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You Y, Tang Y, Yin W, Liu X, Gao P, Zhang C, Tembrock LR, Zhao Y, Yang Z. From genome to proteome: Comprehensive identification of venom toxins from the Chinese funnel-web spider (Macrothelidae: Macrothele yani). Int J Biol Macromol 2024; 268:131780. [PMID: 38657926 DOI: 10.1016/j.ijbiomac.2024.131780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 03/26/2024] [Accepted: 04/21/2024] [Indexed: 04/26/2024]
Abstract
Macrothelidae is a family of mygalomorph spiders containing the extant genera Macrothele and Vacrothele. China is an important center of diversity for Macrothele with 65 % of the known species occurring there. Previous work on Macrothele was able to uncover several important toxin compounds including Raventoxin which may have applications in biomedicine and agricultural chemistry. Despite the importance of Macrothele spiders, high-quality reference genomes are still lacking, which hinders our understanding and application of the toxin compounds. In this study, we assembled the genome of the Macrothele yani to help fill gaps in our understanding of toxin biology in this lineage of spiders to encourage the future study and applications of these compounds. The final assembled genome was 6.79 Gb in total length, had a contig N50 of 21.44 Mb, and scaffold N50 of 156.16 Mb. Hi-C scaffolding assigned 98.19 % of the genome to 46 pseudo-chromosomes with a BUSCO score of 95.7 % for the core eukaryotic gene set. The assembled genome was found to contain 75.62 % repetitive DNA and a total of 39,687 protein-coding genes were annotated making it the spider genome with highest number of genes. Through integrated analysis of venom gland transcriptomics and venom proteomics, a total of 194 venom toxins were identified, including 38 disulfide-rich peptide neurotoxins, among which 12 were ICK knottin peptides. In summary, we present the first high-quality genome assembly at the chromosomal level for any Macrothelidae spider, filling an important gap in our knowledge of these spiders. Such high-quality genomic data will be invaluable as a reference in resolving Araneae spider phylogenies and in screening different spider species for novel compounds applicable to numerous medical and agricultural applications.
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Affiliation(s)
- Yongming You
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China
| | - Yani Tang
- Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, South Waihuan Road, Chenggong District, Kunming 650500, China; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming 650500, China
| | - Wenhao Yin
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China
| | - Xinxin Liu
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China
| | - Pengfei Gao
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China
| | - Chenggui Zhang
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China
| | - Luke R Tembrock
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO 80523, USA..
| | - Yu Zhao
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China.
| | - Zizhong Yang
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R & D, Dali University, Dali 671000, China; National-Local Joint Engineering Research Center of Entomoceutics, Dali University, Dali 671000, China; Innovative Team of Dali University for Medicinal Insects & Arachnids Resources Digital Development, Dali 671000, China.
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Richards NJ, Alqallaf A, Mitchell RD, Parnell A, Haidar HB, Almeida JR, Williams J, Vijayakumar P, Balogun A, Matsakas A, Trim SA, Patel K, Vaiyapuri S. Indian Ornamental Tarantula ( Poecilotheria regalis) Venom Affects Myoblast Function and Causes Skeletal Muscle Damage. Cells 2023; 12:2074. [PMID: 37626884 PMCID: PMC10453882 DOI: 10.3390/cells12162074] [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: 06/12/2023] [Revised: 08/03/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Envenomation by the Indian ornamental tarantula (Poecilotheria regalis) is medically relevant to humans, both in its native India and worldwide, where they are kept as pets. Muscle-related symptoms such as cramps and pain are commonly reported in humans following envenomation by this species. There is no specific treatment, including antivenom, for its envenomation. Moreover, the scientific knowledge of the impact of this venom on skeletal muscle function is highly limited. Therefore, we carried out this study to better understand the myotoxic properties of Poecilotheria regalis venom by determining its effects in cultured myoblasts and in the tibialis anterior muscle in mice. While there was no effect found on undifferentiated myoblasts, the venom affected differentiated multinucleated myotubes resulting in the reduction of fusion and atrophy of myotubes. Similarly, intramuscular administration of this venom in the tibialis anterior muscle in mice resulted in extensive muscle damage on day 5. However, by day 10, the regeneration was evident, and the regeneration process continued until day 20. Nevertheless, some tissue abnormalities including reduced dystrophin expression and microthrombi presence were observed on day 20. Overall, this study demonstrates the ability of this venom to induce significant muscle damage and affect its regeneration in the early stages. These data provide novel mechanistic insights into this venom-induced muscle damage and guide future studies to isolate and characterise individual toxic component(s) that induce muscle damage and their significance in developing better therapeutics.
