Sorting of Two Polytopic Proteins, the γ-Aminobutyric Acid and Betaine Transporters, in Polarized Epithelial Cells*
Sorting of Two Polytopic Proteins, the γ-Aminobutyric Acid and Betaine Transporters, in Polarized Epithelial Cells*
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极化上皮细胞中两种多位蛋白(γ-氨基丁酸和甜菜碱转运蛋白)的分选*
DOI:
10.1074/jbc.272.10.6584
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
G. Pietrini
中科院分区:
文献类型:
--
作者:
C. Perego;A. Bulbarelli;R. Longhi;M. Caimi;A. Villa;M. Caplan;G. Pietrini
The γ-aminobutyric acid transporter (GAT-1) isoform of the γ-aminobutyric acid and the betaine (BGT) transporters exhibit distinct apical and basolateral distributions when introduced into Madin-Darby canine kidney cells (Pietrini, G., Suh, Y. J., Edelman, L., Rudnick, G., and Caplan, M. J. (1994) J. Biol. Chem. 269, 4668-4674). We have investigated the presence of sorting signals in their COOH-terminal cytosolic domains by expression in Madin-Darby canine kidney cells of mutated and chimeric transporters. Whereas truncated GAT-1 (ΔC-GAT) maintained the original functional activity and apical localization, either the removal (ΔC-myc BGT) or the substitution (BGS chimera) of the cytosolic tail of BGT generated proteins that accumulated in the endoplasmic reticulum. Moreover, we have found that the cytosolic tail of BGT redirected apical proteins, the polytopic GAT-1 (GBS chimera) and the monotopic human nerve growth factor receptor, to the basolateral surface. These results suggest the presence of basolateral sorting information in the cytosolic tail of BGT. We have further shown that information necessary for the exit of BGT from the endoplasmic reticulum and for the basolateral localization of the GBS chimera is contained in a short segment, rich in basic residues, within the cytosolic tail of BGT.
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DOI:
10.1073/pnas.87.4.1456
发表时间:
1990
影响因子:
11.1
作者:
Stevens,BR;Fernandez,A;Hirayama,B;Wright,EM;Kempner,ES
通讯作者:
Kempner,ES
影响因子:
56.9
作者:
GUASTELLA, J;NELSON, N;KANNER, BI
通讯作者:
KANNER, BI
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Pietrini,G;Suh,YJ;Edelmann,L;Rudnick,G;Caplan,MJ
通讯作者:
Caplan,MJ
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Thomas,DC;Brewer,CB;Roth,MG
通讯作者:
Roth,MG
影响因子:
11.4
作者:
JACKSON, MR;NILSSON, T;PETERSON, PA
通讯作者:
PETERSON, PA