Neuronal mort1 isoforms

C - Chemistry – Metallurgy – 12 – N

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C12N 15/12 (2006.01) C07K 14/47 (2006.01) C07K 14/715 (2006.01)

Patent

CA 2287537

A MORT1 gene initially cloned from HeLa cells and identified as a member of the receptor mediated apoptotic pathway, is expressed in the human neuronal cell line, NTERA2. Isolation of the MORT1 from this cell line revealed a transcript isoform that differed from the known MORT1 sequence by a deletion of 21 base pairs (bp 172-192 of the coding sequence). Cloning of MORT1 from adult human brain revealed two isoforms, one similarly deleted for bp 172-192, the other with a basepair substitution, A for G at position 173. Assessment of MORT1 function in a yeast two hybrid system indicates that the deleted and intact forms of MORT1 differ in their capacity to interact with other members of the apoptotic pathway.

Selon cette invention, un gène MORT1, initialement cloné à partir de cellules de la souche HeLa et identifié comme un élément de la voie apoptotique régulée par des récepteurs, est exprimé dans la lignée de neurones humains NTERA2. En isolant MORT1 de cette lignée cellulaire, on a découvert une isoforme de transcript qui diffère de la séquence connue MORT1 par la suppression de 21 paires de bases (pb 172-192 de la séquence codante). En clonant MORT1 provenant d'un cerveau humain adulte, on a découvert deux isoformes, l'une avec une suppression similaire pour pb 172-192 et l'autre avec une substitution d'une paire de bases, A à la place de G en position 173. L'estimation de la fonction de MORT1 dans un système de levures hybrides de deux souches indique que les formes supprimées et celles intactes de MORT1 ont des capacités différentes en matière d'interaction avec les autres éléments de la voie apoptotique.

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