Title : Ha-ras p21-GTP levels remain constant during primary keratinocyte differentiation.

Pub. Date : 1995 Feb

PMID : 7662118






4 Functional Relationships(s)
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1 Ha-ras p21-GTP levels remain constant during primary keratinocyte differentiation. Guanosine Triphosphate cyclin-dependent kinase inhibitor 1A (P21) Mus musculus
2 In the present studies, we measured the level and activity state of Ha-ras p21 protein in cultured keratinocytes undergoing calcium-induced differentiation. Calcium cyclin-dependent kinase inhibitor 1A (P21) Mus musculus
3 The percentage of Ha-ras p21 protein in its active, GTP-bound form also remained unchanged during primary adult keratinocyte differentiation and in immortalized, benign, and malignant keratinocytes subjected to differentiating conditions. Guanosine Triphosphate cyclin-dependent kinase inhibitor 1A (P21) Mus musculus
4 Our results indicate that terminal differentiation of primary adult mouse keratinocytes occurred in the presence of constant levels of Ha-ras p21-GTP, suggesting that the Ha-ras signaling pathway may be blocked at a point distal to a step involving the Ha-ras p21 protein itself. Guanosine Triphosphate cyclin-dependent kinase inhibitor 1A (P21) Mus musculus