1
|
Betancor G, Jimenez-Guardeño JM, Lynham S, Antrobus R, Khan H, Sobala A, Dicks MDJ, Malim MH. MX2-mediated innate immunity against HIV-1 is regulated by serine phosphorylation. Nat Microbiol 2021; 6:1031-1042. [PMID: 34282309 PMCID: PMC7611661 DOI: 10.1038/s41564-021-00937-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/17/2021] [Indexed: 01/24/2023]
Abstract
The antiviral cytokine interferon activates expression of interferon-stimulated genes to establish an antiviral state. Myxovirus resistance 2 (MX2, also known as MxB) is an interferon-stimulated gene that inhibits the nuclear import of HIV-1 and interacts with the viral capsid and cellular nuclear transport machinery. Here, we identified the myosin light chain phosphatase (MLCP) subunits myosin phosphatase target subunit 1 (MYPT1) and protein phosphatase 1 catalytic subunit-β (PPP1CB) as positively-acting regulators of MX2, interacting with its amino-terminal domain. We demonstrated that serine phosphorylation of the N-terminal domain at positions 14, 17 and 18 suppresses MX2 antiviral function, prevents interactions with the HIV-1 capsid and nuclear transport factors, and is reversed by MLCP. Notably, serine phosphorylation of the N-terminal domain also impedes MX2-mediated inhibition of nuclear import of cellular karyophilic cargo. We also found that interferon treatment reduces levels of phosphorylation at these serine residues and outline a homeostatic regulatory mechanism in which repression of MX2 by phosphorylation, together with MLCP-mediated dephosphorylation, balances the deleterious effects of MX2 on normal cell function with innate immunity against HIV-1.
Collapse
Affiliation(s)
- Gilberto Betancor
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK.
| | - Jose M Jimenez-Guardeño
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Steven Lynham
- Centre of Excellence for Mass Spectrometry, The James Black Centre, King's College London, London, UK
| | - Robin Antrobus
- Cambridge Institute for Medical Research, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Hataf Khan
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Andrew Sobala
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Matthew D J Dicks
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Michael H Malim
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King's College London, London, UK.
| |
Collapse
|
2
|
Zhang JH, Wang S, Yang S, Yi J, Liu Y, Xi JH. DIFFERENTIAL PROTEOME ANALYSIS OF THE MALE AND FEMALE ANTENNAE FROM Holotrichia parallela. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2016; 92:274-287. [PMID: 27396371 DOI: 10.1002/arch.21338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To understand the olfactory mechanisms of Holotrichia parallela antennae in detecting volatile compounds in the environment, protein profiles of H. parallela antennae were analyzed using two-dimensional electrophoresis followed by mass spectrometry and bioinformatics analyses. Approximately 1,100 protein spots in silver staining gel were detected. Quantitative image analysis revealed that in total 47 protein spots showed significant changes in different genders of adult antennae. Thirty-five differentially expressed proteins were identified by Matrix assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF/TOF) tandem mass spectrometer, among which 65.7% are involved in carbohydrate and energy metabolism, antioxidant system, transport, and amino acid/nucleotide metabolism. Some proteins identified here have not been reported previously in insect antennae. Identified male-biased proteins included odorant-binding protein 4, pheromone-binding protein-related protein 2, odorant-binding protein 14, prophenoloxidase-I, acyl-CoA dehydrogenase, aldo-keto reductase-like, carbamoyl phosphate synthetase, etc. whereas some proteins are female biased, such as antennae-rich cytochrome P450, aldehyde dehydrogenase, and putative glutamine synthetase. Alterations in the levels of some proteins were further confirmed by real time polymerase chain reaction (RT-PCR). The proteomic resources displayed here are valuable for the discovery of proteins from H. parallela antennae.
Collapse
Affiliation(s)
- Ju-Hong Zhang
- College of Plant Science, Jilin University, ChangChun, P. R. China
| | - Shang Wang
- College of Plant Science, Jilin University, ChangChun, P. R. China
| | - Shuang Yang
- College of Plant Science, Jilin University, ChangChun, P. R. China
| | - Jiankun Yi
- College of Plant Science, Jilin University, ChangChun, P. R. China
| | - Yan Liu
- College of Plant Science, Jilin University, ChangChun, P. R. China
| | - Jing-Hui Xi
- College of Plant Science, Jilin University, ChangChun, P. R. China
| |
Collapse
|
3
|
Dickens JC, Prestwich GD, Sun WC. Behavioral and neurosensory responses of the boll weevil,Anthonomus grandis Boh. (Coleoptera: Curculionidae), to fluorinated analogs of aldehyde components of its pheromone. J Chem Ecol 2013; 17:1007-20. [PMID: 24259164 DOI: 10.1007/bf01402930] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/1990] [Accepted: 01/30/1991] [Indexed: 11/30/2022]
Abstract
Competitive field tests with α-fluorinated analogs of compounds III and IV (III-α-F and IV-α-F, respectively) of the boll weevil,Anthonomus grandis Boh., aggregation pheromone showed these compounds, when combined with the other pheromone components [(±)-I and II], to be as attractive as grandlure [(+)-I, II, and III+IV]. Dose-response curves constructed from electroantennograms of male boll weevils to serial stimulus loads of III, IV, III-α-F, IV-α-F, and the corresponding acyl fluorinated analogs (III-acyl-F and IV-acyl-F) showed the α-fiuorinated analogs to be as active as the pheromone components (threshold=0.1 μg), while the acyl fluorinated analogs had a 10-100 x higher threshold (=1-10 μg). Single-neuron recordings showed that IV neurons and II neurons (Dickens, 1990) responded to IV-α-F and III-α-F, respectively, while IV-acyl-F and III-acyl-F were inactive. Since a previous study showed compounds I, II, and IV to be essential for behavioral responses in the field, it seems likely that the activity of the α-fluorinated analogs observed here is due to the stimulation of IV neurons by IV-α-F as indicated in single neuron recordings.
