Association of neuronal nitric oxide synthase (nNOS) with alpha1-syntrophin at the sarcolemma.
alpha1-syntrophin is a PDZ-containing dystrophin-associated protein, expressed predominantly in striated muscle and brain. alpha1-syntrophin null mice generated by gene targeting technique showed no overt muscular dystrophic phenotype. Though other dystrophin-associated proteins were localized at the sarcolemma, neuronal nitric oxide synthase (nNOS) was selectively lost from the membrane fraction but remained in the cytoplasm. Thus, the alpha1-syntrophin null mice are useful in the elucidation of the functional importance of nNOS targeting at the sarcolemma. In addition, the mice would facilitate identification of other signaling molecules, which are targeted to dystrophin complex via interaction with alpha1-syntrophin.
Miyagoe-Suzuki
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Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan.
Takeda
S I
SI
D000818:Animals; D002135:Calcium-Binding Proteins; D008565:Membrane Proteins / Q000032:analysis* / Q000502:physiology; D051379:Mice; D009119:Muscle Contraction; D009124:Muscle Proteins / Q000032:analysis* / Q000502:physiology; D018482:Muscle, Skeletal / Q000098:blood supply / Q000737:chemistry; D009136:Muscular Dystrophies / Q000378:metabolism; D009569:Nitric Oxide / Q000502:physiology; D019001:Nitric Oxide Synthase / Q000032:analysis* / Q000502:physiology; D052248:Nitric Oxide Synthase Type I; D012508:Sarcolemma / Q000737:chemistry*
D002135:Calcium-Binding Proteins; D008565:Membrane Proteins; D009124:Muscle Proteins; C091825:syntrophin alpha1; D009569:Nitric Oxide; D019001:Nitric Oxide Synthase; D052248:Nitric Oxide Synthase Type I; C496321:Nos1 protein, mouse