Abstract: The present invention encompasses: [1] a DNA encoding the protein of any one of (i) a protein comprising the sequence of SEQ ID NO:1; (ii) a protein comprising a sequence with one to ten amino acid deletions, substitutions, or additions in the sequence of SEQ ID NO:1, and having fructosyl peptide oxidase activity; (iii) a protein comprising a sequence having 99% or higher homology to the sequence of SEQ ID NO:1, and having fructosyl peptide oxidase activity; and (iv) a protein having fructosyl peptide oxidase activity, which is encoded by an expression plasmid harbored by the strain deposited under Accession No. FERM BP-11026; [2] a DNA comprising the of SEQ ID NO: 2; and [3] a DNA that hybridizes under stringent conditions with a DNA comprising a sequence complementary to SEQ ID NO: 2, where the DNA encodes a protein having fructosyl peptide oxidase activity.

Abstract: The invention is directed to a protein comprising the amino acid sequence represented by SEQ ID NO: 1; a protein comprising an amino acid sequence with one to ten amino acid deletions, substitutions, or additions in the amino acid sequence represented by SEQ ID NO: 1, and having fructosyl peptide oxidase activity; a protein comprising an amino acid sequence having 99% or higher homology to the amino acid sequence represented by SEQ ID NO: 1, and having fructosyl peptide oxidase activity; and a protein having fructosyl peptide oxidase activity, which is encoded by an expression plasmid harbored by the Escherichia coli XL1-Blue MRF? strain deposited under Accession No. FERM BP-11026; as well as uses of such proteins.

Abstract: A protein described in any one of [1] to [4] below is provided according to the present invention: [1] a protein comprising the amino acid sequence represented by SEQ ID NO: 1; [2] a protein comprising an amino acid sequence with one or more amino acid deletions, substitutions, or additions in the amino acid sequence represented by SEQ ID NO: 1, and having fructosyl peptide oxidase activity; [3] a protein comprising an amino acid sequence having 80% or higher homology to the amino acid sequence represented by SEQ ID NO: 1, and having fructosyl peptide oxidase activity; and [4] a protein having fructosyl peptide oxidase activity, which is produced by an expression plasmid harbored by the Escherichia coli XL1-Blue MRF' strain deposited under Accession No. FERM BP-11026.