Collapse
Affiliation(s)
- J C Dickens
- Boll Weevil Research Unit, USDA, ARS, 39762, Mississippi, Mississippi State
| | | | | |
Collapse
|
4
|
Quero C, Camps F, Guerrero A. Behavior of processionary males (Thaumetopoea pityocampa) induced by sex pheromone and analogs in a wind tunnel. J Chem Ecol 2013; 21:1957-69. [PMID: 24233899 DOI: 10.1007/bf02033855] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/1995] [Accepted: 07/23/1995] [Indexed: 11/24/2022]
Abstract
The behavioral response of processionary males (Thaumetopoea pityocampa) to the natural pheromone (Z)-13-hexadecen-11-ynyl acetate (1) and structurally related analogs in a wind tunnel is presented. Stereomerically pureZ-1 and a mixture with theE isomer in 80:20 ratio elicited similar attraction responses at 1 µg and higher. The activity was dose-dependent, being optimum at 1 µg with 90% and 80% of males contacting with the source in the presence of theZ-1 andZ/E-1, respectively. 11-Hexadecynyl acetate (2) functioned as a pheromone mimic, being able to induce the complete mate-finding behavioral sequence, although its activity was much lower than that of the pheromone. (Z)-13-Hexadecen-11-ynyl alcohol (3) and, particularly, (Z)-13-hexadecen-11-ynal (4) were potent inhibitors of the upwind flight response in mixtures withZ-1 in 99:1, 95:5, and 91:9 ratios. (Z)-1,1,1-Trifluoro-16-nonadecen-14-yn-2-one (5) also inhibited the response of males to pheromone, particularly in the source contact behavior. Comparison with activity displayed by analogs in field tests is also reported.
Collapse
Affiliation(s)
- C Quero
- Department of Biological Organic Chemistry, C.I.D. (CSIC), Jordi Girona, 18-26, 08034, Barcelona, Spain
| | | | | |
Collapse
|
5
|
Gu SH, Wu KM, Guo YY, Pickett JA, Field LM, Zhou JJ, Zhang YJ. Identification of genes expressed in the sex pheromone gland of the black cutworm Agrotis ipsilon with putative roles in sex pheromone biosynthesis and transport. BMC Genomics 2013; 14:636. [PMID: 24053512 PMCID: PMC3849270 DOI: 10.1186/1471-2164-14-636] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 09/13/2013] [Indexed: 11/26/2022] Open
Abstract
Background One of the challenges in insect chemical ecology is to understand how insect pheromones are synthesised, detected and degraded. Genome wide survey by comparative sequencing and gene specific expression profiling provide rich resources for this challenge. A. ipsilon is a destructive pest of many crops and further characterization of the genes involved in pheromone biosynthesis and transport could offer potential targets for disruption of their chemical communication and for crop protection. Results Here we report 454 next-generation sequencing of the A. ipsilon pheromone gland transcriptome, identification and expression profiling of genes putatively involved in pheromone production, transport and degradation. A total of 23473 unigenes were obtained from the transcriptome analysis, 86% of which were A. ipsilon specific. 42 transcripts encoded enzymes putatively involved in pheromone biosynthesis, of which 15 were specifically, or mainly, expressed in the pheromone glands at 5 to 120-fold higher levels than in the body. Two transcripts encoding for a fatty acid synthase and a desaturase were highly abundant in the transcriptome and expressed more than 40-fold higher in the glands than in the body. The transcripts encoding for 2 acetyl-CoA carboxylases, 1 fatty acid synthase, 2 desaturases, 3 acyl-CoA reductases, 2 alcohol oxidases, 2 aldehyde reductases and 3 acetyltransferases were expressed at a significantly higher level in the pheromone glands than in the body. 17 esterase transcripts were not gland-specific and 7 of these were expressed highly in the antennae. Seven transcripts encoding odorant binding proteins (OBPs) and 8 encoding chemosensory proteins (CSPs) were identified. Two CSP transcripts (AipsCSP2, AipsCSP8) were highly abundant in the pheromone gland transcriptome and this was confirmed by qRT-PCR. One OBP (AipsOBP6) were pheromone gland-enriched and three OBPs (AipsOBP1, AipsOBP2 and AipsOBP4) were antennal-enriched. Based on these studies we proposed possible A. ipsilon biosynthesis pathways for major and minor sex pheromone components. Conclusions Our study identified genes potentially involved in sex pheromone biosynthesis and transport in A. ipsilon. The identified genes are likely to play essential roles in sex pheromone production, transport and degradation and could serve as targets to interfere with pheromone release. The identification of highly expressed CSPs and OBPs in the pheromone gland suggests that they may play a role in the binding, transport and release of sex pheromones during sex pheromone production in A. ipsilon and other Lepidoptera insects.
