Abstract:
:Calreticulin isolated from spinach leaves has been specifically phosphorylated in vitro by protein kinase CK2 while animal calreticulin from rabbit liver is not a substrate of this kinase under the same conditions. Phosphoserine is the only phosphoamino acid detected. High affinity binding (Km = 4.4 microM) and a nearly stoichiometric incorporation of phosphate was determined. Partially purified spinach calreticulin is phosphorylated at the same site(s) by a copurifying protein kinase sharing biochemical properties very similar if not identical to those of mammalian CK2. Other plant calreticulins isolated from Liriodendron tulipifera appear to be also phosphorylated by CK2.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Baldan B,Navazio L,Friso A,Mariani P,Meggio Fdoi
10.1006/bbrc.1996.0625subject
Has Abstractpub_date
1996-04-25 00:00:00pages
498-502issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(96)90625-7journal_volume
221pub_type
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