Evidence map›Paper›PMID 22735453›Full record

ArticleNature communications2012

ABCA4 is an N-retinylidene-phosphatidylethanolamine and phosphatidylethanolamine importer.

Faraz Quazi, Stepan Lenevich, Robert S Molday

Open access · hybridAbstract read
In one paragraph

Article in Nature communications, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 176 papers.

0numbers the graph read from it
0cells of the map it votes in
176citing papers in PubMed
17.3field-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

176 citing papers in PubMed, 266 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Advances and therapeutic opportunities in visual cycle modulation.Progress in retinal and eye research · 2025
    Review
  16. Article
  17. Article
  18. Article
  19. Review
  20. Vitamin A supply in the eye and establishment of the visual cycle.Current topics in developmental biology · 2025
    Review

116 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

3 authors at 1 institution in 1 country.

Faraz QuaziDepartment of Biochemistry and Molecular Biology, Centre for Macular Research, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3.
Stepan Lenevich
Robert S Molday
University of British Columbia · CA

Funding

STRUCTURE/FUNCTION OF ROS PLASMA MEMBRANE PROTEINSR01EY002422 · NEI · UNIVERSITY OF BRITISH COLUMBIA · PI MOLDAY, ROBERT S · 1985 to 2017
$3.5M
CIHR RMF-92101NEI NIH HHS EY002422NEI NIH HHS R01 EY002422
6 · The paper itself

Abstract

ATP-binding cassette (ABC) transporters comprise a superfamily of proteins, which actively transport a variety of compounds across cell membranes. Mammalian and most eukaryotic ABC transporters function as exporters, flipping or extruding substrates from the cytoplasmic to the extracellular or lumen side of cell membranes. Prokaryotic ABC transporters function either as exporters or importers. Here we show that ABCA4, an ABC transporter found in retinal photoreceptor cells and associated with Stargardt macular degeneration, is a novel importer that actively flips N-retinylidene-phosphatidylethanolamine from the lumen to the cytoplasmic leaflet of disc membranes, thereby facilitating the removal of potentially toxic retinoid compounds from photoreceptors. ABCA4 also actively transports phosphatidylethanolamine in the same direction. Mutations known to cause Stargardt disease decrease N-retinylidene-phosphatidylethanolamine and phosphatidylethanolamine transport activity of ABCA4. These studies provide the first direct evidence for a mammalian ABC transporter that functions as an importer and provide insight into mechanisms underlying substrate transport and the molecular basis of Stargardt disease.

Indexed as

AnimalsATP-Binding Cassette TransportersLiposomesMiceMice, KnockoutPhosphatidylethanolaminesPhotoreceptor Cells, VertebrateRetinoidsAbca4 protein, mouseATP-Binding Cassette TransportersLiposomesN-retinylidene-phosphatidylethanolaminePhosphatidylethanolaminesRetinoids

Identifiers

PMID22735453
PMCPMC3871175
OpenAlexW1997517812

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.