251
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Bechis G, Granier C, Van Rietschoten J, Jover E, Rochat H, Miranda F. Purification of six neurotoxins from the venom of Dendroaspis viridis. Primary structure of two long toxins. EUROPEAN JOURNAL OF BIOCHEMISTRY 1976; 68:445-56. [PMID: 976267 DOI: 10.1111/j.1432-1033.1976.tb10832.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Six neurotoxins were purified from Dendroaspis viridis venom using gel filtration and equilibrium chromatography. The amino acid sequences of two of these neurotoxins (72 and 73 residues, five disulphide bridges) have been determined using almost exclusively automated Edman degradation. These two sequences are very similar: the only differences lies in the presence of one extra glycine at the C-terminal end of one of them. There is a good homology with the sequences of toxins now isolated from other Elapidae and Hydrophidae venoms.
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252
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Rochat H, Bechis G, Kopeyan C, Gregoire J, Rietschoten JV. Use of parvalbumin as a protecting protein in the sequenator: an easy and efficient way for sequencing small amounts of peptides. FEBS Lett 1976; 64:404-8. [PMID: 1278396 DOI: 10.1016/0014-5793(76)80337-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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253
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Couraud F, Rochat H, Lissitzky S. Stimulation of sodium and calcium uptake by scorpion toxin in chick embryo heart cells. BIOCHIMICA ET BIOPHYSICA ACTA 1976; 433:90-100. [PMID: 1260064 DOI: 10.1016/0005-2736(76)90180-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Scorpion toxins, the basic miniproteins of scorpion venom, stimulated the passive uptake of Na+ and Ca2+ in chick embryo heart cells. Half-maximum stimulation was obtained for 20-30 nM Na+ and 40-50 nM Ca2+. Scorpion toxin-activated Na+ and Ca2+ uptakes were fully inhibited by tetrodotoxin, a specific inhibitor of the action potential Na+ ionophore in excitable membranes. Half-maximum inhibition was obtained with the same concentration of tetrodotoxin (10 nM) for both Na+ and Ca2+. Scorpion toxin-stimulated Ca2+ uptake was dependent on extracellular Na+ concentration and was not inhibited by Ca2+ channel blocking drugs which are inactive on heart cell action potential. Thus, in heart cells scorpion toxin affects the passive Ca2+ transport, which is coupled to passive Na+ ionphore. Other results suggest that (1) tetrodotoxin and scorpion toxin bind to different sites of the sarcolemma and (2) binding of scorpion toxin to its specific sites may unmask latent tetrodotoxin - sensitive fast channels.
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254
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Kopeyan C, Miranda F, Rochat H. Amino-acid sequence of toxin III of Naja haje. EUROPEAN JOURNAL OF BIOCHEMISTRY 1975; 58:117-22. [PMID: 1183429 DOI: 10.1111/j.1432-1033.1975.tb02355.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The complete amino acid sequence of toxin III of Naja haje (72 residues) has been established mainly by use of a protein sequenator (identification of 70 residues). The two C-terminal residues have been determined by digestion with carboxypeptidases A and B. Addition of succinylated protein or peptide greatly improved the performance of the sequenator for the Edman degradation of peptides: on one peptide (39 residues) degradation went to step 34 with a protein program and on two peptides (10 and 13 residues) degradation reached the last amino acid with a peptide program (use of dimethylbenzylamine). Amino acid analysis of tryptic peptides obtained by digestion of the C-terminal cyanogen bromide peptide are in full agreement with the sequence established by automatic degradation. The sequence of toxin III of Naja haje is unique and is very similar to that of Naja nivea alpha (although there are 9 differences), of Naja melanoleuca b (11 differences) and also to that of Naja naja A (18 differences).
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255
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van Rietschoten J, Granier C, Rochat H, Lissitzky S, Miranda F. Synthesis of apamin, a neurotoxic peptide from bee venom. EUROPEAN JOURNAL OF BIOCHEMISTRY 1975; 56:35-40. [PMID: 1175625 DOI: 10.1111/j.1432-1033.1975.tb02204.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The apamin sequence has been synthesized by the solid-phase procedure. The synthetic peptide showed the same physiochemical and chemical properties as natural apamin in the following tests: paper electrophoresis, amino acid analyses after acid and enzymatic hydrolyses, sequence analysis, electrophoreses after tryptic and chymotryptic digestions. Synthetic apamin was as active as natural apamin in the neurotoxic assay in mice (LD50, after subcutaneous injection, for the 20-g mouse: 58 mug).