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Affiliation(s)
- Nicholas J. Richards
- School of Biological Sciences, University of Reading, Reading RG6 6UB, UK; (N.J.R.); (A.A.); (A.P.); (H.B.H.)
| | - Ali Alqallaf
- School of Biological Sciences, University of Reading, Reading RG6 6UB, UK; (N.J.R.); (A.A.); (A.P.); (H.B.H.)
- Medical Services Authority, Ministry of Defence, Kuwait City 13012, Kuwait
| | | | - Andrew Parnell
- School of Biological Sciences, University of Reading, Reading RG6 6UB, UK; (N.J.R.); (A.A.); (A.P.); (H.B.H.)
- Micregen Ltd., Thames Valley Science Park, Reading RG2 9LH, UK;
| | - Husain Bin Haidar
- School of Biological Sciences, University of Reading, Reading RG6 6UB, UK; (N.J.R.); (A.A.); (A.P.); (H.B.H.)
| | - José R. Almeida
- School of Pharmacy, University of Reading, Reading RG6 6UB, UK; (J.R.A.); (J.W.); (P.V.)
| | - Jarred Williams
- School of Pharmacy, University of Reading, Reading RG6 6UB, UK; (J.R.A.); (J.W.); (P.V.)
| | - Pradeep Vijayakumar
- School of Pharmacy, University of Reading, Reading RG6 6UB, UK; (J.R.A.); (J.W.); (P.V.)
| | - Adedoyin Balogun
- Molecular Physiology Laboratory, Centre for Biomedicine, Hull York Medical School, Hull HU6 7RX, UK
| | - Antonios Matsakas
- Molecular Physiology Laboratory, Centre for Biomedicine, Hull York Medical School, Hull HU6 7RX, UK
| | | | - Ketan Patel
- School of Biological Sciences, University of Reading, Reading RG6 6UB, UK; (N.J.R.); (A.A.); (A.P.); (H.B.H.)
| | - Sakthivel Vaiyapuri
- School of Pharmacy, University of Reading, Reading RG6 6UB, UK; (J.R.A.); (J.W.); (P.V.)
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Vásquez-Escobar J, Romero-Gutiérrez T, Morales JA, Clement HC, Corzo GA, Benjumea DM, Corrales-García LL. Transcriptomic Analysis of the Venom Gland and Enzymatic Characterization of the Venom of Phoneutria depilata (Ctenidae) from Colombia. Toxins (Basel) 2022; 14:toxins14050295. [PMID: 35622542 PMCID: PMC9144723 DOI: 10.3390/toxins14050295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/27/2022] [Accepted: 04/16/2022] [Indexed: 02/01/2023] Open
Abstract
The transcriptome of the venom glands of the Phoneutria depilata spider was analyzed using RNA-seq with an Illumina protocol, which yielded 86,424 assembled transcripts. A total of 682 transcripts were identified as potentially coding for venom components. Most of the transcripts found were neurotoxins (156) that commonly act on sodium and calcium channels. Nevertheless, transcripts coding for some enzymes (239), growth factors (48), clotting factors (6), and a diuretic hormone (1) were found, which have not been described in this spider genus. Furthermore, an enzymatic characterization of the venom of P. depilata was performed, and the proteomic analysis showed a correlation between active protein bands and protein sequences found in the transcriptome. The transcriptomic analysis of P. depilata venom glands show a deeper description of its protein components, allowing the identification of novel molecules that could lead to the treatment of human diseases, or could be models for developing bioinsecticides.
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Affiliation(s)
- Julieta Vásquez-Escobar
- Grupo de Toxinología y Alternativas Farmacéuticas y Alimentarias, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, Medellin 1226, Colombia;
- Correspondence: (J.V.-E.); (L.L.C.-G.)
| | - Teresa Romero-Gutiérrez
- Traslational Bioengineering Department, Exact Sciences and Engineering University Center, Universidad de Guadalajara, Guadalajara 44430, Mexico; (T.R.-G.); (J.A.M.)
| | - José Alejandro Morales
- Traslational Bioengineering Department, Exact Sciences and Engineering University Center, Universidad de Guadalajara, Guadalajara 44430, Mexico; (T.R.-G.); (J.A.M.)
| | - Herlinda C. Clement
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (H.C.C.); (G.A.C.)
| | - Gerardo A. Corzo
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (H.C.C.); (G.A.C.)
| | - Dora M. Benjumea
- Grupo de Toxinología y Alternativas Farmacéuticas y Alimentarias, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, Medellin 1226, Colombia;
| | - Ligia Luz Corrales-García
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (H.C.C.); (G.A.C.)
