UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Functional and regulatory properties of p70s6 kinase β

Gout, IT; (1999) Functional and regulatory properties of p70s6 kinase β. Biopolymers and Cell , 15 (5) pp. 415-421. 10.7124/bc.000539.

Full text not available from this repository.

Abstract

© 1999, National Academy of Sciences of Ukraine. All rights reserved. A novel ribosomal S6 kinase, termed p70S6 kinase β, has been recently identified. It is highly homologous to known p70/p85 S6 kinase (p70S6 kinase α) in catalytic, kinase extension and auto-inhibitory domains, but differs significantly in the regulatory N- and C-terminal regions. Here we report the kinetics of serum-induced activation of cytoplasmic isoforms of p70S6 kinase α and β (p70α2 and p70β2) in transiently transfected HEK293. Both kinases exhibit biphasic activation upon serum stimulation, but differ in the appearance of peaks of their S6 specific activity. We also found that p70α2 and p70β2, when overexpressed in HEK293 cells, are sensitive to the immunosuppressant rapamycin. However, p70β2 kinase is more sensitive to low concentrations of rapamycin, when compared with p70α2. At the same time, high concentrations of rapamycin are inhibitory to a higher extent towards p70α2, than p70β2 kinase. Taken together, our results indicate that p70α2 kinase is activated earlier in response to serum and is less sensitive to high concentration of rapamycin, in comparison to p70α2. These differences indicate the existence of alternative signalling mechanisms, involved in the regulation of p70β2 kinase.

Type: Article
Title: Functional and regulatory properties of p70s6 kinase β
DOI: 10.7124/bc.000539
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Structural and Molecular Biology
URI: http://discovery.ucl.ac.uk/id/eprint/1501680
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item