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256
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Zlotkin E, Martinez G, Rochat H, Miranda F. A protein toxic to crustacea from the venom of the scorpion Androctonus australis. ACTA ACUST UNITED AC 1975. [DOI: 10.1016/0020-1790(75)90062-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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257
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Romey G, Chicheportiche R, Lazdunski M, Rochat H, Miranda F, Lissitzky S. Scorpion neurotoxin - a presynaptic toxin which affects both Na+ and K+ channels in axons. Biochem Biophys Res Commun 1975; 64:115-21. [PMID: 1147916 DOI: 10.1016/0006-291x(75)90226-0] [Citation(s) in RCA: 118] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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258
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Capony JP, Rochat H, Pina MC, Pechère MF. [C-terminal sequence of a parvalbumin from rabbit muscle]. COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L'ACADEMIE DES SCIENCES. SERIE D: SCIENCES NATURELLES 1974; 279:1789-91. [PMID: 4218538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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259
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Martinez G, Rochat H, Ducet G. The amino acid sequence of cytochrome c from Solanum tuberosum (potato). FEBS Lett 1974; 47:212-7. [PMID: 4372092 DOI: 10.1016/0014-5793(74)81014-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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260
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Kopeyan C, Martinez G, Lissitzky S, Miranda F, Rochat H. Disulfide bonds of toxin II of the scorpion Androctonus australis Hector. EUROPEAN JOURNAL OF BIOCHEMISTRY 1974; 47:483-9. [PMID: 4611766 DOI: 10.1111/j.1432-1033.1974.tb03716.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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261
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Rochat H, Gregoire J, Martin-Moutot N, Menashe M, Kopeyan C, Miranda F. Purification of animal neurotoxins: isolation and characterization of three neurotoxins from the venom of Naja nigricollis mossambica peters. FEBS Lett 1974; 42:335-9. [PMID: 4853972 DOI: 10.1016/0014-5793(74)80759-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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262
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Kopevan C, van Rietschoten J, Martinez G, Rochat H, Miranda F. Characterization of five neurotoxins isolated from the venoms of two Elapidae snakes Naja haje and Naja nigricollis. EUROPEAN JOURNAL OF BIOCHEMISTRY 1973; 35:244-50. [PMID: 4736919 DOI: 10.1111/j.1432-1033.1973.tb02831.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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263
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Rochat H, Rochat C, Sampieri F, Miranda F, Lissitzky S. The amino-acid sequence of neurotoxin II of Androctonus australis Hector. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 28:381-8. [PMID: 4342910 DOI: 10.1111/j.1432-1033.1972.tb01924.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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264
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Rochat C, Sampieri F, Rochat H, Miranda F. Iodination of neurotoxins I and II of the scorpion Androctonus australis Hector. Biochimie 1972; 54:445-9. [PMID: 4646816 DOI: 10.1016/s0300-9084(72)80228-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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265
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Zlotkin E, Rochat H, Miranda F, Lissitzky S. Purification and properties of the insect toxin from the venom of the scorpion Androctonus australis Hector. Biochimie 1971; 53:1073-8. [PMID: 5150738 DOI: 10.1016/s0300-9084(71)80195-5] [Citation(s) in RCA: 123] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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266
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Miranda F, Kupeyan C, Rochat H, Rochat C, Lissitzky S. Purification of animal neurotoxins. Isolation and characterization of four neurotoxins from two different sources of Naja haje venom. EUROPEAN JOURNAL OF BIOCHEMISTRY 1970; 17:477-84. [PMID: 5531254 DOI: 10.1111/j.1432-1033.1970.tb01190.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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267
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Rochat H, Rochat C, Miranda F, Lissitzky S, Edman P. The amino acid sequence of neurotoxin I of Androctonus australis hector. EUROPEAN JOURNAL OF BIOCHEMISTRY 1970; 17:262-6. [PMID: 5500394 DOI: 10.1111/j.1432-1033.1970.tb01162.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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268
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Miranda F, Kupeyan C, Rochat H, Rochat C, Lissitzky S. Purification of animal neurotoxins. Isolation and characterization of eleven neurotoxins from the venoms of the scorpions Androctonus australis hector, Buthus occitanus tunetanus and Leiurus quinquestriatus quinquestriatus. EUROPEAN JOURNAL OF BIOCHEMISTRY 1970; 16:514-23. [PMID: 5477297 DOI: 10.1111/j.1432-1033.1970.tb01111.x] [Citation(s) in RCA: 299] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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269
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Rochat C, Rochat H, Edman P. Some S-alkyl derivatives of cysteine suitable for sequence determination by the phenylisothiocyanate technique. Anal Biochem 1970; 37:259-67. [PMID: 5476184 DOI: 10.1016/0003-2697(70)90046-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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270
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Rochat H, Rochat C, Kupeyan C, Miranda F, Lissitzky S, Edman P. Scorpion neurotoxins: A family of homologous proteins. FEBS Lett 1970; 10:349-351. [PMID: 11945430 DOI: 10.1016/0014-5793(70)80470-7] [Citation(s) in RCA: 88] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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271
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Rochat H, Rochat C, Miranda F, Lissitzky S. Presence of an identical amino acid sequence in the neurotoxins of Androctonus australis hector. Biochem Biophys Res Commun 1967; 29:107-12. [PMID: 6055175 DOI: 10.1016/0006-291x(67)90549-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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272
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Rochat C, Rochat H, Miranda F, Lissitzky S. Purification and some properties of the neurotoxins of Androctonus australis Hector. Biochemistry 1967; 6:578-85. [PMID: 6047642 DOI: 10.1021/bi00854a028] [Citation(s) in RCA: 89] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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273
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Miranda F, Rochat H, Rochat C, Lissitzky S. [Molecular complexes present in animal neurotoxins. 1. Neurotoxins of venoms of scorpions (Androctonus australis hector and Buthus occitanus tunetanus)]. Toxicon 1966; 4:123-44. [PMID: 6005045 DOI: 10.1016/0041-0101(66)90007-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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274
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Miranda F, Rochat H, Rochat C, Lissitzky S. [Attempted purification of neurotoxins of venoms of a South American scorpion (Tityus serrulatus L. and M.) by some chromatographic methods]. Toxicon 1966; 4:145-52. [PMID: 6005046 DOI: 10.1016/0041-0101(66)90008-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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