Evidence map›Paper›PMID 34625547›Full record

ArticleNature communications2021

Cryo-EM structures of the ABCA4 importer reveal mechanisms underlying substrate binding and Stargardt disease.

Jessica Fernandes Scortecci, Laurie L Molday, Susan B Curtis, Fabian A Garces, Pankaj Panwar, Filip Van Petegem, Robert S Molday

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
4.7field-weighted citation impact, top 4% 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

38 citing papers in PubMed, 57 citations in OpenAlex.

  1. Article
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  5. Article
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  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Assessment of ABCA4 Genetic Variants: Current Landscape and Future Prospects.Advances in experimental medicine and biology · 2025
    Review
  14. Review
  15. Article
  16. Review
  17. Article
  18. The Surviving, Not Thriving, Photoreceptors in Patients withDiagnostics (Basel, Switzerland) · 2024
    Article
  19. Novel and Recurrent Copy Number Variants inInternational journal of molecular sciences · 2024
    Article
  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

7 authors at 2 institutions in 1 country.

Jessica Fernandes ScortecciDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.ORCID 0000-0002-9734-3477
Laurie L MoldayDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
Susan B CurtisDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
Fabian A GarcesDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
Pankaj PanwarDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
Filip Van PetegemDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
Robert S MoldayDepartment of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada. molday@mail.ubc.ca.ORCID 0000-0002-4479-1831
University of British Columbia · CAUniversity of British Columbia Hospital · CA

Funding

Pacific Northwest Center for Cryo-EM - Screening supplementU24GM129547 · NIGMS · OREGON HEALTH & SCIENCE UNIVERSITY · PI EVANS, JAMES E, GOUAUX, JAMES E · 2018 to 2023
$54.8M
NIGMS NIH HHS U24 GM129547
6 · The paper itself

Abstract

ABCA4 is an ATP-binding cassette (ABC) transporter that flips N-retinylidene-phosphatidylethanolamine (N-Ret-PE) from the lumen to the cytoplasmic leaflet of photoreceptor membranes. Loss-of-function mutations cause Stargardt disease (STGD1), a macular dystrophy associated with severe vision loss. To define the mechanisms underlying substrate binding and STGD1, we determine the cryo-EM structure of ABCA4 in its substrate-free and bound states. The two structures are similar and delineate an elongated protein with the two transmembrane domains (TMD) forming an outward facing conformation, extended and twisted exocytoplasmic domains (ECD), and closely opposed nucleotide binding domains. N-Ret-PE is wedged between the two TMDs and a loop from ECD1 within the lumen leaflet consistent with a lateral access mechanism and is stabilized through hydrophobic and ionic interactions with residues from the TMDs and ECDs. Our studies provide a framework for further elucidating the molecular mechanism associated with lipid transport and disease and developing promising disease interventions.

Indexed as

ATP-Binding Cassette TransportersBinding SitesBiological TransportCryoelectron MicroscopyHEK293 CellsHumansMacular DegenerationMutationPhosphatidylethanolaminesProtein DomainsRetinoidsStargardt DiseaseABCA4 protein, humanATP-Binding Cassette TransportersN-retinylidene-phosphatidylethanolaminephosphatidylethanolaminePhosphatidylethanolaminesRetinoids

Identifiers

PMID34625547
PMCPMC8501128
OpenAlexW3204885663

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.