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A 94 kb genomic sequence 3' to the murine Xist gene reveals an AT rich region containing a new testis specific gene Tsx.

par Simmler, M C;Cunningham, D B;Clerc, P;Vermat, T;Caudron, B;Cruaud, C;Pawlak, A;Szpirer, Claude ;Weissenbach, Jean;Claverie, J M;Avner, P
Référence Human molecular genetics, 5, 11, page (1713-1726)
Publication Publié, 1996

Article révisé par les pairs

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Résumé :

X chromosome inactivation in both mouse and human requires the presence of a cis acting locus, the X inactivation centre. This locus is thought to be involved in the initiation and spreading of the inactivation signal in early development. In order to increase our understanding of the mouse X inactivation centre, a 94 kb region immediately distal to the Xist gene has been sequenced and analysed for the presence of transcription units and/or potential cis acting regulatory elements. We have identified a novel gene, Tsx, lying 40 kb 3' from Xist. Tsx is expressed specifically in the testis and shows no convincing homology to proteins currently in the databases. A rat homologue, also X linked, has been isolated. The mouse and rat Tsx sequences are highly divergent, suggesting that part of the X inactivation centre, including both Xist and Tsx are subject to relatively weak evolutionary constraints.