Evidence map›Paper›PMID 23439652›Full record

ArticleThe Journal of biological chemistry2013

Zinc deficiency impacts CO2 assimilation and disrupts copper homeostasis in Chlamydomonas reinhardtii.

Davin Malasarn, Janette Kropat, Scott I Hsieh, Giovanni Finazzi, David Casero, Joseph A Loo, Matteo Pellegrini, Francis-André Wollman, Sabeeha S Merchant

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
5.8field-weighted citation impact, top 3% 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

35 citing papers in PubMed, 83 citations in OpenAlex.

  1. Article
  2. Article
  3. The Elements of Life, Photosynthesis and Genomics.Journal of molecular biology · 2025
    Review
  4. A defined growth medium for trace metal limitation studies inbioRxiv : the preprint server for biology · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Single-cell visualization and quantification of trace metals inProceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Regulating cellular trace metal economy in algae.Current opinion in plant biology · 2017
    Review
  20. Article
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

9 authors at 2 institutions in 2 countries.

Davin MalasarnDepartment of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA.
Janette Kropat
Scott I Hsieh
Giovanni Finazzi
David Casero
Joseph A Loo
Matteo Pellegrini
Francis-André Wollman
Sabeeha S Merchant
University of California, Los Angeles · USInstitut de Biologie Physico-Chimique · FR

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
Dissecting the Regulation of Zinc-HomeostasisF32GM083562 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MALASARN, DAVIN · 2008 to 2010
$97k
CU-DEPENDENT TRANSCRIPTIONAL REGULATIONR29GM042143 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MERCHANT, SABEEHA · 1989 to 1993
–
NIGMS NIH HHS F32GM083562NIGMS NIH HHS GM42143NIGMS NIH HHS R01 GM042143NIGMS NIH HHS R37 GM042143NIGMS NIH HHS T32 GM07185
6 · The paper itself

Abstract

Zinc is an essential nutrient because of its role in catalysis and in protein stabilization, but excess zinc is deleterious. We distinguished four nutritional zinc states in the alga Chlamydomonas reinhardtii: toxic, replete, deficient, and limited. Growth is inhibited in zinc-limited and zinc-toxic cells relative to zinc-replete cells, whereas zinc deficiency is visually asymptomatic but distinguished by the accumulation of transcripts encoding ZIP family transporters. To identify targets of zinc deficiency and mechanisms of zinc acclimation, we used RNA-seq to probe zinc nutrition-responsive changes in gene expression. We identified genes encoding zinc-handling components, including ZIP family transporters and candidate chaperones. Additionally, we noted an impact on two other regulatory pathways, the carbon-concentrating mechanism (CCM) and the nutritional copper regulon. Targets of transcription factor Ccm1 and various CAH genes are up-regulated in zinc deficiency, probably due to reduced carbonic anhydrase activity, validated by quantitative proteomics and immunoblot analysis of Cah1, Cah3, and Cah4. Chlamydomonas is therefore not able to grow photoautotrophically in zinc-limiting conditions, but supplementation with 1% CO2 restores growth to wild-type rates, suggesting that the inability to maintain CCM is a major consequence of zinc limitation. The Crr1 regulon responds to copper limitation and is turned on in zinc deficiency, and Crr1 is required for growth in zinc-limiting conditions. Zinc-deficient cells are functionally copper-deficient, although they hyperaccumulate copper up to 50-fold over normal levels. We suggest that zinc-deficient cells sequester copper in a biounavailable form, perhaps to prevent mismetallation of critical zinc sites.

Indexed as

Adaptor Proteins, Signal TransducingCarbon DioxideCation Transport ProteinsChlamydomonas reinhardtiiCopperHomeostasisPlant ProteinsZincAdaptor Proteins, Signal TransducingCarbon DioxideCation Transport Proteinsccm1 protein, Chlamydomonas reinhardtiiCopperPlant ProteinsZinc

Identifiers

PMID23439652
PMCPMC3624447
OpenAlexW2170200413

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.