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Bauer DuMont VL, White SL, Zinshteyn D, Aquadro CF. Molecular population genetics of Sex-lethal ( Sxl) in the Drosophila melanogaster species group: a locus that genetically interacts with Wolbachia pipientis in Drosophila melanogaster. G3 GENES|GENOMES|GENETICS 2021; 11:6296609. [PMID: 34849818 PMCID: PMC8496275 DOI: 10.1093/g3journal/jkab197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 06/01/2021] [Indexed: 11/13/2022]
Abstract
Abstract
Sex-lethal (Sxl) is the sex determination switch in Drosophila, and also plays a critical role in germ-line stem cell daughter differentiation in Drosophila melanogaster. Three female-sterile alleles at Sxl in D. melanogaster were previously shown to genetically interact to varying degrees with the maternally inherited endosymbiont Wolbachia pipientis. Given this genetic interaction and W. pipientis’ ability to manipulate reproduction in Drosophila, we carried out a careful study of both the population genetics (within four Drosophila species) and molecular evolutionary analysis (across 20 Drosophila species) of Sxl. Consistent with earlier studies, we find that selective constraint has played a prominent role in Sxl’s molecular evolution within Drosophila, but we also observe patterns that suggest both episodic bursts of protein evolution and recent positive selection at Sxl. The episodic nature of Sxl’s protein evolution is discussed in light of its genetic interaction with W. pipientis.
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Affiliation(s)
| | - Simone L White
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
| | - Daniel Zinshteyn
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
| | - Charles F Aquadro
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
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Chen MY, Liu HP, Liu CH, Cheng J, Chang MS, Chiang SY, Liao WP, Lin WY. DEHP toxicity on vision, neuromuscular junction, and courtship behaviors of Drosophila. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:1558-1567. [PMID: 30293038 DOI: 10.1016/j.envpol.2018.09.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Bis(2-ethylhexyl) phthalate (DEHP) is the most common plasticizer. Previous studies have shown DEHP treatment accelerates neurological degeneration, suggesting that DEHP may impact retinal sensitivity to light, neurotransmission, and copulation behaviors. Although its neurotoxicity and antifertility properties have been studied, whether DEHP exposure disrupts vision and how DEHP influences neuromuscular junction (NMJ) have not been reported yet. Moreover, the impact of DEHP on insect courtship behavior is still elusive. Fruit flies (Drosophila melanogaster) were treated with series concentrations of DEHP and observed for lifespan, motor function, electroretinogram (ERG), electrophysiology of neuromuscular junction (NMJ), courtship behaviors, and relevant gene expression. Our results confirmed the DEHP toxicity on lifespan and capacity of motor function and updated its effect on copulation behaviors. Additionally, we report for the first time that DEHP exposure may harm vision by affecting the synaptic signaling between the photoreceptor and the laminar neurons. Further, DEHP treatment altered both spontaneous and evoked neurotransmission properties. Noteworthy, the effect of DEHP exposure on the copulation behavior is sex-dependent, and we proposed potential mechanisms for future investigation.
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Affiliation(s)
- Mei-Ying Chen
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan
| | - Hsin-Ping Liu
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan; Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 41354, Taiwan
| | - Chuan-Hsiu Liu
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan
| | - Jack Cheng
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, 40447, Taiwan
| | - Meng-Shiun Chang
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, 40447, Taiwan
| | - Su-Yin Chiang
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan
| | - Wing-Ping Liao
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan.
| | - Wei-Yong Lin
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, 40447, Taiwan; Brain Diseases Research Center, China Medical University, Taichung, 40402, Taiwan.
