Evidence map›Paper›PMID 37224812›Full record

ArticleCell2023

Structural and functional insights into Spns2-mediated transport of sphingosine-1-phosphate.

Hongwen Chen, Shahbaz Ahmed, Hongtu Zhao, Nadia Elghobashi-Meinhardt, Yaxin Dai, Jae Hun Kim, Jeffrey G McDonald, Xiaochun Li, Chia-Hsueh Lee

Open access · greenAbstract read
In one paragraph

Article in Cell, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
8.0field-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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 52 citations in OpenAlex.

  1. Pooled it
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  15. SPNS1 is an essential cellular factor for EV-A71 by acting as a transporter of viral pocket factor.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  16. Molecular basis of prostaglandin ENature communications · 2025
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 2 countries.

Hongwen ChenDepartment of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Shahbaz AhmedDepartment of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Hongtu ZhaoDepartment of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Nadia Elghobashi-MeinhardtInstitute of Chemistry, Technical University Berlin, 10623 Berlin, Germany.
Yaxin DaiDepartment of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Jae Hun KimCenter for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Jeffrey G McDonaldDepartment of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Xiaochun LiDepartment of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. Electronic address: xiaochun.li@utsouthwestern.edu.
Chia-Hsueh LeeDepartment of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. Electronic address: chiahsueh.lee@stjude.org.
St. Jude Children's Research Hospital · USThe University of Texas Southwestern Medical Center · USTechnische Universität Berlin · DE

Funding

Tissue Culture & Antibody Production CoreP01HL160487 · NHLBI · UT SOUTHWESTERN MEDICAL CENTER · PI Helen Haskell Hobbs · 2022 to 2026
$14.9M
UT Southwestern NORCP30DK127984 · NIDDK · UT SOUTHWESTERN MEDICAL CENTER · PI Jeff G McDonald · 2022 to 2026
$7.4M
Structural and Functional Studies of Human Serine Palmitoyltransferase ComplexesR01GM143282 · NIGMS · ST. JUDE CHILDREN'S RESEARCH HOSPITAL · PI LEE, CHIA-HSUEH · 2021 to 2025
$1.8M
Structural and Functional investigations of Hedgehog Signaling TransductionR01GM135343 · NIGMS · UT SOUTHWESTERN MEDICAL CENTER · PI LI, XIAOCHUN · 2019 to 2022
$1.2M
NHLBI NIH HHS P01 HL160487NIDDK NIH HHS P30 DK127984NIGMS NIH HHS R01 GM135343NIGMS NIH HHS R01 GM143282
6 · The paper itself

Abstract

Sphingosine-1-phosphate (S1P) is an important signaling sphingolipid that regulates the immune system, angiogenesis, auditory function, and epithelial and endothelial barrier integrity. Spinster homolog 2 (Spns2) is an S1P transporter that exports S1P to initiate lipid signaling cascades. Modulating Spns2 activity can be beneficial in treatments of cancer, inflammation, and immune diseases. However, the transport mechanism of Spns2 and its inhibition remain unclear. Here, we present six cryo-EM structures of human Spns2 in lipid nanodiscs, including two functionally relevant intermediate conformations that link the inward- and outward-facing states, to reveal the structural basis of the S1P transport cycle. Functional analyses suggest that Spns2 exports S1P via facilitated diffusion, a mechanism distinct from other MFS lipid transporters. Finally, we show that the Spns2 inhibitor 16d attenuates the transport activity by locking Spns2 in the inward-facing state. Our work sheds light on Spns2-mediated S1P transport and aids the development of advanced Spns2 inhibitors.

Indexed as

InflammationLysophospholipidsAnion Transport ProteinsHumansSphingosineAnion Transport ProteinsLysophospholipidsSphingosinesphingosine 1-phosphateSpns2 protein, humancryo-EMmajor facilitator superfamilyS1PsphingolipidSpns2uniporter

Identifiers

PMID37224812
PMCPMC10330195
OpenAlexW4377694932

What OpenQuestion holds

Textmetadata
LicenceTDM
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.