dc.creator | Borja-Oliveira C.R. | |
dc.creator | Kassab B.H. | |
dc.creator | Soares A.M. | |
dc.creator | Toyama M.H. | |
dc.creator | Giglio J.R. | |
dc.creator | Marangoni S. | |
dc.creator | Re L. | |
dc.creator | Rodrigues-Simioni L. | |
dc.date | 2007 | |
dc.date | 2015-06-30T18:52:30Z | |
dc.date | 2015-11-26T14:39:11Z | |
dc.date | 2015-06-30T18:52:30Z | |
dc.date | 2015-11-26T14:39:11Z | |
dc.date.accessioned | 2018-03-28T21:44:41Z | |
dc.date.available | 2018-03-28T21:44:41Z | |
dc.identifier | | |
dc.identifier | Journal Of Venomous Animals And Toxins Including Tropical Diseases. , v. 13, n. 1, p. 103 - 121, 2007. | |
dc.identifier | 16789199 | |
dc.identifier | 10.1590/S1678-91992007000100008 | |
dc.identifier | http://www.scopus.com/inward/record.url?eid=2-s2.0-34047213358&partnerID=40&md5=93fa8b9a335a3a3f13a48d59344f480d | |
dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/105194 | |
dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/105194 | |
dc.identifier | 2-s2.0-34047213358 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1249891 | |
dc.description | Two presynaptic phospholipases A2 (PLA2), neuwieditoxin-I (NeuTX-I) and neuwieditoxin-II (NeuTX-II), were isolated from the venom of Bothrops neuwiedi pauloensis (BNP). The venom was fractionated using molecular exclusion HPLC (Protein-Pak 300SW column), followed by reverse phase HPLC (μBondapak C18 column). Tricine-SDS-PAGE in the presence or absence of dithiothreitol showed that NeuTX-I and NeuTX-II had a molecular mass of approximately 14 kDa and 28kDa, respectively. At 10μg/ml, both toxins produced complete neuromuscular blockade in indirectly stimulated chick biventer cervicis isolated preparation without inhibiting the response to acetylcholine, but NeuTX-II reduced the response to KCl by 67.0±8.0% (n=3; p<0.05). NeuTX-I and NeuTX-II are probably responsible for the presynaptic neurotoxicity of BNP venom in vitro. In fact, using loose patch clamp technique for mouse phrenic nerve-diaphragm preparation, NeuTX-I produced a calcium-dependent blockade of acetylcholine release and caused appearance of giant miniature end-plate potentials (mepps), indicating a pure presynaptic action. The N-terminal sequence of NeuTX-I was DLVQFGQMILKVAGRSLPKSYGAYGCYCGWGGRGK (71% homology with bothropstoxin-II and 54% homology with caudoxin) and that of NeuTX-II was SLFEFAKMILEETKRLPFPYYGAYGCYCGWGGQGQPKDAT (92% homology with Basp-III and 62% homology with crotoxin PLA2). The fact that NeuTX-I has Q-4 (Gln-4) and both toxins have F-5 (Phe-5) and Y-28 (Tyr-28) strongly suggests that NeuTX-I and NeuTX-II are Asp49 PLA2. | |
dc.description | 13 | |
dc.description | 1 | |
dc.description | 103 | |
dc.description | 121 | |
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dc.language | en | |
dc.publisher | | |
dc.relation | Journal of Venomous Animals and Toxins Including Tropical Diseases | |
dc.rights | aberto | |
dc.source | Scopus | |
dc.title | Purification And N-terminal Sequencing Of Two Presynaptic Neurotoxic Pla2, Neuwieditoxin-i And Neuwieditoxin-ii, From Bothrops Neuwiedi Pauloensis (jararaca Pintada) Venom | |
dc.type | Artículos de revistas | |