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Bonilla ML, Todd C, Erlandson M, Andres J. Combining RNA-seq and proteomic profiling to identify seminal fluid proteins in the migratory grasshopper Melanoplus sanguinipes (F). BMC Genomics 2015; 16:1096. [PMID: 26694822 PMCID: PMC4689059 DOI: 10.1186/s12864-015-2327-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 12/15/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Seminal fluid proteins control many aspects of fertilization and in turn, they play a key role in post-mating sexual selection and possibly reproductive isolation. Because effective proteome profiling relies on the availability of high-quality DNA reference databases, our knowledge of these proteins is still largely limited to model organisms with ample genetic resources. New advances in sequencing technology allow for the rapid characterization of transcriptomes at low cost. By combining high throughput RNA-seq and shotgun proteomic profiling, we have characterized the seminal fluid proteins secreted by the primary male accessory gland of the migratory grasshopper (Melanoplus sanguinipes), one of the main agricultural pests in central North America. RESULTS Using RNA sequencing, we characterized the transcripts of ~ 8,100 genes expressed in the long hyaline tubules (LHT) of the accessory glands. Proteomic profiling identified 353 proteins expressed in the long hyaline tubules (LHT). Of special interest are seminal fluid proteins (SFPs), such as EJAC-SP, ACE and prostaglandin synthetases, which are known to regulate female oviposition in insects. CONCLUSIONS Our study provides new insights into the proteomic components of male ejaculate in Orthopterans, and highlights several important patterns. First, the presence of proteins that lack predicted classical secretory tags in accessory gland proteomes is common in male accessory glands. Second, the products of a few highly expressed genes dominate the accessory gland secretions. Third, accessory gland transcriptomes are enriched for novel transcripts. Fourth, there is conservation of SFPs' functional classes across distantly related taxonomic groups with very different life histories, mating systems and sperm transferring mechanisms. The identified SFPs may serve as targets of future efforts to develop species- specific genetic control strategies.
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Affiliation(s)
- Martha L Bonilla
- Facultad de Ciencias Agropecuarias, Universidad Nacional de Colombia, A.237. Palmira, Valle del Cauca, Colombia.
- Department of Biology, University of Saskatchewan, 112 Science Pl., Saskatoon, SK, S7N-5E2, Canada.
| | - Christopher Todd
- Department of Biology, University of Saskatchewan, 112 Science Pl., Saskatoon, SK, S7N-5E2, Canada.
| | - Martin Erlandson
- Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Pl., Saskatoon, SK, S7N-0X2, Canada.
| | - Jose Andres
- Department of Biology, University of Saskatchewan, 112 Science Pl., Saskatoon, SK, S7N-5E2, Canada.
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Sirot LK, Wong A, Chapman T, Wolfner MF. Sexual conflict and seminal fluid proteins: a dynamic landscape of sexual interactions. Cold Spring Harb Perspect Biol 2014; 7:a017533. [PMID: 25502515 DOI: 10.1101/cshperspect.a017533] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Sexual reproduction requires coordinated contributions from both sexes to proceed efficiently. However, the reproductive strategies that the sexes adopt often have the potential to give rise to sexual conflict because they can result in divergent, sex-specific costs and benefits. These conflicts can occur at many levels, from molecular to behavioral. Here, we consider sexual conflict mediated through the actions of seminal fluid proteins. These proteins provide many excellent examples in which to trace the operation of sexual conflict from molecules through to behavior. Seminal fluid proteins are made by males and provided to females during mating. As agents that can modulate egg production at several steps, as well as reproductive behavior, sperm "management," and female feeding, activity, and longevity, the actions of seminal proteins are prime targets for sexual conflict. We review these actions in the context of sexual conflict. We discuss genomic signatures in seminal protein (and related) genes that are consistent with current or previous sexual conflict. Finally, we note promising areas for future study and highlight real-world practical situations that will benefit from understanding the nature of sexual conflicts mediated by seminal proteins.
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Affiliation(s)
- Laura K Sirot
- Department of Biology, College of Wooster, Wooster, Ohio 44691
| | - Alex Wong
- Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada
| | - Tracey Chapman
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Mariana F Wolfner
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York 14853
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