title: Anion-mediated lysine-arginine interaction. Evidence in Chaetopterus variopedatus sperm protamine.
abstract: Chaetopterus ariopedatus sperm protamine is a stable oligomer. Specific amino acid side chain modifications show that the oligomeric structure depends on anion-mediated lysine-arginine interactions. The occurrence of this type of interaction is confirmed by the finding that poly-L-arginine readily forms aggregates with poly-L-lysine or with the native but not with the protamine with carbamylated epsilon-amino groups.
authors.affiliation: Department of Genetics, General and Molecular Biology, University of Naples Federico II, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Piscopo
authors.forename: L
authors.initials: L
authors.lastname: Tomei
authors.forename: L
authors.initials: L
authors.lastname: De Petrocellis
authors.forename: G
authors.initials: G
authors.lastname: Geraci
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D000838:Anions; D001120:Arginine / Q000378:metabolism*; D002850:Chromatography, Gel; D008239:Lysine / Q000378:metabolism*; D008297:Male; D011077:Polychaeta; D011479:Protamines / Q000737:chemistry / Q000378:metabolism*; D013094:Spermatozoa / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D000838:Anions; D011479:Protamines; D001120:Arginine; D008239:Lysine