KIF1A mutation in a patient with progressive neurodegeneration

Nobuhiko Okamoto, Fuyuki Miya, Tatsuhiko Tsunoda, Keiko Yanagihara, Mitsuhiro Kato, Shinji Saitoh, Mami Yamasaki, Yonehiro Kanemura, Kenjiro Kosaki

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


Kinesins are a large superfamily of molecular motors. They move along microtubule filaments and are powered by the hydrolysis of ATP. This transport system is essential for neuronal function and survival. KIF1A belongs to the kinesin 3 family and involves in the anterograde transport of synaptic vesicle precursors along axons. Several studies confirmed that KIF1A mutations cause spastic paraplegia and sensory neuropathy in an autosomal-recessive fashion. A missense mutation in the KIF1A gene (p.Thr99Met) has been reported in a patient with intellectual disability (ID), axial hypotonia and peripheral spasticity. Mild atrophy of the cerebellar vermis was found on magnetic resonance imaging. The mutation was heterozygous and de novo. We identified the second patient with the p.T99M mutation in the KIF1A gene by whole-exome sequencing. He showed severe ID, spasticity, optic atrophy, neurogenic bladder, growth failure and progressive cerebellar atrophy. The p.T99M mutation may be a common recurrent mutation. We suppose that this specific mutation of KIF1A shows a novel neurodegenerative syndrome.

Original languageEnglish
Pages (from-to)639-641
Number of pages3
JournalJournal of Human Genetics
Issue number11
Publication statusPublished - 2014 Nov 11

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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