Abstract:
:S100 proteins are acidic calcium-binding proteins present in high concentration in the brain and at lower concentrations in peripheral tissues. Their function remains to be elucidated in many tissues. In this report we show for the first time that S100 proteins stimulate the bovine photoreceptor membrane guanylate cyclase. The extent of stimulation varied between the different S100 proteins with the S100b exhibiting the highest level of influence. The stimulation by all S100 proteins was calcium dependent, with the half-maximal stimulation occurring at about 35-40 microM calcium. These results suggest that in some cells S100 proteins can mediate calcium signals via cyclic GMP.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Margulis A,Pozdnyakov N,Sitaramayya Adoi
10.1006/bbrc.1996.0043subject
Has Abstractpub_date
1996-01-05 00:00:00pages
243-7issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(96)90043-1journal_volume
218pub_type
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