- Departamento de Alimentos, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, Medellin 1226, Colombia
- Correspondence: (J.V.-E.); (L.L.C.-G.)
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Ombati R, Luo L, Yang S, Lai R. Centipede envenomation: Clinical importance and the underlying molecular mechanisms. Toxicon 2018; 154:60-68. [DOI: 10.1016/j.toxicon.2018.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/21/2018] [Accepted: 09/25/2018] [Indexed: 12/11/2022]
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Choudhury M, Senthilvadivel V, Velmurugan D. Inhibitory effects of ascorbic acid toward snake venom metalloproteinase (SVMP) from Indian
Echis carinatus
venom: Insights from molecular modeling and binding studies. J Biochem Mol Toxicol 2018; 32:e22224. [DOI: 10.1002/jbt.22224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 05/16/2018] [Accepted: 08/26/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Manisha Choudhury
- Centre of Advanced Studies in Crystallography and Biophysics, University of Madras, Guindy CampusChennai Tamil Nadu India
| | - Vajravijayan Senthilvadivel
- Centre of Advanced Studies in Crystallography and Biophysics, University of Madras, Guindy CampusChennai Tamil Nadu India
| | - Devadasan Velmurugan
- Centre of Advanced Studies in Crystallography and Biophysics, University of Madras, Guindy CampusChennai Tamil Nadu India
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The diversity of venom components of the scorpion species Paravaejovis schwenkmeyeri (Scorpiones: Vaejovidae) revealed by transcriptome and proteome analyses. Toxicon 2018; 151:47-62. [DOI: 10.1016/j.toxicon.2018.06.085] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/20/2018] [Accepted: 06/25/2018] [Indexed: 12/11/2022]
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Evaluation of sample preparation protocols for spider venom profiling by MALDI-TOF MS. Toxicon 2017; 133:18-25. [DOI: 10.1016/j.toxicon.2017.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 03/22/2017] [Accepted: 04/11/2017] [Indexed: 11/20/2022]
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8
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Laustsen AH, Solà M, Jappe EC, Oscoz S, Lauridsen LP, Engmark M. Biotechnological Trends in Spider and Scorpion Antivenom Development. Toxins (Basel) 2016; 8:E226. [PMID: 27455327 PMCID: PMC4999844 DOI: 10.3390/toxins8080226] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 06/19/2016] [Accepted: 07/13/2016] [Indexed: 12/28/2022] Open
Abstract
Spiders and scorpions are notorious for their fearful dispositions and their ability to inject venom into prey and predators, causing symptoms such as necrosis, paralysis, and excruciating pain. Information on venom composition and the toxins present in these species is growing due to an interest in using bioactive toxins from spiders and scorpions for drug discovery purposes and for solving crystal structures of membrane-embedded receptors. Additionally, the identification and isolation of a myriad of spider and scorpion toxins has allowed research within next generation antivenoms to progress at an increasingly faster pace. In this review, the current knowledge of spider and scorpion venoms is presented, followed by a discussion of all published biotechnological efforts within development of spider and scorpion antitoxins based on small molecules, antibodies and fragments thereof, and next generation immunization strategies. The increasing number of discovery and development efforts within this field may point towards an upcoming transition from serum-based antivenoms towards therapeutic solutions based on modern biotechnology.
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Affiliation(s)
- Andreas Hougaard Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen East, Denmark.
| | - Mireia Solà
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Emma Christine Jappe
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Saioa Oscoz
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Line Præst Lauridsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Mikael Engmark
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
- Department of Bio and Health Informatics, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
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9
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Cheng TC, Long RW, Wu YQ, Guo YB, Liu DL, Peng L, Li DQ, Yang DW, Xu X, Liu FX, Xia QY. Identification and characterization of toxins in the venom gland of the Chinese bird spider, Haplopelma hainanum, by transcriptomic analysis. INSECT SCIENCE 2016; 23:487-499. [PMID: 26678257 DOI: 10.1111/1744-7917.12305] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/02/2015] [Indexed: 06/05/2023]
Abstract
Tarantula venoms provide a model system for studying toxin selectivity, structure-activity relationships and molecular evolution of peptide toxins. Previous studies have identified a large number of peptide toxins in the venom of the Chinese bird spider Haplopelma hainanum, generally regarded as a highly venomous spider. However, the lack of available RNA-seq transcriptomic and genomic data is an obstacle to understanding its venom at the molecular level. In this study, we investigated the venom gland transcriptome of H. hainanum by RNA-seq, in the absence of an available genomic sequence. We identified 201 potential toxins among 57 181 de novo assembled transcripts, including knottins, Kunitz-type toxins, enzymes and other proteins. We systematically identified most of the knottins and Kunitz-type toxins, some of which showed strongly biased expression in the venom gland, including members of the huwentoxin-1, huwentoxin-2 and magi-1 families. We also discovered several novel potential toxins. These data demonstrate the high molecular and structural diversity in the venom toxins of H. hainanum. This study offers a useful strategy for exploring the complex components of spider venoms.
