cDNA and deduced primary structure of basic phospholipase A2 with neurotoxic activity from the venom secretion of the Crotalus durissus collilineatus rattlesnake

Fagundes, Fábio H. R.; Oliveira, Márcia Rosa de; Huancahuire-Vega, Salomón; Romero-Vargas, Frey Francisco; Ponce-Soto, Luis Alberto; Marangoni, Sérgio

doi:10.1590/s0100-879x2010007500009

Cited by 3 publications

(2 citation statements)

References 32 publications

(29 reference statements)

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“…For years, crotoxin was considered to be composed only of PLA 2 and crotapotin subunits [53]. Nevertheless, improved techniques for the separation and characterization of proteins coupled with improvements in molecular biology analysis have raised scientific questions about the homogeneity of crotoxin [54].…”

Section: Resultsmentioning

confidence: 99%

Purification and Characterization of a Novel Factor of Crotoxin Inter-CRO (V-1), a New Phospholipase A2 Isoform from Crotalus durissus collilineatus Snake Venom Using an In Vitro Neuromuscular Preparation

et al. 2022

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The fractionation of Crotalus durissus collilineatus whole venom through an HPLC chromatographic method enabled the purification of a new V-1 neurotoxin. Inter-CRO (V-1) presents similarity in its primary structure to crotoxin B (CB), suggesting another isoform of this toxin. The aim of this study was to compare V-1 to the crotoxin complex (CA/CB) and CB to elucidate aspects related to its functionality. The homogeneity of the purified protein was confirmed with a molecular mass of 1425.45 Da, further verified by mass spectrometry. The sequence of the protein showed high similarity to other viperid snake venom PLA2 proteins. The results of this study report that V-1 is an uncharacterized novel toxin with different biological activities from CB. V-1 maintained catalytic activity but presented neurotoxic activity as observed by the 2.5-fold increase in twitch tension record compared to control values on isolated muscle cells.

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Section: Resultsmentioning

confidence: 99%

Purification and Characterization of a Novel Factor of Crotoxin Inter-CRO (V-1), a New Phospholipase A2 Isoform from Crotalus durissus collilineatus Snake Venom Using an In Vitro Neuromuscular Preparation

et al. 2022

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“…Sin embargo, las múltiples isoformas identificadas en el análisis proteómico, sugieren una gran diversidad de esta toxina dentro de una misma especie y con otras especies, como la observada en las diferentes isoformas aisladas de otras subespecies de C. durissus (32)(33)(34).…”

Section: Identificación De Proteínasunclassified

Efecto citotóxico de fosfolipasas A2 del veneno de Crotalus durissus cumanensis de Colombia

Quintana-Castillo¹,

Ávila-Gómez²,

Ceballos-Ruiz³

et al. 2017

Revista Investig. Salud Univ. Boyacá

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RESUMENIntroducción. Los venenos de serpientes representan una fuente importante de proteínas y péptidos, los cuales exhiben diversas actividades biológicas, tales como antibacterianas, antiparasitarias, antivirales, antitumorales, antifúngicas y contra la agregación plaquetaria, entre otras.Las fosfolipasas A2 presentes en los venenos de serpientes son las proteínas más estudiadas en estos modelos. Se ha demostrado que las fosfolipasas A2, activas e inactivas, poseen actividad catalítica contra células tumorales.Objetivo. Aislar, purificar y caracterizar la fosfolipasa A2 del veneno de Crotalus durissus cumanensis para evaluar su actividad antitumoral in vitro.Materiales y métodos. El aislamiento, la purificación y la identificación de la crotoxina B se hizo mediante la cromatografía de exclusión molecular, la cromatografía líquida de alto rendimiento de fase inversa (Reversed Phase High-Performance Liquid Chromatography, RP-HPLC) y la espectrometría de masas. El efecto citotóxico sobre células tumorales (K562) y células normales (células mononucleares de sangre periférica) se determinó utilizando la técnica de MTT.Resultados. La separación y posterior identificación de la crotoxina B del veneno de C. d. cumanensis de Colombia, permitieron evidenciar que esta fosfolipasa A2 posee efecto citotóxico sobre las células mononucleares de sangre periférica con una dosis de 18,23 ± 0,57 µg/ml, mientras que, para las células K562, fue de 2,34 ± 0,199 µg/ml.Conclusiones. Los resultados sugieren la posibilidad de utilizar la crotoxina B aislada del veneno de C.d. cumanensis como un posible recurso terapéutico para su aplicación en humanos.

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Full-Length Venom Protein cDNA Sequences from Venom-Derived mRNA: Exploring Compositional Variation and Adaptive Multigene Evolution

Modahl

Mackessy

2016

PLoS Negl Trop Dis

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Envenomation of humans by snakes is a complex and continuously evolving medical emergency, and treatment is made that much more difficult by the diverse biochemical composition of many venoms. Venomous snakes and their venoms also provide models for the study of molecular evolutionary processes leading to adaptation and genotype-phenotype relationships. To compare venom complexity and protein sequences, venom gland transcriptomes are assembled, which usually requires the sacrifice of snakes for tissue. However, toxin transcripts are also present in venoms, offering the possibility of obtaining cDNA sequences directly from venom. This study provides evidence that unknown full-length venom protein transcripts can be obtained from the venoms of multiple species from all major venomous snake families. These unknown venom protein cDNAs are obtained by the use of primers designed from conserved signal peptide sequences within each venom protein superfamily. This technique was used to assemble a partial venom gland transcriptome for the Middle American Rattlesnake (Crotalus simus tzabcan) by amplifying sequences for phospholipases A2, serine proteases, C-lectins, and metalloproteinases from within venom. Phospholipase A2 sequences were also recovered from the venoms of several rattlesnakes and an elapid snake (Pseudechis porphyriacus), and three-finger toxin sequences were recovered from multiple rear-fanged snake species, demonstrating that the three major clades of advanced snakes (Elapidae, Viperidae, Colubridae) have stable mRNA present in their venoms. These cDNA sequences from venom were then used to explore potential activities derived from protein sequence similarities and evolutionary histories within these large multigene superfamilies. Venom-derived sequences can also be used to aid in characterizing venoms that lack proteomic profiles and identify sequence characteristics indicating specific envenomation profiles. This approach, requiring only venom, provides access to cDNA sequences in the absence of living specimens, even from commercial venom sources, to evaluate important regional differences in venom composition and to study snake venom protein evolution.

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cDNA and deduced primary structure of basic phospholipase A2 with neurotoxic activity from the venom secretion of the Crotalus durissus collilineatus rattlesnake

Cited by 3 publications

References 32 publications

Purification and Characterization of a Novel Factor of Crotoxin Inter-CRO (V-1), a New Phospholipase A2 Isoform from Crotalus durissus collilineatus Snake Venom Using an In Vitro Neuromuscular Preparation

Purification and Characterization of a Novel Factor of Crotoxin Inter-CRO (V-1), a New Phospholipase A2 Isoform from Crotalus durissus collilineatus Snake Venom Using an In Vitro Neuromuscular Preparation

Efecto citotóxico de fosfolipasas A2 del veneno de Crotalus durissus cumanensis de Colombia

Full-Length Venom Protein cDNA Sequences from Venom-Derived mRNA: Exploring Compositional Variation and Adaptive Multigene Evolution

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