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'Ca2 + ATPase' in keywords Facet   Publication Year 1984  [X]
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1Author    N. Ald, J. Scales, StefanR H IghsmRequires cookie*
 Abstract    lec tr o n M ic r o sc o p ic E vid en ce fo r th e T ran sm em b ran e D isp la ce m e n t o f C alcium A T P a se Incubation o f the Ca2+-ATPase in vanadate solutions leads to the formation o f two-dim ensional arrays in the sarcoplasmic reticulum membrane. Electron micrographic freeze fracture replicas show depressions on the inner leaflet for the first time. This indicates that the ATPase has moved perpendicular to the plane o f the m embrane. Our results also suggest that aggregation o f the Ca2+-ATPase into the two-dim ensional arrays occurs before they move into the membrane. These phenom ena were observed as soon as 15 minutes after vanadate was added. The effects o f vanadate appear to be com pletely reversible. When SR was incubated in the vanadate solutions and was then diluted into a buffer containing Ca2+ and ATP, the ATPase activity was normal for up to several hours o f incubation and only somewhat reduced after 3 days. 
  Reference    Z. Naturforsch. 39c, 177 (1984); received May 30/Septem ber 29 1983 
  Published    1984 
  Keywords    Sarcoplasmic Reticulum, Ca2+-ATPase, Ion Transport, Vanadate 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0177_n.pdf 
 Identifier    ZNC-1984-39c-0177_n 
 Volume    39