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Mol Cell Biol. 1991 October; 11(10): 4943-4951

Induction of NF-kappa B DNA-binding activity during the G0-to-G1 transition in mouse fibroblasts.

A S Baldwin Jr, J C Azizkhan, D E Jensen, A A Beg and L R Coodly

Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill 27599-7295.

ABSTRACT

A DNA-binding factor with properties of NF-kappa B and another similar activity are rapidly induced when growth-arrested BALB/c 3T3 cells are stimulated with serum growth factors. Induction of these DNA-binding activities is not inhibited by pretreatment of quiescent cells with the protein synthesis inhibitor cycloheximide. Interestingly, the major NF-kappa B-like activity is not detected in nuclear extracts of proliferating cells, and thus its expression appears to be limited to the G0-to-G1 transition in 3T3 cells. These DNA-binding activities bind many of the expected NF-kappa B target sequences, including elements in the class I major histocompatibility complex and human immunodeficiency virus enhancers, as well as a recently identified NF-kappa B binding site upstream of the c-myc gene. Furthermore, both the class I major histocompatibility complex and c-myc NF-kappa B binding sites confer inducibility on a minimal promoter in 3T3 cells stimulated with serum growth factors. The results demonstrate that NF-kappa B-like activities are immediate-early response proteins in 3T3 cells and suggest a role for these factors in the G0-to-G1 transition.


Mol Cell Biol. 1991 October; 11(10): 4943-4951




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