ArticleThe Plant cell2004
The Arabidopsis microtubule-associated protein AtMAP65-1: molecular analysis of its microtubule bundling activity.
Article in The Plant cell, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers.
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Who cites it
89 citing papers in PubMed, 212 citations in OpenAlex.
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- Arabidopsis α-Aurora kinase plays a role in cytokinesis through regulating MAP65-3 association with microtubules at phragmoplast midzone.Nature communications · 2024Article
- The microtubule-nucleating factor MACERATOR tethers AUGMIN7 to microtubules and governs phragmoplast architecture.The Plant cell · 2024Article
- Comprehensive analyses of microtubule-associated protein MAP65 family genes in Cucurbitaceae and CsaMAP65s expression profiles in cucumber.Journal of applied genetics · 2023Article
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- Protein subcellular localization and functional studies in horticultural research: problems, solutions, and new approaches.Horticulture research · 2023Article
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- Cell biology of primary cell wall synthesis in plants.The Plant cell · 2022Review
- Microtubule organization changes severely after mannitol and n-butanol treatments inducing microspore embryogenesis in bread wheat.BMC plant biology · 2021Article
- A novel Actinidia cytorhabdovirus characterized using genomic and viral protein interaction features.Molecular plant pathology · 2021Article
- Analysis of formin functions during cytokinesis using specific inhibitor SMIFH2.Plant physiology · 2021Article
- Visualizing protein-protein interactions in plants by rapamycin-dependent delocalization.The Plant cell · 2021Article
- AtSEC22 Regulates Cell Morphogenesis via Affecting Cytoskeleton Organization and Stabilities.Frontiers in plant science · 2021Article
29 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 4 institutions in 3 countries.
Funding
Abstract
The 65-kD microtubule-associated protein (MAP65) family is a family of plant microtubule-bundling proteins. Functional analysis is complicated by the heterogeneity within this family: there are nine MAP65 genes in Arabidopsis thaliana, AtMAP65-1 to AtMAP65-9. To begin the functional dissection of the Arabidopsis MAP65 proteins, we have concentrated on a single isoform, AtMAP65-1, and examined its effect on the dynamics of mammalian microtubules. We show that recombinant AtMAP65-1 does not promote polymerization and does not stabilize microtubules against cold-induced microtubule depolymerization. However, we show that it does induce microtubule bundling in vitro and that this protein forms 25-nm cross-bridges between microtubules. We further demonstrate that the microtubule binding region resides in the C-terminal half of the protein and that Ala409 and Ala420 are essential for the interaction with microtubules. Ala420 is a conserved amino acid in the AtMAP65 family and is mutated to Val in the cytokinesis-defective mutant pleiade-4 of the AtMAP65-3/PLEIADE gene. We show that AtMAP65-1 can form dimers and that a region in the N terminus is responsible for this activity. Neither the microtubule binding region nor the dimerization region alone could induce microtubule bundling, strongly suggesting that dimerization is necessary to produce the microtubule cross-bridges. In vivo, AtMAP65-1 is ubiquitously expressed both during the cell cycle and in all plant organs and tissues with the exception of anthers and petals. Moreover, using an antiserum raised to AtMAP65-1, we show that AtMAP65-1 binds microtubules at specific stages of the cell cycle.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.