In a GST pull-down assay, the molecular shift of PDE3B S318A was still detected by western blot, indicating that phosphorylation of PDE3B by TBK1 on other sites still occurred, but were not crucial for 14-3-3β 14-3-3β 14-3-3β
We next tested whether the molecular shift of Lck upon iAbs stimulation is indeed induced by phosphorylation of S. To assess this issue, we took advantage of Lck constructs carrying S to D and S to A mutations at this position, which mimic constitutive phosphorylation or prevent phosphorylation, respectively.
Beratan, DN; Onuchic, JN; Hopfield, JJ, Information storage at the molecular level: the design of a molecular shift register memory, Journal of the British Interplanetary Society, vol. 42 (1989), pp. 468-473.
These results demonstrate a molecular shift in the muscle of heart failure patients to a highly fatigable fiber type that may account for classical symptoms such as exercise intolerance.
Finally, in order to investigate the in vivo relevance of the molecular shift displayed in mutated 4RTau cell lines, we performed the same overall approach with a Tau transgenic mice model, which exhibits a quite well defined Tau pathology associated to memory deficits [1].
To determine whether this molecular shift was dependent on phosphorylation of PDE3B, HA-PDE3B was co-expressed in Cos-1 cells along with IKKε, TBK1 or their kinase inactive mutants, and HA immunoprecipitates were treated with or without calf intestinal phosphatase (CIP).
It was an almost molecular shift, an upgrade in how my body fit into the world.
The elution volume of the monomer decreased upon binding FADox and FADred resulting in an apparent molecular mass shift of about 2 4 kDa.
More importantly, we observed that the molecular weight "shift" of mutated 4RTau isovariants is completely abolished after treatment by λ-phosphatase.
After conjugation, no molecular weight shift of the monomer band or obvious polymerization was observed in the product.
IL-17 sequestration also notably led to an isoelectric shift, but not a molecular weight shift, of Kallikrein-1, attributed to phosphorylation.
