Abstract：
:Reactive oxygen species such as hydrogen peroxide (H(2)O(2)) have taken center stage as bona fide second messengers in various signaling pathways. Here, we report the synthesis, metabolic fate, and effectiveness in modulating such pathways of a Tat-catalase conjugate. Incubation of L2 cells with Tat-catalase greatly increased cell-associated enzymatic activity, reaching close to a plateau by 30 min. The cell-associated catalase activity and antibody-detectable Tat-derivatives declined over time after changing medium, although still remaining at significantly higher levels than baseline even at 4h. While most cell-associated Tat-catalase was apparently tightly attached to the cell surface, a small fraction entered the cells as the proteasome inhibitor MG-132 slightly prevented the disappearance of the enzyme. Tat-catalase, either membrane-bound or intracellular, but not native catalase, inhibited serum-induced Elk phosphorylation and anisomycin- and/or MG-132-induced ERK phosphorylation, suggesting the involvement of H(2)O(2). Thus, Tat-catalase should be a useful tool to dissect H(2)O(2)-dependent events in signaling pathways.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Watanabe N,Iwamoto T,Bowen KD,Dickinson DA,Torres M,Forman HJdoi
10.1016/s0006-291x(03)00335-8subject
Has Abstractpub_date
2003-03-28 00:00:00pages
287-93issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X03003358journal_volume
303pub_type
杂志文章abstract：:COOH-terminal cytoplasmic domains of G protein-coupled receptors (GPCRs) have been shown to carry determinants that control their cell surface localization, internalization, and recycling. In attempts to seek cellular proteins that mediate these processes of PTH/PTH-related protein receptor (PTHR), one of the class B ...
journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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更新日期：2008-01-11 00:00:00
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
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更新日期：2011-02-18 00:00:00
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journal_title：Biochemical and biophysical research communications
pub_type： 杂志文章
doi：10.1016/0006-291x(84)90685-5
更新日期：1984-05-31 00:00:00
