Nat Genet. 1992 Dec;2(4):311-4.

Kallmann syndrome gene on the X and Y chromosomes: implications for evolutionary divergence of human sex chromosomes.

Incerti B, Guioli S, Pragliola A, Zanaria E, Borsani G, Tonlorenzi R, Bardoni B, Franco B, Wheeler D, Ballabio A, et al.

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Institute for Molecular Genetics, Baylor College of Medicine, Houston, Texas 77030.

Abstract

The recently identified gene for X-linked Kallmann syndrome (hypogonadotropic hypogonadism and anosmia) has a closely related homologue on the Y chromosome. The X and Y copies of this gene are located in a large region of X/Y homology, on Xp22.3 and Yq11.2, respectively. Comparison of the structure of the X-linked Kallmann syndrome gene and its Y homologue shed light on the evolutionary history of this region of the human sex chromosomes. Our data show that the Y homologue is not functional. Comparative analysis of X/Y sequence identity at several loci on Xp22.3 and Yq11.2 suggests that the homology between these two regions is the result of a complex series of events which occurred in the recent evolution of sex chromosomes.

PMID:: 1303285; [PubMed - indexed for MEDLINE]

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