Influence of oxygenated fuel additives and their metabolites on the binding of a convulsant ligand of the γ-aminobutyric acidA (GABAA) receptor in rat brain membrane preparations

2002 ◽  
Vol 129 (3) ◽  
pp. 219-226 ◽  
Author(s):  
Joseph V Martin ◽  
Nesli M Bilgin ◽  
M.Michael Iba
2002 ◽  
Vol 364 (2) ◽  
pp. 343-347 ◽  
Author(s):  
Gareth J.O. EVANS ◽  
Alan MORGAN

The secretory vesicle cysteine string proteins (CSPs) are members of the DnaJ family of chaperones, and function at late stages of Ca2+-regulated exocytosis by an unknown mechanism. To determine novel binding partners of CSPs, we employed a pull-down strategy from purified rat brain membrane or cytosolic proteins using recombinant hexahistidine-tagged (His6-)CSP. Western blotting of the CSP-binding proteins identified synaptotagmin I to be a putative binding partner. Furthermore, pull-down assays using cAMP-dependent protein kinase (PKA)-phosphorylated CSP recovered significantly less synaptotagmin. Complexes containing CSP and synaptotagmin were immunoprecipitated from rat brain membranes, further suggesting that these proteins interact in vivo. Binding assays in vitro using recombinant proteins confirmed a direct interaction between the two proteins and demonstrated that the PKA-phosphorylated form of CSP binds synaptotagmin with approximately an order of magnitude lower affinity than the non-phosphorylated form. Genetic studies have implicated each of these proteins in the Ca2+-dependency of exocytosis and, since CSP does not bind Ca2+, this novel interaction might explain the Ca2+-dependent actions of CSP.


1979 ◽  
Vol 168 (1) ◽  
pp. 119-132 ◽  
Author(s):  
K.G. Haglid ◽  
A.N. Barclay ◽  
A. Hamberger ◽  
B. Hedquist ◽  
B. Nystro¨m ◽  
...  

1990 ◽  
Vol 22 (4) ◽  
pp. 335-339 ◽  
Author(s):  
J.Blanche O'Neill ◽  
H. Jaffe ◽  
P.L. Hallberg ◽  
J.M. Buzy ◽  
T. Kingan ◽  
...  

Life Sciences ◽  
1980 ◽  
Vol 26 (16) ◽  
pp. 1293-1302 ◽  
Author(s):  
David A. Kendall ◽  
John W. Ferkany ◽  
S.J. Enna
Keyword(s):  

1990 ◽  
Vol 44 (1) ◽  
pp. 141-142
Author(s):  
Ken'ichi Osada ◽  
Mikio Asakura ◽  
Makiko Shibata ◽  
Tohru Tsukamoto ◽  
Jun Imafuku ◽  
...  

1998 ◽  
Vol 357 (4) ◽  
pp. 401-407 ◽  
Author(s):  
Giovanna Schmid ◽  
Roberta Sala ◽  
Giambattista Bonanno ◽  
M. Raiteri

1987 ◽  
Vol 136 (3) ◽  
pp. 451-453 ◽  
Author(s):  
Javier Vitorica ◽  
Dongeun Park ◽  
Angel L. De Blas

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