The SOS2/CIPK24 protein kinase has been found to involve the regulation of class I NHX-mediated tonoplast Na+/H+ exchange in Arabidopsis (Qiu et al. [2004]).
Expression of RIαB in B cells disrupts the PKA dependent regulation of class switch recombination [34].
Up regulation of class II (IAb) molecules was observed in CD11c+ DCs from B6 and Tg650 mice after maturation with LPS and was further amplified following transduction with AdTA or AdhPrP (Fig. 4a).
Vassinova et al [9] initially described a putative Fur box within the E. coli nrdHIEF promoter region but so far there is no experimental evidence regarding a Fur-mediated regulation of class Ib nrd genes.
Furthermore, we have shown Fur binding to both this sequence and to its own promoter, indicating a direct role of the Fur protein in the regulation of class Ib nrd genes as well as in the autoregulation of fur expression similarly to what has previously been described in E. coli [23].
Drap1 (NC2alpha) is involved in the transcriptional regulation of class II genes [ 65].
We next evaluated whether and how NM1 may be involved in transcription regulation of class II promoters.
In Arabidopsis and Medicago truncatula, miR166-mediated regulation of Class III HD-ZIP genes is important for root development [ 32- 34].
Although the nature of the inducing signal, if any, for Class II systems remains unknown, the genes and regulation of Class I transfer systems are well-studied.
By RT-PCR, we also detected upregulation of β-tubulin class I and down regulation of class IVa in STMN-/ MEFs compared to wild-type cells.
