Localization of N-ethylmaleimide-sensitive fusion protein in pinealocytes

Yoshinori Moriyama, Akitsugu Yamamoto, Mitsuo Tagaya, Yutaka Tashiro, Hitoshi Michibata

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


N-ETHYLMALElMiDE-sensitive fusion protein (NSF), a protein necessary for vesicular docking and/or fusion, was detected immunohistochemically in pinealocytes. NSF was distributed similarly to synaptophysin and vacuolar-type H+-ATPase (V-ATPase), marker proteins for synaptic-like microvesicles (MVs) abundantly present in pinealocytes. A subcellular fractionation study indicated that >95% of NSF was present as a membrane-bound form and that some NSF was associated with MVs. Like neuronal NSF, the protein was not solubilized from membranes with either 2mM Mg-ATP or 2% sodium carbonate, suggesting that NSF was tightly bound to the membranes. NSF was also detected in purified MVs from bovine posterior pituitaries. Since MVs are the organelles in which transmitters are stored, these results suggest that NSF is involved in the MV-mediated exocytosis of transmitters from endocrine cells.

Original languageEnglish
Pages (from-to)1757-1760
Number of pages4
Issue number13
Publication statusPublished - Sept 1995
Externally publishedYes


  • Chemical transduction
  • Chromaffin granules
  • Exocytosis
  • Micro-vesicles
  • NEM-sensitive fusion protein (NSF)
  • Pineal gland
  • Pinealocytes
  • Posterior pituitary
  • Synaptic vesicles
  • Vesicular transport

ASJC Scopus subject areas

  • General Neuroscience


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