PEX7 and EBP50 target iNOS to the peroxisome in hepatocytes.
PEX7 and EBP50 target iNOS to the peroxisome in hepatocytes.
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DOI:
10.1016/j.niox.2013.02.084
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发表时间:
2013-05-31
期刊:
影响因子:
--
通讯作者:
Billiar TR
中科院分区:
文献类型:
--
作者:
Loughran PA;Stolz DB;Barrick SR;Wheeler DS;Friedman PA;Rachubinski RA;Watkins SC;Billiar TR
iNOS localizes to both the cytosol and peroxisomes in hepatocytes in vitro and in vivo. The structural determinants for iNOS localization are not known. One plausible mechanism for iNOS localization to the peroxisome is through the interaction with peroxisomal import proteins PEX5 or PEX7. siRNA knockdown of PEX7 reduced iNOS colocalization with the peroxisomal protein PMP70. Proteomic studies using MALDI-MS identified iNOS association with the 50-kD ezrin binding PDZ protein (EBP50). Confocal microscopy studies and immunoelectron microscopy confirmed iNOS association with EBP50, with greatest colocalization occurring at 8 hours of cytokine exposure. EBP50 associated with peroxisomes in a PEX5 and PEX7-dependent manner. iNOS localization to peroxisomes was contingent on EBP50 expression in LPS-treated mice. Thus, iNOS targeting to peroxisomes in hepatocytes involves interaction with PEX7 and EBP50. The targeting of iNOS protein to the peroxisome may shift the balance of metabolic processes that rely on heme proteins susceptible to modification by radical oxygen and nitrogen radicals.
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DOI:
10.1083/jcb.127.5.1245
发表时间:
1994-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1084/jem.176.1.261
发表时间:
1992-07-01
期刊:
The Journal of experimental medicine
影响因子:
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作者:
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通讯作者:
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影响因子:
3.5
作者:
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通讯作者:
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DOI:
10.1073/pnas.90.8.3491
发表时间:
1993-04-15
影响因子:
11.1
作者:
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通讯作者:
BILLIAR, TR
DOI:
10.1073/pnas.89.23.11141
发表时间:
1992-12-01
影响因子:
11.1
作者:
MCMILLAN, K;BREDT, DS;MASTERS, BSS
通讯作者:
MASTERS, BSS