title: Conserved sequence pattern in a wide variety of phosphoesterases.
abstract: A unique sequence pattern, designated the GD/GNH signature, was shown to be conserved in a wide variety of phosphoesterases. The enzymes containing this signature cleave phosphoester bonds in such different substrates as (1) phosphoserine and phosphothreonine in polypeptides; (2) bis(5'-nucleosidyl)-tetraphosphates; (3) nucleoside 5' phosphates; (4) 2',3'-cyclic nucleotide phosphates; (5) polynucleotides; (6) 2'-5' phosphodiesters in RNA (intron) lariats; (7) sphingomyelin; and (7) various phosphomonoesters. Two conserved acidic amino acid residues and a conserved histidine residue may be directly involved in phosphoester bond cleavage.
authors.affiliation: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894.
authors.forename: E V
authors.initials: EV
authors.lastname: Koonin
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001419:Bacteria / Q000201:enzymology; D017124:Conserved Sequence; D005658:Fungi / Q000201:enzymology; D006801:Humans; D008969:Molecular Sequence Data; D010727:Phosphoric Diester Hydrolases / Q000737:chemistry*; D010744:Phosphoric Monoester Hydrolases / Q000737:chemistry*; D010944:Plants / Q000201:enzymology; D013379:Substrate Specificity
chemical_list: D010744:Phosphoric Monoester Hydrolases; D010727:Phosphoric Diester Hydrolases