Skeletal Dysplasia_Fetal

Gene: KIF5B

Green List (high evidence)

Following review from fetal anomalies panel:

4 individuals with Kyphomelic dysplasia (severe bowing of the limbs, sharp angulation of the femora and humeri, short stature, narrow thorax, distinctive facial features, and neonatal respiratory distress. WES found de novo heterozygous missense variants in KIF5B encoding kinesin-1 heavy chain. All variants involved conserved amino acids in or close to the ATPase activity-related motifs in the catalytic motor domain of the KIF5B protein. No functional studies of variants.

Previously 2 animal model experiments showed that loss of function of KIF5B can cause kyphomelic dysplasia. First, chondrocyte-specific knockout of Kif5b in mice was shown to produce a disorganized growth plate, leading to bone deformity. Second, double mutants disrupting the two zebrafish kif5b caused abnormal skeletal morphogenesis and the curvature of Meckel's and ceratohyal cartilages.
Sources: Literature

Created: 9 Nov 2022, 1 a.m.

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Phenotypes
Skeletal dysplasia, MONDO:0018230; KIF5B-related; Kyphomelic dysplasia

Publications

• 35342932