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He Y, Cotten ML, Yin J, Yuan Q, Tjandra N. Expression and purification of Drosophila OBP44a with the aids of LC-MS and NMR. Protein Expr Purif 2023; 212:106354. [PMID: 37597794 PMCID: PMC10557525 DOI: 10.1016/j.pep.2023.106354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 08/21/2023]
Abstract
The production of highly purified native soluble proteins in large quantities is crucial for studying protein structure and function. Odorant binding proteins (OBPs) are small, soluble, extracellular proteins with multiple disulfide bonds, whose functions include, but are not limited to, binding hydrophobic molecules and delivering them to their corresponding receptors expressed on insect olfactory receptor neurons. Expression of proteins with multiple disulfide bonds like OBPs usually results in insolubility and low yield, which has been a significant barrier to understanding their biological roles and physiological functions. In the E. coli system, expression of OBPs often results in insoluble inclusion bodies or a limited amount of periplasmic soluble proteins. Although expression of OBPs in eukaryotic systems such as Sf9 insect cells or yeast Pichia pastoris can increase the solubility of the protein, the process remains insufficient. Additionally, monitoring the purity and native apo state of the protein is critical for establishing the correct conformation of the protein. In this study, we employed an E. coli host with an altered intracellular environment to produce cytosolic soluble OBP44a protein, which yielded over 100 mg/L. We monitored the integrity of disulfide bonds throughout the purification process using LC-MS and used NMR to ensure the final product adopted a single conformation. Our study presents an efficient method for obtaining large quantities of soluble proteins in a single conformation, which enables extensive in vitro studies of secreted proteins like OBPs.
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Affiliation(s)
- Yi He
- Fermentation Facility, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Myriam L Cotten
- Department of Applied Science, William & Mary, Williamsburg, VA, USA
| | - Jun Yin
- Dendrite Morphogenesis and Plasticity Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Quan Yuan
- Dendrite Morphogenesis and Plasticity Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Nico Tjandra
- Laboratory of Molecular Biophysics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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2
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Wu D, Wang L, Li W, Li X. Identifying a New Target for BtOBP8: Discovery of a Small Amino Ketone Molecule Containing Benzothiazole Fragments. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:17635-17645. [PMID: 37651643 DOI: 10.1021/acs.jafc.3c02594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Insects rely on odorant-binding proteins (OBPs) for chemical perception, making OBPs a promising target for studying attractants and repellents of pests, such as Bemisia tabaci. However, no reports have reported using B. tabaci OBPs (BtOBPs) as pesticide screening targets. To fill this gap, we obtained BtOBP8 through prokaryotic expression and purification. Then, we confirmed its identity using western blotting and mass spectrometry. Next, we used the sitting drop and hanging drop methods to screen its crystal conditions. Using microscale thermophoresis and isothermal titration calorimetry, we identified the highest affinity ligand, 3l, from 30 compounds. Furthermore, point mutation techniques identified Val119 as a key amino acid residue in binding 31 to BtOBP8. Finally, we tested the bioactivity of B. tabaci Mediterranean and found that 3l more effectively inhibits the bioactivity of B. tabaci MED than imidacloprid. This study presents a new approach for developing green insecticides specific to B. tabaci MED by targeting OBPs. Conclusively, identifying and targeting specific OBPs can create more targeted and effective pest control strategies without relying on toxic chemicals.
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Affiliation(s)
- Danxia Wu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Li Wang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Wei Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Xiangyang Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
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3
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Abendroth JA, Moural TW, Wei H, Zhu F. Roles of insect odorant binding proteins in communication and xenobiotic adaptation. FRONTIERS IN INSECT SCIENCE 2023; 3:1274197. [PMID: 38469469 PMCID: PMC10926425 DOI: 10.3389/finsc.2023.1274197] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/15/2023] [Indexed: 03/13/2024]
Abstract
Odorant binding proteins (OBPs) are small water-soluble proteins mainly associated with olfaction, facilitating the transport of odorant molecules to their relevant receptors in the sensillum lymph. While traditionally considered essential for olfaction, recent research has revealed that OBPs are engaged in a diverse range of physiological functions in modulating chemical communication and defense. Over the past 10 years, emerging evidence suggests that OBPs play vital roles in purifying the perireceptor space from unwanted xenobiotics including plant volatiles and pesticides, potentially facilitating xenobiotic adaptation, such as host location, adaptation, and pesticide resistance. This multifunctionality can be attributed, in part, to their structural variability and effectiveness in transporting, sequestering, and concealing numerous hydrophobic molecules. Here, we firstly overviewed the classification and structural properties of OBPs in diverse insect orders. Subsequently, we discussed the myriad of functional roles of insect OBPs in communication and their adaptation to xenobiotics. By synthesizing the current knowledge in this field, our review paper contributes to a comprehensive understanding of the significance of insect OBPs in chemical ecology, xenobiotic adaptation, paving the way for future research in this fascinating area of study.
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Affiliation(s)
- James A. Abendroth
- Department of Entomology, Pennsylvania State University, University Park, PA, United States
| | - Timothy W. Moural
- Department of Entomology, Pennsylvania State University, University Park, PA, United States
| | - Hongshuang Wei
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Fang Zhu
- Department of Entomology, Pennsylvania State University, University Park, PA, United States
- Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA, United States
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4
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GOBP1 from the Variegated Cutworm Peridroma saucia (Hübner) (Lepidoptera: Noctuidae) Displays High Binding Affinities to the Behavioral Attractant ( Z)-3-Hexenyl acetate. INSECTS 2021; 12:insects12100939. [PMID: 34680708 PMCID: PMC8540349 DOI: 10.3390/insects12100939] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/10/2021] [Accepted: 10/11/2021] [Indexed: 11/17/2022]
Abstract
The variegated cutworm Peridroma saucia (Hübner) is a worldwide pest that causes serious damage to many crops. To recognize sex pheromones and host plant volatiles, insects depend on olfactory chemoreception involving general odorant-binding proteins (GOBPs). In this study, PsauGOBP1 was cloned from the adult antennae of P. saucia. RT-qPCR and Western-blot analysis showed that PsauGOBP1 was specifically and equally expressed in the adult antennae of both females and males. Fluorescence competitive-binding assays with sex pheromones and host plant volatiles demonstrated that PsauGOBP1 bound to six host plant volatiles: (Z)-3-hexenyl acetate (KD = 4.0 ± 0.1 μM), citral (KD = 5.6 ± 0.4 μM), farnesol (KD = 6.4 ± 0.6 μM), nonanal (KD = 6.8 ± 0.3 μM), (Z)-3-hexen-1-ol (KD = 8.5 ± 0.6 μM), and benzaldehyde (KD = 9.4 ± 0.5 μM). Electroantennogram recordings with the six host plant volatiles indicated that (Z)-3-hexenyl acetate elicited the strongest responses from both male and female antennae. Further bioassays using Y-tube olfactometers showed that (Z)-3-hexenyl acetate was attractive to adult P. saucia of both sexes. These results suggest that PsauGOBP1 might be involved in detecting host plant volatiles and that (Z)-3-hexenyl acetate might serve as a potential attractant for the biological control of P. saucia.
