Trafficking and Folding Defects in Hereditary Spherocytosis Mutants of the Human Red Cell Anion Exchanger
Trafficking and Folding Defects in Hereditary Spherocytosis Mutants of the Human Red Cell Anion Exchanger
复制标题
人红细胞阴离子交换器遗传性球形红细胞增多症突变体的运输和折叠缺陷
DOI:
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
R. Reithmeier
中科院分区:
文献类型:
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作者:
J. A. Quilty;R. Reithmeier
Hereditary spherocytosis (HS) is a common inherited hemolytic anemia caused by mutations in erythrocyte proteins including the anion exchanger, AE1 (band 3). This study examined seven missense mutations (L707P, R760Q, R760W, R808C, H834P, T837M, and R870W) located in the membrane domain of the human AE1 that are associated with this disease. The HS mutants, constructed in full‐length AE1 cDNA, could be transiently expressed to similar levels in HEK 293 cells. Immunofluorescence, cell surface biotinylation, and pulse chase labeling showed that the HS mutants all exhibited defective cellular trafficking from the endoplasmic reticulum to the plasma membrane. Impaired binding to an inhibitor affinity matrix indicated that the mutant proteins had non‐native structures and may be misfolded. Further characterization of the HS R760Q mutant showed no change in its oligomeric structure or turnover (half‐life=15 h) compared to wild‐type AE1, suggesting the mutant was not aggregated or targeted for rapid degradation via the proteasome. Intracellular retention of HS mutant AE1 would lead to destruction of the protein during erythroid development and would account for the lack of HS mutant AE1 in the plasma membrane of the mature red cell.
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DOI:
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发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Moriyama,R;Ideguchi,H;Lombardo,CR;VanDort,HM;Low,PS
通讯作者:
Low,PS
影响因子:
2.9
作者:
S. J. Yi;Shih-Chun Liu;Laura H. Derick;J. Murray;J. Barker;M. Cho;J. Palek;D. Golan
通讯作者:
S. J. Yi;Shih-Chun Liu;Laura H. Derick;J. Murray;J. Barker;M. Cho;J. Palek;D. Golan
影响因子:
20.3
作者:
A. Rybicki;JJ Qiu;S. Musto;NL Rosen;RL Nagel;RS Schwartz
通讯作者:
A. Rybicki;JJ Qiu;S. Musto;NL Rosen;RL Nagel;RS Schwartz
DOI:
10.1073/pnas.88.24.11022
发表时间:
1991-12-01
影响因子:
11.1
作者:
JAROLIM, P;PALEK, J;LIU, SC
通讯作者:
LIU, SC
DOI:
10.1152/physrev.1999.79.1.s167
发表时间:
1999
期刊:
Physiological reviews.
影响因子:
--
作者:
Kopito,RR
通讯作者:
Kopito,RR