AIPL1, a protein associated with childhood blindness, interacts with alpha-subunit of rod phosphodiesterase (PDE6) and is essential for its proper assembly.

ABSTRACT: Mutations in the gene coding for AIPL1 cause Leber congenital amaurosis (LCA), a severe form of childhood blindness. The severity in disease is reflected in the complete loss of vision and rapid photoreceptor degeneration in the retinas of mice deficient in AIPL1. Our previous observations suggest that rod photoreceptor degeneration in retinas lacking AIPL1 is due to the massive reduction in levels of rod cGMP phosphodiesterase (PDE6) subunits (alpha, beta, and gamma). To date, the crucial link between AIPL1 and the stability of PDE6 subunits is not known. In this study using ex vivo pulse label analysis, we demonstrate that AIPL1 is not involved in the synthesis of PDE6 subunits. However, ex vivo pulse-chase analysis clearly shows that in the absence of AIPL1, rod PDE6 subunits are rapidl

SUBMITTER: Kolandaivelu S 

PROVIDER: S-EPMC2781484 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature