Chromosomal Mapping ofTmp(Emp1),Xmp(Emp2), andYmp(Emp3), Genes Encoding Membrane Proteins Related toPmp22 |
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| Authors: | Ittai Ben-Porath Christine A. Kozak Nissim Benvenisty |
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| Affiliation: | aDepartment of Genetics, The Institute of Life Sciences, The Hebrew University, Jerusalem, 91904, Israel;bLaboratory of Molecular Microbiology, National Institute of Allergy and Infectious Disease, Bethesda, Maryland, 20892 |
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| Abstract: | We have recently characterized a novel mammalian gene family, encoding membrane glycoproteins with four trans-membrane domains. This gene family includes the previously studiedPMP22,which is involved in the Charcot–Marie–Tooth neuropathy, and three novel genes:TMP, XMP,andYMP(HGMW-approved symbolsEMP1, EMP2andEMP3,respectively). TheTmp(tumor-associated membrane protein) gene was isolated from a c-mycinduced mouse brain tumor and is expressed in several highly proliferative cell types. We have now isolated cDNAs of the mouseXmpandYmpgenes and determined the chromosomal localization of mouseTmp, Xmp,andYmp. Tmpwas mapped to mouse chromosome 6,Xmpwas mapped to chromosome 16, andYmpwas mapped to chromosome 7.TmpandYmpmap to paralogous chromosomal regions, whereasXmpmaps to a chromosomal region that is putatively paralogous to a region on chromosome 11, to whichPmp22was previously mapped. These data suggest that this family of membrane glycoproteins evolved as a result of chromosomal duplications. |
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