Abstract:
:Thioredoxin (TRX) is one of major components of thiol reducing systems. To investigate the molecular mechanism of TRX function in the lung tissue, we screened a human lung epithelial cell cDNA library for TRX-binding protein by yeast two-hybrid systems. We isolated a plasmid containing C-propeptide region of human pro alpha 1 type 1 collagen (CP-pro alpha 1(1)). CP-pro alpha 1(1) stably binds to wild type TRX but not to mutant TRX, in which redox-active cysteine residues are substituted. Failure of the interaction of mutant TRX with CP-pro alpha 1(1) was confirmed in yeast two-hybrid systems. The CP-pro alpha 1(1)/TRX interaction was increased by dithiothreitol treatment, but was markedly inhibited by hydrogen peroxide or diamide treatment. These data showed that the reducing status of TRX active site cysteine residues is important for the TRX-CP-pro alpha 1(1) interaction, indicating that collagen biosynthesis is under the regulation of TRX-dependent redox control.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Matsumoto K,Masutani H,Nishiyama A,Hashimoto S,Gon Y,Horie T,Yodoi Jdoi
10.1016/s0006-291x(02)00727-1subject
Has Abstractpub_date
2002-07-19 00:00:00pages
663-7issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(02)00727-1journal_volume
295pub_type
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