Identification of a novel mouse membrane-bound family 1 glycosidase-like protein, which carries an atypical active site structure.
We have identified a novel mouse gene klph (Klotho-LPH related protein; where LPH stands for lactase-phlorizin hydrolase) that encodes a novel mammalian family 1 glycosidase-like protein. KLPH was a putative type I membrane protein that consists of N-terminal signal sequence, glycosidase domain, transmembrane region and short cytoplasmic tail. Despite its overall structural similarity to other family 1 glycosidases, the glutamic acid for the acid-base catalyst was not conserved in this protein. klph mRNA was predominantly expressed in the kidney and skin. Epitope-tagged KLPH was localized to the perinuclear tubular network structure of the endoplasmic reticulum in cultured cells.
Ito
Shinji
S
Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.
Fujimori
Toshihiko
T
Hayashizaki
Yoshihide
Y
Nabeshima
Yo-ichi
Y
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D019556:COS Cells; D000939:Epitopes / Q000235:genetics / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D005810:Multigene Family; D016415:Sequence Alignment; D014018:Tissue Distribution
D000939:Epitopes; D008565:Membrane Proteins; D006026:Glycoside Hydrolases; C464522:Lctl protein, mouse