title: The human protein S locus: identification of the PS alpha gene as a site of liver protein S messenger RNA synthesis.
abstract: The protein S locus, situated on chromosome 3, consists of two protein S genes. Here, we report the cloning and complete nucleotide sequence of the 3'-untranslated region of the two genes designated PS alpha and PS beta. Both regions span approximately 1,200 nucleotides. They show a high degree (-97%) of homology, with deviations caused by small deletions, insertions and point mutations. Comparison of PS alpha and PS beta with the reported protein S liver cDNAs, shows that the latter all originate from the PS alpha gene. The PS alpha gene therefore is marked as the major site of synthesis of liver protein S mRNA. Sequence comparison with the bovine protein S cDNA reveals that the PS beta gene has accumulated a few more mutations than the PS alpha gene since duplication of the ancestral protein S gene that seems to have occurred recently during primate evolution.
authors.affiliation: Haemostasis and Thrombosis Research Unit, Leiden University Hospital, The Netherlands.
authors.forename: H K
authors.initials: HK
authors.lastname: Ploos van Amstel
authors.forename: P H
authors.initials: PH
authors.lastname: Reitsma
authors.forename: R M
authors.initials: RM
authors.lastname: Bertina
mesh_terms: D000818:Animals; D010582:Bacteriophage lambda / Q000235:genetics; D001483:Base Sequence; D015139:Blotting, Southern; D002417:Cattle; D002893:Chromosomes, Human, Pair 3; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D006023:Glycoproteins / Q000235:genetics*; D006801:Humans; D008099:Liver / Q000378:metabolism*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D017293:Protein S; D012333:RNA, Messenger / Q000096:biosynthesis*; D012689:Sequence Homology, Nucleic Acid
chemical_list: D006023:Glycoproteins; D017293:Protein S; D012333:RNA, Messenger; D004247:DNA