Cited by 24Metabolism and Genetic DisordersDrug Transport and Resistance MechanismsPeroxisome Proliferator-Activated Receptors

Structure-Function Analysis of Peroxisomal ATP-binding Cassette Transporters Using Chimeric Dimers

Open access
Geillon, Flore, Gondcaille, Catherine, Charbonnier, Soëli, Van Roermund, Carlo W., Lopez, Tatiana E., Dias, Alexandre M.M., Pais de Barros, Jean-Paul, Arnould, Christine +3 more·2014·Journal of Biological Chemistry

Abstract

ABCD1 and ABCD2 are two closely related ATP-binding cassette half-transporters predicted to homodimerize and form peroxisomal importers for fatty acyl-CoAs. Available evidence has shown that ABCD1 and ABCD2 display a distinct but overlapping substrate specificity, although much remains to be learned in this respect as well as in their capability to form functional heterodimers. Using a cell model expressing an ABCD2-EGFP fusion protein, we first demonstrated by proximity ligation assay and co-immunoprecipitation assay that ABCD1 interacts with ABCD2. Next, we tested in the pxa1/pxa2Δ yeast mutant the functionality of ABCD1/ABCD2 dimers by expressing chimeric proteins mimicking homo- or heterodimers. For further structure-function analysis of ABCD1/ABCD2 dimers, we expressed chimeric dimers fused to enhanced GFP in human skin fibroblasts of X-linked adrenoleukodystrophy patients. These cells are devoid of ABCD1 and accumulate very long-chain fatty acids (C26:0 and C26:1). We checked that the chimeric proteins were correctly expressed and targeted to the peroxisomes. Very long-chain fatty acid levels were partially restored in transfected X-linked adrenoleukodystrophy fibroblasts regardless of the chimeric construct used, thus demonstrating functionality of both homo- and heterodimers. Interestingly, the level of C24:6 n-3, the immediate precursor of docosahexaenoic acid, was decreased in cells expressing chimeric proteins containing at least one ABCD2 moiety. Our data demonstrate for the first time that both homo- and heterodimers of ABCD1 and ABCD2 are functionally active. Interestingly, the role of ABCD2 (in homo- and heterodimeric forms) in the metabolism of polyunsaturated fatty acids is clearly evidenced, and the chimeric dimers provide a novel tool to study substrate specificity of peroxisomal ATP-binding cassette transporters.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m114.575506

Cites

51 of 51 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Geillon, F., Gondcaille, C., Charbonnier, S., Van Roermund, C. W., Lopez, T. E., Dias, A. M. M., Pais de Barros, J.-P., Arnould, C., Wanders, R. J., Trompier, D., & Savary, S.
Affiliations
  • Université de Bourgogne (FR)
  • Centre National de la Recherche Scientifique (FR)
  • Amsterdam UMC Location University of Amsterdam (NL)
Corresponding author
Savary, Stéphane
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-08
Volume
289
Issue
35
Pages
24511-24520
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1991673143
Cited by
24
References
51
Citations by year
2025: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 5 · 2018: 4 · 2017: 2 · 2016: 5 · 2015: 2
FWCI
2.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • HAL (submittedVersion, cc-by)
  • Pure Amsterdam UMC (submittedVersion)
Funders
Conseil régional de Bourgogne-Franche-Comté
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
ABCD1, ABCD2, heterodimerization, homo- and heterodimers, X-linked adrenoleukodystrophy, very long chain fatty acids, polyunsaturated fatty acid metabolism, substrate specificity, peroxisomes
MeSH terms
Animals, Base Sequence, Cell Line, Humans, Plasmids, Structure-Activity Relationship, Polymerase Chain Reaction, DNA Primers, ATP-Binding Cassette Transporters, Dimerization, Peroxisomes, Mice, Rats

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review