Polypeptides having a .beta.-adremergic receptor activity in...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/12 (2006.01) C07H 21/00 (2006.01) C07K 14/705 (2006.01) C07K 16/28 (2006.01) C12N 15/63 (2006.01) C12Q 1/68 (2006.01) G01N 33/566 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2045658

Novel polypeptides having a beta -adrenergic receptor activity containing the sequence of 402 amino acids, or a fragment of this sequence, said fragment being such that, in particular, either it nonetheless includes the sites contained in said sequence and whose presence is necessary so that, when the fragment is exposed to the surface of a cell, it is capable of participating in the activation of the cyclase adenylate in the presence of an agonist, or it is likely to be recognized by antibodies which also recognize the above succession of 402 amino acids, but fail to recognize the beta 1 adrenergic receptor and the beta 2 adrenergic receptor. These polypeptides are useful for screening drugs which act on said polypeptides and for treating obesity, fat diabetes and hyperlipidemias.

L'invention a pour objet de nouveaux polypeptides ayant une activité de récepteur .beta.-adrénergique .alpha. ~ant: la séquence de 402 acides aminés, ou un fragment de cette séquence, ce fragment étant tel que notamment soit il contient néan-moins les sites contenus dans cette séquence et dont la présence est nécessaire pour que, lorsque ce fragment est exposé à la surface d'une cellule, il soit capable de participer à l'activation de l'adénylate cyclase en présence d'un agoniste, soit il est susceptible d'étre reconnu par des anticorps qui reconnaissent également la susdite séquence de 402 acides aminés, mais ne reconnaissent ni le récepteur adrénergique .beta.1, ni le récepteur adrénergique .beta.2. Ces polypeptides sont utiles pour le criblage de médicaments, actifs sur lesdits polypeptides et destinés au traitement de l'obésité, du diabète gras, ainsi que des hyperlipidémies.

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