Evidence map›Paper›PMID 33144569›Full record

ArticleNature communications2020

A trimeric Rab7 GEF controls NPC1-dependent lysosomal cholesterol export.

Dick J H van den Boomen, Agata Sienkiewicz, Ilana Berlin, Marlieke L M Jongsma, Daphne M van Elsland, J Paul Luzio, Jacques J C Neefjes, Paul J Lehner

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 2 pooled it
5.8field-weighted citation impact, top 3% 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

58 citing papers in PubMed, 2 syntheses or guidelines pooled it, 100 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review of methods for the determination of cellular cholesterol content: principles, advantages, limitations, applications, and perspectives.Analytical sciences : the international journal of the Japan Society for Analytical Chemistry · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. ESCRTing the RABs through conversion.Biochemical Society transactions · 2025
    Review
  16. Article
  17. Article
  18. Unifying biology of neurodegeneration in lysosomal storage diseases.Journal of inherited metabolic disease · 2025
    Review
  19. Review
  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

8 authors at 2 institutions in 2 countries.

Dick J H van den BoomenCambridge Institute of Therapeutic Immunology & Infectious Disease, University of Cambridge, Cambridge, UK. djhv2@cam.ac.uk.ORCID 0000-0001-6474-3661
Agata SienkiewiczCambridge Institute of Therapeutic Immunology & Infectious Disease, University of Cambridge, Cambridge, UK.
Ilana BerlinLeiden University Medical Centre, Leiden University, Leiden, The Netherlands.
Marlieke L M JongsmaLeiden University Medical Centre, Leiden University, Leiden, The Netherlands.
Daphne M van ElslandLeiden University Medical Centre, Leiden University, Leiden, The Netherlands.
J Paul LuzioCambridge Institute for Medical Research, University of Cambridge, Cambridge, UK.ORCID 0000-0003-3912-9760
Jacques J C NeefjesLeiden University Medical Centre, Leiden University, Leiden, The Netherlands.ORCID 0000-0001-6763-2211
Paul J LehnerCambridge Institute of Therapeutic Immunology & Infectious Disease, University of Cambridge, Cambridge, UK. pjl30@cam.ac.uk.ORCID 0000-0001-9383-1054
Leiden University · NLUniversity of Cambridge · GB

Funding

Medical Research Council MR/R0009015/1Medical Research Council MR/R009015/1Wellcome Trust 084957/Z/08/ZWellcome Trust 100140Wellcome Trust 210688/Z/18/Z
6 · The paper itself

Abstract

Cholesterol import in mammalian cells is mediated by the LDL receptor pathway. Here, we perform a genome-wide CRISPR screen using an endogenous cholesterol reporter and identify >100 genes involved in LDL-cholesterol import. We characterise C18orf8 as a core subunit of the mammalian Mon1-Ccz1 guanidine exchange factor (GEF) for Rab7, required for complex stability and function. C18orf8-deficient cells lack Rab7 activation and show severe defects in late endosome morphology and endosomal LDL trafficking, resulting in cellular cholesterol deficiency. Unexpectedly, free cholesterol accumulates within swollen lysosomes, suggesting a critical defect in lysosomal cholesterol export. We find that active Rab7 interacts with the NPC1 cholesterol transporter and licenses lysosomal cholesterol export. This process is abolished in C18orf8-, Ccz1- and Mon1A/B-deficient cells and restored by a constitutively active Rab7. The trimeric Mon1-Ccz1-C18orf8 (MCC) GEF therefore plays a central role in cellular cholesterol homeostasis coordinating Rab7 activation, endosomal LDL trafficking and NPC1-dependent lysosomal cholesterol export.

Indexed as

Protein MultimerizationBiological TransportCholesterolCholesterol, LDLCRISPR-Cas SystemsEndosomesFluorescent DyesGenome, HumanGuanine Nucleotide Exchange FactorsHEK293 CellsHeLa CellsHomeostasisHumansHydroxymethylglutaryl-CoA SynthaseIntracellular Signaling Peptides and ProteinsLysosomesCholesterolCholesterol, LDLFluorescent DyesGuanine Nucleotide Exchange FactorsHMGCS1 protein, humanHydroxymethylglutaryl-CoA SynthaseIntracellular Signaling Peptides and ProteinsMultiprotein ComplexesNiemann-Pick C1 ProteinNPC1 protein, humanrab7 GTP-Binding Proteinsrab7 GTP-binding proteins, humanrab GTP-Binding Proteins

Identifiers

PMID33144569
PMCPMC7642327
OpenAlexW3096343466

What OpenQuestion holds

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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.