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5
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Pan Y, Zhang X, Wang Z, Qi L, Zhang X, Zhang J, Xi J. Identification and analysis of chemosensory genes encoding odorant-binding proteins, chemosensory proteins and sensory neuron membrane proteins in the antennae of Lissorhoptrus oryzophilus. BULLETIN OF ENTOMOLOGICAL RESEARCH 2021; 112:1-11. [PMID: 34588009 DOI: 10.1017/s0007485321000857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is a destructive pest that causes damage to rice crops worldwide. The olfactory system is critical for host or mate location by weevils, but only limited information about the molecular mechanism of olfaction-related behaviour has been reported in this insect. In this study, we conducted SMRT-seq transcriptome analysis and obtained 54,378 transcripts, 38,706 of which were annotated. Based on these annotations, we identified 40 candidate chemosensory genes, including 31 odorant-binding proteins (OBPs), six chemosensory proteins (CSPs) and three sensory neuron membrane proteins (SNMPs). Phylogenetic analysis showed that LoryOBPs, LoryCSPs and LorySNMPs were distributed in various clades. The results of tissue expression patterns indicated that LoryOBPs were highly abundant in the antennae, whereas LoryCSPs were highly abundant not only in the antennae but also in the abdomen, head and wings. Our findings substantially expand the gene database of L. oryzophilus and may serve as a basis for identifying novel targets to disrupt key olfactory genes, potentially providing an eco-friendly strategy to control this pest in the future.
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Affiliation(s)
- Yu Pan
- College of Plant Science, Jilin University, Changchun130062, PR China
| | - Xinxin Zhang
- College of Plant Science, Jilin University, Changchun130062, PR China
- Department of Plant Protection, College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Zhun Wang
- Changchun Customs Technology Center, Changchun, China
| | - Lizhong Qi
- College of Plant Science, Jilin University, Changchun130062, PR China
| | - Xinsheng Zhang
- College of Plant Science, Jilin University, Changchun130062, PR China
| | - Juhong Zhang
- College of Plant Science, Jilin University, Changchun130062, PR China
| | - Jinghui Xi
- College of Plant Science, Jilin University, Changchun130062, PR China
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6
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Thermodynamic Evaluation of the Interactions between Anticancer Pt(II) Complexes and Model Proteins. Molecules 2021; 26:molecules26082376. [PMID: 33921819 PMCID: PMC8072931 DOI: 10.3390/molecules26082376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/30/2021] [Accepted: 04/15/2021] [Indexed: 12/25/2022] Open
Abstract
In this work, we have analysed the binding of the Pt(II) complexes ([PtCl(4′-phenyl-2,2′:6′,2″-terpyridine)](CF3SO3) (1), [PtI(4′-phenyl-2,2′:6′,2″-terpyridine)](CF3SO3) (2) and [PtCl(1,3-di(2-pyridyl)benzene) (3)] with selected model proteins (hen egg-white lysozyme, HEWL, and ribonuclease A, RNase A). Platinum coordination compounds are intensively studied to develop improved anticancer agents. In this regard, a critical issue is the possible role of Pt-protein interactions in their mechanisms of action. Multiple techniques such as differential scanning calorimetry (DSC), electrospray ionization mass spectrometry (ESI-MS) and UV-Vis absorbance titrations were used to enlighten the details of the binding to the different biosubstrates. On the one hand, it may be concluded that the affinity of 3 for the proteins is low. On the other hand, 1 and 2 strongly bind them, but with major binding mode differences when switching from HEWL to RNase A. Both 1 and 2 bind to HEWL with a non-specific (DSC) and non-covalent (ESI-MS) binding mode, dominated by a 1:1 binding stoichiometry (UV-Vis). ESI-MS data indicate a protein-driven chloride loss that does not convert into a covalent bond, likely due to the unfavourable complexes’ geometries and steric hindrance. This result, together with the significant changes of the absorbance profiles of the complex upon interaction, suggest an electrostatic binding mode supported by some stacking interaction of the aromatic ligand. Very differently, in the case of RNase A, slow formation of covalent adducts occurs (DSC, ESI-MS). The reactivity is higher for the iodo-compound 2, in agreement with iodine lability higher than chlorine.
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7
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Diallo S, Shahbaaz M, Makwatta JO, Muema JM, Masiga D, Christofells A, Getahun MN. Antennal Enriched Odorant Binding Proteins Are Required for Odor Communication in Glossina f. fuscipes. Biomolecules 2021; 11:541. [PMID: 33917773 PMCID: PMC8068202 DOI: 10.3390/biom11040541] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 03/31/2021] [Indexed: 02/07/2023] Open
Abstract
Olfaction is orchestrated at different stages and involves various proteins at each step. For example, odorant-binding proteins (OBPs) are soluble proteins found in sensillum lymph that might encounter odorants before reaching the odorant receptors. In tsetse flies, the function of OBPs in olfaction is less understood. Here, we investigated the role of OBPs in Glossina fuscipes fuscipes olfaction, the main vector of sleeping sickness, using multidisciplinary approaches. Our tissue expression study demonstrated that GffLush was conserved in legs and antenna in both sexes, whereas GffObp44 and GffObp69 were expressed in the legs but absent in the antenna. GffObp99 was absent in the female antenna but expressed in the male antenna. Short odorant exposure induced a fast alteration in the transcription of OBP genes. Furthermore, we successfully silenced a specific OBP expressed in the antenna via dsRNAi feeding to decipher its function. We found that silencing OBPs that interact with 1-octen-3-ol significantly abolished flies' attraction to 1-octen-3-ol, a known attractant for tsetse fly. However, OBPs that demonstrated a weak interaction with 1-octen-3-ol did not affect the behavioral response, even though it was successfully silenced. Thus, OBPs' selective interaction with ligands, their expression in the antenna and their significant impact on behavior when silenced demonstrated their direct involvement in olfaction.
