Two additional reports of deletion on the short arm of the Y chromosome.
Deletions on the short arm of the Y chromosome involving the amelogenin Y gene (AMELY), located on Yp11.2, can be misleading for sex typing with serious consequences in forensic applications and prenatal diagnosis. In this study, we describe two AMELY null cases concerning two unrelated Italian males from Northeast Italy. PCR amplification of short tandem repeats on the Y chromosome (Y-STRs) showed a lack of AMELY and DYS458 markers. The presence of all the other markers located on the Y chromosome and of the SRY gene in both samples led us to conclude that a deletion had occurred in a portion of the short arm of the Y chromosome. Twenty-three Y-specific sequence tagged sites (STSs) were chosen to delineate the deletion's length, which was estimated to be in the range of 3.35-3.87Mb for one sample and 1.51-2.58Mb for the other. These and previous findings suggest that in all cases where potential AMELY drop out has occurred, it should be used additional specific Y chromosome markers or human DNA quantification methods that specifically quantify male DNA using target male genomic markers, which not being located within the deletion regions, allow an accurate sex identification.
Department of Public Health and Community Medicine, Institute of Legal Medicine, Forensic Genetic Laboratory, University of Verona, Policlinico GB Rossi, Piazzale LA Scuro, 10, 37134 Verona, Italy. stefania.turrina@univr.it
Stefania
S
Turrina
Giulia
G
Filippini
Gianfranco
G
Voglino
Domenico
D
De Leo
D000328:Adult; D001483:Base Sequence; D002872:Chromosome Deletion; D041322:Chromosomes, Human, Y; D017931:DNA Primers; D006801:Humans; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics; D016133:Polymerase Chain Reaction
D017931:DNA Primers