Role of plant myosins in motile organelles: Is a direct interaction required?  

作　　者：Limor Buchnik Mohamad Abu-Abied Einat Sadot 

机构地区：[1]The Institute of Plant Sciences, The Volcani Center,ARO, PO Box 6, Bet-Dagan 50250, Israel

出　　处：《Journal of Integrative Plant Biology》2015年第1期23-30,共8页植物学报（英文版）

基　　金：a grant from the Israeli Science Foundation (ISF) 401/09

摘　　要：Plant organelles are highly motile, with speed values of 3-71μm/s in cells of land plants and about 20-60 μm/s in characean algal cells. This movement is believed to be important for rapid distribution of materials around the cell, for the plant＇s ability to respond to environmental biotic and abiotic signals and for proper growth. The main machinery that propels motility of organelles within plant cells is based on the actin cytoskeleton and its motor proteins the myosins.Most plants express multiple members of two main classes： myosin VIII and myosin XI. While myosin VIII has been characterized as a slow motor protein, myosins from class XI were found to be the fastest motor proteins known in all kingdoms. Paradoxically, while it was found that myosins from class XI regulate most organelle movement, it is not quite clear how or even if these motor proteins attach to the organelles whose movement they regulate.Plant organelles are highly motile, with speed values of 3-71μm/s in cells of land plants and about 20-60 μm/s in characean algal cells. This movement is believed to be important for rapid distribution of materials around the cell, for the plant＇s ability to respond to environmental biotic and abiotic signals and for proper growth. The main machinery that propels motility of organelles within plant cells is based on the actin cytoskeleton and its motor proteins the myosins.Most plants express multiple members of two main classes： myosin VIII and myosin XI. While myosin VIII has been characterized as a slow motor protein, myosins from class XI were found to be the fastest motor proteins known in all kingdoms. Paradoxically, while it was found that myosins from class XI regulate most organelle movement, it is not quite clear how or even if these motor proteins attach to the organelles whose movement they regulate.

关 键 词：MOTILITY MYOSIN ORGANELLE 

分 类 号：Q942[生物学—植物学]