title: Eleven new putative aminergic G-protein coupled receptors from Amphioxus (Branchiostoma floridae): identification, sequence analysis and phylogenetic relationship.
abstract: We have identified eleven novel aminergic-like G-protein coupled receptor (GPCRs) sequences (named AmphiAmR1-11) by searching the genomic trace sequence database for the amphioxus species, Branchiostoma floridae. They share many of the structural motifs that have been used to characterize vertebrate and invertebrate aminergic GPCRs. A preliminary classification of these receptors has been carried out using both BLAST and Hidden Markov Model analyses. The amphioxus genome appears to express a number of D1-like dopamine receptor sequences, including one related to insect dopamine receptors. It also expresses a number of receptors that resemble invertebrate octopamine/tyramine receptors and others that resemble vertebrate alpha-adrenergic receptors. Amphioxus also expresses receptors that resemble vertebrate histamine receptors. Several of the novel receptor sequences have been identified in amphioxus cDNA libraries from a number of tissues.
authors.affiliation: The Inositide Laboratory, The Babraham Institute, Cambridge, UK.
authors.forename: Chloe
authors.initials: C
authors.lastname: Burman
authors.forename: Braudel
authors.initials: B
authors.lastname: Maqueira
authors.forename: John
authors.initials: J
authors.lastname: Coadwell
authors.forename: Peter D
authors.initials: PD
authors.lastname: Evans
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002816:Chordata, Nonvertebrate / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D043562:Receptors, G-Protein-Coupled / Q000235:genetics*; D017386:Sequence Homology, Amino Acid
chemical_list: D043562:Receptors, G-Protein-Coupled