MORI/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast

David Twell; Soon Ki Park; Timothy J. Hawkins; Daniel Schubert; Renate Scmidts; Andre Smertenko; Patrick J. Hussey

doi:10.1038/ncb844

MORI/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast

David Twell, Soon Ki Park, Timothy J. Hawkins, Daniel Schubert, Renate Scmidts, Andre Smertenko, Patrick J. Hussey

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Abstract

MOR1 is a member of the MAP215 family of microtubule-associated proteins and is required to establish interphase arrays of cortical microtubules in plant cells¹. Here we show that MOR1 binds microtubules in vivo, localizing to both cortical microtubules and to areas of overlapping microtubules in the phragmoplast. Genetic complementation of the cytokinesis-defective gemini pollen 1-1 (gem1-1) mutation with MOR1 shows that MOR1 (which is synonymous with the protein GEM1) is essential in cytokinesis. Phenotypic analysis of gem1-1 and gem1-2, which contains a T-DNA insertion, confirm that MOR1/GEM1 is essential for regular patterns of cytokinesis. Both the gem1-1 and gem1-2 mutations cause the truncation of the MOR1/GEM1 protein. In addition, the carboxy-terminal domain of the protein, which is absent in both mutants, binds microtubules in vitro. Our data show that MOR1/GEM1 has an essential role in the cytokinetic phragmoplast.

Original language	English
Pages (from-to)	711-714
Number of pages	4
Journal	Nature Cell Biology
Volume	4
Issue number	9
DOIs	https://doi.org/10.1038/ncb844
State	Published - Sep 2002

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title = "MORI/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast",

abstract = "MOR1 is a member of the MAP215 family of microtubule-associated proteins and is required to establish interphase arrays of cortical microtubules in plant cells1. Here we show that MOR1 binds microtubules in vivo, localizing to both cortical microtubules and to areas of overlapping microtubules in the phragmoplast. Genetic complementation of the cytokinesis-defective gemini pollen 1-1 (gem1-1) mutation with MOR1 shows that MOR1 (which is synonymous with the protein GEM1) is essential in cytokinesis. Phenotypic analysis of gem1-1 and gem1-2, which contains a T-DNA insertion, confirm that MOR1/GEM1 is essential for regular patterns of cytokinesis. Both the gem1-1 and gem1-2 mutations cause the truncation of the MOR1/GEM1 protein. In addition, the carboxy-terminal domain of the protein, which is absent in both mutants, binds microtubules in vitro. Our data show that MOR1/GEM1 has an essential role in the cytokinetic phragmoplast.",

author = "David Twell and Park, {Soon Ki} and Hawkins, {Timothy J.} and Daniel Schubert and Renate Scmidts and Andre Smertenko and Hussey, {Patrick J.}",

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T1 - MORI/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast

AU - Twell, David

AU - Park, Soon Ki

AU - Hawkins, Timothy J.

AU - Schubert, Daniel

AU - Scmidts, Renate

AU - Smertenko, Andre

AU - Hussey, Patrick J.

PY - 2002/9

Y1 - 2002/9

N2 - MOR1 is a member of the MAP215 family of microtubule-associated proteins and is required to establish interphase arrays of cortical microtubules in plant cells1. Here we show that MOR1 binds microtubules in vivo, localizing to both cortical microtubules and to areas of overlapping microtubules in the phragmoplast. Genetic complementation of the cytokinesis-defective gemini pollen 1-1 (gem1-1) mutation with MOR1 shows that MOR1 (which is synonymous with the protein GEM1) is essential in cytokinesis. Phenotypic analysis of gem1-1 and gem1-2, which contains a T-DNA insertion, confirm that MOR1/GEM1 is essential for regular patterns of cytokinesis. Both the gem1-1 and gem1-2 mutations cause the truncation of the MOR1/GEM1 protein. In addition, the carboxy-terminal domain of the protein, which is absent in both mutants, binds microtubules in vitro. Our data show that MOR1/GEM1 has an essential role in the cytokinetic phragmoplast.

AB - MOR1 is a member of the MAP215 family of microtubule-associated proteins and is required to establish interphase arrays of cortical microtubules in plant cells1. Here we show that MOR1 binds microtubules in vivo, localizing to both cortical microtubules and to areas of overlapping microtubules in the phragmoplast. Genetic complementation of the cytokinesis-defective gemini pollen 1-1 (gem1-1) mutation with MOR1 shows that MOR1 (which is synonymous with the protein GEM1) is essential in cytokinesis. Phenotypic analysis of gem1-1 and gem1-2, which contains a T-DNA insertion, confirm that MOR1/GEM1 is essential for regular patterns of cytokinesis. Both the gem1-1 and gem1-2 mutations cause the truncation of the MOR1/GEM1 protein. In addition, the carboxy-terminal domain of the protein, which is absent in both mutants, binds microtubules in vitro. Our data show that MOR1/GEM1 has an essential role in the cytokinetic phragmoplast.

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JF - Nature Cell Biology

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ER -

MORI/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast

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