified a novel Ca(2+)-dependent nuclease activity. The timing of activation (approximately 60-90 min after mating) and the localization of the nuclease activity (in mt- chloroplasts) coincided with the active digestion of mt- cpDNA. Furthermore, the activity of the nuclease was coregulated with the maturation of mating-type plus (mt+) gametes, which would enable the efficient digestion of mt- cpDNA. Based on these observations, we propose that the nuclease (designated as Mt(+)-specific DNase, MDN) is a developmentally controlled nuclease that is activated in mt+ gametes and participates in the destruction of mt- cpDNA in young zygotes, thereby ensuring uniparental inheritance of chloroplast traits.

Indexed as

ReproductionAnimalsCalciumChlamydomonas reinhardtiiChloroplastsDeoxyribonucleasesDNAElectrophoresis, Gel, Two-DimensionalGerm CellsMembrane FusionZygoteCalciumDeoxyribonucleasesDNA

Identifiers

PMID12000794
PMCPMC186255
OpenAlexW2096161657

What OpenQuestion holds

Textmetadata
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.