@article{WalzZimmermannSeidl1994, author = {Walz, Bernd and Zimmermann, Bernhard and Seidl, Siegfried}, title = {Intracellular Ca2+ concentration and latency of light-induced Ca2+ changes in photoreceptors of the honeybee drone}, year = {1994}, language = {en} } @article{WalzBaumannZimmermannetal.1995, author = {Walz, Bernd and Baumann, Otto and Zimmermann, Bernhard and Ciriacy-Wantrup, E.v.}, title = {Caffeine- and ryanodine-sensitive Ca2+-induced Ca2+ release from the endo plasmatic reticulum in honeybee photoreceptors}, year = {1995}, language = {en} } @article{ZimmermannWalz1997, author = {Zimmermann, Bernhard and Walz, Bernd}, title = {Serotonin-induced intercellular calcium waves in salivary glands of the blowfley Calliphora erythrocephala}, year = {1997}, language = {en} } @article{Zimmermann1998, author = {Zimmermann, Bernhard}, title = {Calcium store depletion activates two distinct calcium entry pathways in secretory cells of the blowfly salivary gland}, year = {1998}, language = {en} } @article{ZimmermannWalz1999, author = {Zimmermann, Bernhard and Walz, Bernd}, title = {The mechanism mediating regenerative intercellular Ca2+ waves in the blowfly salivary gland}, year = {1999}, language = {en} } @article{WalzUkhanovZimmermann2000, author = {Walz, Bernd and Ukhanov, Kyrill and Zimmermann, Bernhard}, title = {Actions of neomycin on electrical light responses : Ca2+ release and intracellular Ca2+ changes in photoreceptors of the honeybee drone}, issn = {0340-7594}, year = {2000}, language = {en} } @article{Zimmermann2000, author = {Zimmermann, Bernhard}, title = {Control of insP(3)-induced Ca2+ oscillations in permeabilized blowfly salivary gland cells : contribution of mitochondria}, issn = {0022-3751}, year = {2000}, language = {en} } @article{Zimmermann2000, author = {Zimmermann, Bernhard}, title = {Subcellular organization of agonist-evoked Ca2+ waves in the blowfly salivary gland}, year = {2000}, language = {en} } @article{ZimmermannDamesWalzetal.2003, author = {Zimmermann, Bernhard and Dames, Petra and Walz, Bernd and Baumann, Otto}, title = {Distribution and serotonin-induced activation of vacuolar-type H+-ATPase in the salivary glands of the blowfly Calliphora vicina}, year = {2003}, language = {en} } @article{DamesZimmermannSchmidtetal.2006, author = {Dames, Petra and Zimmermann, Bernhard and Schmidt, Ruth and Rein, Julia and Voss, Martin and Schewe, Bettina and Walz, Bernd and Baumann, Otto}, title = {cAMP regulates plasma membrane vacuolar-type H+-ATPase assembly and activity in blowfly salivary glands}, issn = {0027-8424}, doi = {10.1073/pnas.0600011103}, year = {2006}, abstract = {Reversible assembly of the V0V1 holoenzyme from V-0 and V-1 subcomplexes is a widely used mechanism for regulation of vacuolar-type H+-ATPases (V-ATPases) in animal cells. in the blowfly (Calliphora vicina) salivary gland, V- ATPase is located in the apical membrane of the secretory cells and energizes the secretion of a KCl-rich saliva in response to the hormone serotonin. We have examined whether the CAMP pathway, known to be activated by serotonin, controls V-ATPase assembly and activity. Fluorescence measurements of pH changes at the luminal surface of isolated glands demonstrate that CAMP, Sp-adenosine-3',5'-cyclic monophosphorothioate, or forskolin, similar to serotonin, cause V-ATPase-dependent luminal acidification. In addition, V-ATPase-dependent ATP hydrolysis increases upon treatment with these agents. Immunofluorescence microscopy and pelleting assays have demonstrated further that V, components become translocated from the cytoplasm to the apical membrane and V-ATPase holoenzymes are assembled at the apical membrane during conditions that increase intracellular cAMP. Because these actions occur without a change in cytosolic Ca2+, our findings suggest that the cAMP pathway mediates the reversible assembly and activation of V-ATPase molecules at the apical membrane upon hormonal stimulus}, language = {en} }