A mutation in the Pax-6 gene in rat small eye is associated with impaired migration of midbrain crest cells

1 April 1993

journal article
research article
Published by Springer Nature in Nature Genetics

Vol. 3 (4) , 299-304
https://doi.org/10.1038/ng0493-299

Abstract

The rat small eye strain (rSey) lacks eyes and nose in the homozygote, and is similar to the mouse Sey strain with mutations in the Pax-6 gene. We isolated Pax-6 cDNA clones from an rSey homozygote library, and found an internal deletion of about 600 basepairs in the serine/threonine-rich domain. At the genomic level, a single base (G) insertion in an exon generates an abnormal 5′ donor splice site, thereby producing the truncated mRNA. Anterior midbrain crest cells in the homozygous rSey embryos reached the eye rudiments but did not migrate any further to the nasal rudiments, suggesting that the Pax-6 gene is involved in conducting migration of neural crest cells from the anterior midbrain.

Keywords

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