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Li DZ, Duan SG, Yang RN, Yi SC, Liu A, Abdelnabby HE, Wang MQ. BarH1 regulates odorant-binding proteins expression and olfactory perception of Monochamus alternatus Hope. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2022; 140:103677. [PMID: 34763091 DOI: 10.1016/j.ibmb.2021.103677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 10/22/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Insect odorant-binding proteins (OBPs) are a class of small soluble proteins that can be found in various tissues wherein binding and transport of small molecules are required. Thus, OBPs are not only involved in typical olfactory function by specific activities with odorants but also participate in other physiological processes in non-chemosensory tissues. To better understand the complex biological functions of OBPs, it is necessary to study the transcriptional regulation of their expression patterns. In this paper, an apparent gradient expression pattern of Obp19, that was highly and specifically expressed in antennae and played an essential role in the detection of camphene, was defined in the antennae of the Japanese pine sawyer. Further, the transcription factor BarH1, that also presented gradient expression pattern in antennae, was found to regulate expression of Obp19 directly through binding to its upstream DNA sequence. The condition of BarH1 gene silence, the gene expression levels of Obp19 significantly decreased. At the same time, additional olfactory genes also were regulated and thus influence camphene reception. These findings provide us an opportunity to incorporate Obps in the gene regulatory networks of insects, which contribute to a better understanding of the multiplicity and diversity of OBPs and the olfactory mediated behaviors.
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Affiliation(s)
- Dong-Zhen Li
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China; Lab. of Forest Pathogen Integrated Biology, Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing, 100091, PR China
| | - Shuang-Gang Duan
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Rui-Nan Yang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Shan-Cheng Yi
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ao Liu
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Hazem Elewa Abdelnabby
- Department of Plant Protection, Faculty of Agriculture, Benha University, Banha, Qalyubia, 13736, Egypt
| | - Man-Qun Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China.
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Liu MT, Na M, Li Y, Biscoe MR, Ryan K. Conformational Sensing by a Mammalian Olfactory Receptor. Chemistry 2020; 26:11462-11469. [PMID: 32691933 DOI: 10.1002/chem.202001390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/22/2020] [Indexed: 01/08/2023]
Abstract
To identify odors, the mammalian nose deploys hundreds of olfactory receptors (ORs) from the rhodopsin-like class of the G protein-coupled receptor superfamily. Odorants having multiple rotatable bonds present a problem for the stereochemical shape-based matching process assumed to govern the sense of smell through OR-odorant recognition. We conformationally restricted the carbon chain of the odorant octanal to ask whether an OR can respond differently to different odorant conformations. By using calcium imaging to monitor signal transduction in sensory neurons expressing the mouse aldehyde OR, Olfr2, we found that the spatial position of the C7 and C8 carbon atoms of octanal, in relation to its -CHO group, determines whether an aliphatic aldehyde functions as an agonist, partial agonist or antagonist. Our experiments provide evidence that an odorant can manipulate an OR through its intrinsic conformational repertoire, in unexpected analogy to the photon-controlled aldehyde manipulation observed in rhodopsin.
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Affiliation(s)
- Min Ting Liu
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY, 10031, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Mihwa Na
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY, 10031, USA.,Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Yadi Li
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY, 10031, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Mark R Biscoe
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY, 10031, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Kevin Ryan
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY, 10031, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA.,Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
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Slankster E, Kollala S, Baria D, Dailey-Krempel B, Jain R, Odell SR, Mathew D. Mechanism underlying starvation-dependent modulation of olfactory behavior in Drosophila larva. Sci Rep 2020; 10:3119. [PMID: 32080342 PMCID: PMC7033209 DOI: 10.1038/s41598-020-60098-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/05/2020] [Indexed: 12/14/2022] Open
Abstract
Starvation enhances olfactory sensitivity that encourage animals to search for food. The molecular mechanisms that enable sensory neurons to remain flexible and adapt to a particular internal state remain poorly understood. Here, we study the roles of GABA and insulin signaling in starvation-dependent modulation of olfactory sensory neuron (OSN) function in the Drosophila larva. We show that GABAB-receptor and insulin-receptor play important roles during OSN modulation. Using an OSN-specific gene expression analysis, we explore downstream targets of insulin signaling in OSNs. Our results suggest that insulin and GABA signaling pathways interact within OSNs and modulate OSN function by impacting olfactory information processing. We further show that manipulating these signaling pathways specifically in the OSNs impact larval feeding behavior and its body weight. These results challenge the prevailing model of OSN modulation and highlight opportunities to better understand OSN modulation mechanisms and their relationship to animal physiology.
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Affiliation(s)
- Eryn Slankster
- Department of Biology, University of Nevada, Reno, NV, 89557, USA
| | - Sai Kollala
- Department of Biology, University of Nevada, Reno, NV, 89557, USA
| | - Dominique Baria
- Department of Biology, University of Nevada, Reno, NV, 89557, USA
| | | | - Roshni Jain
- Department of Biology, University of Nevada, Reno, NV, 89557, USA
- Cell and Molecular Biology Graduate Program, University of Nevada, Reno, NV, 89557, USA
| | - Seth R Odell
- Department of Biology, University of Nevada, Reno, NV, 89557, USA
- Integrated Neuroscience Graduate Program, University of Nevada, Reno, NV, 89557, USA
| | - Dennis Mathew
- Department of Biology, University of Nevada, Reno, NV, 89557, USA.
- Cell and Molecular Biology Graduate Program, University of Nevada, Reno, NV, 89557, USA.
- Integrated Neuroscience Graduate Program, University of Nevada, Reno, NV, 89557, USA.
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