| The auxin-binding protein 1 is essential for the control of cell cycle. | |
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MedLine Citation:
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PMID: 17376160 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The phytohormone auxin has been known for >50 years to be required for entry into the cell cycle. Despite the critical effects exerted by auxin on the control of cell division, the molecular mechanism by which auxin controls this pathway is poorly understood, and how auxin is perceived upstream of any change in the cell cycle is unknown. Auxin Binding Protein 1 (ABP1) is considered to be a candidate auxin receptor, triggering early modification of ion fluxes across the plasma membrane in response to auxin. ABP1 has also been proposed to mediate auxin-dependent cell expansion, and is essential for early embryonic development. We investigated whether ABP1 has a role in the cell cycle. Functional inactivation of ABP1 in the model plant cell system BY2 was achieved through cellular immunization via the conditional expression of a single-chain fragment variable (scFv). This scFv was derived from a well characterized anti-ABP1 monoclonal antibody previously shown to block the activity of the protein. We demonstrate that functional inactivation of ABP1 results in cell-cycle arrest, and provide evidence that ABP1 plays a critical role in regulation of the cell cycle by acting at both the G1/S and G2/M checkpoints. We conclude that ABP1 is essential for the auxin control of cell division and is likely to constitute the first step of the auxin-signalling pathway mediating auxin effects on the cell cycle. |
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Authors:
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Karine M David; Daniel Couch; Nils Braun; Spencer Brown; Jeanne Grosclaude; Catherine Perrot-Rechenmann |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-03-21 |
Journal Detail:
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Title: The Plant journal : for cell and molecular biology Volume: 50 ISSN: 0960-7412 ISO Abbreviation: Plant J. Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-04-20 Completed Date: 2007-08-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9207397 Medline TA: Plant J Country: England |
Other Details:
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Languages: eng Pagination: 197-206 Citation Subset: IM |
Affiliation:
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Institut des Sciences du Végétal, CNRS, 91198 Gif sur Yvette, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cell Cycle / physiology* Cell Division / physiology Cells, Cultured Flow Cytometry G1 Phase / physiology G2 Phase / physiology Immunoglobulin Variable Region / genetics, immunology, metabolism Immunoprecipitation Mice Plant Proteins / immunology, metabolism, physiology* Plants, Genetically Modified Protein Binding Receptors, Cell Surface / immunology, metabolism, physiology* Surface Plasmon Resonance Tobacco / cytology, genetics, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Immunoglobulin Variable Region; 0/Plant Proteins; 0/Receptors, Cell Surface; 0/auxin-binding protein 1 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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