The effects of phospholipids and fatty acids on the oligomer formation of NAP-22
The effects of phospholipids and fatty acids on the oligomer formation of NAP-22
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磷脂和脂肪酸对NAP-22低聚物形成的影响
DOI:
10.1016/j.neulet.2020.135288
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发表时间:
2020
影响因子:
2.5
通讯作者:
Morigaki Kenichi
中科院分区:
文献类型:
--
作者:
Odagaki Sin-Ichi;Maekawa Shohei;Hayashi Fumio;Suzaki Toshinobu;Morigaki Kenichi
Recovery of various signal transduction molecules in the detergent-resistant membrane microdomain (DRM) fraction suggests the importance of this region in cellular functions. NAP-22 (also called BASP1 or CAP-23) is a neuron-enriched calmodulin-binding protein and one of the major proteins in the DRM fraction of the neuronal cell membrane. Previous studies showed tight binding activity of NAP-22 to acidic membrane lipids and the self-interaction of NAP-22, i.e., oligomerization. In this study, the effect of various phospholipids, lysophospholipids and fatty acids on the oligomerization of NAP-22 was studied through SDS-PAGE after chemical cross-linking and electron microscopic observation. High molecular mass oligomers were detected by SDS-PAGE after incubation in solutions containing over 20 mM NaCl at pH 6.5–8.5, even in the absence of lipid addition, and the addition of Ca2+/calmodulin abolished oligomerization. Higher molecular mass oligomer formation after incubation with acidic phospholipids was detected with gradient SDS-PAGE. Much higher mass oligomers were detected in the presence of polyunsaturated fatty acids. Electron microscopic analysis of the samples after SDS treatment showed tangled rope-like structures. Liposome-bound NAP-22 showed small oval or annular structures after cross-linking and SDS treatment. These oligomers were suggested to make the tangled rope-like structures, for annular structures of the same size were observed in the structure. These results suggest the participation of NAP-22 to liquid-liquid phase separation through oligomerization.
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影响因子:
3
作者:
V. V. Zakharov;M. Mosevitsky
通讯作者:
M. Mosevitsky
影响因子:
4.8
作者:
S. Maekawa;H. Murofushi;S. Nakamura
通讯作者:
S. Nakamura
DOI:
10.1016/0167-4781(94)90113-9
发表时间:
1994
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
S. Maekawa;Y. Matsuura;S. Nakamura
通讯作者:
S. Nakamura
影响因子:
4.2
作者:
Akira Terashita;N. Funatsu;M. Umeda;Y. Shimada;Y. Ohno‐Iwashita;R. Epand;S. Maekawa
通讯作者:
S. Maekawa
DOI:
10.1016/s1570-9639(03)00191-2
发表时间:
2003
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
R. Epand;E. Braswell;C. Yip;R. Epand;S. Maekawa
通讯作者:
S. Maekawa