Molecular and functional profiling distinguishes PACS1 syndrome variant from PACS1 loss-of-function in iNeurons
PACS1 syndrome is a rare neurodevelopmental disorder caused by a recurrent de novo missense variant (p.R203W) in the PACS1 protein. However, it remains unclear whether the p.R203W variant acts through a loss-of-function or alternative mechanism. Here, we used isogenic iPSC-derived neurons (iNs) to directly compare the effects of PACS1 p.R203W to complete loss of PACS1 function. Using a…
PACS1 syndrome is a rare neurodevelopmental disorder caused by a specific genetic mutation in the PACS1 protein. Scientists have discovered that this mutation, known as p.R203W, does not merely result in the loss of function like many other genetic disorders. Instead, they used a special type of cell grown from stem cells (iNeurons) to compare the effects of this mutation to complete loss of the PACS1 protein.
By examining these specialized cells using various scientific techniques, researchers found that the p.R203W mutation leads to distinct molecular and functional traits compared to a complete absence of PACS1. The cells with the mutation displayed unique protein structures and signaling patterns, along with altered excitability under certain conditions.
These findings suggest that PACS1 syndrome is not simply caused by the loss of a protein, but rather by a more complex mechanism involving the specific mutation. Additionally, the study indicates that the mutation maintains some original functions of PACS1 while introducing new interactions that may be linked to the syndrome's development.
This research offers a foundation for future studies to better understand the disease's underlying mechanisms and potentially develop new treatments.
Written by urgent.news from bioRxiv's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
