||It has been suggested that Anosmin-1 be merged into this article. (Discuss) Proposed since June 2015.|
|Kallmann syndrome 1 sequence|
|Alt. symbols||KAL, ADMLX|
|Locus||Chr. X p22.32|
The KAL1 gene is a human gene which is located on the X chromosome at Xp22.3 and is affected in some individuals with Kallmann syndrome. This gene codes for a protein named anosmin-1, which is responsible for migration of certain nerve cell precursors during embryogenesis. Deletion or mutation of this gene results in loss of the functional protein and affects the proper development of the olfactory system. In addition, neural cells which produce GnRH fail to incorporate into the hypothalamus.
Clinically, mutation results in the X-linked form of Kallmann syndrome. Individuals with Kallmann syndrome experience anosmia (lack of smell) and do not go through puberty (hypothalamic hypogonadotropic hypogonadism).
- del Castillo I, Cohen-Salmon M, Blanchard S, Lutfalla G, Petit C. Structure of the X-linked Kallmann syndrome gene and its homologous pseudogene on the Y chromosome. Nat Genet. 1992 Dec;2(4):305-10. PMID 1303284