Evidence map›Paper›PMID 20127142›Full record

ArticlePlant molecular biology2010

Chlorophyll-deficient mutants of Chlamydomonas reinhardtii that accumulate magnesium protoporphyrin IX.

Linda Meinecke, Ali Alawady, Michael Schroda, Robert Willows, Marilyn C Kobayashi, Krishna K Niyogi, Bernhard Grimm, Christoph F Beck

Open access · hybridAbstract read
In one paragraph

Article in Plant molecular biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.9field-weighted citation impact, top 26% 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

16 citing papers in PubMed, 37 citations in OpenAlex.

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  11. Tetrapyrrole Signaling in Plants.Frontiers in plant science · 2016
    Review
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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 5 institutions in 3 countries.

Linda MeineckeFakultaet fuer Biologie, Institut fuer Biologie III, Universitaet Freiburg, Schaenzlestrasse 1, 79104, Freiburg, Germany.
Ali Alawady
Michael Schroda
Robert Willows
Marilyn C Kobayashi
Krishna K Niyogi
Bernhard Grimm
Christoph F Beck
Humboldt State University · USUniversity of California System · USMacquarie University · AUMax Planck Institute of Molecular Plant Physiology · DEUniversity of Freiburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Two Chlamydomonas reinhardtii mutants defective in CHLM encoding Mg-protoporphyrin IX methyltransferase (MgPMT) were identified. The mutants, one with a missense mutation (chlM-1) and a second mutant with a splicing defect (chlM-2), do not accumulate chlorophyll, are yellow in the dark and dim light, and their growth is inhibited at higher light intensities. They accumulate Mg-protoporphyrin IX (MgProto), the substrate of MgPMT and this may be the cause for their light sensitivity. In the dark, both mutants showed a drastic reduction in the amounts of core proteins of photosystems I and II and light-harvesting chlorophyll a/b-binding proteins. However, LHC mRNAs accumulated above wild-type levels. The accumulation of the transcripts of the LHC and other genes that were expressed at higher levels in the mutants during dark incubation was attenuated in the initial phase of light exposure. No regulatory effects of the constitutively 7- to 18-fold increased MgProto levels on gene expression were detected, supporting previous results in which MgProto and heme in Chlamydomonas were assigned roles as second messengers only in the transient activation of genes by light.

Indexed as

MutationAlgal ProteinsBase SequenceCarotenoidsChlamydomonas reinhardtiiChlorophyllGene Expression RegulationHemeLightLight-Harvesting Protein ComplexesMethyltransferasesMolecular Sequence DataMutation, MissenseProtoporphyrinsRNA, MessengerRNA SplicingAlgal ProteinsCarotenoidsChlorophyllHemeLight-Harvesting Protein Complexesmagnesium protoporphyrinmagnesium-protoporphyrin methyltransferaseMethyltransferasesProtoporphyrinsRNA, MessengerTetrapyrroles

Identifiers

PMID20127142
PMCPMC2837180
OpenAlexW2025365518

What OpenQuestion holds

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LicenceCC BY-NC
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.