This T-to-C point mutation at position 5503 of the Kif7 (kinesin family member 7) cDNA was identified in an ENU screen for recessive cardiovascular development phenotypes in Dr. Cecilia Lo's laboratory, NHLBI Cardiovascular Development Consortium (CvDC). It was recovered from G1 sperm and associated with the phenotype described described here. Because G1 sperm were cryopreserved, additional incidental mutations are also segregating in this strain.
Homozygotes demonstrate overriding aorta, double outlet right ventricle (DORV), hypoplastic pulmonary artery (PA), ventricular septal defect (VSD), and atrioventricular septal defect (AVSD). Polydactyly with preaxial or postaxial digit duplication, abnormal lung lobation, abnormal gonad development, cleft lip and palate, micropthalmia/anopthalmia, hydrocephaly, and exencephaly are also seen.