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Iannucci A, Zhu J, Antonielli L, Ayari A, Nasri-Ammar K, Knoll W, Pelosi P, Dani FR. Chemosensory proteins as putative semiochemical carriers in the desert isopod Hemilepistus reaumurii. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2023; 162:104012. [PMID: 37743031 DOI: 10.1016/j.ibmb.2023.104012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 09/15/2023] [Accepted: 09/17/2023] [Indexed: 09/26/2023]
Abstract
The order Isopoda contains both aquatic and terrestrial species, among which Hemilepistus reaumurii, which lives in arid environments and is the most adapted to terrestrial life. Olfaction has been deeply investigated in insects while it has received very limited attention in other arthropods, particularly in terrestrial crustaceans. In insects, soluble proteins belonging to two main families, Odorant Binding Proteins (OBPs) and Chemosensory Proteins (CSPs), are contained in the olfactory sensillar lymph and are suggested to act as carriers of hydrophobic semiochemicals to or from membrane-bound olfactory receptors. Other protein families, namely Nieman-Pick type 2 (NPC2) and Lipocalins (LCNs) have been also reported as putative odorant carriers in insects and other arthropod clades. In this study, we have sequenced and analysed the transcriptomes of antennae and of the first pair of legs of H. reaumurii focusing on soluble olfactory proteins. Interestingly, we have found 13 genes encoding CSPs, whose sequences differ from those of the other arthropod clades, including non-isopod crustaceans, for the presence of two additional cysteine residues, besides the four conserved ones. Binding assays on two of these proteins showed strong affinities for fatty acids and long-chain unsaturated esters and aldehydes, putative semiochemicals for this species.
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Affiliation(s)
- Alessio Iannucci
- Department of Biology, University of Firenze, 50019, Firenze, Italy; National Biodiversity Future Center, 90133, Palermo, Italy
| | - Jiao Zhu
- AIT Austrian Institute of Technology GmbH, Center for Health & Bioresources, Bioresources Unit, 3430 Tulln, Austria
| | - Livio Antonielli
- AIT Austrian Institute of Technology GmbH, Center for Health & Bioresources, Bioresources Unit, 3430 Tulln, Austria
| | - Anas Ayari
- Université Tunis El Manar, Faculté des Sciences de Tunis, Unité de Recherche de Bio-Ecologie et Systématique Evolutive, 2092, Tunis, Tunisia
| | - Karima Nasri-Ammar
- Université Tunis El Manar, Faculté des Sciences de Tunis, Unité de Recherche de Bio-Ecologie et Systématique Evolutive, 2092, Tunis, Tunisia
| | - Wolfgang Knoll
- AIT Austrian Institute of Technology GmbH, Center for Health & Bioresources, Bioresources Unit, 3430 Tulln, Austria
| | - Paolo Pelosi
- AIT Austrian Institute of Technology GmbH, Center for Health & Bioresources, Bioresources Unit, 3430 Tulln, Austria
| | - Francesca Romana Dani
- Department of Biology, University of Firenze, 50019, Firenze, Italy; National Biodiversity Future Center, 90133, Palermo, Italy.
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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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Wu Y, Li Y, Chu W, Niu T, Feng X, Ma R, Liu H. Expression and functional characterization of odorant-binding protein 2 in the predatory mite Neoseiulus barkeri. INSECT SCIENCE 2023; 30:1493-1506. [PMID: 36458978 DOI: 10.1111/1744-7917.13156] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Olfaction plays a crucial role for arthropods in foraging, mating, and oviposition. The odorant-binding protein (OBP) gene is considered one of the most important olfactory genes. However, little is known about its functions in predatory mites. Here, we used Neoseiulus barkeri, an important commercialized natural pest control, to explore the chemosensory characteristics of OBP. In this study, N. barkeri was attracted by methyl salicylate (MeSA) and showed higher crawling speeds under MeSA treatment. Then, we identified and cloned an OBP gene named Nbarobp2 and analyzed its expression profiles in the predatory mite. Nbarobp2 was 663 bp, was highly expressed in larval and nymphal stages, and was significantly upregulated in N. barkeri under MeSA treatment. Nbarobp2 encoded 202 amino acid residues with a molecular weight of 23 kDa (after removing the signal peptide). Sequence comparisons revealed that the OBPs in Arachnida shared 6 conserved cysteine sites, but were distinguishable from the OBPs of Insecta on the phylogenetic tree. RNA interference, Western blotting, and binding affinity assays further proved that Nbarobp2 was involved in volatile perception in predatory mites. This study shed light on the functional characteristics of OBPs in predatory mites, providing a new insight for better biological control.
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Affiliation(s)
- Yixia Wu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Yaying Li
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Wenqiang Chu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Tiandi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Xiaotian Feng
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Rongjiang Ma
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
| | - Huai Liu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Beibei District, Chongqing, 400715, China
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Mani K, Nganso BT, Rodin P, Otmy A, Rafaeli A, Soroker V. Effects of Niemann-Pick type C2 (NPC2) gene transcripts silencing on behavior of Varroa destructor and molecular changes in the putative olfactory gene networks. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2022; 148:103817. [PMID: 35926690 DOI: 10.1016/j.ibmb.2022.103817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/28/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
To understand the role of two Niemann-Pick type C2 (NPC2) transcripts, Vd40090 (NP1) and Vd74517 (NP5), in the chemosensing pathway of Varroa destructor, we evaluated the impact of NP5 silencing on mites behavior and compared the effect of silencing of either transcripts on the interaction between chemosensory transcripts. In contrast to silencing NP1, which reduced feeding and reproduction by the mite (Nganso et al., 2021), silencing of NP5 reduced significantly the host reaching ability, but it did not affect the feeding on nurse bee. However, silencing of either transcript changed dramatically the co-expression patterns among the putative chemosensory genes, binding proteins and receptors. The results suggest the role of gustatory receptors in the detection of long-range chemical cues in the chemosensory cascade of the Varroa mite.
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Affiliation(s)
- Kannan Mani
- Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel
| | - Beatrice T Nganso
- Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel
| | - Penina Rodin
- Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel
| | - Assaf Otmy
- Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel
| | - Ada Rafaeli
- Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel
| | - Victoria Soroker
- Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, The Volcani Centre, Rishon LeZion, Israel.
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