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Affiliation(s)
- Souleymane Diallo
- International Centre of Insect Physiology and Ecology (ICIPE), Nairobi P.O. Box 30772-00100, Kenya
- South African Medical Research Council Bioinformatics Unit, South African National Bioinformatics Institute (SANBI), University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
| | - Mohd Shahbaaz
- South African Medical Research Council Bioinformatics Unit, South African National Bioinformatics Institute (SANBI), University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
| | - JohnMark O Makwatta
- International Centre of Insect Physiology and Ecology (ICIPE), Nairobi P.O. Box 30772-00100, Kenya
| | - Jackson M Muema
- International Centre of Insect Physiology and Ecology (ICIPE), Nairobi P.O. Box 30772-00100, Kenya
| | - Daniel Masiga
- International Centre of Insect Physiology and Ecology (ICIPE), Nairobi P.O. Box 30772-00100, Kenya
| | - Alan Christofells
- South African Medical Research Council Bioinformatics Unit, South African National Bioinformatics Institute (SANBI), University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
| | - Merid N Getahun
- International Centre of Insect Physiology and Ecology (ICIPE), Nairobi P.O. Box 30772-00100, Kenya
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8
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Ruiz L, Kaczmarska Z, Gomes T, Aragon E, Torner C, Freier R, Baginski B, Martin-Malpartida P, de Martin Garrido N, Marquez JA, Cordeiro TN, Pluta R, Macias MJ. Unveiling the dimer/monomer propensities of Smad MH1-DNA complexes. Comput Struct Biotechnol J 2021; 19:632-646. [PMID: 33510867 PMCID: PMC7810915 DOI: 10.1016/j.csbj.2020.12.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/29/2020] [Accepted: 12/31/2020] [Indexed: 12/11/2022] Open
Abstract
MH1 domains of BMP-activated Smads populate a dimer-monomer equilibrium. Swapping loop1 between BMP- and TGFβ Smads turns dimers into monomers and vice versa. BMP-responsive genomic regions have a lower average count of motifs than TGFβ ones.
Smad transcription factors are the main downstream effectors of the Transforming growth factor β superfamily (TGFβ) signalling network. The DNA complexes determined here by X-ray crystallography for the Bone Morphogenetic Proteins (BMP) activated Smad5 and Smad8 proteins reveal that all MH1 domains bind [GGC(GC)|(CG)] motifs similarly, although TGFβ-activated Smad2/3 and Smad4 MH1 domains bind as monomers whereas Smad1/5/8 form helix-swapped dimers. Dimers and monomers are also present in solution, as revealed by NMR. To decipher the characteristics that defined these dimers, we designed chimeric MH1 domains and characterized them using X-ray crystallography. We found that swapping the loop1 between TGFβ- and BMP- activated MH1 domains switches the dimer/monomer propensities. When we scanned the distribution of Smad-bound motifs in ChIP-Seq peaks (Chromatin immunoprecipitation followed by high-throughput sequencing) in Smad-responsive genes, we observed specific site clustering and spacing depending on whether the peaks correspond to BMP- or TGFβ-responsive genes. We also identified significant correlations between site distribution and monomer or dimer propensities. We propose that the MH1 monomer or dimer propensity of Smads contributes to the distinct motif selection genome-wide and together with the MH2 domain association, help define the composition of R-Smad/Smad4 trimeric complexes.
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Affiliation(s)
- Lidia Ruiz
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Zuzanna Kaczmarska
- EMBL Grenoble, 71 Avenue des Martyrs, CS 90181, Grenoble Cedex 9 38042, France.,International Institute of Molecular and Cell Biology in Warsaw, Trojdena 4, Warsaw 02-109, Poland
| | - Tiago Gomes
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Eric Aragon
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Carles Torner
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Regina Freier
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Blazej Baginski
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Pau Martin-Malpartida
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Natàlia de Martin Garrido
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - José A Marquez
- EMBL Grenoble, 71 Avenue des Martyrs, CS 90181, Grenoble Cedex 9 38042, France
| | - Tiago N Cordeiro
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB), Universidade NOVA de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Radoslaw Pluta
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Maria J Macias
- Institute for Research in Biomedicine, The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, Barcelona 08028, Spain.,ICREA, Passeig Lluís Companys 23, Barcelona 08010, Spain
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9
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Wu W, Li S, Yang M, Lin Y, Zheng K, Akutse KS. Citronellal perception and transmission by Anopheles gambiae s.s. (Diptera: Culicidae) females. Sci Rep 2020; 10:18615. [PMID: 33122679 PMCID: PMC7596511 DOI: 10.1038/s41598-020-75782-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 10/14/2020] [Indexed: 11/08/2022] Open
Abstract
Anopheles gambiae s.s. is a key vector of Plasmodium parasites. Repellents, which may be a promising alternative to pesticides used to control malaria mosquitoes. Although citronellal is a known mosquito repellent, its repellency characteristics are largely unknown. Determining the specific odorant-binding proteins (OBPs) and odorant receptors (ORs) that detect and transfer the citronellal molecule in A. gambiae s.s. will help to define the mode of action of this compound. In this research, we assessed the repellent activity of citronellal in A. gambiae s.s. using a Y-tube olfactory meter, screened candidate citronellal-binding OBPs and ORs using reverse molecular docking, clarified the binding properties of predicted proteins for citronellal using fluorescence competition binding assay. Results showed that citronellal had a dosage effect on repelling A. gambiae s.s.. The 50% repellent rate was determined to be 4.02 nmol. Results of simulated molecular docking showed that the only proteins that bound tightly with citronellal were AgamOBP4 and AgamORC7. Fluorescence competitive binding assays confirmed the simulations. This research determined that citronellal was captured by AgamOBP4 and transmitted to AgamORC7 in A. gambiae s.s.. Our study will be beneficial in the further understanding the repellent mechanism of citronellal against A. gambiae s.s..
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Affiliation(s)
- Weijian Wu
- Institute of Subtropical Agriculture, Fujian Academy of Agriculture Sciences & Zhangzhou Institute of Technology, Zhangzhou, 363001, China
| | - Shanshan Li
- Institute of Subtropical Agriculture, Fujian Academy of Agriculture Sciences & Zhangzhou Institute of Technology, Zhangzhou, 363001, China
| | - Min Yang
- Institute of Subtropical Agriculture, Fujian Academy of Agriculture Sciences & Zhangzhou Institute of Technology, Zhangzhou, 363001, China
| | - Yongwen Lin
- Institute of Subtropical Agriculture, Fujian Academy of Agriculture Sciences & Zhangzhou Institute of Technology, Zhangzhou, 363001, China.
| | - Kaibin Zheng
- Institute of Subtropical Agriculture, Fujian Academy of Agriculture Sciences & Zhangzhou Institute of Technology, Zhangzhou, 363001, China
| | - Komivi Senyo Akutse
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya
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10
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Abstract
Odorant binding proteins (OBPs) are small proteins, some of which bind odorants with high specificity. OBPs are relatively easy to produce and show a pronounced stability toward thermal and chemical denaturation. This high stability renders OBPs attractive candidates for the development of odorant detections systems. Unfortunately, binding of odorants is not easy to quantify due to lack of spectroscopic signals upon binding. Therefore, a possible approach to detect binding is to employ the shift in thermal or chemical stability upon ligand-protein interaction. Being a rather indirect approach, the experimental setup should be done with care. Here, the experimental results on stability of OBPs are summarized and issues which should be considered when performing stability experiments are discussed.
