| Title: | Requirement for Drosophila SNMP1 for rapid activation and termination of pheromone-induced activity |
| Author(s): | Li Z; Ni JD; Huang J; Montell C; |
| Address: | "Department of Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America. Department of Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America; Neuroscience Research Institute and Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California. Neuroscience Research Institute and Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California" |
| DOI: | 10.1371/journal.pgen.1004600 |
| ISSN/ISBN: | 1553-7404 (Electronic) 1553-7390 (Print) 1553-7390 (Linking) |
| Abstract: | "Pheromones are used for conspecific communication by many animals. In Drosophila, the volatile male-specific pheromone 11-cis vaccenyl acetate (cVA) supplies an important signal for gender recognition. Sensing of cVA by the olfactory system depends on multiple components, including an olfactory receptor (OR67d), the co-receptor ORCO, and an odorant binding protein (LUSH). In addition, a CD36 related protein, sensory neuron membrane protein 1 (SNMP1) is also involved in cVA detection. Loss of SNMP1 has been reported to eliminate cVA responsiveness, and to greatly increase spontaneous activity of OR67d-expressing olfactory receptor neurons (ORNs). Here, we found the snmp1(1) mutation did not abolish cVA responsiveness or cause high spontaneous activity. The cVA responses in snmp1 mutants displayed a delayed onset, and took longer to reach peak activity than wild-type. Most strikingly, loss of SNMP1 caused a dramatic delay in signal termination. The profound impairment in signal inactivation accounted for the previously reported 'spontaneous activity,' which represented continuous activation following transient exposure to environmental cVA. We introduced the silk moth receptor (BmOR1) in OR67d ORNs of snmp1(1) flies and found that the ORNs showed slow activation and deactivation kinetics in response to the BmOR1 ligand (bombykol). We expressed the bombykol receptor complex in Xenopus oocytes in the presence or absence of the silk moth SNMP1 (BmSNMP) and found that addition of BmSNMP accelerated receptor activation and deactivation. Our results thus clarify SNMP1 as an important player required for the rapid kinetics of the pheromone response in insects" |
| Keywords: | "Action Potentials/drug effects Animals Behavior, Animal/drug effects Drosophila/*physiology Female Male Membrane Proteins/genetics/*metabolism Mutation Nerve Tissue Proteins/genetics/*metabolism Oleic Acids/administration & dosage Olfactory Receptor Neuro;Neuroscience;" |
| Notes: | "MedlineLi, Zhengzheng Ni, Jinfei D Huang, Jia Montell, Craig eng R01 DC007864/DC/NIDCD NIH HHS/ R01 GM085335/GM/NIGMS NIH HHS/ GM085335/GM/NIGMS NIH HHS/ DC007864/DC/NIDCD NIH HHS/ Research Support, N.I.H., Extramural 2014/09/26 PLoS Genet. 2014 Sep 25; 10(9):e1004600. doi: 10.1371/journal.pgen.1004600. eCollection 2014 Sep" |
