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Amino Acid Sequence of an Excitatory Insect-selective Toxin (BmK IT) From Venom of the Scorpion Buthus martensi Karsch

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Science China Chemistry 1994年第1期37卷 42-49页

作者：吉永华 P. Mansuelle 徐科 C. Granier C. Kopeyan S. Terakawa H. Rochat Shanghai Institute of Physiology Academia Sinica Shanghai 200031 PRC laboratoire de biochemie cnrs ura 1455 inserm u 172 faculte de medcecine secteur nord BdPierre Dramard 13326 Marseille Cedex 15France

The insect-selective neurotoxin(BmK IT) of scorpion Buthus martensi Karsch was first reduced and S-alkylated, and then digested by TPCK-trypsin and Staphylococcus aureus V-8 Protease. The enzymatic peptides were purified on TLC-plastic sheet and submitted to determine their amino acid compositions and sequences. The sequence of the 70 amino acid residues of BmK IT was established with reference to the primary structure of AaH IT, another excitatory insect-selective toxin from the venom of North African scorpion Androctonus australis Hector. About 75% of the homologous sequence was found in the molecules of BmK IT and AaH IT. It is obvious that the results contribute toward better understanding of the molecular structure characteristics, structure/activity relationship of scorpion insect-selective toxins, and they can serve as the molecular basis for utilizing the toxins as a tool to clarify molecular mechanism involved in channel gating, and to infer the possibility of developing them as new selective bioinsecticides.

关键词： scorpion Buthus martensi Karsch insect-selective neurotoxin amino acid sequence structure/activity relationship.

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Genetic causes of macrozoospermia and proposal for an optimized genetic diagnosis strategy based on sperm parameters

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Journal of Genetics and Genomics 2023年第7期50卷 536-540页

作者： Alicia Coudert Caroline Cazin Amir Amiri-Yekta Selima Fourati Ben Mustapha Raoudha Zouari Julien Bessonat Abdelali Zoghmar Antoine Clergeau Catherine Metzler-Guillemain Chema Triki Herve Lejeune Nathalie Sermondade Eva Pipiras Nadia Prisant Isabelle Cedrin Leila Keskes Florence Lestrade Laetitia Hesters Nathalie Rives Beatrice Dorphin Agnes Guichet Catherine Patrat Emmanuel Dulioust Aur elie Feraille Franc ois Robert Eric Bieth Arthur Sorlin Jean-Pierre Siffroi Mariem Ben Khelifa Florence Boiterelle Sylvianne Hennebicq Veronique Satre Christophe Arnoult Charles Coutton Anne-Laure Barbotin Nicolas Thierry-Mieg Zine-Eddine Kherraf Pierre F.Ray Genetic Epigenetic and Therapies of Infertility Team Institute for Advanced BiosciencesInserm U 1209CNRS UMR 5309Universite Grenoble Alpes38000GrenobleFrance CHu Grenoble Alpes UM GI-DPI38000GrenobleFrance CHu Grenoble Alpes UM de Genetique Chromosomique38000GrenobleFrance department of Genetics Reproductive Biomedicine Research CenterRoyan Institute for Reproductive BiomedicineACECRTehranIran Polyclinique les Jasmins Centre d’Aide M edicale a la Procr eationCentre Urbain Nord1003TunisTunisia CHu Grenobles Alpes UF de Biologie de la Procr eation38000GrenobleFrance Reproduction Sciences and Surgery Clinique Ibn RochdConstantineAlgeria CHu Caen CECOS de CaenD epartement de BiologieUnit e de Biologie de la Reproduction14033CaenFrance APHM Hopital La-Conception P^ole Femmes-parents-enfantsCentre Clinico-biologique d’assistance M edicale a la Procr eation-CECOS13385 MarseilleFrance Aix-Marseille univ InsermMMGU125113385 Marseille Medical Genetics13385 MarseilleFrance Clinique Hannibal Centre d’AMPLes Berges du Lac1053TunisTunisia Reproductive Medicine department Hospices Civil de LyonLyonFrance Hopital Jean Verdier Universit e Sorbonne Paris NordParisFrance CHu de Pointe-a-Pitre/Abymes GuadeloupeFrance Service de Medecine de la Reproduction CHU Jean VerdierParisFrance faculte de M edecine de Sfax SfaxTunisia CHR Metz-Thionville Service d’Assistance Medicale a la Procr eation57530Ars-LaquenexyFrance unit of Reproductive Biology Antoine B ecl ere University HospitalUniversity Paris SudClamartParis-Sud UniversityLe Kremlin Bic^etreFrance univ Rouen Normandie Inserm U1239NorDICAdrenal and Gonadal PathophysiologyReproductive Biology Laboratory-CECOSRouen University Hospital76031Rouen CedexFrance CHAL Centre Hospitalier Alpes Leman Centre AMP7474130Contamine-sur-ArveFrance CHu Angers Service de Gen etique49933AngersINSERM U1083France Service de Biologie de la Reproduction-CECOS Hopital Cochin 74014ParisFrance IRH Medicentre Clinique du Val d’Ouest39

Macrozoospermia,characterized by the presence of largeheaded spermatozoa usually carrying several flagella,is one of the most severe phenotypes of male *** in most cases,the gametes are chromosomally abnormal and cannot be used for assisted reproductive technologies(ART)(Ray et al.,2017).In 2007,subjects from consanguineous families were shown to carry the same homozygous deleterious AuRKC variant(NM_001015878.2:c.144delC,later renamed c.145delC,***49TrpfsTer23),establishing AuRKC as the first and main gene associated with macrozoospermia(Dieterich et al.,2007).using flow cytometry,all spermatozoa from patients homozygous for the c.145delC variant were shown to be tetraploid,highlighting a cytokinesis blockage of the first meiotic divisions thus confirming that ART cannot be successful for these patients(Dieterich et al.,2009).

关键词： diagnosis establishing

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