Редактирование: VAMP4

Vesicle-associated membrane protein 4 (VAMP-4)

==Publications==

{{medline-entry
|title=Syntaxin6 separates from GM1a-rich membrane microdomain during granule maturation.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/17459336
|abstract=Since it was reported that components of immature secretory granules (ISGs) are different from those of mature secretory granules (MSGs) in rat parotid acinar cells, we have been considering that components of secretory granules (SGs) change dynamically during granule maturation. As the first step to understand the mechanism of granule maturation, we separated low-density detergent-resistant membrane fractions (DRMs) from purified SGs of rat parotid gland. When SGs were lysed by the detergent Brij-58, syntaxin6 and [[VAMP4]] were found in DRMs that were different from the GM1a-rich DRMs containing [[VAMP2]]. Because syntaxin6 and [[VAMP4]] are known to be related to granule formation, we attempted to separate DRMs from ISGs. To enrich for ISGs, glands were removed from rats 5h after intraperitoneal injection of isoproterenol and used to purify the newly synthesized granules. Compared to mature granules prepared without injection, these newly formed granules were lower in density and contained higher concentrations of syntaxin6, [[VAMP4]], and gamma-adaptin. This composition is consistent with the characterizations of ISGs. DRMs isolated from the newly formed granules were GM1a-rich and contained syntaxin6, [[VAMP4]], and [[VAMP2]] together. Thus, our findings suggest that syntaxin6 and [[VAMP4]] associate with a GM1a-rich membrane microdomain during granule formation but enter a separate membrane microdomain before transport from granules during maturation.
|mesh-terms=* Aging
* Animals
* Cells, Cultured
* G(M1) Ganglioside
* Membrane Microdomains
* Parotid Gland
* Qa-SNARE Proteins
* Rats
* Secretory Vesicles

|full-text-url=https://sci-hub.do/10.1016/j.bbrc.2007.04.053
}}