Computational modelling suggests dynamic interactions between Ca2+, IP3 and G protein-coupled modules are key to robust Dictyostelium aggregation.
Computational modelling suggests dynamic interactions between Ca2+, IP3 and G protein-coupled modules are key to robust Dictyostelium aggregation.
复制标题
计算模型表明 Ca2、IP3 和 G 蛋白偶联模块之间的动态相互作用是盘基网柄菌稳健聚集的关键。
DOI:
10.1039/b822074c
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发表时间:
2009
影响因子:
--
通讯作者:
Valeyev NV
中科院分区:
文献类型:
--
作者:
Valeyev NV
Under conditions of starvation, Dictyostelium cells begin a programme of development during which they aggregate to form a multicellular structure by chemotaxis, guided by propagating waves of cyclic AMP that are relayed robustly from cell to cell. In this paper, we develop and analyse a new model for the intracellular and extracellularcAMP dependent processes that regulate Dictyostelium migration. The model allows, for the first time, a quantitative analysis of the dynamic interactions between calcium, IP3 and G protein-dependent modules that are shown to be key to the generation of robust cAMP oscillations in Dictyostelium cells. The model provides a mechanistic explanation for the transient increase in cytosolic free Ca2+ concentration seen in recent experiments with the application of the calmodulin inhibitor calmidazolium (R24571) to Dictyostelium cells, and also allows elucidation of the effects of varying both the conductivity of stretch-activated channels and the concentration of external phosphodiesterase on the oscillatory regime of an individual cell. A rigorous analysis of the robustness of the new model shows that interactions between the different modules significantly reduce the sensitivity of the resulting cAMP oscillations to variations in the kinetics of different Dictyostelium cells, an essential requirement for the generation of the spatially and temporally synchronised chemoattractantcAMP waves that guide Dictyostelium aggregation.
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影响因子:
--
作者:
Valeyev NV
通讯作者:
Valeyev NV
DOI:
10.1083/jcb.110.1.43
发表时间:
1990-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Marks PW;Maxfield FR
通讯作者:
Maxfield FR
DOI:
--
发表时间:
1980
期刊:
Differentiation; research in biological diversity
影响因子:
--
作者:
Albert Goldbeter;Lee A. Segel
通讯作者:
Lee A. Segel
影响因子:
13.6
作者:
Williams,RobinSB;Boeckeler,Katrina;Graf,Ralph;Muller-Taubenberger,Annette;Li,Zhiru;Isberg,RalphR;Wessels,Deborah;Soll,DavidR;Alexander,Hannah;Alexander,Stephen
通讯作者:
Alexander,Stephen
影响因子:
4.1
作者:
BOMINAAR, AA;KESBEKE, F;VANHAASTERT, PJM
通讯作者:
VANHAASTERT, PJM