title: Exo- and surface proteomes of the probiotic bacterium Lactobacillus acidophilus NCFM.
abstract: Lactobacillus acidophilus NCFM is a well-known probiotic bacterium extensively studied for its beneficial health effects. Exoproteome (proteins exported into culture medium) and surface proteome (proteins attached to S-layer) of this probiotic were identified by using 2DE followed by MALDI TOF MS to find proteins potentially involved in bacteria-host interactions. The exo- and surface proteomes included 43 and 39 different proteins from 72 and 49 successfully identified spots, respectively. Twenty-two proteins were shared between the two proteomes; both contained the major surface layer protein that participates in host interaction as well as several well-known and putative moonlighting proteins. The exoproteome contained nine classically-secreted (containing a signal sequence) and ten nonclassically-secreted proteins, while the surface proteome contained four classically-secreted and eight nonclassically secreted proteins. Identification of exo- and surface proteomes contributes describing potential protein-mediated probiotic-host interactions.
authors.affiliation: Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors.forename: Hasan Ufuk
authors.initials: HU
authors.lastname: Celebioglu
authors.affiliation: Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors.forename: Birte
authors.initials: B
authors.lastname: Svensson
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D007779:Lactobacillus acidophilus / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism*; D019936:Probiotics / Q000378:metabolism*; D020543:Proteome / Q000378:metabolism*; D040901:Proteomics / Q000379:methods
chemical_list: D001426:Bacterial Proteins; D008565:Membrane Proteins; D020543:Proteome
keywords: Moonlighting proteins; Probiotics; Secreted proteins; Subproteome; Surface proteins