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Affiliation(s)
- Nadja Hellmann
- Department of Chemistry/Biochemistry, Johannes Gutenberg-University Mainz, Mainz, Germany.
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11
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Zhang F, Merchant A, Zhao Z, Zhang Y, Zhang J, Zhang Q, Wang Q, Zhou X, Li X. Characterization of MaltOBP1, a Minus-C Odorant-Binding Protein, From the Japanese Pine Sawyer Beetle, Monochamus alternatus Hope (Coleoptera: Cerambycidae). Front Physiol 2020; 11:212. [PMID: 32296339 PMCID: PMC7138900 DOI: 10.3389/fphys.2020.00212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 02/24/2020] [Indexed: 11/13/2022] Open
Abstract
Insect Odorant-Binding Proteins (OBPs) play crucial roles in the discrimination, binding and transportation of odorants. Herein, the full-length cDNA sequence of Minus-C OBP1 (MaltOBP1) from the Japanese pine sawyer beetle, Monochamus alternatus, was cloned by 3′ and 5′ RACE-PCR and analyzed. The results showed that MaltOBP1 contains a 435 bp open reading frame (ORF) that encodes 144 amino acids, including a 21-amino acid signal peptide at the N-terminus. The matured MaltOBP1 protein possesses a predicted molecular weight of about 14 kDa and consists of six α-helices, creating an open binding pocket, and two disulfide bridges. Immunoblotting results showed that MaltOBP1 was most highly expressed in antennae in both sexes, followed by wings and legs. Fluorescence assays demonstrated that MaltOBP1 protein exhibited high binding affinity with (R)-(+)-α-pinene, (−)-β-pinene, trans-caryophyllene, (R)-(+)-limonene and (–)-verbenone, which are the main volatile compounds of the pine tree. Our combined results suggest that MaltOBP1 plays a role in host seeking behavior in M. alternatus.
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Affiliation(s)
- Fangmei Zhang
- Henan Provincial South Henan Crop Pest Green Prevention and Control Academician Workstation, Xinyang Agriculture and Forestry University, Xinyang, China.,State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Austin Merchant
- Department of Entomology, University of Kentucky, Lexington, KY, United States
| | - Zhibin Zhao
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Yunhui Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jing Zhang
- Department of Entomology, China Agricultural University, Beijing, China
| | - Qingwen Zhang
- Department of Entomology, China Agricultural University, Beijing, China
| | - Qinghua Wang
- The Key Laboratory of Forest Protection, State Forestry Administration of China, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, China
| | - Xuguo Zhou
- Department of Entomology, University of Kentucky, Lexington, KY, United States
| | - Xiangrui Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.,Department of Entomology, University of Kentucky, Lexington, KY, United States
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12
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Aedes aegypti Odorant Binding Protein 22 selectively binds fatty acids through a conformational change in its C-terminal tail. Sci Rep 2020; 10:3300. [PMID: 32094450 PMCID: PMC7039890 DOI: 10.1038/s41598-020-60242-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 02/10/2020] [Indexed: 12/20/2022] Open
Abstract
Aedes aegypti is the primary vector for transmission of Dengue, Zika and chikungunya viruses. Previously it was shown that Dengue virus infection of the mosquito led to an in increased expression of the odorant binding protein 22 (AeOBP22) within the mosquito salivary gland and that siRNA mediated knockdown of AeOBP22 led to reduced mosquito feeding behaviors. Insect OBPs are implicated in the perception, storage and transport of chemosensory signaling molecules including air-borne odorants and pheromones. AeOBP22 is unusual as it is additionally expressed in multiple tissues, including the antenna, the male reproductive glands and is transferred to females during reproduction, indicating multiple roles in the mosquito life cycle. However, it is unclear what role it plays in these tissues and what ligands it interacts with. Here we present solution and X-ray crystallographic studies that indicate a potential role of AeOBP22 binding to fatty acids, and that the specificity for longer chain fatty acids is regulated by a conformational change in the C-terminal tail that leads to creation of an enlarged binding cavity that enhances binding affinity. This study sheds light onto the native ligands for AeOBP22 and provides insight into its potential functions in different tissues.
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Falchetto M, Ciossani G, Scolari F, Di Cosimo A, Nenci S, Field LM, Mattevi A, Zhou JJ, Gasperi G, Forneris F. Structural and biochemical evaluation of Ceratitis capitata odorant-binding protein 22 affinity for odorants involved in intersex communication. INSECT MOLECULAR BIOLOGY 2019; 28:431-443. [PMID: 30548711 DOI: 10.1111/imb.12559] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In insects, odorant-binding proteins (OBPs) connect the peripheral sensory system to receptors of olfactory organs. Medfly Ceratitis capitata CcapObp22 shows 37% identity and close phylogenetic affinities with Drosophila melanogaster OBP69a/pheromone-binding protein related protein 1. The CcapObp22 gene is transcribed in the antennae and maxillary palps, suggesting an active role in olfaction. Here, we recombinantly produced CcapObp22, obtaining a 13.5 kDa protein capable of binding multiple strongly hydrophobic terpene compounds, including medfly male pheromone components. The highest binding affinity [half maximal effective concentration (EC50) = 0.48 µM] was to (E,E)-α-farnesene, one of the most abundant compounds in the male pheromone blend. This odorant was used in cocrystallization experiments, yielding the structure of CcapOBP22. The monomeric structure shows the typical OBP folding, constituted by six α-helical elements interconnected by three disulphide bridges. A C-terminal seventh α-helix constitutes the wall of a deep, L-shaped hydrophobic cavity. Analysis of the electron density in this cavity suggested trapping of farnesene in the crystal structure, although with partial occupancy. Superposition of the CcapOBP22 structure with related seven-helical OBPs highlights striking similarity in the organization of the C-terminal segment of these proteins. Collectively, our molecular and physiological data on medfly CcapOBP22 suggest its involvement in intersex olfactory communication.
