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Articles by N Matsuda
Total Records ( 4 ) for N Matsuda
  N Matsuda and N. Sasamoto

Semi-empirical formulas for the duct streaming of gamma rays are useful as ever for application to practical shielding designs. Based on the algorithm of the DIN's formula, a new semi-empirical formula has been developed. Major improvements are the re-definition of the duct leg region, introduction of the gamma-ray energy-dependent total dose albedo and formulation for the bend duct with arbitrary flexion angles. Validity of the formula was verified through benchmark analyses of gamma-ray streaming through three-legged duct with rectangular bend and the one with the flexion angle of 137°.

  J Noritake , Y Fukata , T Iwanaga , N Hosomi , R Tsutsumi , N Matsuda , H Tani , H Iwanari , Y Mochizuki , T Kodama , Y Matsuura , D. S Bredt , T Hamakubo and M. Fukata

Protein palmitoylation is the most common posttranslational lipid modification; its reversibility mediates protein shuttling between intracellular compartments. A large family of DHHC (Asp-His-His-Cys) proteins has emerged as protein palmitoyl acyltransferases (PATs). However, mechanisms that regulate these PATs in a physiological context remain unknown. In this study, we efficiently monitored the dynamic palmitate cycling on synaptic scaffold PSD-95. We found that blocking synaptic activity rapidly induces PSD-95 palmitoylation and mediates synaptic clustering of PSD-95 and associated AMPA (-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid)-type glutamate receptors. A dendritically localized DHHC2 but not the Golgi-resident DHHC3 mediates this activity-sensitive palmitoylation. Upon activity blockade, DHHC2 translocates to the postsynaptic density to transduce this effect. These data demonstrate that individual DHHC members are differentially regulated and that dynamic recruitment of protein palmitoylation machinery enables compartmentalized regulation of protein trafficking in response to extracellular signals.

  N Matsuda , S Sato , K Shiba , K Okatsu , K Saisho , C. A Gautier , Y. s Sou , S Saiki , S Kawajiri , F Sato , M Kimura , M Komatsu , N Hattori and K. Tanaka

Defective mitochondrial quality control is shown to be a mechanism for neurodegeneration in some forms of Parkinson's disease.

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