title: The meiosis-specific Xmr gene product is homologous to the lymphocyte Xlr protein and is a component of the XY body.
abstract: The Xlr (X-chromosome linked, lymphocyte regulated) multigene family was previously found to determine, in the lymphoid cell lineage, the stage-specific expression of a nuclear protein with a primary sequence suggestive of a transcriptional activator function. We report here the characterization of a second functional member of the Xlr gene family that is abundantly transcribed in testis in a tissue-specific and developmentally regulated manner. The protein product of this newly identified gene, called Xmr (Xlr-related, meiosis regulated), is located in the nuclei of spermatocytes, early in the prophase of the first meiotic division, and later becomes concentrated in the XY nuclear subregion where it is in particular associated with the axes of sex chromosomes. The Xmr protein provides a new tool for the investigation of sex chromosome behaviour during meiosis in mammals.
authors.affiliation: INSERM U25, Hôpital Necker, Paris, France.
authors.forename: A
authors.initials: A
authors.lastname: Calenda
authors.forename: B
authors.initials: B
authors.lastname: Allenet
authors.forename: D
authors.initials: D
authors.lastname: Escalier
authors.forename: J F
authors.initials: JF
authors.lastname: Bach
authors.forename: H J
authors.initials: HJ
authors.lastname: Garchon
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D004247:DNA; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D008297:Male; D008540:Meiosis; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D005810:Multigene Family; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D009928:Organ Specificity; D017386:Sequence Homology, Amino Acid; D013090:Spermatocytes / Q000166:cytology / Q000378:metabolism; D013737:Testis / Q000378:metabolism; D014158:Transcription, Genetic; D014960:X Chromosome; D014998:Y Chromosome
chemical_list: D004268:DNA-Binding Proteins; D009687:Nuclear Proteins; C085792:Slx protein, mouse; C490092:Xlr nuclear protein, mouse; D004247:DNA