title: [Primary structure of the basic nuclear protein from spermatozoa of the mollusk Illex argentinus and its comparison with the structure of sperm proteins in other animals].
abstract: The spermatic protein of chromatin I2 of squid Illex argentinus was separated by HPLC into two components I2-1 and I2-2. Amino acid sequences of the major portion of protein I2-1 (52 residues) and the N-terminal sequence of protein I2-2 (21 residues) were determined. Arginines in protein I2-1 are arranged in clusters typical of protamines; the first cluster is in the N-terminus, the longest heterogeneous basic cluster is in the central part of the protein chain, the C-terminal part of the molecule contains two clusters of three hydroxyamino acids each. The N-terminal sequences of illexins I2-1 and I2-2 (1-14 residues) are highly homologous. Homologous regions were found in illexin I2-1, tunnin of tuna fish and avian gallin thus defining the notion of proteins of an intermediate type from mollusc spermatozoa chromatin exemplified by the squid protamine-like protein.
authors.forename: L A
authors.initials: LA
authors.lastname: Osadchuk
authors.forename: N B
authors.initials: NB
authors.lastname: Levina
authors.forename: I N
authors.initials: IN
authors.lastname: Telezhinskaia
authors.forename: S N
authors.initials: SN
authors.lastname: Khrapunov
authors.forename: G D
authors.initials: GD
authors.lastname: Berdyshev
authors.forename: N A
authors.initials: NA
authors.lastname: Aldanova
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D049832:Decapodiformes; D004591:Electrophoresis, Polyacrylamide Gel; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000032:analysis*; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity
chemical_list: D009687:Nuclear Proteins; C026588:sperm basic nuclear proteins
vernacular_title: Pervichnaia struktura osnovnogo iadernogo belka iz spermatozoidov golovonogogo molliuska Illex argentinus i sravnenie ee so strukturami spermal'nykh belkov drugikh zhivotnykh.