title: Characterization of a phiBP endolysin encoded by the Paenibacillus polymyxa CCM 7400 phage.
abstract: Endolysin (gp1.2) from the Paenibacillus polymyxa CCM 7400 temperate phage phiBP has a modular structure consisting of an N-terminal region with a catalytic glycosyl hydrolase 25 domain and a C-terminal cell wall-binding domain. The entire gene of this endolysin and fragments containing its catalytic and binding domains separately were cloned into expression vectors and the corresponding recombinant proteins were expressed in Escherichia coli and purified by affinity chromatography. The lytic activities of endolysin and its catalytic domain were tested on cell wall substrates from paenibacilli, bacilli, corynebacteria and E. coli. The presence of a cell wall-binding domain was found to be essential, as the phiBP endolysin was fully active only as a full-length protein. The binding ability of the cell wall-binding domain alone and in fusion with green fluorescent protein was demonstrated by specific binding assays to the cell surface of P. polymyxa CCM 7400 and to those of other Paenibacillus strains. Thus the ability of phiBP endolysin to hydrolyze the paenibacilli cell wall was confirmed.
authors.affiliation: Department of Genomics and Biotechnology, Institute of Molecular Biology, Slovak Academy of Sciences, Dubravská cesta 21, 845 51 Bratislava, Slovakia.
authors.forename: Jana
authors.initials: J
authors.lastname: Ugorcakova
authors.affiliation: Department of Genomics and Biotechnology, Institute of Molecular Biology, Slovak Academy of Sciences, Dubravská cesta 21, 845 51 Bratislava, Slovakia.
authors.forename: Livia
authors.initials: L
authors.lastname: Medzova
authors.affiliation: Department of Genomics and Biotechnology, Institute of Molecular Biology, Slovak Academy of Sciences, Dubravská cesta 21, 845 51 Bratislava, Slovakia.
authors.forename: Barbora
authors.initials: B
authors.lastname: Solteszova
authors.affiliation: Department of Genomics and Biotechnology, Institute of Molecular Biology, Slovak Academy of Sciences, Dubravská cesta 21, 845 51 Bratislava, Slovakia Gabriela.Bukovska@savba.sk.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Bukovska
mesh_terms: D000192:Actinomycetales / Q000378:metabolism; D000595:Amino Acid Sequence; D001407:Bacillus / Q000378:metabolism; D001433:Bacteriolysis; D001435:Bacteriophages / Q000201:enzymology* / Q000235:genetics*; D001665:Binding Sites; D020134:Catalytic Domain; D002473:Cell Wall / Q000378:metabolism; D019295:Computational Biology; D010450:Endopeptidases / Q000737:chemistry* / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D049452:Green Fluorescent Proteins / Q000235:genetics; D008856:Microscopy, Fluorescence; D056507:Paenibacillus / Q000254:growth & development / Q000378:metabolism / Q000648:ultrastructure / Q000821:virology*; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D011994:Recombinant Proteins / Q000737:chemistry; D016415:Sequence Alignment
chemical_list: D011994:Recombinant Proteins; D049452:Green Fluorescent Proteins; D010450:Endopeptidases; C001143:endolysin
keywords: bacteriophage; cell lysis; endolysin; fluorescence microscopy