Journal article
Phragmoplastin dynamics: multiple forms, microtubule association and their roles in cell plate formation in plants
Plant molecular biology, Vol.53(3), pp.297-312
10/2003
Handle:
https://hdl.handle.net/2376/113325
PMID: 14750520
Abstract
We have characterized 4 of the 16 members of the family of dynamin-related proteins (DRP) in Arabidopsis. Three members, DRP1A (previously referred as ADL1), DRP1C and DRP1E, belong to the largest group of phragmoplastin-like proteins. DRP2A (ADL6) is one of the two members that contain a pleckstrin homology (PH) domain and a proline-rich (PR) motif, characteristics of animal dynamins. All four proteins interacted in yeast two-hybrid assays with phragmoplastin, and showed different patterns of localization at the forming cell plate during cytokinesis. GFP-tagged DRP1A and DRP1C proteins were found to be associated with the cytoskeleton in G1 phase of the cell cycle. The distribution pattern of DRP1A was sensitive to propyzamid and insensitive to cytochalasin D, suggesting that DRP1A is associated with microtubules and not actin filaments. The association of DRP1A with microtubules was confirmed in vitro by spin-down assays. A GTPase-defective phragmoplastin acted as a dominant negative mutant, reduced transport of vesicles to the cell plate and formed dense tubule-like structures in the cell plate. We propose that DRP1 proteins may provide an anchor for Golgi-derived vesicles to attach to microtubules, which in turn direct the vesicles to the forming cell plate during cytokinesis. Whereas the DRP1 subfamily members are involved in tubulization of membranes, DRP2 may be involved in endocytosis and membrane recycling via clathrin-coated vesicles.
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Details
- Title
- Phragmoplastin dynamics: multiple forms, microtubule association and their roles in cell plate formation in plants
- Creators
- Zonglie Hong - Department of Molecular Genetics, Department of Plant Biology, and Plant Biotechnology Center Ohio State University, 240 Rightmire Hall 1060 Carmack Road Columbus OH 43210-1002 USAC Geisler-Lee - Department of Molecular Genetics, Department of Plant Biology, and Plant Biotechnology Center Ohio State University, 240 Rightmire Hall 1060 Carmack Road Columbus OH 43210-1002 USAZhongming Zhang - Department of Molecular Genetics, Department of Plant Biology, and Plant Biotechnology Center Ohio State University, 240 Rightmire Hall 1060 Carmack Road Columbus OH 43210-1002 USADesh Verma - Department of Molecular Genetics, Department of Plant Biology, and Plant Biotechnology Center Ohio State University, 240 Rightmire Hall 1060 Carmack Road Columbus OH 43210-1002 USA
- Publication Details
- Plant molecular biology, Vol.53(3), pp.297-312
- Academic Unit
- Center for Reproductive Biology
- Publisher
- Kluwer Academic Publishers; Dordrecht
- Identifiers
- 99900547847101842
- Language
- English
- Resource Type
- Journal article