Apical localization of PMCA2w/b is lipid raft-dependent.
Apical localization of PMCA2w/b is lipid raft-dependent.
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PMCA2w/b 的顶端定位依赖于脂筏。
DOI:
10.1016/j.bbrc.2009.04.044
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发表时间:
2009
影响因子:
3.1
通讯作者:
Strehler,EmanuelE
中科院分区:
文献类型:
--
作者:
Xiong,Yuning;Antalffy,Géza;Enyedi,Agnes;Strehler,EmanuelE
Alternative splicing of the first intracellular loop differentially targets plasma membrane calcium ATPase (PMCA) isoform 2 to the apical or basolateral membrane in MDCK cells. To determine if the targeting is affected by lipid interactions, we stably expressed PMCA2w/b and PMCA2z/b in MDCK cells, and analyzed the PMCA distribution by confocal fluorescence microscopy and membrane fractionation. PMCA2w/b showed clear apical and lateral distribution, whereas PMCA2z/b was mainly localized to the basolateral membrane. A significant fraction of PMCA2w/b partitioned into low-density membranes associated with lipid rafts. Depletion of membrane cholesterol by methyl-β-cyclodextrin resulted in reduced lipid raft association and a striking loss of PMCA2w/b from the apical membrane, whereas the lateral localization of PMCA2z/b remained unchanged. Our data indicate that alternative splicing differentially affects the lipid interactions of PMCA2w/b and PMCA2z/b and that the apical localization of PMCA2w/b is lipid raft-dependent and sensitive to cholesterol depletion.
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DOI:
10.1042/bj3570011
发表时间:
2001
期刊:
The Biochemical journal
影响因子:
--
作者:
K. Prydz;K. Simons
通讯作者:
K. Simons
影响因子:
4.8
作者:
F. Pinto;H. P. Adamo
通讯作者:
H. P. Adamo
影响因子:
4
作者:
Pang, S;Urquhart, P;Hooper, NM
通讯作者:
Hooper, NM
影响因子:
2.9
作者:
Stauffer, TP;Guerini, D;Carafoli, E
通讯作者:
Carafoli, E
影响因子:
3.3
作者:
Lipardi, C;Nitsch, L;Zurzolo, C
通讯作者:
Zurzolo, C