Collapse
Affiliation(s)
- Shao-Hua Gu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | | | | | | | | | | | | |
Collapse
|
6
|
Woltedji D, Song F, Zhang L, Gala A, Han B, Feng M, Fang Y, Li J. Western Honeybee Drones and Workers (Apis mellifera ligustica) Have Different Olfactory Mechanisms than Eastern Honeybees (Apis cerana cerana). J Proteome Res 2012; 11:4526-40. [DOI: 10.1021/pr300298w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dereje Woltedji
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Feifei Song
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Lan Zhang
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Alemayehu Gala
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Bin Han
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Mao Feng
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Yu Fang
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| | - Jianke Li
- Institute
of Apicultural Research/Key Laboratory of
Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Science, Beijing, China
| |
Collapse
|
7
|
|
8
|
Eng WS, Prestwich GD. A short radiosynthesis of natural juvenile hormone III, methyl [12-3H]-(10R)-10,11-epoxyfarnesoate. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580250607] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
9
|
Boehm MF, Prestwich GD. Synthesis of tritium-labelled fenoxycarb and S-31183, two phenoxyphenyl ether insect growth regulators. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580250913] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
10
|
Kan W, Zhang Z, Yang X, Fang Y, Xiao C. An analysis of structure fitting and bioactivity between sex pheromone of cotton bollworm,Helicoverpa armigera (Hübner) and its fluorinated analogs. CHINESE SCIENCE BULLETIN-CHINESE 2005. [DOI: 10.1007/bf03183655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Pesenti C, Viani F. The Influence of Fluorinated Molecules (Semiochemicals and Enzyme Substrate Analogues) on the Insect Communication System. Chembiochem 2004; 5:590-613. [PMID: 15122631 DOI: 10.1002/cbic.200300829] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Can the introduction of fluorine atoms affect the bioactivity of natural semiochemicals? Can fluorine contribute in the creation of specific enzyme inhibitors to interrupt or disrupt the insect communication system? The first step for the bioactivity of a molecule is interaction with the biological sensor. Hydrogen and fluorine are almost bioisosteric and the receptor site of the enzyme can still recognize and accept the fluoro analogue of its natural substrate. However, the peculiar electronegativity of the fluorine atom can affect the binding, absorption, and transport of the molecule. The differences in the molecule's electronic properties can lead to differences in the chemical interactions between the receptor and the fluorinated substrate. Fluorine introduction can modify the metabolic stability and pathway of the semiochemicals in many different ways. Fluorinated analogues can show synergism, inhibition, or hyperagonism effects on insect behaviors, that is, the activity of the nonfluorinated parent compounds can be mimicked, lost, or increased. In any case, the fluorinated molecules can interact with the bioreceptors in a new and disrupting way. The semiochemicals are olfactory substances: fluorine can affect their volatility or smell. Production of semiochemicals from exogenous substances, perception at antennal receptors, and processing of biological responses are the main steps of communication among insects. In the production step, the fluorinated molecules can interact with enzymes that catalyze the biosynthesis of the natural pheromones. In the perception step, fluorinated semiochemicals can interact with the olfactory receptor cells; this often leads to totally unpredictable behaviors. Fluorinated molecules have been developed as probes to elucidate the complex chemorecognition processes of insects. Many of these molecules have been tested to find highly effective behavior-modifying chemicals. New analogues have been synthesized to investigate the metabolic pathway of a pheromone molecule and many of them are promising disrupting agents. Despite such titanic research efforts, the results have often been random, rational trends in the induced behaviors have sometimes been impossible to find, and practical applications of the fluorinated semiochemicals are still uncertain.
Collapse
Affiliation(s)
- Cristina Pesenti
- Istituto di Chimica per il Riconoscimento Molecolare, Consiglio Nazionale delle Ricerche, Via Mancinelli 7, 20131 Milano, Italy
| | | |
Collapse
|
12
|
Lee HK, Zheng YF, Xiao XY, Bai M, Sakakibara J, Ono T, Prestwich GD. Photoaffinity labeling identifies the substrate-binding site of mammalian squalene epoxidase. Biochem Biophys Res Commun 2004; 315:1-9. [PMID: 15013417 DOI: 10.1016/j.bbrc.2004.01.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2003] [Indexed: 11/17/2022]
Abstract
Squalene epoxidase (SE) catalyzes the conversion of squalene to (3S)-2,3-oxidosqualene. Photolabeling and site-directed mutagenesis were performed on recombinant rat SE (rrSE) in order to identify the location of the substrate-binding site and the roles of key residues in catalysis. Truncated 50-kDa rrSE was purified and photoaffinity labeled by competitive SE inhibitor (Ki=18.4 microM), [(3)H]TNSA-Dza. An 8-kDa CNBr/BNPS-skatole peptide was purified and the first 24 amino acids were sequenced by Edman degradation. The sequence PASFLPPSSVNKRGVLLLGDAYNL corresponded to residues 388-411 of the full-length rat SE. Three nucleophilic residues (Lys-399, Arg-400, and Asp-407) were labeled by [(3)H]TNSA-Dza. Triple mutants were prepared in which bulky groups were used to replace the labeled charged residues. Purified mutant enzymes showed lower enzymatic activity and reduced photoaffinity labeling by [(3)H]TNSA-Dza. This constitutes the first evidence as to the identity of the substrate-binding site of SE.
