Evidence map›Paper›PMID 21498682›Full record

ArticleThe Plant cell2011

Systems biology approach in Chlamydomonas reveals connections between copper nutrition and multiple metabolic steps.

Madeli Castruita, David Casero, Steven J Karpowicz, Janette Kropat, Astrid Vieler, Scott I Hsieh, Weihong Yan, Shawn Cokus, Joseph A Loo, Christoph Benning and 2 more

Open access · hybridAbstract read
In one paragraph

Article in The Plant cell, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 112 papers.

0numbers the graph read from it
0cells of the map it votes in
112citing papers in PubMed
10.0field-weighted citation impact, top 1% 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

112 citing papers in PubMed, 217 citations in OpenAlex.

  1. Article
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  4. The Elements of Life, Photosynthesis and Genomics.Journal of molecular biology · 2025
    Review
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  20. Single-cell visualization and quantification of trace metals inProceedings of the National Academy of Sciences of the United States of America · 2021
    Article

52 more citing papers are in PubMed but not listed here.

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

12 authors at 2 institutions in 1 country.

Madeli CastruitaDepartment of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
David Casero
Steven J Karpowicz
Janette Kropat
Astrid Vieler
Scott I Hsieh
Weihong Yan
Shawn Cokus
Joseph A Loo
Christoph Benning
Matteo Pellegrini
Sabeeha S Merchant
University of California, Los Angeles · USMichigan State University · US

Funding

UCLA NIGMS T32 Program AssessmentT32GM007185 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI TORRES, JORGE · 1985 to 2020
$21.7M
Nutritional Cu Signaling and HomeostasisR01GM042143 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI SABEEHA MERCHANT · 1995 to 2026
$4.6M
Nutritional Copper Signaling and HomeostasisR37GM042143 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MERCHANT, SABEEHA · 2011 to 2020
$4.3M
Genomic Approaches to Divining Mechanisms for Acclimation Cu DefiencyF32GM086006 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI CASTRUITA, MADELI · 2008 to 2010
$97k
CU-DEPENDENT TRANSCRIPTIONAL REGULATIONR29GM042143 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MERCHANT, SABEEHA · 1989 to 1993
–
NIGMS NIH HHS F32 GM086006NIGMS NIH HHS GM07185NIGMS NIH HHS GM42143NIGMS NIH HHS R01 GM042143NIGMS NIH HHS R37 GM042143NIGMS NIH HHS T32 GM007185
6 · The paper itself

Abstract

In this work, we query the Chlamydomonas reinhardtii copper regulon at a whole-genome level. Our RNA-Seq data simulation and analysis pipeline validated a 2-fold cutoff and 10 RPKM (reads per kilobase of mappable length per million mapped reads) (~1 mRNA per cell) to reveal 63 CRR1 targets plus another 86 copper-responsive genes. Proteomic and immunoblot analyses captured 25% of the corresponding proteins, whose abundance was also dependent on copper nutrition, validating transcriptional regulation as a major control mechanism for copper signaling in Chlamydomonas. The impact of copper deficiency on the expression of several O₂-dependent enzymes included steps in lipid modification pathways. Quantitative lipid profiles indicated increased polyunsaturation of fatty acids on thylakoid membrane digalactosyldiglycerides, indicating a global impact of copper deficiency on the photosynthetic apparatus. Discovery of a putative plastid copper chaperone and a membrane protease in the thylakoid suggest a mechanism for blocking copper utilization in the chloroplast. We also found an example of copper sparing in the N assimilation pathway: the replacement of copper amine oxidase by a flavin-dependent backup enzyme. Forty percent of the targets are previously uncharacterized proteins, indicating considerable potential for new discovery in the biology of copper.

Indexed as

Systems BiologyAutotrophic ProcessesBase SequenceChlamydomonasCopperGene Expression ProfilingGene Expression Regulation, PlantGenes, PlantGenetic LociHeterotrophic ProcessesMetabolismMolecular Sequence DataNutritional Physiological PhenomenaOxidation-ReductionPlant ProteinsPromoter Regions, GeneticCopperPlant ProteinsProteomeRNA, MessengerRNA, Plant

Identifiers

PMID21498682
PMCPMC3101551
OpenAlexW2154180400

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.