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Affiliation(s)
- M Falchetto
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - G Ciossani
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - F Scolari
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - A Di Cosimo
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - S Nenci
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - L M Field
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - A Mattevi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - J-J Zhou
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - G Gasperi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - F Forneris
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
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Wang J, Gao P, Luo Y, Tao J. Characterization and expression profiling of odorant-binding proteins in Anoplophora glabripennis Motsch. Gene 2019; 693:25-36. [PMID: 30695713 DOI: 10.1016/j.gene.2018.12.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 10/16/2018] [Accepted: 12/27/2018] [Indexed: 11/18/2022]
Abstract
In insects, olfaction plays a critical role in locating hosts, recognizing mates, and selecting oviposition sites. The Asian long-horned beetle (Anoplophora glabripennis Motschulsky) feeds on 43 species of trees in 15 families, but its chemosensory mechanisms are poorly understood. Herein, genes encoding 61 odorant-binding proteins (OBPs) were identified from the published genome and our previous A. glabripennis transcriptomic data. To investigate their physiological functions, we performed expression profiling of all AglaOBPs in the antennae, legs, and maxillary palps of both sexes. Phylogenetic analysis clustered A. glabripennis OBPs into four subgroups, comprising 29 Minus-C OBPs, 15 Antennae-binding proteins (ABPIIs), 10 Classic OBPs, and one Plus-C OBP. 12 AglaOBP genes were expressed specifically in antennae, and AglaOBP3, AglaOBP18, AglaOBP21, AglaOBP33, AglaOBP41, AglaOBP45, and AglaOBP47 were particularly highly expressed in male antennae. These proteins may function in the detection of female sex pheromones. AglaOBP23 and AglaOBP44 were preferentially expressed in maxillary palps. Expression profiling suggests that many OBPs may be involved in olfaction and gustation, in addition to carrying hydrophobic molecules. The AglaOBPs family has acquired functional diversity concurrently with functional constraints, and further investigation could provide insight into the roles of OBPs in chemoreception.
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Affiliation(s)
- Jingzhen Wang
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, PR China
| | - Peng Gao
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, PR China.
| | - Youqing Luo
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, PR China.
| | - Jing Tao
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, PR China.
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15
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Discovery and design of new PI3K inhibitors through pharmacophore-based virtual screening, molecular docking, and binding free energy analysis. Struct Chem 2018. [DOI: 10.1007/s11224-018-1154-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Das De T, Thomas T, Verma S, Singla D, Chauhan C, Srivastava V, Sharma P, Kumari S, Tevatiya S, Rani J, Hasija Y, Pandey KC, Dixit R. A Synergistic Transcriptional Regulation of Olfactory Genes Drives Blood-Feeding Associated Complex Behavioral Responses in the Mosquito Anopheles culicifacies. Front Physiol 2018; 9:577. [PMID: 29875685 PMCID: PMC5974117 DOI: 10.3389/fphys.2018.00577] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 05/01/2018] [Indexed: 02/05/2023] Open
Abstract
Decoding the molecular basis of host seeking and blood feeding behavioral evolution/adaptation in the adult female mosquitoes may provide an opportunity to design new molecular strategy to disrupt human-mosquito interactions. Although there is a great progress in the field of mosquito olfaction and chemo-detection, little is known about the sex-specific evolution of the specialized olfactory system of adult female mosquitoes that enables them to drive and manage the complex blood-feeding associated behavioral responses. A comprehensive RNA-Seq analysis of prior and post blood meal olfactory system of An. culicifacies mosquito revealed a minor but unique change in the nature and regulation of key olfactory genes that may play a pivotal role in managing diverse behavioral responses. Based on age-dependent transcriptional profiling, we further demonstrated that adult female mosquito's chemosensory system gradually learned and matured to drive the host-seeking and blood feeding behavior at the age of 5-6 days. A time scale expression analysis of Odorant Binding Proteins (OBPs) unravels unique association with a late evening to midnight peak biting time. Blood meal-induced switching of unique sets of OBP genes and Odorant Receptors (Ors) expression coincides with the change in the innate physiological status of the mosquitoes. Blood meal follows up experiments further provide enough evidence that how a synergistic and concurrent action of OBPs-Ors may drive "prior and post blood meal" associated complex behavioral events. A dominant expression of two sensory appendages proteins (SAP-1 & SAP2) in the legs of An. culicifacies suggests that this mosquito species may draw an extra advantage of having more sensitive appendages than An. stephensi, an urban malarial vector in the Indian subcontinents. Finally, our molecular modeling analysis predicts crucial amino acid residues for future functional characterization of the sensory appendages proteins which may play a central role in regulating multiple behaviors of An. culicifacies mosquito. SIGNIFICANCE Evolution and adaptation of blood feeding behavior not only favored the reproductive success of adult female mosquitoes but also make them important disease-transmitting vectors. An environmental exposure after emergence may favor the broadly tuned olfactory system of mosquitoes to drive complex behavioral responses. But, how these olfactory derived genetic factors manage female specific "pre and post" blood meal associated complex behavioral responses are not well known. Our findings suggest that a synergistic action of olfactory factors may govern an innate to prime learning strategy to facilitate rapid blood meal acquisition and downstream behavioral activities. A species-specific transcriptional profiling and an in-silico analysis predict that "sensory appendages protein" may be a unique target to design disorientation strategy against the mosquito Anopheles culicifacies.
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Affiliation(s)
- Tanwee Das De
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India.,Department of Biotechnology, Delhi Technological University, Rohini, India
| | - Tina Thomas
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Sonia Verma
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Deepak Singla
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Charu Chauhan
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Vartika Srivastava
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Punita Sharma
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Seena Kumari
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Sanjay Tevatiya
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Jyoti Rani
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
| | - Yasha Hasija
- Department of Biotechnology, Delhi Technological University, Rohini, India
| | - Kailash C Pandey
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India.,Department of Biochemistry, National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Rajnikant Dixit
- Laboratory of Host-Parasite Interaction Studies, National Institute of Malaria Research, Dwarka, India
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17
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He P, Li ZQ, Zhang YF, Chen L, Wang J, Xu L, Zhang YN, He M. Identification of odorant-binding and chemosensory protein genes and the ligand affinity of two of the encoded proteins suggest a complex olfactory perception system in Periplaneta americana. INSECT MOLECULAR BIOLOGY 2017; 26:687-701. [PMID: 28719023 DOI: 10.1111/imb.12328] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The American cockroach (Periplaneta americana) is an urban pest with a precise chemosensory system that helps it achieve complex physiological behaviours, including locating food and mating. However, its chemosensory mechanisms have not been well studied. Here, we identified 71 putative odorant carrier protein genes in P. americana, including 57 new odorant-binding proteins (OBPs) and 11 chemosensory proteins (CSPs). To identify their physiological functions, we investigated their tissue expression patterns in antennae, mouthparts, legs, and the remainder of the body of both sexes, and determined that most of these genes were expressed in chemosensory organs. A phylogenetic tree showed that the putative pheromone-binding proteins of P. americana were in different clades from those of moths. Two genes, PameOBP24 and PameCSP7, were expressed equally in antennae of both sexes and highly expressed amongst the OBPs and CSPs. These genes were expressed in Escherichia coli and the resultant proteins were purified. The binding affinities of 74 common odorant compounds were tested with recombinant PameOBP24 and PameCSP7. Both proteins bound a variety of ligands. Our findings provide a foundation for future research into the chemosensory mechanisms of P. americana and help in identifying potential target genes for managing this pest.
