title: A polymorphic L1 retroposon insertion in the centromere of the human Y chromosome.
abstract: We have identified a novel polymorphic L1 retroposon insertion, designated LY1, in the centromeric alphoid array of the human Y chromosome. The element belongs to the transpositionally active Ta subset and its presence is compatible with normal centromere function. It was found at highest frequency in China, where it accounts for 23% of the Han sample, and was present at low frequencies in the surrounding areas, but was not found at all outside Asia. Chromosomes carrying LY1 show considerable microsatellite diversity, suggesting an ancient origin for the lineage at approximately 10 000 years ago (with wide confidence limits), but only limited subsequent migration.
authors.affiliation: Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
authors.forename: F R
authors.initials: FR
authors.lastname: Santos
authors.forename: A
authors.initials: A
authors.lastname: Pandya
authors.forename: M
authors.initials: M
authors.lastname: Kayser
authors.forename: R J
authors.initials: RJ
authors.lastname: Mitchell
authors.forename: A
authors.initials: A
authors.lastname: Liu
authors.forename: L
authors.initials: L
authors.lastname: Singh
authors.forename: G
authors.initials: G
authors.lastname: Destro-Bisol
authors.forename: A
authors.initials: A
authors.lastname: Novelletto
authors.forename: R
authors.initials: R
authors.lastname: Qamar
authors.forename: S Q
authors.initials: SQ
authors.lastname: Mehdi
authors.forename: R
authors.initials: R
authors.lastname: Adhikari
authors.forename: P
authors.initials: P
authors.lastname: de Knijff
authors.forename: C
authors.initials: C
authors.lastname: Tyler-Smith
mesh_terms: D001483:Base Sequence; D002503:Centromere / Q000235:genetics*; D003360:Cosmids; D016521:Electrophoresis, Gel, Pulsed-Field; D014644:Genetic Variation; D005843:Geography; D006801:Humans; D020084:Long Interspersed Nucleotide Elements; D008297:Male; D018895:Microsatellite Repeats; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D015183:Restriction Mapping; D014998:Y Chromosome / Q000235:genetics*