Redundant and unique roles of coronin proteins in Dictyostelium

Redundant and unique roles of coronin proteins in Dictyostelium
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盘基网柄菌中冠状蛋白的冗余和独特作用

DOI:
10.1007/s00018-010-0455-y
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发表时间:
2011
影响因子:
8
通讯作者:
Noegel
Noegel
中科院分区:
生物学1区
文献类型:
--
作者:
M. C. Müller-Taubenberger;Schleicher;Steinert;Eichinger;Müller;Blau-Wasser;Glöckner;Noegel

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盘状盘齿龙含有一个短冠蛋白(CRN12)和一个长冠蛋白(CRN7),分别由一个和两个β -螺旋桨组成。它们主要存在于细胞皮层,缺乏CRN12 (corA−)或CRN7 (corB−)的细胞在肌动蛋白驱动过程中存在缺陷。我们比较了缺乏CRN12和CRN7的突变细胞系(corA−/corB−)与专注于细胞分裂、吞噬、趋化和发育的单突变细胞系的特征。与单突变菌株相比,ora - /corB -菌株的细胞质分裂、小颗粒摄取和发育缺陷没有增强,而酵母颗粒的运动性和吞噬功能则受到更严重的损害。虽然这两种蛋白质影响相同的过程,但它们的作用方式似乎并不重复。相反,它们经常起拮抗作用,这与它们在肌动蛋白细胞骨架中的作用一致,其中CRN12在肌动蛋白分解中起作用,而CRN7则稳定肌动蛋白丝并保护它们不被分解。
Dictyostelium discoideumharbors a short (CRN12) and a long coronin (CRN7) composed of one and two beta-propellers, respectively. They are primarily present in the cell cortex and cells lacking CRN12 (corA−) or CRN7 (corB−) have defects in actin driven processes. We compared the characteristics of a mutant cell line (corA−/corB−) lacking CRN12 and CRN7 with the single mutants focusing on cytokinesis, phagocytosis, chemotaxis and development. Cytokinesis, uptake of small particles, and developmental defects were not enhanced in thecorA−/corB−strain as compared to the single mutants, whereas motility and phagocytosis of yeast particles were more severely impaired. It appears that although both proteins affect the same processes they do not act in a redundant manner. Rather, they often act antagonistically, which is in accordance with their proposed roles in the actin cytoskeleton where CRN12 acts in actin disassembly whereas CRN7 stabilizes actin filaments and protects them from disassembly.
盘基网柄菌内吞作用的保守特征。
DOI: --
发表时间: 2002
期刊: International Review of Cytology
影响因子: --
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DOI: 10.1016/s0960-9822(97)70093-9
发表时间: 1997-03-01
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针对盘基网柄菌肌动蛋白制备的单克隆抗体:表征及其与肌动蛋白的相互作用
DOI: --
发表时间: 1984
影响因子: 7.8
作者:
P. A. Simpson;J. Spudich;P. Parham
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DOI: 10.1128/iai.71.6.3578-3586.2003
发表时间: 2003-06
影响因子: 3.1
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