MAP7 family proteins regulate kinesin-1 recruitment and activation
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Abstract
Kinesin-1 is responsible for microtubule-based transport of numerous cellular cargoes. Here, we explored the regulation of kinesin-1 by MAP7 proteins. We found that all four mammalian MAP7 family members bind to kinesin-1. In HeLa cells, MAP7, MAP7D1, and MAP7D3 act redundantly to enable kinesin-1–dependent transport and microtubule recruitment of the truncated kinesin-1 KIF5B-560, which contains the stalk but not the cargo-binding and autoregulatory regions. In vitro, purified MAP7 and MAP7D3 increase microtubule landing rate and processivity of kinesin-1 through transient association with the motor. MAP7 proteins promote binding of kinesin-1 to microtubules both directly, through the N-terminal microtubule-binding domain and unstructured linker region, and indirectly, through an allosteric effect exerted by the kinesin-binding C-terminal domain. Compared with MAP7, MAP7D3 has a higher affinity for kinesin-1 and a lower affinity for microtubules and, unlike MAP7, can be cotransported with the motor. We propose that MAP7 proteins are microtubule-tethered kinesin-1 activators, with which the motor transiently interacts as it moves along microtubules.
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Distribution of mitochondria throughout the cell is Kinesin-1-dependent, and absence of Kinesin-1 or its activating MAP, MAP7, leads to clustering of mitochondria around the nucleus.
“Distribution of mitochondria throughout the cell is Kinesin-1–dependent and the absence of Kinesin-1 or its activating MAP, MAP7, leads to the clustering of mitochondria around the nucleus.”
From A live-cell marker to visualize the dynamics of stable microtubules throughout the cell cycle (2023) · cites this paper as Hooikaas et al., 2019
The Results section reports that loss of the kinesin-1 motor KIF5B caused mitochondria to cluster around the nucleus in HeLa cells. It also says that loss of MAP7 alone caused no mitochondrial-localization defect; clustering occurred when MAP7, MAP7D1, and MAP7D3 were depleted together. (LLM, conf=0.90)
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- Authors
- Hooikaas, P. J., Martin, M., Mühlethaler, T., Kuijntjes, G.-J., Peeters, C. A. E., Katrukha, E. A., Ferrari, L., Stucchi, R., Verhagen, D. G. F., van Riel, W. E., Grigoriev, I., Altelaar, A. F. M., Hoogenraad, C. C., Rüdiger, S. G. D., Steinmetz, M. O., Kapitein, L. C., & Akhmanova, A.
- Affiliations
- Utrecht University (NL)
- Paul Scherrer Institute (CH)
- Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands 1
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht Institute for Pharmaceutical Sciences and The Netherlands Proteomics Centre, Utrecht University, Utrecht, Netherlands 4
- University of Basel (CH)
- Corresponding author
- Akhmanova, Anna
- ORCID
- Venue
- Journal of Cell Biology
- Publisher
- Rockefeller University Press
- Published
- 2019-02-15
- Volume
- 218
- Issue
- 4
- Pages
- 1298-1318
- ISSN
- 0021-9525 (ISSN-L)
- 1540-8140
- PMC
- PMC6446838
- OpenAlex
- W2913674846
- Cited by
- 166
- References
- 7
- Citations by year
- 2026: 24 · 2025: 25 · 2024: 18 · 2023: 26 · 2022: 19 · 2021: 17 · 2020: 24 · 2019: 13
- FWCI
- 9.59
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- The Journal of Cell Biology (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DORA PSI (Paul Scherrer Institute) (submittedVersion, cc-by)
- Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
- Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
- Funders
- European Research Council (609822)
- Netherlands Organization for Scientific Research (824.15.017)
- Marie Curie
- Swiss National Science Foundation (31003A_166608)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
- Health Sciences › Medicine › Oncology › Cancer Treatment and Pharmacology
- Keywords
- kinesin-1, MAP7, microtubule transport, microtubule binding, allosteric regulation, motor protein regulation, cotransport
- MeSH terms
- Animals, Benzamides, Chlorocebus aethiops, Enzyme Activation, HeLa Cells, Humans, Microtubule-Associated Proteins, Microtubules, Mitochondria, Protein Binding, Kinesins, COS Cells, Protein Transport, Diketopiperazines, Protein Interaction Domains and Motifs, HEK293 Cells
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