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Gene Review


Arabidopsis thaliana

Synonyms: GEM1, MICROTUBULE ORGANIZATION 1, T20F21.17, T20F21_17
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High impact information on MOR1

  • RIC1-dependent microtubule organization not only locally inhibits outgrowth but in turn suppresses ROP2 activation in the indentation zones [1].
  • Point mutations that substitute single amino-acid residues in an amino-terminal HEAT repeat impart reversible temperature-dependent cortical microtubule disruption, showing that MOR1 is essential for cortical microtubule organization [2].
  • MOR1 is a member of the MAP215 family of microtubule-associated proteins and is required to establish interphase arrays of cortical microtubules in plant cells [3].
  • 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 [3].
  • Here, we show that itb1 mutants display cell expansion defects similar to those reported for the distorted class of trichome mutants, including disruption of actin and microtubule organization [4].

Biological context of MOR1


Anatomical context of MOR1


Associations of MOR1 with chemical compounds


Other interactions of MOR1


  1. Arabidopsis interdigitating cell growth requires two antagonistic pathways with opposing action on cell morphogenesis. Fu, Y., Gu, Y., Zheng, Z., Wasteneys, G., Yang, Z. Cell (2005) [Pubmed]
  2. MOR1 is essential for organizing cortical microtubules in plants. Whittington, A.T., Vugrek, O., Wei, K.J., Hasenbein, N.G., Sugimoto, K., Rashbrooke, M.C., Wasteneys, G.O. Nature (2001) [Pubmed]
  3. MOR1/GEM1 has an essential role in the plant-specific cytokinetic phragmoplast. Twell, D., Park, S.K., Hawkins, T.J., Schubert, D., Schmidt, R., Smertenko, A., Hussey, P.J. Nat. Cell Biol. (2002) [Pubmed]
  4. IRREGULAR TRICHOME BRANCH1 in Arabidopsis encodes a plant homolog of the actin-related protein2/3 complex activator Scar/WAVE that regulates actin and microtubule organization. Zhang, X., Dyachok, J., Krishnakumar, S., Smith, L.G., Oppenheimer, D.G. Plant Cell (2005) [Pubmed]
  5. Aberrant cell plate formation in the Arabidopsis thaliana microtubule organization 1 mutant. Eleftheriou, E.P., Baskin, T.I., Hepler, P.K. Plant Cell Physiol. (2005) [Pubmed]
  6. Genetic analysis of adventitious root formation with a novel series of temperature-sensitive mutants of Arabidopsis thaliana. Konishi, M., Sugiyama, M. Development (2003) [Pubmed]
  7. TMBP200, a microtubule bundling polypeptide isolated from telophase tobacco BY-2 cells is a MOR1 homologue. Yasuhara, H., Muraoka, M., Shogaki, H., Mori, H., Sonobe, S. Plant Cell Physiol. (2002) [Pubmed]
  8. MICROTUBULE ORGANIZATION 1 regulates structure and function of microtubule arrays during mitosis and cytokinesis in the Arabidopsis root. Kawamura, E., Himmelspach, R., Rashbrooke, M.C., Whittington, A.T., Gale, K.R., Collings, D.A., Wasteneys, G.O. Plant Physiol. (2006) [Pubmed]
  9. Mutation or drug-dependent microtubule disruption causes radial swelling without altering parallel cellulose microfibril deposition in Arabidopsis root cells. Sugimoto, K., Himmelspach, R., Williamson, R.E., Wasteneys, G.O. Plant Cell (2003) [Pubmed]
  10. A kinesin-like protein is essential for oriented deposition of cellulose microfibrils and cell wall strength. Zhong, R., Burk, D.H., Morrison, W.H., Ye, Z.H. Plant Cell (2002) [Pubmed]
  11. Plasma membrane depolarization-activated calcium channels, stimulated by microtubule-depolymerizing drugs in wild-type Arabidopsis thaliana protoplasts, display constitutively large activities and a longer half-life in ton 2 mutant cells affected in the organization of cortical microtubules. Thion, L., Mazars, C., Nacry, P., Bouchez, D., Moreau, M., Ranjeva, R., Thuleau, P. Plant J. (1998) [Pubmed]
  12. Localization of two homologous Arabidopsis kinesin-related proteins in the phragmoplast. Pan, R., Lee, Y.R., Liu, B. Planta (2004) [Pubmed]
  13. Hypersensitivity to cytoskeletal antagonists demonstrates microtubule-microfilament cross-talk in the control of root elongation in Arabidopsis thaliana. Collings, D.A., Lill, A.W., Himmelspach, R., Wasteneys, G.O. New Phytol. (2006) [Pubmed]
  14. A semidominant mutation in an Arabidopsis mitogen-activated protein kinase phosphatase-like gene compromises cortical microtubule organization. Naoi, K., Hashimoto, T. Plant Cell (2004) [Pubmed]
  15. TETRASPORE encodes a kinesin required for male meiotic cytokinesis in Arabidopsis. Yang, C.Y., Spielman, M., Coles, J.P., Li, Y., Ghelani, S., Bourdon, V., Brown, R.C., Lemmon, B.E., Scott, R.J., Dickinson, H.G. Plant J. (2003) [Pubmed]
  16. Brassinosteroids, microtubules and cell elongation in Arabidopsis thaliana. II. Effects of brassinosteroids on microtubules and cell elongation in the bul1 mutant. Catterou, M., Dubois, F., Schaller, H., Aubanelle, L., Vilcot, B., Sangwan-Norreel, B.S., Sangwan, R.S. Planta (2001) [Pubmed]
  17. Salt stress affects cortical microtubule organization and helical growth in Arabidopsis. Shoji, T., Suzuki, K., Abe, T., Kaneko, Y., Shi, H., Zhu, J.K., Rus, A., Hasegawa, P.M., Hashimoto, T. Plant Cell Physiol. (2006) [Pubmed]
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