Number of glutamate molecules in synaptic vesicle in brain cortex

Value 3640 molecules/vesicle
Organism Rat Rattus norvegicus
Reference Riveros N, Fiedler J, Lagos N, Muñoz C, Orrego F. Glutamate in rat brain cortex synaptic vesicles: influence of the vesicle isolation procedure. Brain Res. 1986 Oct 29 386(1-2):405-8. abstract and p.407 right column bottom paragraphPubMed ID2877717
Method (Ref abstract:) "A slightly modified Kadota and Kadota procedure (J. Cell Biol., 58 (1973) 135 PMID 4125368) gave synaptic vesicles of a very high purity that were filtered on a Sepharose 4B column, and there, the synaptic vesicle fraction of highest purity was estimated to contain 3640 glutamate molecules in each glutamatergic vesicle."
Comments "Therefore, if one assumes that 30% of all the SVs [synaptic vesicles] present operate with glutamate as a transmitter, this would raise the number of glutamate molecules/ SV to 3640, that is quite close to the estimated quantum size of 6000 ACh molecules in cholinergic motor nerve endings (Kuffler et al., 1975 PMID 171380)."
Entered by Uri M
ID 108622