A novel Rab27a mutation binds melanophilin, but not Munc13-4, causing immunodeficiency without albinism
نویسندگان
چکیده
منابع مشابه
Patients with Griscelli syndrome and normal pigmentation identify RAB27A mutations that selectively disrupt MUNC13-4 binding
BACKGROUND Familial hemophagocytic lymphohistiocytosis (FHL) is a rare and often fatal disorder characterized by defective cellular cytotoxicity and hyperinflammation, and the only cure known to date is hematopoietic stem cell transplantation. Mutations in RAB27A, LYST, and AP3B1 give rise to FHL associated with oculocutaneous albinism, and patients with FHL are usually only screened for mutati...
متن کاملDistinct Rab27A binding affinities of Slp2-a and Slac2-a/melanophilin: Hierarchy of Rab27A effectors.
The small GTPase Rab27A has recently been shown to regulate melanosome transport in mammalian skin melanocytes through sequentially interacting with two Rab27A effectors, Slac2-a/melanophilin and Slp2-a. Although Slac2-a and Slp2-a contain a similar N-terminal Rab27A-binding domain (named SHD, Slp homology domain), nothing is known about the functional differences between the Slac2-a SHD and Sl...
متن کاملIncreased survival and reduced neutrophil infiltration of the liver in Rab27a- but not Munc13-4-deficient mice in lipopolysaccharide-induced systemic inflammation.
Genetic defects in the Rab27a or Munc13-4 gene lead to immunodeficiencies in humans, characterized by frequent viral and bacterial infections. However, the role of Rab27a and Munc13-4 in the regulation of systemic inflammation initiated by Gram-negative bacterium-derived pathogenic molecules is currently unknown. Using a model of lipopolysaccharide-induced systemic inflammation, we show that Ra...
متن کاملWhole Exome Sequencing Reveals a XPNPEP3 Novel Mutation Causing Nephronophthisis in a Pediatric Patient
Background: Nephronophthisis (NPHP) is a progressive tubulointestinal kidney condition that demonstrates an AR inheritance pattern. Up to now, more than 20 various genes have been detected for NPHP, with NPHP1 as the first one detected. X-prolyl aminopeptidase 3 (XPNPEP3) mutation is related to NPHP-like 1 nephropathy and late onset NPHP. Methods: The proband (index patient) had polyuria, polyd...
متن کاملMunc13-4 is an effector of rab27a and controls secretion of lysosomes in hematopoietic cells.
Griscelli syndrome type 2 (GS2) is a genetic disorder in which patients exhibit life-threatening defects of cytotoxic T lymphocytes (CTLs) whose lytic granules fail to dock on the plasma membrane and therefore do not release their contents. The disease is caused by the absence of functional rab27a, but how rab27a controls secretion of lytic granule contents remains elusive. Mutations in Munc13-...
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ژورنال
عنوان ژورنال: Journal of Allergy and Clinical Immunology
سال: 2016
ISSN: 0091-6749
DOI: 10.1016/j.jaci.2015.12.1337