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Affiliation(s)
- P He
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, China
| | - Z-Q Li
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
| | - Y-F Zhang
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - L Chen
- The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, Guizhou Medical University, Guian, Guizhou, China
| | - J Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, China
| | - L Xu
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Y-N Zhang
- College of Life Sciences, Huaibei Normal University, Huaibei, China
| | - M He
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, China
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18
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Renthal R, Manghnani L, Bernal S, Qu Y, Griffith WP, Lohmeyer K, Guerrero FD, Borges LMF, Pérez de León A. The chemosensory appendage proteome of Amblyomma americanum (Acari: Ixodidae) reveals putative odorant-binding and other chemoreception-related proteins. INSECT SCIENCE 2017; 24:730-742. [PMID: 27307202 DOI: 10.1111/1744-7917.12368] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/29/2016] [Indexed: 06/06/2023]
Abstract
Proteomic analyses were done on 2 chemosensory appendages of the lone star tick, Amblyomma americanum. Proteins in the fore tarsi, which contain the olfactory Haller's organ, and in the palps, that include gustatory sensilla, were compared with proteins in the third tarsi. Also, male and female ticks were compared. Proteins were identified by sequence similarity to known proteins, and by 3-dimensional homology modeling. Proteomic data were also compared with organ-specific transcriptomes from the tick Rhipicephalus microplus. The fore tarsi express a lipocalin not found in the third tarsi or palps. The fore tarsi and palps abundantly express 2 proteins, which are similar to insect odorant-binding proteins (OBPs). Compared with insect OBPs, the tick OBP-like sequences lacked the cysteine absent in C-minus OBPs, and 1 tick OBP-like sequence had additional cysteines that were similar to C-plus OBPs. Four proteins similar to the antibiotic protein microplusin were found: 2 exclusively expressed in the fore tarsi and 1 exclusively expressed in the palps. These proteins lack the microplusin copper-binding site, but they are modeled to have a significant internal cavity, potentially a ligand-binding site. Proteins similar to the dust mite allergens Der p7 and Der f 7 were found differentially expressed in female fore tarsi. A protein exclusively expressed in the fore tarsi has similarities to Neto, which is known to be involved in clustering of ionotropic glutamate receptors. These results constitute the first report of OBP-like protein sequences in ticks and point to several research avenues on tick chemosensory reception.
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Affiliation(s)
- Robert Renthal
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA
- Department of Biochemistry, University of Texas Health Science Center, San Antonio, TX, 78229, USA
| | - Leena Manghnani
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Sandra Bernal
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Yanyan Qu
- RCMI Protein Biomarkers Core, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Wendell P Griffith
- RCMI Protein Biomarkers Core, University of Texas at San Antonio, San Antonio, TX, 78249, USA
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Kim Lohmeyer
- USDA-ARS Knipling-Bushland U.S. Livestock Insects Research Laboratory, Veterinary Pest Genomics Center, Kerrville, TX, 78029, USA
| | - Felix D Guerrero
- USDA-ARS Knipling-Bushland U.S. Livestock Insects Research Laboratory, Veterinary Pest Genomics Center, Kerrville, TX, 78029, USA
| | - Lígia M F Borges
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Adalberto Pérez de León
- USDA-ARS Knipling-Bushland U.S. Livestock Insects Research Laboratory, Veterinary Pest Genomics Center, Kerrville, TX, 78029, USA
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19
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Cicconardi F, Di Marino D, Olimpieri PP, Arthofer W, Schlick-Steiner BC, Steiner FM. Chemosensory adaptations of the mountain fly Drosophila nigrosparsa (Insecta: Diptera) through genomics' and structural biology's lenses. Sci Rep 2017; 7:43770. [PMID: 28256589 PMCID: PMC5335605 DOI: 10.1038/srep43770] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 01/30/2017] [Indexed: 01/14/2023] Open
Abstract
Chemoreception is essential for survival. Some chemicals signal the presence of nutrients or toxins, others the proximity of mating partners, competitors, or predators. Chemical signal transduction has therefore been studied in multiple organisms. In Drosophila species, a number of odorant receptor genes and various other types of chemoreceptors were found. Three main gene families encode for membrane receptors and one for globular proteins that shuttle compounds with different degrees of affinity and specificity towards receptors. By sequencing the genome of Drosophila nigrosparsa, a habitat specialist restricted to montane/alpine environment, and combining genomics and structural biology techniques, we characterised odorant, gustatory, ionotropic receptors and odorant binding proteins, annotating 189 loci and modelling the protein structure of two ionotropic receptors and one odorant binding protein. We hypothesise that the D. nigrosparsa genome experienced gene loss and various evolutionary pressures (diversifying positive selection, relaxation, and pseudogenisation), as well as structural modification in the geometry and electrostatic potential of the two ionotropic receptor binding sites. We discuss possible trajectories in chemosensory adaptation processes, possibly enhancing compound affinity and mediating the evolution of more specialized food, and a fine-tuned mechanism of adaptation.
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MESH Headings
- Adaptation, Physiological/genetics
- Animals
- Drosophila/genetics
- Drosophila Proteins/classification
- Drosophila Proteins/genetics
- Genomic Library
- Genomics/methods
- Models, Molecular
- Multigene Family/genetics
- Phylogeny
- Protein Conformation
- Receptors, Cell Surface/classification
- Receptors, Cell Surface/genetics
- Receptors, Ionotropic Glutamate/chemistry
- Receptors, Ionotropic Glutamate/classification
- Receptors, Ionotropic Glutamate/genetics
- Receptors, Odorant/chemistry
- Receptors, Odorant/classification
- Receptors, Odorant/genetics
- Sequence Analysis, DNA/methods
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Affiliation(s)
- Francesco Cicconardi
- Institute of Ecology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - Daniele Di Marino
- Department of Informatics, Institute of Computational Science, University of Italian Switzerland, Lugano, Switzerland
| | | | - Wolfgang Arthofer
- Institute of Ecology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | | | - Florian M. Steiner
- Institute of Ecology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
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20
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Brito NF, Moreira MF, Melo ACA. A look inside odorant-binding proteins in insect chemoreception. JOURNAL OF INSECT PHYSIOLOGY 2016; 95:51-65. [PMID: 27639942 DOI: 10.1016/j.jinsphys.2016.09.008] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 05/14/2023]
Abstract
Detection of chemical signals from the environment through olfaction is an indispensable mechanism for maintaining an insect's life, evoking critical behavioral responses. Among several proteins involved in the olfactory perception process, the odorant binding protein (OBP) has been shown to be essential for a normally functioning olfactory system. This paper discusses the role of OBPs in insect chemoreception. Here, structural aspects, mechanisms of action and binding affinity of such proteins are reviewed, as well as their promising application as molecular targets for the development of new strategies for insect population management and other technological purposes.
