Abstract:
:There is accumulating evidence that oxidative stress plays an important role in aging. Our previous phosphoproteomic study of the human neuroblastoma cell line SH-SY5Y revealed changes in the phosphorylation of several proteins such as lamin A/C during 6-hydroxydopamine-induced oxidative stress. The present study employed native proteomic analysis to clarify protein-protein interaction under physiological conditions. We examined oxidative stress-related changes in SH-SY5Y cellular proteins using blue-native polyacrylamide gel electrophoresis (BN-PAGE), a powerful tool for the separation of protein complexes. BN-PAGE gel images showed successful separation of several complexes. Components of these complexes, separated by 2-D BN-PAGE in combination with SDS-PAGE, were identified by peptide mass fingerprinting employing MALDI-TOF MS and an MS/MS ion search on LC-MS/MS. TCP-1 complex, ATP synthase, and the complex of heat shock protein 90 with its client proteins such as pyruvate kinase were detected. Two dimensional BN-PAGE and Western blot analysis revealed an increase of lamin A/C associated with heat shock protein 90 in response to 6-OHDA-induced oxidative stress.
journal_name
Exp Gerontoljournal_title
Experimental gerontologyauthors
Nakamura M,Morisawa H,Imajoh-Ohmi S,Takamura C,Fukuda H,Toda Tdoi
10.1016/j.exger.2009.02.009subject
Has Abstractpub_date
2009-06-01 00:00:00pages
375-82issue
6-7eissn
0531-5565issn
1873-6815pii
S0531-5565(09)00033-3journal_volume
44pub_type
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