Cited by 92Cellular transport and secretionAutophagy in Disease and TherapyCalcium signaling and nucleotide metabolism

Myotubularin Lipid Phosphatase Binds the hVPS15/hVPS34 Lipid Kinase Complex on Endosomes

Open access
Cao, Canhong, Laporte, Jocelyn, Backer, Jonathan M., Wandinger‐Ness, Angela, Stein, Mary‐Pat·2007·Traffic

Abstract

Myotubularins constitute a ubiquitous family of phosphatidylinositol (PI) 3‐phosphatases implicated in several neuromuscular disorders. Myotubularin [myotubular myopathy 1 (MTM1)] PI 3‐phosphatase is shown associated with early and late endosomes. Loss of endosomal phosphatidylinositol 3‐phosphate [PI(3)P] upon overexpression of wild‐type MTM1, but not a phosphatase‐dead MTM1C375S mutant, resulted in altered early and late endosomal PI(3)P levels and rapid depletion of early endosome antigen‐1. Membrane‐bound MTM1 was directly complexed to the hVPS15/hVPS34 [vacuolar protein sorting (VPS)] PI 3‐kinase complex with binding mediated by the WD40 domain of the hVPS15 (p150) adapter protein and independent of a GRAM‐domain point mutation that blocks PI(3,5)P 2 binding. The WD40 domain of hVPS15 also constitutes the binding site for Rab7 and, as shown previously, contributes to Rab5 binding. In vivo, the hVPS15/hVPS34 PI 3‐kinase complex forms mutually exclusive complexes with the Rab GTPases (Rab5 or Rab7) or with MTM1, suggesting a competitive binding mechanism. Thus, the Rab GTPases together with MTM1 likely serve as molecular switches for controlling the sequential synthesis and degradation of endosomal PI(3)P. Normal levels of endosomal PI(3)P and PI(3,5)P 2 are crucial for both endosomal morphology and function, suggesting that disruption of endosomal sorting and trafficking in skeletal muscle when MTM1 is mutated may be a key factor in precipitating X‐linked MTM.

Integrity signals

Registry

Crossref · 10.1111/j.1600-0854.2007.00586.x

Cites

64 of 64 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • Both mycobacterial phagosomes and chlamydiophorous vacuoles interact with lipid bodies during bacterial dormancy.

    “Both mycobacterial phagosomes and chlamydiophorous vacuoles interact with lipid bodies during bacterial dormancy (50, 51).”

    From Macrophage defense mechanisms against intracellular bacteria (2015) · cites this paper as [51]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Cao, C., Laporte, J., Backer, J. M., Wandinger‐Ness, A., & Stein, M.
Affiliations
  • University of New Mexico (US)
  • Centre National de la Recherche Scientifique (FR)
  • Albert Einstein College of Medicine (US)
  • California State University, Northridge (US)
Corresponding author
Wandinger‐Ness, Angela
Venue
Traffic
Publisher
Wiley
Published
2007-06-05
Volume
8
Issue
8
Pages
1052-1067
ISSN
  • 1398-9219 (ISSN-L)
  • 1600-0854
OpenAlex
W2084440375
Cited by
92
References
64
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 5 · 2018: 2 · 2017: 3 · 2016: 5 · 2015: 3 · 2014: 9 · 2013: 6 · 2012: 12
FWCI
4.28
Type
journal article
Language
en
Open access
Locations
  • Traffic (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • California State University ScholarWorks (system-wide DSpace) (submittedVersion)
  • CSUN ScholarWorks (California State University, Northridge) (submittedVersion)
Funders
  • National Science Foundation
  • American Diabetes Association
  • Institut National de la Santé et de la Recherche Médicale
  • National Institutes of Health (1s10rr014668-01, 5p20rr011830-03, 1s10rr016918-01)
  • National Cancer Institute (R24CA088339, R24CA88339)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK070679, R01DK070679)
  • National Center for Research Resources (P20 RR 11830, S10 RR-016918, S10 RR 14668)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
myotubularin, MTM1, myotubular myopathy, phosphatidylinositol 3-phosphate, PI(3,5)P2, WD40 domain, Rab GTPases, Rab5, Rab7, endosomes, endosomal sorting, endosomal trafficking, X-linked myotubular myopathy, skeletal muscle
MeSH terms
rab7 GTP-Binding Proteins, Animals, Cell Line, Cricetinae, Phosphotransferases, Protein Binding, Endosomes, Protein Tyrosine Phosphatases, rab GTP-Binding Proteins, rab5 GTP-Binding Proteins, Vesicular Transport Proteins, Protein Tyrosine Phosphatases, Non-Receptor

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