APP blocking peptide

A small fraction of Tidal Disruption Events (TDE) produce relativistic jets, evidenced by their non- thermal X- ray spectra and transient radio emission. Here we present milliarcsecond- resolution imaging results on TDE J1644+5734 with the European VLBI Network (EVN). These provide a strong astrometric constraint on the average apparent jet velocity beta(app) < 0.27, that constrains the intrinsic jet velocity for a given viewing angle.

The assembly of the gamma-secretase complex, an Alzheimer disease-related protease required for beta-amyloid generation, is tightly regulated and predominantly limited by the stoichiometrical availability of its components. We have identified a novel endoplasmic reticulum-located protein complex that is regulated in a similar fashion. It contains the recently identified Nodal signaling antagonists Nicalin ( a distant homolog of the gamma-secretase component Nicastrin) and NOMO ( Nodal modulator). Using an RNA interference approach, we found that Nicalin and NOMO became unstable in the absence of the respective binding partner, suggesting that complex formation has a stabilizing effect. Overexpression of Nicalin resulted in an increase in NOMO, whereas endogenous Nicalin was reduced below the detection limit. Both effects were shown to occur at a post-transcriptional level. Thus, NOMO is most likely produced in excess amounts and either stabilized by Nicalin or rapidly degraded. In contrast, Nicalin levels are limited independently of NOMO. We, therefore, propose that Nicalin controls the assembly and stability of the Nicalin-NOMO complex.