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Affiliation(s)
- Ting-Cai Cheng
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - Ren-Wen Long
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - Yu-Qian Wu
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - You-Bing Guo
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - Duo-Lian Liu
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - Li Peng
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
| | - Dai-Qin Li
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Dai-Wen Yang
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Xin Xu
- College of Life Sciences, Hunan Normal University, Changsha, China
- College of Life Sciences, Hubei University, Wuhan, China
| | - Feng-Xiang Liu
- College of Life Sciences, Hubei University, Wuhan, China
| | - Qing-You Xia
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
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11
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Novel apigenin based small molecule that targets snake venom metalloproteases. PLoS One 2014; 9:e106364. [PMID: 25184206 PMCID: PMC4153592 DOI: 10.1371/journal.pone.0106364] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 07/31/2014] [Indexed: 02/07/2023] Open
Abstract
The classical antivenom therapy has appreciably reduced snakebite mortality rate and thus is the only savior drug available. Unfortunately, it considerably fails to shield the viper bite complications like hemorrhage, local tissue degradation and necrosis responsible for severe morbidity. Moreover, the therapy is also tagged with limitations including anaphylaxis, serum sickness and poor availability. Over the last decade, snake venom metalloproteases (SVMPs) are reported to be the primary component responsible for hemorrhage and tissue degradation at bitten site. Thus, antivenom inability to offset viper venom-induced local toxicity has been a basis for an insistent search for SVMP inhibitors. Here we report the inhibitory effect of compound 5d, an apigenin based molecule against SVMPs both in silico and in vivo. Several apigenin analogues are synthesized using multicomponent Ugi reactions. Among them, compound 5d effectively abrogated Echis carinatus (EC) venom-induced local hemorrhage, tissue necrosis and myotoxicity in a dose dependant fashion. The histopathological study further conferred effective inhibition of basement membrane degradation, and accumulation of inflammatory leucocytes at the site of EC venom inoculation. The compound also protected EC venom-induced fibrin and fibrinogen degradation. The molecular docking of compound 5d and bothropasin demonstrated the direct interaction of hydroxyl group of compound with Glu146 present in hydrophobic pocket of active site and does not chelate Zn2+. Hence, it is concluded that compound 5d could be a potent agent in viper bite management.
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Undheim EAB, King GF. On the venom system of centipedes (Chilopoda), a neglected group of venomous animals. Toxicon 2011; 57:512-24. [PMID: 21255597 DOI: 10.1016/j.toxicon.2011.01.004] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 12/08/2010] [Accepted: 01/11/2011] [Indexed: 12/16/2022]
Abstract
Centipedes are among the oldest extant terrestrial arthropods and are an ecologically important group of soil and leaf litter predators. Despite their abundance and frequent, often painful, encounters with humans, little is known about the venom and venom apparatus of centipedes, although it is apparent that these are both quite different from other venomous lineages. The venom gland can be regarded as an invaginated cuticle and epidermis, consisting of numerous epithelial secretory units each with its own unique valve-like excretory system. The venom contains several different enzymes, but is strikingly different to most other arthropods in that metalloproteases appear to be important. Myotoxic, cardiotoxic, and neurotoxic activities have been described, most of which have been attributed to high molecular weight proteins. Neurotoxic activities are also unusual in that G-protein coupled receptors often seem to be involved, either directly as targets of neurotoxins or indirectly by activating endogenous agonists. These relatively slow responses may be complemented by the rapid effects caused by histamines present in the venom and from endogenous release of histamines induced by venom cytotoxins. The differences probably reflect the ancient and independent evolutionary history of the centipede venom system, although they may also be somewhat exaggerated by the paucity of information available on this largely neglected group.
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Affiliation(s)
- Eivind A B Undheim
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.
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13
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‘Partitagin’, a unique β, γ-fibrinogenase that inhibits platelet aggregation from Hippasa partita spider venom. Blood Coagul Fibrinolysis 2011; 22:24-8. [DOI: 10.1097/mbc.0b013e32833fcc15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Devaraja S, Girish KS, Gowtham YNJ, Kemparaju K. The Hag-protease-II is a fibrin(ogen)ase from Hippasa agelenoides spider venom gland extract: purification, characterization and its role in hemostasis. Toxicon 2010; 57:248-58. [PMID: 21147144 DOI: 10.1016/j.toxicon.2010.11.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 11/24/2010] [Accepted: 11/26/2010] [Indexed: 10/18/2022]
Abstract
The current study describes the biochemical, biophysical and pharmacological properties of Hag-protease-II from Hippasa agelenoides spider venom gland extract. The Hag-protease-II was purified to homogeneity using gel filtration and ion-exchange chromatography. The molecular mass was found to be 28.749 kDa by MALDI-TOF mass spectrometry. PMSF abolished the activity while EDTA, EGTA, IAA and 1, 10-phenanthrolene did not. Hag-protease-II hydrolyzed casein, fibrinogen and fibrin, however it did not hydrolyze gelatin, fibronectin and collagen types- I and IV. It was non-lethal and devoid of hemorrhagic, myotoxic and edema forming activities. It dose dependently reduced re-calcification time of citrated human plasma. Strikingly; the Hag-protease-II coagulated the factor X deficient congenital human plasma. It hydrolyzed Bβ-chain but, did not degrade Aα- and γ-chains of fibrinogen while, it hydrolyzed α-polymer and α-chain but not the β-chain and γ-γ dimers of partially cross-linked fibrin clot. The Hag-protease-II induced aggregation of human platelets in PRP dose dependently, however it did not interfere in collagen induced aggregation of PRP and washed human platelets.
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Affiliation(s)
- S Devaraja
- Department of Biochemistry, Manasagangotri, University of Mysore, Mysore 570 006, India
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15
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Kumar RV, Gowda CDR, Shivaprasad HV, Siddesha JM, Sharath BK, Vishwanath BS. Purification and characterization of 'Trimarin' a hemorrhagic metalloprotease with factor Xa-like Activity, from Trimeresurus malabaricus snake venom. Thromb Res 2010; 126:e356-64. [PMID: 20850171 DOI: 10.1016/j.thromres.2010.07.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 07/17/2010] [Accepted: 07/30/2010] [Indexed: 11/17/2022]
Abstract
In the present study, we describe the purification and characterization of a metalloprotease 'trimarin' from Trimeresurus malabaricus snake venom. Trimarin is a single-chain basic protein, with a molecular mass of 29.6kDa. Trimarin showed proteolytic activity towards casein and fibrinogen, which was irreversibly inhibited by EDTA and 1,10-phenanthroline. The metal ion associated with trimarin was found to be Zn(2+). Trimarin exhibited pharmacological activities including hemorrhage, myotoxicity, procoagulant and factor Xa-like activities. The hemorrhage and myotoxicity correlated with degradation of extracellular protein components type-IV collagen and fibronectin. Myotoxicity due to muscle tissue necrosis was substantiated with increased serum CK activity. Trimarin showed procoagulant activity with reduced re-calcification time of citrated human plasma. Trimarin shortened the activated partial thromboplastin time (aPTT) and prothrombin time (PT), suggesting its involvement in common pathway of blood coagulation. Trimarin coagulated the citrated human plasma in the absence of CaCl(2), but it was lacking thrombin like activity as it did not clot the purified fibrinogen. Remarkably, the enzyme clotted the factor X deficient human plasma, suggesting that trimarin has factor Xa-like activity. Thus, trimarin may play a key role in the pathophysiological conditions that occur during T. malabaricus envenomation, and may be used as a biological tool to explore many facets of hemostasis.
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Affiliation(s)
- R Venkatesh Kumar
- Department of Studies in Bioscience, University of Mysore, Hemagangotri, Hassan-573201, Karnataka, India
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Devaraja S, Nagaraju S, Mahadeswaraswamy Y, Girish K, Kemparaju K. A low molecular weight serine protease: Purification and characterization from Hippasa agelenoides (funnel web) spider venom gland extract. Toxicon 2008; 52:130-8. [DOI: 10.1016/j.toxicon.2008.04.168] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Revised: 04/21/2008] [Accepted: 04/22/2008] [Indexed: 10/22/2022]
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