Identification of proteins in the ceroid-like autofluorescent aggregates from liver lysosomes of Beige, a mouse model for human Chediak–Higashi syndrome
Copyright policy )Identification of proteins in the ceroid-like autofluorescent aggregates from liver lysosomes of Beige, a mouse model for human Chediak–Higashi syndrome
Chediak-Higashi syndrome is characterized by oculocutaneous albinism, a bleeding tendency and severe recurrent infections. Age-dependent formations of autofluorescent ceroid-like substances have been noted in a variety of tissues. In this study, we isolated an autofluorescent ceroid-like aggregate from purified Beige mouse liver lysosomes and analyzed the composition of the aggregate by ion trap mass-spectrometry. In addition to lysosomal proteins, this aggregate contains proteins normally localized in the ER, mitochondria, peroxisomes, and the cytosol. Bip, a luminal ER protein was abundant in lysosomal ceroid. The ER, mitochondria, and cytosol proteins could arise in lysosomes through stimulation of autophagy, but we found no differences between normal and CHS fibroblasts in the degree of lysosomal acidity and in the level of conversion of soluble microtubular-associated protein 1 light chain 3 type I to membrane-associated type II, an accepted probe for hyper-autophagy suggesting that ceroid formation is unlikely to arise via this mechanism.
- Hospital for Sick Children Canada
- University of Toronto Canada
Proteomics, Proteins, Fluorescence, Mass Spectrometry, Disease Models, Animal, Mice, Ceroid, Liver, Autophagy, Animals, Chediak-Higashi Syndrome, Lysosomes, Cells, Cultured
Proteomics, Proteins, Fluorescence, Mass Spectrometry, Disease Models, Animal, Mice, Ceroid, Liver, Autophagy, Animals, Chediak-Higashi Syndrome, Lysosomes, Cells, Cultured
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).3 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!