Cited by 102Cellular transport and secretionMicrotubule and mitosis dynamicsAutophagy in Disease and Therapy

Myosin Va bound to phagosomes binds to F-actin and delays microtubule-dependent motility

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Al-Haddad, Ahmed, Shonn, Marion A., Redlich, Bärbel, Blocker, Ariel, Burkhardt, Janis K., Yu, Hanry, Hammer, John A., Weiss, Dieter G. +3 more·2001·Molecular Biology of the Cell

Abstract

We established a light microscopy-based assay that reconstitutes the binding of phagosomes purified from mouse macrophages to preassembled F-actin in vitro. Both endogenous myosin Va from mouse macrophages and exogenous myosin Va from chicken brain stimulated the phagosome-F-actin interaction. Myosin Va association with phagosomes correlated with their ability to bind F-actin in an ATP-regulated manner and antibodies to myosin Va specifically blocked the ATP-sensitive phagosome binding to F-actin. The uptake and retrograde transport of phagosomes from the periphery to the center of cells in bone marrow macrophages was observed in both normal mice and mice homozygous for the dilute-lethal spontaneous mutation (myosin Va null). However, in dilute-lethal macrophages the accumulation of phagosomes in the perinuclear region occurred twofold faster than in normal macrophages. Motion analysis revealed saltatory phagosome movement with temporarily reversed direction in normal macrophages, whereas almost no reversals in direction were observed in dilute-lethal macrophages. These observations demonstrate that myosin Va mediates phagosome binding to F-actin, resulting in a delay in microtubule-dependent retrograde phagosome movement toward the cell center. We propose an "antagonistic/cooperative mechanism" to explain the saltatory phagosome movement toward the cell center in normal macrophages.

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Crossref · 10.1091/mbc.12.9.2742

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Authors
Al-Haddad, A., Shonn, M. A., Redlich, B., Blocker, A., Burkhardt, J. K., Yu, H., Hammer, J. A., Weiss, D. G., Steffen, W., Griffiths, G., & Kuznetsov, S. A.
Affiliations
  • University of Rostock (DE)
  • European Molecular Biology Laboratory (DE)
  • National Institutes of Health (US)
Venue
Molecular Biology of the Cell
Published
2001-09
Volume
12
Issue
9
Pages
2742-2755
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2134178640
Cited by
102
References
56
Citations by year
2026: 3 · 2025: 1 · 2023: 3 · 2022: 6 · 2021: 7 · 2020: 5 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 6
FWCI
2.27
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
US-UK Fulbright Commission
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
myosin Va, phagosome, F-actin binding, retrograde transport, macrophages, ATP regulation, perinuclear accumulation
MeSH terms
Actins, Adenosine Triphosphate, Animals, Brain, Cells, Cultured, Chickens, Cytosol, Macrophages, Mice, Mutant Strains, Microfilament Proteins, Microscopy, Fluorescence, Microspheres, Microtubules, Molecular Weight, Motion, Phagosomes, Phenotype, Protein Binding, Gene Deletion, Myosin Heavy Chains, Myosin Type V, Cell Size, Mice

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