Abstract:
:Five different receptor subtypes for neuropeptide Y (NPY) have recently been cloned in mammals. We have discovered three distinct subtypes by PCR in the zebrafish, Danio rerio, and describe here one of these called zYc. The protein sequence identity is 46-51% to mammalian subtypes Y1, Y4 and Y6 and to zebrafish Ya, i.e., the same degree of identity as these subtypes display to one another. The identity to zYb is higher, 75%, indicating that zYb and zYc share a more recent ancestor. The zYc receptor binds NPY and PYY (peptide YY) from mammals as well as zebrafish with high affinities and has a Kd of 16 pM for 125I-pPYY. The pharmacological profile is similar to, but distinct-from, mammalian Y1. zYc inhibits cAMP synthesis. This work suggests that NPY has more receptor subtypes than any other peptide that binds to G protein-coupled receptors. Work is in progress to see if the zebrafish receptors are present in mammals.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ringvall M,Berglund MM,Larhammar Ddoi
10.1006/bbrc.1997.7886subject
Has Abstractpub_date
1997-12-29 00:00:00pages
749-55issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(97)97886-4journal_volume
241pub_type
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journal_title:Biochemical and biophysical research communications
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