Collapse
Affiliation(s)
- Hee-Kyoung Lee
- Department of Biochemistry and Cell Biology, The University at Stony Brook, NY 11794-5215, USA
| | | | | | | | | | | | | |
Collapse
|
13
|
Metzler DE, Metzler CM, Sauke DJ. Specific Aspects of Lipid Metabolism. Biochemistry 2001. [DOI: 10.1016/b978-012492543-4/50024-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
14
|
|
15
|
|
16
|
Saljoughian M, Morimoto H, Than C, Williams PG. Tritium labelled alkenes via the Shapiro reaction. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00448-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Abstract
Pheromone perception in Lepidoptera requires initial recognition and transport of the pheromone molecule by ligand-specific pheromone binding proteins (PBPs) in the moth antennae, followed by recognition of the ligand or PBP-ligand complex by a transmembrane G-protein-coupled odorant receptor protein. This signal is transduced by activation of a specific phospholipase C, intracellular release of inositol 1,4,5-trisphosphate (IP3) and IP3-gated opening of an ion channel. Individual pheromone-specific PBPs provide the initial ligand recognition event and encode ligand specificity. We have used photoaffinity labeling, cDNA library screening and cloning, protein expression, a novel binding assay and site-directed mutagenesis to define the ligand specificity of PBPs.
Collapse
Affiliation(s)
- G D Prestwich
- Department of Chemistry, University at Stony Brook, NY 11794-3400, USA
| |
Collapse
|
18
|
Arruda LK, Vailes LD, Hayden ML, Benjamin DC, Chapman MD. Cloning of cockroach allergen, Bla g 4, identifies ligand binding proteins (or calycins) as a cause of IgE antibody responses. J Biol Chem 1995; 270:31196-201. [PMID: 8537384 DOI: 10.1074/jbc.270.52.31196] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
An allergen cloned from a Blattella germanica (German cockroach) cDNA library, encoded a 182-amino acid protein of 20,904 Da. This protein, designated B. germanica allergen 4 (Bla g 4), was expressed as a glutathione S-transferase fusion protein in Escherichia coli and purified by affinity chromatography and high-performance liquid chromatography. The prevalence of serum IgE antibody to recombinant Bla g 4 in 73 cockroach allergic patients with asthma ranged from 40% (antigen binding radioimmunoassay) to 60% (plaque immunoassay). Cockroach allergic patients gave positive intradermal skin tests to recombinant Bla g 4 at concentrations of 10(-3)-10(-5) micrograms/ml, whereas non-allergic controls, or cockroach allergic patients with no detectable serum IgE antibody to Bla g 4, gave negative skin tests to 1 microgram/ml. Polymerase chain reaction and Southern analysis identified a 523-base pair DNA encoding Bla g 4 in both B. germanica and Periplaneta americana (American cockroach). However, Northern analysis showed that mRNA encoding Bla g 4 was transcribed in B. germanica but not in P. americana, suggesting that allergen expression was species specific. Sequence similarity searches showed that Bla g 4 was a ligand binding protein or calycin and unexpectedly revealed that this family contained several important allergens: beta-lactoglobulin, from cow milk, and rat and mouse urinary proteins. Although the overall sequence homology between these proteins was low (approximately 20%), macromolecular modeling techniques were used to generate two models of the tertiary structure of Bla g 4, based on comparisons with the x-ray crystal coordinates of bilin binding protein and rodent urinary proteins. The results show that members of the calycin protein family can cause IgE antibody responses by inhalation or ingestion and are associated with asthma and food hypersensitivity.
Collapse
Affiliation(s)
- L K Arruda
- Department of Internal Medicine, University of Virginia Health Sciences Center, Charlottesville 22908, USA
| | | | | | | | | |
Collapse
|
19
|
Prestwich GD, Touhara K, Riddiford LM, Hammock BD. Larva lights: a decade of photoaffinity labeling with juvenile hormone analogues. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 1994; 24:747-761. [PMID: 7981725 DOI: 10.1016/0965-1748(94)90104-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The introduction of photoaffinity labeling into the mode of action of insect hormones and pheromones started 12 yr ago with the photoaffinity labeling of juvenile hormone binding proteins (JHBPs) from cockroaches in the laboratory of the late John K. Koeppe. Applying this technique to Manduca sexta led ultimately to a three-laboratory collaborative project that has begun to dissect the molecular basis for JH transport, metabolism, and nuclear binding and gene activation in Lepidoptera. This review provides (1) a history of the first experiments; (2) an idea of the breadth of the technique in the arthropod classes Insecta, Crustacea, and Arachnida; and (3) evidence for the depth of the technique in unearthing key details about three different types of the molecular action of JH in M. sexta.
