title: The amino acid sequence of human sperm protamine P1.
abstract: Human sperm protamines have been extracted from spermatozoa pooled from several donors, converted to their S-pyridylethylated derivatives and resolved into two major components, P1 and P2, by Bio-Rex 70 chromatography. Protamine P1 was further purified by Bio-Gel P-10 chromatography and sequenced directly on a gas phase protein sequencer for 43 residues. To complete the sequence, P1 was cleaved at methionine 36 and the C-terminal tetradecapeptide was purified by h.p.l.c. and sequenced completely. The 50 residue sequence is: (sequence see text) This sequence has a calculated molecular weight of 6674 and is homologous with four other published mammalian protamine sequences.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005075:Biological Evolution; D002417:Cattle; D002852:Chromatography, Ion Exchange; D006801:Humans; D008297:Male; D051379:Mice; D011479:Protamines / Q000235:genetics / Q000302:isolation & purification*; D012756:Sheep; D013045:Species Specificity; D013094:Spermatozoa / Q000032:analysis*; D013552:Swine
chemical_list: D011479:Protamines; C046533:protamine P1