Abstract:
:We demonstrate the difference between the follistatin isoforms (FS-288 and FS-315), two activin-binding proteins, in the neutralizing activity for activin signalling. Transcriptional reporter assay using 3TP-Lux, an activin-responsive reporter construct, showed that the inhibitory effect of FS-288 on activin-induced transcriptional response is more potent than that of FS-315. The potency was not influenced by the presence of heparan sulfates, by which FS, in particular FS-288, associates with cell surfaces at a high affinity. Furthermore, FS-288 inhibited the binding of activin to its type II receptor more markedly than did FS-315, as evidenced by surface plasmon resonance and affinity cross-linking experiments. Moreover, the Kd of FS-288 and FS-315 for activin A was estimated to be 46.5+/-0.37 pM and 432+/-26 pM, respectively, by surface plasmon resonance experiments. These results indicate that the different potency between the two FS isoforms in the inhibition of activin activities depends on their affinity for activin A.
journal_name
Cell Signaljournal_title
Cellular signallingauthors
Hashimoto O,Kawasaki N,Tsuchida K,Shimasaki S,Hayakawa T,Sugino Hdoi
10.1016/s0898-6568(00)00099-1subject
Has Abstractpub_date
2000-08-01 00:00:00pages
565-71issue
8eissn
0898-6568issn
1873-3913pii
S0898-6568(00)00099-1journal_volume
12pub_type
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journal_title:Cellular signalling
pub_type: 杂志文章,评审
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journal_title:Cellular signalling
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journal_title:Cellular signalling
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journal_title:Cellular signalling
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