Journal
BIOESSAYS
Volume 26, Issue 6, Pages 616-628Publisher
WILEY
DOI: 10.1002/bies.20042
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Funding
- NCI NIH HHS [CA-16056] Funding Source: Medline
- NEI NIH HHS [EY-12104] Funding Source: Medline
- NHLBI NIH HHS [HL-51480, HL-31698] Funding Source: Medline
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In the mouse, at least 16 genes regulate vesicle trafficking to specialized lysosome-related organelles, including platelet dense granules and melanosomes. Fourteen of these genes have been identified by positional cloning. All 16 mouse mutants are models for the genetically heterogeneous human disease, Hermansky-Pudlak Syndrome (HPS). Five HPS genes encode known vesicle trafficking proteins. Nine genes are novel, are found only in higher eukaryotes and encode members of three protein complexes termed BLOCs (Biogenesis of Lyso- some-related Organelles Complexes). Mutations in murine HPS genes, which encode protein co-members of BLOCs, produce essentially identical phenotypes. In addition to their well-known effects on pigmentation, platelet function and lysosome secretion, HPS genes control a wide range of physiological processes including immune recognition, neuronal functions and lung surfactant trafficking. Studies of the molecular functions of HPS proteins will reveal important details of vesicle trafficking and may lead to therapies for HPS. (C) 2004 Wiley Periodicals, Inc.
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