Collapse
Affiliation(s)
- G D Prestwich
- Department of Chemistry, University at Stony Brook, NY 11794-3400
| | | | | | | |
Collapse
|
20
|
Touhara K, Prestwich G. Juvenile hormone epoxide hydrolase. Photoaffinity labeling, purification, and characterization from tobacco hornworm eggs. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(19)36559-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
21
|
Ambroziak W, Pietruszko R. Metabolic role of aldehyde dehydrogenase. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1993; 328:5-15. [PMID: 8493929 DOI: 10.1007/978-1-4615-2904-0_2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- W Ambroziak
- Institute of General Food Chemistry, Technical University of Lodz, Poland
| | | |
Collapse
|
22
|
Electrophysiological and behavioral responses of turnip moth males,Agrotis segetum to fluorinated pheromone analogs. J Chem Ecol 1993; 19:143-57. [DOI: 10.1007/bf00987479] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/1992] [Accepted: 09/09/1992] [Indexed: 10/25/2022]
|
23
|
Robinson GE, Strambi C, Strambi A, Huang ZY. Reproduction in worker honey bees is associated with low juvenile hormone titers and rates of biosynthesis. Gen Comp Endocrinol 1992; 87:471-80. [PMID: 1426950 DOI: 10.1016/0016-6480(92)90055-o] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Three experiments were performed to determine the role of juvenile hormone (JH) in worker reproduction in queenless colonies of honey bees. In Experiment 1, egg-laying workers had low hemolymph titers of JH, as did bees engaged in brood care, while foragers had significantly higher titers. Experiment 2 confirmed these findings by demonstrating that laying workers have significantly lower rates of JH biosynthesis than foragers do. In Experiment 3, ovary development was inhibited slightly by application of the JH analog methoprene to 1-day-old bees, but was not affected by application to older bees, at least some already displaying egg-laying behavior. These results, which are consistent with earlier findings for queen honey bees, are contrary to a common model of insect reproduction, in which elevated JH titers trigger ovary development, which then leads to oviposition. Previous experiments have demonstrated that JH regulates nonreproductive behavior in workers that is associated with colony division of labor; perhaps this function is incompatible with a traditional role for JH in reproduction.
Collapse
Affiliation(s)
- G E Robinson
- Department of Entomology, University of Illinois, Urbana 61801
| | | | | | | |
Collapse
|
24
|
Touhara K, Prestwich GD. Binding site mapping of a photoaffinity-labeled juvenile hormone binding protein. Biochem Biophys Res Commun 1992; 182:466-73. [PMID: 1734862 DOI: 10.1016/0006-291x(92)91755-f] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The juvenile hormone binding protein (JHBP) of larval Manduca sexta was labeled by a photoaffinity analog of JH II and purified by preparative IEF and ion-exchange HPLC. The purified [3H]EHDA-labeled JHBP was selectively cleaved by CNBr and by endoproteinases Lys-C and Glu-C. The radioactive peptides were separated by tricine SDS-PAGE and sequenced after blotting to a PVDF membrane. The sequence revealed that Ala184-Asn226 contained a primary binding site of [3H]EHDA. Furthermore, peptide mapping indicated that Asp1-Glu34 also contained a second covalent attachment site of [3H]EHDA. Labeling of the N-terminal region increased when the photolysis was performed at lower temperature. Since Ala184-Asn226 is predicted to be a hydrophobic beta-sheet region, it may participate in the recognition of lipophilic backbone of JH. Five out of six cysteines are located in these two regions, consistent with a model in which the two binding regions connected by disulfide bridges provide a two-sided binding pocket for juvenile hormone.
Collapse
Affiliation(s)
- K Touhara
- Department of Chemistry, State University of New York, Stony Brook 11794-3400
| | | |
Collapse
|
25
|
Krieger J, Raming K, Prestwich GD, Frith D, Stabel S, Breer H. Expression of a pheromone-binding protein in insect cells using a baculovirus vector. EUROPEAN JOURNAL OF BIOCHEMISTRY 1992; 203:161-6. [PMID: 1730221 DOI: 10.1111/j.1432-1033.1992.tb19841.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A cDNA encoding a pheromone-binding protein from the male silkmoth Antheraea pernyi has been integrated into the genome of the Autographa californica multiple nuclear polyhydrosis virus such that the transcription was under the control of the strong polyhedrin promoter. Recombinant pheromone-binding protein was expressed in a baculovirus-infected insect cell line (Sf9) and secreted from the cells into the culture medium. Using a two-step protocol, recombinant pheromone-binding protein has been isolated and purified to homogeneity. Pheromone binding of recombinant protein has been demonstrated using a tritiated analog of (E,Z)-6,11-hexadecadienyl acetate.
