title: Cell biology and function of neuronal ceroid lipofuscinosis-related proteins.
abstract: Neuronal ceroid lipofuscinoses (NCL) comprise a group of inherited lysosomal disorders with variable age of onset, characterized by lysosomal accumulation of autofluorescent ceroid lipopigments, neuroinflammation, photoreceptor- and neurodegeneration. Most of the NCL-related genes encode soluble and transmembrane proteins which localize to the endoplasmic reticulum or to the endosomal/lysosomal compartment and directly or indirectly regulate lysosomal function. Recently, exome sequencing led to the identification of four novel gene defects in NCL patients and a new NCL nomenclature currently comprising CLN1 through CLN14. Although the precise function of most of the NCL proteins remains elusive, comprehensive analyses of model organisms, particularly mouse models, provided new insight into pathogenic mechanisms of NCL diseases and roles of mutant NCL proteins in cellular/subcellular protein and lipid homeostasis, as well as their adaptive/compensatorial regulation at the transcriptional level. This review summarizes the current knowledge on the expression, function and regulation of NCL proteins and their impact on lysosomal integrity. This article is part of a Special Issue entitled: The Neuronal Ceroid Lipofuscinoses or Batten Disease.
authors: Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
authors: Katrin
authors: K
authors: Kollmann
authors: Kristiina
authors: K
authors: Uusi-Rauva
authors: Enzo
authors: E
authors: Scifo
authors: Jaana
authors: J
authors: Tyynelä
authors: Anu
authors: A
authors: Jalanko
authors: Thomas
authors: T
authors: Braulke
mesh_terms: D000818:Animals; D006801:Humans; D008565:Membrane Proteins / Q000378:metabolism*; D051379:Mice; D009472:Neuronal Ceroid-Lipofuscinoses / Q000378:metabolism* / Q000473:pathology*; D013869:Thiolester Hydrolases / Q000378:metabolism*
chemical_list: D008565:Membrane Proteins; D013869:Thiolester Hydrolases; C416054:PPT1 protein, human; C095299:palmitoyl-protein thioesterase
keywords: CSPα; Lysosomal storage disorder; Lysosome; Mannose 6-phosphate; Neurodegeneration; Progranulin