title: Ultrastructural and molecular identification of a Wolbachia endosymbiont in a spider, Nephila clavata.
abstract: Wolbachia-like bacteria were observed in the egg cells of golden orb-weaving spider, Nephila clavata, by means of transmission electron microscopy. The bacteria exhibited the typical morphology of Wolbachia, including three enveloping membranes. Based on the amplification and sequencing of partial 16S rDNA and ftsZ gene, the bacteria were identified as Wolbachia, intracellular, transovarially inherited alpha-proteobacteria in invertebrates. Phylogenetic analysis based on 16S rDNA and ftsZ gene sequences invariably indicated that the intracellular bacteria from N. clavata belonged to group A Wolbachia, which were found only from insects. Clustering of Wolbachia from N. clavata with group A Wolbachia indicates that the bacteria were probably transferred horizontally between insects and the spider.
authors.affiliation: Insect Resources Laboratory, Korean Collection for Type Cultures, KoreaResearch Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea.
authors.forename: H W
authors.initials: HW
authors.lastname: Oh
authors.forename: M G
authors.initials: MG
authors.lastname: Kim
authors.forename: S W
authors.initials: SW
authors.lastname: Shin
authors.forename: K S
authors.initials: KS
authors.lastname: Bae
authors.forename: Y J
authors.initials: YJ
authors.lastname: Ahn
authors.forename: H Y
authors.initials: HY
authors.lastname: Park
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics; D003598:Cytoskeletal Proteins; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005260:Female; D005798:Genes, Bacterial; D008854:Microscopy, Electron; D008969:Molecular Sequence Data; D010063:Ovum / Q000382:microbiology; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013112:Spiders / Q000382:microbiology*; D013559:Symbiosis; D020577:Wolbachia / Q000145:classification* / Q000235:genetics / Q000648:ultrastructure*
chemical_list: D001426:Bacterial Proteins; D003598:Cytoskeletal Proteins; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; C071525:FtsZ protein, Bacteria; D012336:RNA, Ribosomal, 16S