Collapse
Affiliation(s)
- J Krieger
- University Stuttgart-Hohenheim, Institute of Zoophysiology, Federal Republic of Germany
| | | | | | | | | | | |
Collapse
|
26
|
Brash A, Hughes M, Hawkins D, Boeglin W, Song W, Meijer L. Allene oxide and aldehyde biosynthesis in starfish oocytes. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54443-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
27
|
Abstract
Odor molecules may be considered as molecular ligands which bind to receptors in the olfactory sensory neurons to give rise to the sensory response. Binding studies in whole sensory epithelia suggest that the receptors also bind muscarinic cholinergic antagonists. Preliminary electrophysiological evidence indicates that muscarinic and beta adrenergic antagonists block odor-elicited membrane currents in single isolated salamander sensory neurons. These results support the idea that models developed for analyzing ligand binding by members of the 7 transmembrane domain family of membrane receptors may apply rather closely to olfactory transduction. We suggest that sensory neurons express single receptor types with differing degrees of affinity for different ligands. We further suggest that glomeruli in the olfactory bulb function as labeled lines for particular sets of odor ligand determinants, and that interglomerular circuits bind together similar glomeruli and enhance contrast between dissimilar glomeruli. The odor image laid down in the sensory neuron population is thus subjected to abstracting and enhancement at the glomerular stage, prior to being transmitted for further processing in the deeper layers of the olfactory bulb and in the olfactory cortex.
Collapse
Affiliation(s)
- G M Shepherd
- Section of Neurobiology, Yale University School of Medicine, New Haven, CT 06510
| | | |
Collapse
|
28
|
Goodman WG, Maxfield B, Park YC. Immunochemical similarities among the hemolymph juvenile hormone binding proteins of moths. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01929888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
29
|
Palli SR, Riddiford LM, Hiruma K. Juvenile hormone and “retinoic acid” receptors in Manduca epidermis. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0020-1790(91)90059-n] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
30
|
Okot-Kotber B, Prestwich GD. Identification of a juvenile hormone binding protein in the castes of the termite, Reticulitermes flavipes, by photoaffinity labeling. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0020-1790(91)90119-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
Prestwich GD. Photoaffinity labeling and biochemical characterization of binding proteins for pheromones, juvenile hormones, and peptides. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0020-1790(91)90061-i] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
32
|
Cloning and sequencing of a cDNA for the hemolymph juvenile hormone binding protein of larval Manduca sexta. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(17)45443-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
33
|
Prestwich GD, Bruce MJ, Ujváry I, Chang ES. Binding proteins for methyl farnesoate in lobster tissues: detection by photoaffinity labeling. Gen Comp Endocrinol 1990; 80:232-7. [PMID: 2074002 DOI: 10.1016/0016-6480(90)90168-l] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Methyl farnesoate (MF) is secreted by the mandibular organs of crustaceans, but its physiological role and biochemical distribution are only partially known. Characterization of specific MF binding proteins (MFBP) in homogenates of tissues of the American lobster, Homarus americanus, was achieved by photoaffinity labeling with tritium-labeled farnesyl diazomethyl ketone (3H-FDK). The tissues selected include epidermis, tail muscle, central nervous system, eyestalk, hemolymph, hepatopancreas, ovaries, testes, and Y-organ. Both high-speed pellets and supernatants were tested. Competing ligands employed to verify specificity of light-induced covalent modification included MF, methoprene, and unlabeled FDK. A 40-kDa band was labeled strongly in the hemolymph; the labeling was displaced in the presence of a 100-fold excess of unlabeled MF. Although many other tissues had proteins which labeled with 3H-FDK, none of these showed competition by MF. This MFBP is thus functionally analogous to the hemolymph JH-binding proteins of insects.
Collapse
Affiliation(s)
- G D Prestwich
- Bodega Marine Laboratory, University of California, Bodega Bay 94923
| | | | | | | |
Collapse
|
34
|
Perfluorinated moth pheromones. J Chem Ecol 1990; 16:1761-78. [DOI: 10.1007/bf01020493] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/1989] [Accepted: 10/10/1989] [Indexed: 10/25/2022]
|
35
|
Tasayco ML, Prestwich GD. Aldehyde-oxidizing enzymes in an adult moth: in vitro study of aldehyde metabolism in Heliothis virescens. Arch Biochem Biophys 1990; 278:444-51. [PMID: 2327797 DOI: 10.1016/0003-9861(90)90283-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The conversion of pheromonal aldehydes to carboxylic acids in vitro in tissue extracts of Heliothis virescens is catalyzed by both aldehyde dehydrogenase and aldehyde oxidase enzymes. The aldehyde-oxidizing activity in antennae, heads, legs, and hemolymph from male and female moths was examined by radiochromatographic and spectroscopic assays. First, the enzymatic activity was measured in the presence or absence of added NAD+ using either (Z)-9-tetradecenal or (Z)-11-hexadecenal as tritiated substrate. Second, substrate specificity was determined spectroscopically by (i) indirect measurement of the AO-released hydrogen peroxide through the coupled AO-horseradish peroxidase reaction and by (ii) direct measurement of the ALDH-produced NADH. Both aldehyde-oxidizing activities were associated with soluble enzymes in the antennal extracts, and these enzymes degraded pheromone and nonpheromonal aldehydes. Both AO and ALDH activities were present in male and female tissues. AO activity was exhibited primarily in the antennal extracts and to a lesser degree in the leg extracts. Moreover, ALDH activity was distributed in the antenna, head, and leg extracts. A vinyl ketone analog of (Z)-11-hexadecenal preferentially inhibited the ALDH activity over the AO activity.
