Phosphorylated TP63 Induces Transcription of RPN13, Leading to NOS2 Protein Degradation*

Leading to Apoptosis Hyperpolarization and Synaptic Stress Protein Induces Mitochondrial HIV-1 Transactivator of Transcription

Cytomegalovirus infection induces high levels of cyclins, phosphorylated Rb, and p53, leading to cell cycle arrest.

Human cytomegalovirus (HCMV) infection stimulates cellular DNA synthesis and causes chromosomal damage. Because such events likely affect cellular proliferation, we investigated the impact of HCMV infection on key components of the cell cycle. Early after infection, HCMV induced elevated levels of cyclin E, cyclin E-associated kinase activity, and two tumor suppressor proteins, p53 and the reti...

Expression of Epstein-Barr virus BZLF1 immediate-early protein induces p53 degradation independent of MDM2, leading to repression of p53-mediated transcription.

The Epstein-Barr virus (EBV) lytic program elicits ATM-dependent DNA damage response, resulting in phosphorylation of p53 at N-terminus, which prevents interaction with MDM2. Nevertheless, p53-downstream signaling is blocked. We found here that during the lytic infection p53 was actively degraded in a proteasome-dependent manner even with a reduced level of MDM2. BZLF1 protein enhanced the ubiq...

Glycation of Human IgG Induces Structural Alterations Leading to Changes in its Interaction with Anti-IgG

Background: Glycation of proteins is a non-enzymatic spontaneous process that occurs in diabetes mellitus and aging, altering the structure and function of proteins. IgG undergoes glycation leading to changes in its reactivity to antigen and fixation of complement.   Objective: This study aimed at revealing the effect of glycation on the interaction of IgG with anti-IgG using electroimmunoassay...

Binding of SGTA to Rpn13 selectively modulates protein quality control

Rpn13 is an intrinsic ubiquitin receptor of the 26S proteasome regulatory subunit that facilitates substrate capture prior to degradation. Here we show that the C-terminal region of Rpn13 binds to the tetratricopeptide repeat (TPR) domain of SGTA, a cytosolic factor implicated in the quality control of mislocalised membrane proteins (MLPs). The overexpression of SGTA results in a substantial in...