Evidence map›Paper›PMID 9504916›Full record

ArticleGenetics1998

Genetic analysis of chloroplast c-type cytochrome assembly in Chlamydomonas reinhardtii: One chloroplast locus and at least four nuclear loci are required for heme attachment.

Z Xie, D Culler, B W Dreyfuss, R Kuras, F A Wollman, J Girard-Bascou, S Merchant

Open access · bronzeAbstract read
In one paragraph

Article in Genetics, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

25 citing papers in PubMed, 71 citations in OpenAlex.

  1. Article
  2. The Elements of Life, Photosynthesis and Genomics.Journal of molecular biology · 2025
    Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Maturation of PlastidFrontiers in plant science · 2017
    Review
  11. Article
  12. Article
  13. Article
  14. Regulatory factors for the assembly of thylakoid membrane protein complexes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2012
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. CcsBA is a cytochrome c synthetase that also functions in heme transport.Proceedings of the National Academy of Sciences of the United States of America · 2009
    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

7 authors at 2 institutions in 2 countries.

Z XieDepartment of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095-1569, USA.
D Culler
B W Dreyfuss
R Kuras
F A Wollman
J Girard-Bascou
S Merchant
University of California, Los Angeles · USInstitut de Biologie Physico-Chimique · FR

Funding

MATURATION OF CHLOROPLAST CYTOCHROMESR01GM048350 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MERCHANT, SABEEHA · 1993 to 2001
$413k
ISOLATION OF GENES INVOLVED IN CYTOCHROME BIOGENESISF32GM017483 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI DREYFUSS, BETH W · 1995 to 1997
–
UCLA TRAINING PROGRAM IN BIOTECHNOLOGYT32GM008375 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FOX, CHARLES F · 1990 to 1999
–
NIGMS NIH HHS GM-08375NIGMS NIH HHS GM-17483NIGMS NIH HHS GM-48350
6 · The paper itself

Abstract

Chloroplasts contain up to two c-type cytochromes, membrane-anchored cytochrome f and soluble cytochrome c6. To elucidate the post-translational events required for their assembly, acetate-requiring mutants of Chlamydomonas reinhardtii that have combined deficiencies in both plastid-encoded cytochrome f and nucleus-encoded cytochrome c6 have been identified and analyzed. For strains ct34 and ct59, where the phenotype displays uniparental inheritance, the mutations were localized to the chloroplast ccsA gene, which was shown previously to be required for heme attachment to chloroplast apocytochromes. The mutations in another eight strains were localized to the nuclear genome. Complementation tests of these strains plus three previously identified strains of the same phenotype (ac206, F18, and F2D8) indicate that the 11 ccs strains define four nuclear loci, CCS1-CCS4. We conclude that the products of the CCS1-CCS4 loci are not required for translocation or processing of the preproteins but, like CcsA, they are required for the heme attachment step during assembly of both holocytochrome f and holocytochrome c6. The ccsA gene is transcribed in each of the nuclear mutants, but its protein product is absent in ccs1 mutants, and it appears to be degradation susceptible in ccs3 and ccs4 strains. We suggest that Ccsl may be associated with CcsA in a multisubunit "holocytochrome c assembly complex," and we hypothesize that the products of the other CCS loci may correspond to other subunits.

Indexed as

AnimalsChlamydomonas reinhardtiiChloroplastsCytochromesCytochromes fGenes, ProtozoanGenetic Complementation TestHemeNuclear ProteinsProtein Processing, Post-TranslationalProtozoan ProteinsccsA protein, protozoanCytochromesCytochromes fHemeNuclear ProteinsProtozoan Proteins

Identifiers

PMID9504916
PMCPMC1459829
OpenAlexW1860220216

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.