Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.


An autosomal recessive neurodegenerative disorder clinically characterized by refractory seizures apparent in the first year of life, mild early developmental delay, and developmental regression after seizure onset. Other features include hypotonia, hyperreflexia, peripheral spasticity, poor eye contact, absent speech, poor head control, and inability to walk. Brain imaging shows reduced white matter volume with delayed myelination, and punctate calcifications.






Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.

UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again