e. the MAPK, the PI3-K and the PLC gamma ones, are differentially involved. While it has been shown that FGF-2 can elicit long lasting elevations in intracellular calcium concentration, [Ca2+](i), the role of the three pathways in this process has not been elucidated. Here we show, by means of pharmacological inhibitors, that all three are involved,

at a different extent, in the generation learn more of the [Ca2+](i); increase induced by FGF-2; in particular, inhibition of the PLC gamma pathway, in addition to reducing the number of responsive cells, induces, in a significant population of cells, basal calcium oscillations in the absence of the growth factor and interferes with calcium signals elicited by depolarization. We propose that this complex behaviour can be due to a perturbation in PIP2 levels at the plasmamembrane. (C) 2012 Elsevier Ireland Ltd. All rights reserved.”
“Replication

and transcription activator (RTA), an immediate-early gene, is a key molecular switch to evoke lytic replication of gammaherpesviruses. Open reading frame 49 (ORF49) is conserved among gammaherpesviruses and shown to cooperate with RTA in regulating virus lytic replication. Here we show a molecular mechanism and see more in vivo functions of murine gammaherpesvirus 68 (MHV-68 or gamma HV-68) ORF49. MHV-68 ORF49 was transcribed and translated as a late gene. The ORF49 protein was associated with a virion, interacting with the ORF64 large tegument protein and the ORF25 capsid protein. Moreover, ORF49 directly bound to RTA and its negative cellular regulator, poly(ADP-ribose) polymerase-1 (PARP-1), and disrupted the interactions of RTA and PARP-1. Productive replication of an ORF49-deficient mutant virus (49S) was attenuated in vivo as well as in vitro. Likewise, latent infection was also impaired in the spleen of 49S-infected mice. Taken together, our results suggest that the virion-associated

ORF49 protein may promote virus replication both in vitro and in vivo by providing an optimal environment in the early phase of virus infection as a derepressor of RTA.”
“This report describes the first purification procedure of the human full-length N Oct-3 protein in amounts suitable for structural studies and proteomic R406 ic50 investigations. N Oct-3 is a transcription factor member of the POU protein family. It possesses a large N-terminal transactivation domain and a DNA-binding domain (DBD) which is composed of two subdomains, PCUs and POUh, which are joined by a linker peptide. N Oct-3 is a master gene for central nervous system development but also for melanoma progression. Previous structural studies have all been performed using N Oct-3 DBD only. In this study, the full-length N Oct-3 protein was bacterially expressed and purified to homogeneity.