Structural and functional impairment of endocytic pathways by retinitis pigmentosa mutant rhodopsin-arrestin complexes. Academic Article uri icon

Overview

abstract

  • Retinitis pigmentosa (RP) is a clinically and genetically heterogeneous degenerative eye disease. Mutations at Arg135 of rhodopsin are associated with a severe form of autosomal dominant RP. This report presents evidence that Arg135 mutant rhodopsins (e.g., R135L, R135G, and R135W) are hyperphosphorylated and bind with high affinity to visual arrestin. Mutant rhodopsin recruits the cytosolic arrestin to the plasma membrane, and the rhodopsin-arrestin complex is internalized into the endocytic pathway. Furthermore, the rhodopsin-arrestin complexes alter the morphology of endosomal compartments and severely damage receptor-mediated endocytic functions. The biochemical and cellular defects of Arg135 mutant rhodopsins are distinct from those previously described for class I and class II RP mutations, and, hence, we propose that they be named class III. Impaired endocytic activity may underlie the pathogenesis of RP caused by class III rhodopsin mutations.

publication date

  • July 1, 2004

Research

keywords

  • Arrestin
  • Endocytosis
  • Mutation, Missense
  • Retinitis Pigmentosa
  • Rhodopsin

Identity

PubMed Central ID

  • PMC437971

Scopus Document Identifier

  • 3242778617

Digital Object Identifier (DOI)

  • 10.1172/JCI21136

PubMed ID

  • 15232620

Additional Document Info

volume

  • 114

issue

  • 1