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TSO1是一种新型蛋白质，可调节拟南芥中的胞质分裂和细胞扩张。

TSO1 is a novel protein that modulates cytokinesis and cell expansion in Arabidopsis.

作者信息

Hauser B A, He J Q, Park S O, Gasser C S

机构信息

Section of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA.

出版信息

Development. 2000 May;127(10):2219-26. doi: 10.1242/dev.127.10.2219.

DOI:10.1242/dev.127.10.2219
PMID:10769245
Abstract

Previous analyses of tso1 mutants revealed a loss of control of directional cellular expansion and coordination of growth of adjacent cells, and defects in karyokinesis and cytokinesis. We isolated TSO1 using a map-based approach, and show that it is a member of a family of at least three genes in Arabidopsis. Consistent with the mutant phenotype, TSO1 transcript was most abundant in flowers, where it accumulated to the highest levels in developing ovules and microspores. The putative TSO1 protein has two cysteine-rich regions that are similar to the CXC domains of a variety of proteins from plants and animals, including a class of kinesins involved in chromosome segregation, and enhancer of zeste-type proteins. Visualization of TSO1-fusion proteins indicated that TSO1 is a nuclear protein. The tso1 mutant phenotypes and the novelty of the TSO1 sequence suggest the existence of previously unknown participants in regulation of directional processes in eukaryotic cells.

摘要

先前对tso1突变体的分析揭示了细胞定向扩张控制的丧失以及相邻细胞生长协调的丧失，还有核分裂和胞质分裂的缺陷。我们采用基于图谱的方法分离出了TSO1，并表明它是拟南芥中一个至少由三个基因组成的家族的成员。与突变体表型一致，TSO1转录本在花中最为丰富，在发育中的胚珠和小孢子中积累到最高水平。推测的TSO1蛋白有两个富含半胱氨酸的区域，与来自植物和动物的多种蛋白质的CXC结构域相似，包括一类参与染色体分离的驱动蛋白和类zeste蛋白增强子。TSO1融合蛋白的可视化表明TSO1是一种核蛋白。tso1突变体表型和TSO1序列的新颖性表明在真核细胞定向过程的调控中存在以前未知的参与者。