title: Molecular cloning and characterization of prolyl endopeptidase from human T cells.
abstract: The prolyl endopeptidase (PEP) gene of human T cells was amplified by the PCR method and cloned in Escherichia coli. The complete gene consisted of 2,130 nucleotides corresponding to 710 amino acid residues with a calculated molecular mass of 80,750. The nucleotide sequence of this clone revealed that T cell PEP DNA is 48, 50, and 91% homologous to those of Flavobacterium meningosepticum, Aeromonas hydrophila, and porcine brain PEP, respectively. This gene was fused to the lacZ sequence from E. coli and expressed as a fused protein in E. coli. This fused protein exhibited PEP activity, which was inhibited by Z-Pro-prolinal, a specific inhibitor of PEP. The fused protein was purified on a beta-galactosidase specific affinity column. A polyclonal antibody was raised against the purified protein. Immunological characterization suggested that this protein is different from cytosol-soluble PEP.
authors.affiliation: Yakult Central Institute for Microbiological Research, Tokyo.
authors.forename: Y
authors.initials: Y
authors.lastname: Shirasawa
authors.forename: T
authors.initials: T
authors.lastname: Osawa
authors.forename: A
authors.initials: A
authors.lastname: Hirashima
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D002478:Cells, Cultured; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000201:enzymology; D006801:Humans; D008969:Molecular Sequence Data; D000085822:Prolyl Oligopeptidases; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D012697:Serine Endopeptidases / Q000097:blood / Q000235:genetics*; D013552:Swine / Q000378:metabolism; D013601:T-Lymphocytes / Q000201:enzymology*
chemical_list: D012697:Serine Endopeptidases; C000705287:PREPL protein, human; D000085822:Prolyl Oligopeptidases