Collapse
Affiliation(s)
- M L Tasayco
- Department of Chemistry, State University of New York, Stony Brook 11794-3400
| | | |
Collapse
|
36
|
Rapid purification and N-terminal amino acid sequence of a photoaffinity-labeled juvenile hormone binding protein from an arctiid moth larva, Platyprepia virginalis. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0020-1790(90)90098-f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
37
|
Palli SR, Osir EO, Eng W, Boehm MF, Edwards M, Kulcsar P, Ujvary I, Hiruma K, Prestwich GD, Riddiford LM. Juvenile hormone receptors in insect larval epidermis: identification by photoaffinity labeling. Proc Natl Acad Sci U S A 1990; 87:796-800. [PMID: 11607060 PMCID: PMC53353 DOI: 10.1073/pnas.87.2.796] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Tritiated photoaffinity analogs of the natural lepidopteran juvenile hormones, JH I and II [epoxy[3H]bishomofarnesyl diazoacetate ([3H]EBDA) and epoxy[3H]homofarnesyl diazoacetate ([3H]EHDA)], and of the JH analog methoprene [[3H]methoprene diazoketone ([3H]MDK)] were synthesized and used to identify specific JH binding proteins in the larval epidermis of the tobacco hornworm (Manduca sexta). EBDA and EHDA specifically photolabeled a 29-kDa nuclear protein (pI 5.8). This protein and a second 29-kDa protein (pI 6.0) were labeled by MDK, but excess unlabeled methoprene or MDK only prevented binding to the latter. These 29-kDa proteins are also present in larval fat body but not in epidermis from either wandering stage or allatectomized larvae, which lack high-affinity JH binding sites. A 29-kDa nuclear protein with the same developmental specificity as this JH binder bound the DNA of two larval endocuticle genes. A 38-kDa cytosolic protein was also specifically photolabeled by these photoaffinity analogs. The 29-kDa nuclear protein is likely the high-affinity receptor for JH that mediates its genomic action, whereas the 38-kDa cytosolic protein may serve as an intracellular carrier for these highly lipophilic hormones and hormone analogs.
Collapse
Affiliation(s)
- S R Palli
- Department of Zoology, University of Washington, Seattle, WA 98185, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Robinson GE, Page RE, Strambi C, Strambi A. Hormonal and Genetic Control of Behavioral Integration in Honey Bee Colonies. Science 1989; 246:109-12. [PMID: 17837770 DOI: 10.1126/science.246.4926.109] [Citation(s) in RCA: 159] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The ability of insect colonies to adjust the division of labor among workers in response to changing environmental and colony conditions, coupled with research showing genetic effects on the division of labor in honey bee colonies, led to an investigation of the role of genetics and the environment in the integration of worker behavior. Measurements of juvenile hormone(JH) titers and allozyme analyses of worker honey bees suggest that two processes are involved in colony-level regulation of division of labor: (i) plasticity in age-dependent behavior is a consequence of modulation of JH titers by extrinsic factors, and (ii) stimuli that can affect JH titers and age-dependent behavior do elicit variable responses among genetically distinct subpopulations of workers within a colony. These results provide a new perspective on the developmental plasticity of insect colonies and support the emerging view that colony genetic structure affects behavioral organization.
Collapse
|
39
|
Odinokov VN, Akhmetova VR, Khasanov KD, Abduvakhabov AA, Kuchin AV, Andreeva NI, Tolstikov GA. Insect pheromones and their analogs. Chem Nat Compd 1989. [DOI: 10.1007/bf00598087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
40
|
Prestwich GD, Graham SM, Handley M, Latli B, Streinz L, Tasayco MLJ. Enzymatic processing of pheromones and pheromone analogs. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01951812] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
41
|
Mohamed MA, Lerro KA, Prestwich GD. Polyacrylamide gel miniaturization improves protein visualization and autoradiographic detection. Anal Biochem 1989; 177:287-90. [PMID: 2729547 DOI: 10.1016/0003-2697(89)90053-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polyacrylamide gels shrink to one-quarter of their original area when soaked in a 50% (w/v) solution of polyethylene glycol. Gel miniaturization improves the contrast of protein bands, with four valuable consequences. (i) A 5- to 10-fold increase in sensitivity for Coomassie blue is observed. (ii) Gels are more durable; i.e., they resist tearing when wet and they do not crack during drying under vacuum. (iii) Shrunken gels give sharper photographic images and provide better interlane protein band comparisons. (iv) Condensed protein bands lead to an increased sensitivity for detecting low-abundance, radioactively-labeled proteins by fluorography.
