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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Limb malformations and the human HOX genes.

HOX genes encode a family of transcription factors of fundamental importance for body patterning during embryonic development. Humans, like most vertebrates, have 39 HOX genes organized into four clusters, with major roles in the development of the central nervous system, axial skeleton, gastrointestinal and urogenital tracts, external genitalia, and limbs. The first two limb malformations shown to be caused by mutations in the human HOX genes were synpolydactyly and hand-foot-genital syndrome, which result from mutations in HOXD13 and HOXA13, respectively. This review describes a variety of limb malformations now known to be caused by specific different mutations in these two genes, including polyalanine tract expansions, nonsense mutations, and missense mutations, many with phenotypic consequences that could not have been predicted from previous knowledge of mouse models or HOX protein function. Limb malformations may also result from chromosomal deletions involving the HOXD and HOXA clusters, and from regulatory mutations affecting single or multiple HOX genes.[1]


  1. Limb malformations and the human HOX genes. Goodman, F.R. Am. J. Med. Genet. (2002) [Pubmed]
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