Endoplasmic reticulum-based Nɛ-lysine acetylation serves as an important protein quality control system for the secretory pathway.
While researchers believe there is no single cause for Autism Spectrum Disorder (ASD), two new studies by Luigi Puglielli, MD, PhD, reveal a new potential genetic connection as a cause of the condition.
A new study from the lab of UW-Madison professor of medicine Luigi Puglielli, MD, PhD, opens a door to potential treatments for diseases of age, such as Alzheimer’s disease, by defining the roles of two enzymes that are imperative to protein production.
Nε-lysine acetylation in the ER is an essential component of the quality control machinery. ER acetylation is ensured by a membrane transporter, AT-1/SLC33A1, which translocates cytosolic acetyl-CoA into the ER lumen, and two acetyltransferases, ATase1 and ATase2, which acetylate nascent polypeptides within the ER lumen. Dysfunctional AT-1, as caused by gene mutation or duplication events, results in severe disease phenotypes.
Nε-lysine acetylation of nascent glycoproteins within the endoplasmic reticulum (ER) lumen regulates the efficiency of the secretory pathway. The ER acetylation machinery consists of the membrane transporter, acetyl-CoA transporter 1 (AT-1/SLC33A1), and two acetyltransferases, ATase1/NAT8B and ATase2/NAT8. Dysfunctional ER acetylation is associated with severe neurological diseases with duplication of AT-1/SLC33A1 being associated with autism spectrum disorder, intellectual disability, and dysmorphism.
Mutations and duplication events in AT-1/SLC33A1 are highly pleiotropic and have been linked to diseases such as spastic paraplegia, developmental delay, autism spectrum disorder, intellectual disability, propensity to seizures, and dysmorphism.
In a study published in Aging Cell, researchers at the University of Wisconsin–Madison show that mice making too much of a human protein called AT-1 show signs of early aging and premature death, which are …
The aberrant accumulation of toxic protein aggregates is a key feature of many neurodegenerative diseases, including Huntington’s disease, amyotrophic lateral sclerosis and Alzheimer’s disease. As such, improving normal proteostatic mechanisms is an active target for biomedical research.
Several Waisman Center investigators played key roles in crafting research proposals that were recently selected as ‘cluster hires’ by the University of Wisconsin-Madison. UW–Madison’s Cluster Hiring Initiative was launched in 1998 as an innovative partnership …
Increased expression of AT-1/SLC33A1 causes an autistic-like phenotype in mice by affecting dendritic branching and spine formation Legend: AT-1 Tg animals display changes in neuronal morphology and imbalanced synaptic plasticity. (A-D) Morphological assessment of hippocampal neurons …