Cited by 55Cellular transport and secretionAlzheimer's disease research and treatmentsUbiquitin and proteasome pathways

BACE1 Protein Endocytosis and Trafficking Are Differentially Regulated by Ubiquitination at Lysine 501 and the Di-leucine Motif in the Carboxyl Terminus

Open access
Kang, Eugene L., Biscaro, Barbara, Piazza, Fabrizio, Tesco, Giuseppina·2012·Journal of Biological Chemistry

Abstract

β-Site amyloid precursor protein-cleaving enzyme (BACE1) is a membrane-tethered member of the aspartyl proteases that has been identified as β-secretase. BACE1 is targeted through the secretory pathway to the plasma membrane and then is internalized to endosomes. Sorting of membrane proteins to the endosomes and lysosomes is regulated by the interaction of signals present in their carboxyl-terminal fragment with specific trafficking molecules. The BACE1 carboxyl-terminal fragment contains a di-leucine sorting signal ((495)DDISLL(500)) and a ubiquitination site at Lys-501. Here, we report that lack of ubiquitination at Lys-501 (BACE1K501R) does not affect the rate of endocytosis but produces BACE1 stabilization and accumulation of BACE1 in early and late endosomes/lysosomes as well as at the cell membrane. In contrast, the disruption of the di-leucine motif (BACE1LLAA) greatly impairs BACE1 endocytosis and produces a delayed retrograde transport of BACE1 to the trans-Golgi network (TGN) and a delayed delivery of BACE1 to the lysosomes, thus decreasing its degradation. Moreover, the combination of the lack of ubiquitination at Lys-501 and the disruption of the di-leucine motif (BACE1LLAA/KR) produces additive effects on BACE1 stabilization and defective internalization. Finally, BACE1LLAA/KR accumulates in the TGN, while its levels are decreased in EEA1-positive compartments indicating that both ubiquitination at Lys-501 and the di-leucine motif are necessary for the trafficking of BACE1 from the TGN to early endosomes. Our studies have elucidated a differential role for the di-leucine motif and ubiquitination at Lys-501 in BACE1 endocytosis, trafficking, and degradation and suggest the involvement of multiple adaptor molecules.

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.m112.407072

Cites

58 of 58 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?

  • Ubiquitination at lysine 501 in the C-terminus of BACE1 is required for GGA3-mediated lysosomal targeting and degradation of BACE1.

    “Ubiquitination at lysine 501 in the C-terminus of BACE1 is required for GGA3-mediated lysosomal targeting and the degradation of BACE1 (29,30).”

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
Kang, E. L., Biscaro, B., Piazza, F., & Tesco, G.
Affiliations
Tufts University (US)
Corresponding author
Tesco, Giuseppina
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-12
Volume
287
Issue
51
Pages
42867-42880
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1970856104
Cited by
55
References
58
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 9 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 5 · 2018: 4 · 2017: 5 · 2016: 9 · 2014: 7 · 2013: 1
FWCI
1.21
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)
  • BOA (University of Milano-Bicocca) (submittedVersion)
Funders
  • National Institute on Aging (R01AG025952)
  • National Institute of Neurological Disorders and Stroke (P30NS047243)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
BACE1, beta-secretase, ubiquitination, dileucine motif, protein endocytosis, protein trafficking, lysosomal degradation, trans-Golgi network, early endosomes, late endosomes, protein stability, adaptor molecules, Alzheimer's disease
MeSH terms
Amino Acid Sequence, Endocytosis, Enzyme Stability, Humans, Leucine, Lysine, Lysosomes, Models, Biological, Molecular Sequence Data, Protein Processing, Post-Translational, Endosomes, Subcellular Fractions, Aspartic Acid Endopeptidases, Amyloid beta-Protein Precursor, Amino Acid Motifs, Protein Transport, trans-Golgi Network, Amyloid Precursor Protein Secretases, Ubiquitination

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