Rattus norvegicus melanocortin 3 receptor: a corrected sequence.
Examination of the Rattus norvegicus genome reveals differences in the melanocortin 3 receptor (MC3R) compared with the published sequence (accession X70667). To clarify these differences, we used RT-PCR to clone MC3R from Sprague Dawley rats. These efforts revealed a sequence for the rat MC3R consistent with that predicted by the rat genome, but different from the published receptor by three amino acids, all of which were located in the predicted second transmembrane domain (TM2). Analysis of these residues revealed that TM2 of the rat MC3R is more homologous with other species than previously considered. The presently described sequence maps onto chromosome 3 of the rat genome, which shows highly conserved synteny with the mouse chromosome 2 and the human chromosome 20. Transient expression revealed high affinity binding of [125I]-NDP-MSH and a concentration-dependent cAMP response to the synthetic agonist MTII. These data both clarify the sequence of the MC3R and demonstrate the great utility of genomic information recently made available.
Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, 3800 Spruce Street, 220E, Philadelphia, PA 19104, USA. derekd@vet.upenn.edu
Derek
D
Daniels
Aae
A
Suzuki
Edan
E
Shapiro
Laiyi
L
Luo
Daniel K
DK
Yee
Steven J
SJ
Fluharty
D000595:Amino Acid Sequence; D000818:Animals; D019556:COS Cells; D002522:Chlorocebus aethiops; D000242:Cyclic AMP / Q000096:biosynthesis; D004284:Dogfish; D006801:Humans; D008297:Male; D051379:Mice; D008969:Molecular Sequence Data; D051381:Rats; D017207:Rats, Sprague-Dawley; D044104:Receptor, Melanocortin, Type 3 / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013552:Swine; D014162:Transfection
D044104:Receptor, Melanocortin, Type 3; D000242:Cyclic AMP