Evidence map›Paper›PMID 21368162›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Asparagine repeat function in a Plasmodium falciparum protein assessed via a regulatable fluorescent affinity tag.

Vasant Muralidharan, Anna Oksman, Mari Iwamoto, Thomas J Wandless, Daniel E Goldberg

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed
10.0field-weighted citation impact, top 2% 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

88 citing papers in PubMed, 148 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Characterization of the Regulatory AAA-ATPase Subunit Rpt3 inInternational journal of molecular sciences · 2025
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  10. Overexpression inFrontiers in cellular and infection microbiology · 2025
    Article
  11. Article
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  15. Article
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  17. Profile of Daniel E. Goldberg.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  18. Article
  19. Article
  20. Article

28 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

5 authors at 3 institutions in 1 country.

Vasant MuralidharanDepartments of Medicine and Molecular Microbiology, Howard Hughes Medical Institute, Washington University School of Medicine, St Louis, MO 63110, USA.
Anna Oksman
Mari Iwamoto
Thomas J Wandless
Daniel E Goldberg
Howard Hughes Medical Institute · USStanford University · USWashington University in St. Louis · US

Funding

Infectious Diseases/Basic Microbial Pathogenic MechanismsT32AI007172 · NIAID · WASHINGTON UNIVERSITY · PI Daniel E. Goldberg, JENNIFER A PHILIPS · 1985 to 2026
$13.0M
Howard Hughes Medical Institute
6 · The paper itself

Abstract

One in four proteins in Plasmodium falciparum contains asparagine repeats. We probed the function of one such 28-residue asparagine repeat present in the P. falciparum proteasome lid subunit 6, Rpn6. To aid our efforts, we developed a regulatable, fluorescent affinity (RFA) tag that allows cellular localization, manipulation of cellular levels, and affinity isolation of a chosen protein in P. falciparum. The tag comprises a degradation domain derived from Escherichia coli dihydrofolate reductase together with GFP. The expression of RFA-tagged proteins is regulated by the simple folate analog trimethoprim (TMP). Parasite lines were generated in which full-length Rpn6 and an asparagine repeat-deletion mutant of Rpn6 were fused to the RFA tag. The knockdown of Rpn6 upon removal of TMP revealed that this protein is essential for ubiquitinated protein degradation and for parasite survival, but the asparagine repeat is dispensable for protein expression, stability, and function. The data point to a genomic mechanism for repeat perpetuation rather than a positive cellular role. The RFA tag should facilitate study of the role of essential genes in parasite biology.

Indexed as

Repetitive Sequences, Amino AcidAsparagineErythrocytesFluorescent DyesGenes, EssentialMutant ProteinsPlasmodium falciparumProteasome Endopeptidase ComplexProtein StabilityProtein Structure, TertiaryProtozoan ProteinsRecombinant ProteinsReproducibility of ResultsSequence DeletionTrimethoprimUbiquitinationAsparagineFluorescent DyesMutant ProteinsProteasome Endopeptidase ComplexProtozoan ProteinsRecombinant ProteinsTrimethoprim

Identifiers

PMID21368162
PMCPMC3060247
OpenAlexW2058302605

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.