2015.5.15. 学术沙龙第六十六讲 孙谭霖

2019-09-11 18:06:43 0

题目:Coding of Odors by a Receptor Repertoire

时间: 515日,下午400500

地点:老化学楼东配楼302会议室。

主讲:孙谭霖

摘要:

       We provide a systematic analysis of how odor quality, quantity, and duration are encoded by the odorant receptor repertoire of the Drosophila antenna. We test the receptors with a panel of over 100 odors and find that strong responses are sparse, with response density dependent on chemical class. Individual receptors range along a continuum from narrowly tuned to broadly tuned. Broadly tuned receptors are most sensitive to structurally similar odorants. Strikingly, inhibitory responses are widespread among receptors. The temporal dynamics of the receptor repertoire provide a rich representation of odor quality, quantity, and duration. Receptors with similar odor sensitivity often map to widely dispersed glomeruli in the antennal lobe. We construct a multidimensional odor space based on the responses of each individual receptor and find that the positions of odors depend on their chemical class, concentration, and molecular complexity. The space provides a basis for predicting behavioral responses to odors.

参考文献:

Elissa A. Hallem, John R. Carlson; Coding of Odors by a Receptor Repertoire; Cell, 125(1),143-160.