Collapse
Affiliation(s)
- M A Mohamed
- Department of Chemistry, State University of New York, Stony Brook 11794-3400
| | | | | |
Collapse
|
42
|
Dickens JC, Prestwich GD. Differential recognition of geometric isomers by the boll weevil,Anthonomus grandis Boh. (Coleoptera: Curculionidae): Evidence for only three essential components in aggregation pheromone. J Chem Ecol 1989; 15:529-40. [PMID: 24271796 DOI: 10.1007/bf01014698] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/1987] [Accepted: 03/29/1988] [Indexed: 10/25/2022]
Abstract
For two decades, the aggregation pheromone of the boll weevil,Anthonomus grandis Boh. (Coleoptera: Curculionidae), was thought to consist of four compounds: I [(+)-(Z)-2-isopropenyl-1-methylcyclobutane ethanol]; II [(Z)-3,3-dimethyl-Δ(I,β)-cyclohexane ethanol]; III [(Z)-3,3-dimethyl-Δ(1,α)-cyclohexane acetaldehyde); and IV [(E)-3,3-dimethyl-Δ(1,α)-cyclohexane acetaldehyde). Evidence is presented from behavioral and electrophysiological studies to show that only three of these components, I, II, and IV, are essential for attraction. Competitive field tests, in which each possible three-component blend was tested against the four-component mixture, demonstrated that omission of I, II. or IV resulted in decreased trap captures (P < 0.01). Trap captures by these blends lacking I, II, or IV resembled those by the hexane solvent alone in a similar experiment. However, omission of III did not significantly alter field attractiveness of the blend. Dosage-response curves constructed from electroantennogram responses of both males and females to serial dilutions of III, IV, and a 50∶50 mixture of the geometric isomers III and IV showed both sexes to be 10- to 100-fold more sensitive to IV than III. Data from the electrophysiological studies were consistent with a single acceptor type for the (E)-cyclohexylidene aldehyde, IV, for males, and possibly one or two acceptor types for III and IV for females. Possible roles for the (Z)-cyclohexylidene aldehyde, III, and implications for the pheromonal attractant currently used in boll weevil eradication/suppression programs are discussed.
Collapse
Affiliation(s)
- J C Dickens
- Boll Weevil Research Unit, USDA-ARS, 39762, Mississippi, Mississippi State
| | | |
Collapse
|
43
|
Wang X, Chang ES, O'Connor JD. Purification of the Drosophila Kc cell juvenile hormone binding protein. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0020-1790(89)90079-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
44
|
Mclean JA, Morgan B, Sweeney JD, Weiler L. Behavior and survival of western spruce budworm,Choristoneura occidentalis Freeman, exposed to an ω-fluorinated pheromone analogue. J Chem Ecol 1989; 15:91-103. [DOI: 10.1007/bf02027776] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/1987] [Accepted: 10/29/1987] [Indexed: 11/29/2022]
|
45
|
Chemical studies of proteins that degrade pheromones. J Chem Ecol 1988; 14:2033-46. [DOI: 10.1007/bf01014248] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/1988] [Indexed: 10/25/2022]
|
46
|
Kulcsár P, Prestwich GD. Fluorography of tritium-labeled proteins in silver-stained polyacrylamide gels. Anal Biochem 1988; 170:528-31. [PMID: 2456027 DOI: 10.1016/0003-2697(88)90668-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Silver-staining of polyacrylamide gel electrophoresis (PAGE)-separated proteins allows sensitive detection of proteins but severely reduces the ability to detect weak beta-emitters present in the protein band. A simple procedure is described in which silver can be removed from a silver-stained PAGE gel (deargentation) using photographic fixer, and the silver-free gel can be enhanced and used for fluorography. A quantitative study of sensitivity is reported for 3H-labeled bovine serum albumin with a one-dimensional sodium dodecyl sulfate-PAGE slab gel.
Collapse
Affiliation(s)
- P Kulcsár
- Department of Chemistry, State University of New York, Stony Brook 11794-3400
| | | |
Collapse
|
47
|
Haloacetate analogs of pheromones: Effects on catabolism and electrophysiology inPlutella xylostella. J Chem Ecol 1988; 14:1003-21. [DOI: 10.1007/bf01018789] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/1987] [Accepted: 06/01/1987] [Indexed: 10/25/2022]
|
48
|
Synthesis of carrier-free tritium-labeled queen bee pheromone. J Chem Ecol 1988; 14:957-62. [DOI: 10.1007/bf01018786] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/1987] [Accepted: 05/17/1987] [Indexed: 11/25/2022]
|
49
|
Kulcsár P, Prestwich GD. Detection and microsequencing of juvenile hormone-binding proteins of an insect by the use of an iodinated juvenile hormone analog. FEBS Lett 1988; 228:49-52. [PMID: 3342877 DOI: 10.1016/0014-5793(88)80582-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An [125I]iodinated juvenile hormone (JH) analog can be used as a sensitive and highly selective probe for the visualization of high-affinity, (JH)-specific binding proteins from insect hemolymph samples. The proteins can be detected in their native form using a two-dimensional (isoelectric focusing then native gradipore gel) separation of the crude protein mixture containing the 125I-labeled iodinated JH analog. The proteins can be transferred to activated glass fiber paper by electroblotting, and the location of the bound gamma-emitter can be found by exposure of the dried gel or the electroblot to X-ray film. The radiolabeled protein spot can be excised from the Coomassie-stained glass fiber paper and subjected directly to gas-phase N-terminal amino acid sequencing. This non-destructive, non-denaturing technique may have wide applicability in identifying and sequencing ligand-specific binding proteins in complex mixtures.
Collapse
Affiliation(s)
- P Kulcsár
- Department of Chemistry, State University of New York, Stony Brook 11794-3400
| | | |
Collapse
|
50
|
|