Intermediate Filament Disassembly in Cultured Dorsal Root Ganglion Neurons Is Associated with Amino‐Terminal Head Domain Phosphorylation of Specific Subunits
Intermediate Filament Disassembly in Cultured Dorsal Root Ganglion Neurons Is Associated with Amino‐Terminal Head Domain Phosphorylation of Specific Subunits
复制标题
培养的背根神经节神经元的中间丝分解与特定亚基的氨基末端头域磷酸化有关
DOI:
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发表时间:
1998
影响因子:
4.7
通讯作者:
W. Mushynski
中科院分区:
文献类型:
--
作者:
Benoit I. Giasson;W. Mushynski
Abstract: We previously reported that activation of protein kinase A in cultured rat dorsal root ganglion neurons, treated concomitantly with low concentrations of okadaic acid that selectively inhibit protein phosphatase‐2A, enhanced the Triton X‐100 solubility of neurofilament triplet proteins. We now show that peripherin and α‐internexin follow the same fragmentation profile as the neurofilament subunits, consistent with the notion that all five cytoplasmic intermediate filament proteins in these neurons form an integrated filamentous network whose assembly can be modulated by protein kinase A. Similar to the situation previously observed for the light neurofilament subunit, there was a strong correlation between phosphorylation of the amino‐terminal head domain of peripherin and filament fragmentation. In contrast, insignificant levels of 32P were incorporated into α‐internexin under conditions promoting disassembly, indicating that phosphorylation of this protein is not involved directly in filament fragmentation. The situation for the mid‐sized neurofilament subunit (NFM) was not as clear‐cut. Phosphopeptide mapping of NFM revealed many head and tail domain phosphorylation sites. However, changes in NFM head domain phosphorylation under conditions promoting filament disassembly were not as pronounced as for peripherin.
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DOI:
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发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sihag,RK;Nixon,RA
通讯作者:
Nixon,RA
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sihag,RK;Nixon,RA
通讯作者:
Nixon,RA
影响因子:
2.9
作者:
Lischwe,MA;Ochs,D
通讯作者:
Ochs,D
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sihag,RK;Nixon,RA
通讯作者:
Nixon,RA
影响因子:
2.9
作者:
Tokutake,S;Hutchison,SB;Pachter,JS;Liem,RK
通讯作者:
Liem,RK