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Affiliation(s)
- Nathália F Brito
- Universidade Federal do Rio de Janeiro, Instituto de Química, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Monica F Moreira
- Universidade Federal do Rio de Janeiro, Instituto de Química, 21941-909 Rio de Janeiro, RJ, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, Brazil
| | - Ana C A Melo
- Universidade Federal do Rio de Janeiro, Instituto de Química, 21941-909 Rio de Janeiro, RJ, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, Brazil.
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21
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Campanini EB, de Brito RA. Molecular evolution of Odorant-binding proteins gene family in two closely related Anastrepha fruit flies. BMC Evol Biol 2016; 16:198. [PMID: 27716035 PMCID: PMC5054612 DOI: 10.1186/s12862-016-0775-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 09/28/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Odorant-binding proteins (OBPs) are of great importance for survival and reproduction since they participate in initial steps of the olfactory signal transduction cascade, solubilizing and transporting chemical signals to the olfactory receptors. A comparative analysis of OBPs between closely related species may help explain how these genes evolve and are maintained under natural selection and how differences in these proteins can affect olfactory responses. We studied OBP genes in the closely related species Anastrepha fraterculus and A. obliqua, which have different host preferences, using data from RNA-seq cDNA libraries of head and reproductive tissues from male and female adults, aiming to understand the speciation process occurred between them. RESULTS We identified 23 different OBP sequences from Anastrepha fraterculus and 24 from A. obliqua, which correspond to 20 Drosophila melanogaster OBP genes. Phylogenetic analysis separated Anastrepha OBPs sequences in four branches that represent four subfamilies: classic, minus-C, plus-C and dimer. Both species showed five plus-C members, which is the biggest number found in tephritids until now. We found evidence of positive selection in four genes and at least one duplication event that preceded the speciation of these two species. Inferences on tertiary structures of putative proteins from these genes revealed that at least one positively selected change involves the binding cavity (the odorant binding region) in the plus-C OBP50a. CONCLUSIONS A. fraterculus and A. obliqua have a bigger OBP repertoire than the other tephritids studied, though the total number of Anastrepha OBPs may be larger, since we studied only a limited number of tissues. The contrast of these closely related species reveals that there are several amino acid changes between the homologous genes, which might be related to their host preferences. The plus-C OBP that has one amino acid under positive selection located in the binding cavity may be under a selection pressure to recognize and bind a new odorant. The other positively selected sites found may be involved in important structural and functional changes, especially ones in which site-specific changes would radically change amino acid properties.
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Affiliation(s)
- Emeline Boni Campanini
- Department of Genetics and Evolution, Federal University of São Carlos, Rodovia Washington Luís km235, 13565-905 São Carlos, São Paulo Brasil
| | - Reinaldo Alves de Brito
- Department of Genetics and Evolution, Federal University of São Carlos, Rodovia Washington Luís km235, 13565-905 São Carlos, São Paulo Brasil
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22
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Ha JH, Karchin JM, Walker-Kopp N, Castañeda CA, Loh SN. Engineered Domain Swapping as an On/Off Switch for Protein Function. ACTA ACUST UNITED AC 2016; 22:1384-93. [PMID: 26496687 DOI: 10.1016/j.chembiol.2015.09.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 11/25/2022]
Abstract
Domain swapping occurs when identical proteins exchange segments in reciprocal fashion. Natural swapping mechanisms remain poorly understood, and engineered swapping has the potential for creating self-assembling biomaterials that encode for emergent functions. We demonstrate that induced swapping can be used to regulate the function of a target protein. Swapping is triggered by inserting a "lever" protein (ubiquitin) into one of four loops of the ribose binding protein (RBP) target. The lever splits the target, forcing RBP to refold in trans to generate swapped oligomers. Identical RBP-ubiquitin fusions form homo-swapped complexes with the ubiquitin domain acting as the hinge. Surprisingly, some pairs of non-identical fusions swap more efficiently with each other than they do with themselves. Nuclear magnetic resonance experiments reveal that the hinge of these hetero-swapped complexes maps to a region of RBP distant from both ubiquitins. This design is expected to be applicable to other proteins to convert them into functional switches.
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Affiliation(s)
- Jeung-Hoi Ha
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA
| | - Joshua M Karchin
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA
| | - Nancy Walker-Kopp
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA
| | - Carlos A Castañeda
- Departments of Biology and Chemistry, Syracuse University, 111 College Place, Syracuse, NY 13244, USA
| | - Stewart N Loh
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA.
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23
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Northey T, Venthur H, De Biasio F, Chauviac FX, Cole A, Ribeiro KAL, Grossi G, Falabella P, Field LM, Keep NH, Zhou JJ. Crystal Structures and Binding Dynamics of Odorant-Binding Protein 3 from two aphid species Megoura viciae and Nasonovia ribisnigri. Sci Rep 2016; 6:24739. [PMID: 27102935 PMCID: PMC4840437 DOI: 10.1038/srep24739] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 04/05/2016] [Indexed: 12/03/2022] Open
Abstract
Aphids use chemical cues to locate hosts and find mates. The vetch aphid Megoura viciae feeds exclusively on the Fabaceae, whereas the currant-lettuce aphid Nasonovia ribisnigri alternates hosts between the Grossulariaceae and Asteraceae. Both species use alarm pheromones to warn of dangers. For N. ribisnigri this pheromone is a single component (E)-β-farnesene but M. viciae uses a mixture of (E)-β-farnesene, (-)-α-pinene, β-pinene, and limonene. Odorant-binding proteins (OBP) are believed to capture and transport such semiochemicals to their receptors. Here, we report the first aphid OBP crystal structures and examine their molecular interactions with the alarm pheromone components. Our study reveals some unique structural features: 1) the lack of an internal ligand binding site; 2) a striking groove in the surface of the proteins as a putative binding site; 3) the N-terminus rather than the C-terminus occupies the site closing off the conventional OBP pocket. The results from fluorescent binding assays, molecular docking and dynamics demonstrate that OBP3 from M. viciae can bind to all four alarm pheromone components and the differential ligand binding between these very similar OBP3s from the two aphid species is determined mainly by the direct π-π interactions between ligands and the aromatic residues of OBP3s in the binding pocket.
