The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

A serine residue in the N-terminal acidic region of rat RPB6, one of the common subunits of RNA polymerases, is exclusively phosphorylated by casein kinase II in vitro.

RPB6 is one of the common subunits of all eukaryotic RNA polymerases and is indispensable for the enzyme function. Here, we isolated a rat cDNA encoding RPB6. It contained 127 amino acid (a.a.) residues. From alignment of RPB6 homologues of various eukaryotes, we defined two conserved regions, i.e. an N-terminal acidic region and a C-terminal core. In this study, we investigated in vitro phosphorylation of rat RPB6 by casein kinase II (CKII), a pleiotropic regulator of numerous cellular proteins. Three putative CKII-phosphorylated a.a. within rat RPB6 were assigned. We found that serines were phosphorylated by CKII in vitro. Mutagenesis studies provided evidence that a serine at a.a. position 2 was exclusively phosphorylated. Finally, an RPB6-engaged in-gel kinase assay clarified that CKII was a prominent protein kinase in rat liver nuclear extract that phosphorylates RPB6. Therefore, RPB6 was implied to be phosphorylated by CKII in the nucleus. We postulate that the N-terminal acidic region of the RPB6 subunit has some phosphorylation-coupled regulatory functions.[1]

References

 
WikiGenes - Universities