PUBLICATION
Mutations in the KIF21B kinesin gene cause neurodevelopmental disorders through imbalanced canonical motor activity
- Authors
- Asselin, L., Rivera Alvarez, J., Heide, S., Bonnet, C.S., Tilly, P., Vitet, H., Weber, C., Bacino, C.A., Baranaño, K., Chassevent, A., Dameron, A., Faivre, L., Hanchard, N.A., Mahida, S., McWalter, K., Mignot, C., Nava, C., Rastetter, A., Streff, H., Thauvin-Robinet, C., Weiss, M.M., Zapata, G., Zwijnenburg, P.J.G., Saudou, F., Depienne, C., Golzio, C., Héron, D., Godin, J.D.
- ID
- ZDB-PUB-200813-1
- Date
- 2020
- Source
- Nature communications 11: 2441 (Journal)
- Registered Authors
- Keywords
- none
- MeSH Terms
-
- Organ Size
- Humans
- Pedigree
- Organogenesis/genetics
- Axons/metabolism
- Male
- Mutation/genetics*
- Neurons/metabolism
- HEK293 Cells
- Animals
- Zebrafish/anatomy & histology
- Zebrafish/genetics
- Gene Expression Regulation, Developmental
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Mutation, Missense/genetics
- Cell Movement
- Cerebral Cortex/embryology
- Cerebral Cortex/pathology
- Cerebral Cortex/physiopathology
- Female
- Cell Proliferation
- Motor Activity*
- Nerve Net/pathology
- Nerve Net/physiopathology
- Neurodevelopmental Disorders/genetics*
- Neurodevelopmental Disorders/physiopathology*
- Mice
- Kinesins/genetics*
- PubMed
- 32415109 Full text @ Nat. Commun.
Citation
Asselin, L., Rivera Alvarez, J., Heide, S., Bonnet, C.S., Tilly, P., Vitet, H., Weber, C., Bacino, C.A., Baranaño, K., Chassevent, A., Dameron, A., Faivre, L., Hanchard, N.A., Mahida, S., McWalter, K., Mignot, C., Nava, C., Rastetter, A., Streff, H., Thauvin-Robinet, C., Weiss, M.M., Zapata, G., Zwijnenburg, P.J.G., Saudou, F., Depienne, C., Golzio, C., Héron, D., Godin, J.D. (2020) Mutations in the KIF21B kinesin gene cause neurodevelopmental disorders through imbalanced canonical motor activity. Nature communications. 11:2441.
Abstract
KIF21B is a kinesin protein that promotes intracellular transport and controls microtubule dynamics. We report three missense variants and one duplication in KIF21B in individuals with neurodevelopmental disorders associated with brain malformations, including corpus callosum agenesis (ACC) and microcephaly. We demonstrate, in vivo, that the expression of KIF21B missense variants specifically recapitulates patients' neurodevelopmental abnormalities, including microcephaly and reduced intra- and inter-hemispheric connectivity. We establish that missense KIF21B variants impede neuronal migration through attenuation of kinesin autoinhibition leading to aberrant KIF21B motility activity. We also show that the ACC-related KIF21B variant independently perturbs axonal growth and ipsilateral axon branching through two distinct mechanisms, both leading to deregulation of canonical kinesin motor activity. The duplication introduces a premature termination codon leading to nonsense-mediated mRNA decay. Although we demonstrate that Kif21b haploinsufficiency leads to an impaired neuronal positioning, the duplication variant might not be pathogenic. Altogether, our data indicate that impaired KIF21B autoregulation and function play a critical role in the pathogenicity of human neurodevelopmental disorder.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping