ADAM19 (A Disintegrin And Metalloproteinase domain 19) is a member of the ADAM family of transmembrane metalloproteinases with important functions in development, neuroprotection, and cellular signaling. Located on chromosome 5q33.1, ADAM19 is predominantly expressed in the heart, skeletal muscle, and nervous system, including brain regions critical for learning and memory.
Gene Information
Molecular Function
ADAM19 possesses catalytic metalloproteinase activity and mediates ectodomain shedding of various substrates:
ADAM19 (A Disintegrin And Metalloproteinase domain 19) is a member of the ADAM family of transmembrane metalloproteinases with important functions in development, neuroprotection, and cellular signaling. Located on chromosome 5q33.1, ADAM19 is predominantly expressed in the heart, skeletal muscle, and nervous system, including brain regions critical for learning and memory.
Gene Information
Molecular Function
ADAM19 possesses catalytic metalloproteinase activity and mediates ectodomain shedding of various substrates:
Neuregulin processing: ADAM19 processes neuregulin-1 (NRG1) and neuregulin-3, critical ligands for ErbB receptor signaling in the nervous system
ErbB signaling modulation: Influences erbB2/erbB4 signaling through neuregulin release
Cell adhesion: Mediates cell-cell interactions through disintegrin domain interactions with integrins
Muscle development: Facilitates myoblast fusion during skeletal muscle development
The protein consists of:
Prodomain (regulates folding and catalytic activity)
[Hippocampus](/brain-regions/hippocampus): High expression in CA1 region and dentate gyrus
[Cortex](/brain-regions/cortex): Moderate expression across all layers
Cerebellum: Present in Purkinje cells
Substantia nigra: Detected in dopaminergic [neurons](/entities/neurons)
Olfactory bulb: High expression in granule cell layer
Disease Associations
Alzheimer's Disease
ADAM19 is implicated in Alzheimer's disease through neuregulin signaling pathways:
Synaptic function: Neuregulin-ErbB signaling is critical for synaptic plasticity, and ADAM19-mediated neuregulin processing modulates this pathway. Disrupted neuregulin signaling may contribute to synaptic dysfunction in AD.
Myelination: ADAM19 processes neuregulin-1 which regulates oligodendrocyte differentiation and myelination. Impaired myelination is observed in AD.
Neuronal survival: Neuregulin-ErbB signaling promotes neuronal survival, and ADAM19 modulation of this pathway may influence neurodegeneration.
Neuroinflammation: ADAM19 expression in [microglia](/cell-types/microglia-neuroinflammation) is modulated by inflammatory signals, potentially contributing to the neuroinflammatory environment in AD.
Research findings:
ADAM19 expression is altered in AD hippocampus
Neuregulin-1 levels are dysregulated in AD brains
ADAM19 genetic variants have been associated with AD risk in some populations
Parkinson's Disease
ADAM19 may contribute to Parkinson's disease pathogenesis: