Cell Growth & Differentiation, Vol 2, Issue 10 519-524, Copyright © 1991 by American Association of Cancer Research

ARTICLES

A melanoma octamer binding protein is responsive to differentiating agents

RA Sturm, F Bisshop, H Takahashi and PG Parsons
Centre for Molecular Biology and Biotechnology, University of Queensland, Australia.

Analysis of human melanocytes and melanoma cell lines for proteins interacting with the octamer control sequence (ATGCAAAT) has revealed two distinct melanoma octamer binding proteins, Oct-M1 and Oct-M2. The latter was restricted to cell lines derived from tumor metastases. The level of Oct-M1 activity in a pigmented melanoma line was enhanced in comparison to the general octamer binding protein Oct-1 when cells were cultured in the presence of the depigmenting agent dithiothreitol and conversely was reduced by the differentiating and pigment inducing agents butyric acid and dimethyl sulfoxide.

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