The gene for the receptor for hyaluronan-mediated motility, RHAMM (designated hyaluronan-mediated motility receptor,HMMR(human) andHmmr(mouse), for mapping purposes), was localized to human chromosome 5q33.2-qter by somatic cell and radiation hybrid analyses. Investigation of two interspecific backcrosses localized the mouse RHAMM (Hmmr) locus 18 cM from the centromere of mouse chromosome 11 within a region of synteny homology with human chromosome 5q23-q35 genes. The map position of the human RHAMM gene places it in a region comparatively rich in disease-associated genes, including those for low-frequency hearing loss, dominant limb-girdle muscular dystrophy, diastrophic dysplasia, Treacher Collins syndrome, and myeloid disorders associated with the 5q- syndrome. The RHAMM gene location and its ability to transform cells when overexpressed implicate RHAMM as a possible candidate gene in the pathogenesis of the recently described t(5;14)(q33-q34;q11) acute lymphoblastic leukemias.
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