Abstract:
:Ectodomain shedding of membrane receptors and ligands carried out by ADAMs (A disintegrin and metalloprotease) plays a major role in several signaling pathways, including Notch. The grounds of substrate recognition, however, are poorly understood. We demonstrate that a recombinant protein corresponding to the juxtamembrane region of Jagged-1, one of the Notch ligands, behaves as a structured module and is cleaved by ADAM17 catalytic domain at E1054. A short synthetic peptide is cleaved at the same site but at a much higher rate, implying that the structure of the cleavage site in the native protein is a key determinant for substrate recognition. We also show that an Alagille syndrome-associated mutation near E1054 increases the cleavage rate, which suggests that this mutation may lead to an unbalance in Notch signaling due to a higher level of Jagged-1 shedding.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Coglievina M,Guarnaccia C,Zlatev V,Pongor S,Pintar Adoi
10.1016/j.bbrc.2013.02.022subject
Has Abstractpub_date
2013-03-22 00:00:00pages
666-71issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(13)00267-2journal_volume
432pub_type
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