David Brenner, Kirsten Sieverding, Jahnavi Srinidhi, Susanne Zellner, Christopher Secker, Rüstem Yilmaz, Julia Dyckow, Shady Amr, Anna Ponomarenko, Esra Tunaboylu, Yasmin Douahem, Joana S Schlag, Lucía Rodríguez Martínez, Georg Kislinger, Cornelia Niemann, Karsten Nalbach, Wolfgang P Ruf, Jonathan Uhl, Johanna Hollenbeck, Lucas Schirmer, Alberto Catanese, Christian S Lobsiger, Karin M Danzer, Deniz Yilmazer-Hanke, Christian Münch, Philipp Koch, Axel Freischmidt, Martina Fetting, Christian Behrends, Rosanna Parlato, Jochen H Weishaupt
Heterozygous mutations in the TBK1 gene can cause amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). The majority of TBK1-ALS/FTD patients carry deleterious loss-of-expression mutations, and it is still unclear which TBK1 function leads to neurodegeneration. We investigated the impact of the pathogenic TBK1 missense variant p.E696K, which does not abolish protein expression, but leads to a selective loss of TBK1 binding to the autophagy adaptor protein and TBK1 substrate optineurin. Using organelle-specific proteomics, we found that in a knock-in mouse model and human iPSC-derived motor neurons, the p...
May 6, 2024: Journal of Experimental Medicine