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Affiliation(s)
- Tom Northey
- Crystallography, Institute for Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, University of London, London WC1E 7HX, UK
- Research Department of Structural and Molecular Biology, University College London, Gower St., London WC1E 6BT, UK
| | - Herbert Venthur
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ, UK
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Filomena De Biasio
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ, UK
- Dipartimento di Scienze, Università della Basilicata, via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Francois-Xavier Chauviac
- Crystallography, Institute for Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, University of London, London WC1E 7HX, UK
| | - Ambrose Cole
- Crystallography, Institute for Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, University of London, London WC1E 7HX, UK
| | | | - Gerarda Grossi
- Dipartimento di Scienze, Università della Basilicata, via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Patrizia Falabella
- Dipartimento di Scienze, Università della Basilicata, via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Linda M. Field
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ, UK
| | - Nicholas H. Keep
- Crystallography, Institute for Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, University of London, London WC1E 7HX, UK
| | - Jing-Jiang Zhou
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ, UK
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Missbach C, Vogel H, Hansson BS, Groβe-Wilde E. Identification of Odorant Binding Proteins and Chemosensory Proteins in Antennal Transcriptomes of the Jumping BristletailLepismachilis y-signataand the FirebratThermobia domestica:Evidence for an Independent OBP–OR Origin. Chem Senses 2015; 40:615-26. [DOI: 10.1093/chemse/bjv050] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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25
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Li DZ, Yu GQ, Yi SC, Zhang Y, Kong DX, Wang MQ. Structure-Based Analysis of the Ligand-Binding Mechanism for DhelOBP21, a C-minus Odorant Binding Protein, from Dastarcus helophoroides (Fairmaire; Coleoptera: Bothrideridae). Int J Biol Sci 2015; 11:1281-95. [PMID: 26435694 PMCID: PMC4582152 DOI: 10.7150/ijbs.12528] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 08/17/2015] [Indexed: 11/21/2022] Open
Abstract
Odorant binding proteins (OBPs) transport hydrophobic odor molecules across the sensillar lymph to trigger a neuronal response. Herein, the Minus-C OBP (DhelOBP21) was characterized from Dastarcus helophoroides, the most important natural parasitic enemy insect that targets Monochamus alternatus. Homology modeling and molecular docking were conducted on the interaction between DhelOBP21 and 17 volatile molecules (including volatiles from pine bark, the larva of M. alternatus, and the faeces of the larva). The predicted three-dimensional structure showed only two disulfide bridges and a hydrophobic binding cavity with a short C-terminus. Ligand-binding experiments using N-phenylnaphthylamine (1-NPN) as a fluorescent probe showed that DhelOBP21 exhibited better binding affinities against those ligands with a molecular volume between 100 and 125 ų compared with ligands with a molecular volume between 160 and 185 ų. Molecules that are too big or too small are not conducive for binding. We mutated the amino acid residues of the binding cavity to increase either hydrophobicity or hydrophilia. Ligand-binding experiments and cyber molecular docking assays indicated that hydrophobic interactions are more significant than hydrogen-bonding interactions. Although hydrogen-bond interactions could be predicted for some binding complexes, the hydrophobic interactions had more influence on binding following hydrophobic changes that affected the cavity. The orientation of ligands affects binding by influencing hydrophobic interactions. The binding process is controlled by multiple factors. This study provides a basis to explore the ligand-binding mechanisms of Minus-C OBP.
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Affiliation(s)
- Dong-Zhen Li
- 1. Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P. R. China
| | - Guang-Qiang Yu
- 2. College of Informatics, Huazhong Agricultural University, Wuhan 430070, P. R. China
| | - Shan-Cheng Yi
- 1. Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P. R. China
| | - Yinan Zhang
- 3. Department of Horticulture, Beijing Vocational College of Agriculture, Beijing 102442, PR China
| | - De-Xin Kong
- 2. College of Informatics, Huazhong Agricultural University, Wuhan 430070, P. R. China
| | - Man-Qun Wang
- 1. Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P. R. China
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Sparks JT, Bohbot JD, Dickens JC. Olfactory Disruption. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2015; 130:81-108. [DOI: 10.1016/bs.pmbts.2014.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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27
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Aksenov AA, Martini X, Zhao W, Stelinski LL, Davis CE. Synthetic blends of volatile, phytopathogen-induced odorants can be used to manipulate vector behavior. Front Ecol Evol 2014. [DOI: 10.3389/fevo.2014.00078] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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28
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Schultze A, Breer H, Krieger J. The blunt trichoid sensillum of female mosquitoes, Anopheles gambiae: odorant binding protein and receptor types. Int J Biol Sci 2014; 10:426-37. [PMID: 24719560 PMCID: PMC3979995 DOI: 10.7150/ijbs.8754] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 03/01/2014] [Indexed: 11/05/2022] Open
Abstract
In order to find a blood host and to select appropriate oviposition sites female Anopheles gambiae mosquitoes rely on olfactory cues which are sensed by olfactory sensory neurons (OSNs) located within morphologically different sensilla hairs. While the sharp type trichoid sensilla are most abundant and intensely studied, the striking blunt type trichoid sensilla exist only in small numbers and their specific function is unknown. It has been suggested that they may play a role in the detection of chemical cues indicating oviposition sites. With the aim of identifying molecular elements in blunt type trichoid sensilla, which may be relevant for chemosensory function of this sensillum type, experiments were performed which include whole mount fluorescence in situ hybridization (WM-FISH) and fluorescence immunohistochemistry (WM-FIHC). The studies were concentrated on odorant binding proteins (AgOBPs) and odorant receptors (AgORs). WM-FISH approaches using a probe for the plus-C class AgOBP47 led to the labeling of cells, which resembled in number and antennal distribution pattern the blunt type trichoid sensilla. Moreover, WM-FIHC with an antiserum for AgOBP47 allowed to assign the AgOBP47-expressing cells to blunt type trichoid sensilla and to allocate the protein within the sensillum hair shafts. The result of double WM-FISH-experiments and combined WM-FIHC/FISH approaches indicated that the AgOBP47-expressing cells are co-localized with cells, which express AgOR11, AgOR13 and AgOR55. In addition, it turned out that the two receptor types AgOR13 and AgOR55 are co-expressed in the same cells. Together, the results indicate that the blunt type trichoid sensilla contain a characteristic binding protein, plus-C AgOBP47, in the sensillum lymph and two sensory neurons, one cell which express the odorant receptor AgOR11 and a second cell which express the receptor types AgOR13 and AgOR55. The expression of characteristic chemosensory elements in blunt type trichoid sensilla supports the notion that this sensillum type is involved in sensing distinct odorous compounds.
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Affiliation(s)
- Anna Schultze
- University of Hohenheim, Institute of Physiology, Stuttgart, Germany
| | - Heinz Breer
- University of Hohenheim, Institute of Physiology, Stuttgart, Germany
| | - Jürgen Krieger
- University of Hohenheim, Institute of Physiology, Stuttgart, Germany
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