title: Conserved residues in membrane-bound acid pyrophosphatase from Sulfolobus tokodaii, a thermoacidophilic archaeon.
abstract: A membrane-intrinsic acid pyrophosphatase (ST2226) from Sulfolobus tokodaii, a thermoacidophilic archaeon, is possibly involved in glycoprotein biosynthesis and belongs to the phosphatidic acid phosphatase class 2 superfamily, including both membrane-intrinsic and soluble enzymes with divergent functions ranging from dephosphorylation of undecaprenylpyrophosphate and phospho-monoesters such as glucose-6-phosphate to vanadium-containing chloroperoxidation. ST2226 is an archaeal ortholog of these enzymes sharing a common phosphatase motif. Through site-directed mutagenesis as to each of the conserved residues, the catalytic roles of the latter were deduced, as well as the transmembrane topology with all the conserved residues in close proximity to the outside of the membrane.
authors: Department of Biotechnology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
authors: Fumitoshi
authors: F
authors: Manabe
authors: Hirofumi
authors: H
authors: Shoun
authors: Takayoshi
authors: T
authors: Wakagi
mesh_terms: D019843:Archaeal Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D002462:Cell Membrane / Q000201:enzymology*; D003001:Cloning, Molecular; D017124:Conserved Sequence; D019298:Glucose-6-Phosphate / Q000378:metabolism; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D009154:Mutation; D010711:Phosphatidate Phosphatase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D010766:Phosphorylation; D011106:Polyisoprenyl Phosphates / Q000378:metabolism; D011487:Protein Conformation; D016415:Sequence Alignment; D020539:Sequence Analysis, Protein; D013329:Structure-Activity Relationship; D013379:Substrate Specificity; D016944:Sulfolobus / Q000145:classification / Q000201:enzymology* / Q000235:genetics
chemical_list: D019843:Archaeal Proteins; D011106:Polyisoprenyl Phosphates; C088139:undecaprenyl pyrophosphate; D019298:Glucose-6-Phosphate; D010711:Phosphatidate Phosphatase