title: Characterization and electrotransformation of Lactobacillus crispatus isolated from chicken crop and intestine.
abstract: Lactic acid bacteria originating in the intestine have recently undergone intensive study for their potential probiotic properties. Here partial 16S rRNA gene sequencing of 8 Lactobacillus strains proved them to be Lactobacillus crispatus. Fatty acid analysis confirmed strains being closely related. These strains and type strain ATCC33820 were characterized for genetic engineering potential, thus determining aerobic growth, erythromycin sensitivity, and glycine tolerance. Out of 5 plasmids, a 2.9-kb plasmid (pLEB579) was successfully introduced into 4 chicken-originated wild-type L. crispatus strains. Transformation frequency was approximately 30 transformants per microgram of DNA, the first reported electrotransformation into chicken-originated L. crispatus. In spite of its low frequency, transformation enables bioengineering of these strains to improve the probiotic function in feed adsorption, chicken health, and food safety.
authors.affiliation: Division of Microbiology, Department of Applied Chemistry and Microbiology, University of Helsinki, 00014-FIN, Finland.
authors.forename: S S
authors.initials: SS
authors.lastname: Beasley
authors.forename: T M
authors.initials: TM
authors.lastname: Takala
authors.forename: J
authors.initials: J
authors.lastname: Reunanen
authors.forename: J
authors.initials: J
authors.lastname: Apajalahti
authors.forename: P E J
authors.initials: PE
authors.lastname: Saris
mesh_terms: D000818:Animals; D001483:Base Sequence; D002645:Chickens / Q000382:microbiology*; D003426:Crop, Avian / Q000382:microbiology*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D018274:Electroporation; D005998:Glycine / Q000378:metabolism; D007421:Intestine, Small / Q000382:microbiology*; D007778:Lactobacillus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010802:Phylogeny; D010957:Plasmids; D019936:Probiotics; D012336:RNA, Ribosomal, 16S / Q000032:analysis* / Q000737:chemistry; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity; D014169:Transformation, Bacterial
chemical_list: D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D005998:Glycine