Our results indicate that DCAF8 p.R317C mutation is responsible for this specific variety of HMSN2 with infrequent giant axons and mild cardiomyopathy. This mutation results in decreased DDB1-DCAF8 association, leading to an E3 ubiquitin ligase defect that is likely associated with neurofilament degradation.
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Klein et al. (2014) studied this question.
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