Nerve growth factor regulates the expression and activity of p33cdk2 and p34cdc2 kinases in PC12 pheochromocytoma cells - PubMed (original) (raw)

Comparative Study

. 1994 Nov;5(11):1225-41.

doi: 10.1091/mbc.5.11.1225.

Affiliations

Free PMC article

Comparative Study

Nerve growth factor regulates the expression and activity of p33cdk2 and p34cdc2 kinases in PC12 pheochromocytoma cells

K J Buchkovich et al. Mol Biol Cell. 1994 Nov.

Free PMC article

Abstract

In the absence of serum, nerve growth factor (NGF) promotes the survival and differentiation of the PC12 pheochromocytoma cell line. In the presence of serum, NGF acts primarily as a differentiation factor and negative regulator of cell cycling. To investigate NGF control of cell cycling, we have analyzed the regulation of cyclin dependent kinases during PC12 cell differentiation. NGF treatment leads to a reduction in the steady-state protein levels of p33cdk2 and p34cdc2, two key regulators of cell cycle progression. The decrease in p33cdk2 and p34cdc2 coincides with a decrease in the enzymatic activity of cyclinA-p34cdc2, cyclinB-p34cdc2, cyclinE-p33cdk2, and cyclinA-p33cdk2 kinases. The decline in p33cdk2 and p34cdc2 kinase activity in response to NGF is accelerated in cells that over-express the p140trk NGF receptor, suggesting that the timing of the down- regulation is dependent on the level of p140trk and the strength of the NGF signal. The level of cyclin A, a regulatory subunit of p33cdk2 and p34cdc2, is relatively constant during PC12 differentiation. Nevertheless, the DNA binding activity of the cyclinA-associated transcription factor E2F/DP decreases. Thus, NGF down-regulates the activity of cyclin dependent kinases and cyclin-transcription factor complexes during PC12 differentiation.

PubMed Disclaimer

Similar articles

Cited by

References

    1. Neuron. 1993 Jun;10(6):1197-209 - PubMed
    1. Trends Biochem Sci. 1993 May;18(5):157-9 - PubMed
    1. J Neurosci. 1993 Jul;13(7):2930-8 - PubMed
    1. Oncogene. 1993 Aug;8(8):2033-42 - PubMed
    1. EMBO J. 1993 Aug;12(8):3111-21 - PubMed

Publication types

MeSH terms

Substances

LinkOut - more resources