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N-Oct 5 is generated by in vitro proteolysis of the neural POU-domain protein N-Oct 3

Atanasoski, S. and Schreiber, E. and Fontana, A. and Herr, W.. (1997) N-Oct 5 is generated by in vitro proteolysis of the neural POU-domain protein N-Oct 3. Oncogene, 14 (11). pp. 1287-1294.

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Official URL: http://edoc.unibas.ch/49929/

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Abstract

The neural POU-domain proteins N-Oct 3 and N-Oct 5 were first identified in electrophoretic mobility retardation assays through their ability to bind to the octamer sequence ATGCAAAT. These two N-Oct factors are detected in extracts from tumor-derived and normal neural cells. They are present differentially, however, in extracts from melanocytes and melanoma cells: N-Oct 3 is present in extracts from both melanocytes and melanoma cells, whereas N-Oct 5 is more evident in extracts from metastatic melanoma cells. We show here that a cDNA encoding N-Oct 3 directs synthesis of both the N-Oct 3 and N-Oct 5 proteins and that the N-Oct 5 protein in neural and melanoma-cell extracts is also related to N-Oct 3. N-Oct 5, however, is apparently not expressed in vivo: It is not detected if cells are rapidly lysed in SDS or if extracts are prepared with a cocktail of protease inhibitors that includes the serine-protease inhibitor 4-(2-Aminoethyl)benzenesulfonyl fluoride hydrochloride (AEBSF). These data suggest that N-Oct 5 is a specific in vitro proteolytic cleavage product of N-Oct 3 and is not directly related to melanocyte malignancy.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Former Units at DBM > Cellular Neurobiology (Atanasoski)
UniBasel Contributors:Atanasoski, Suzana
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
ISSN:0950-9232
e-ISSN:1476-5594
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:04 Oct 2017 09:12
Deposited On:04 Oct 2017 09:12

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