Anti-Rab3A Antibody Picoband® Fluoro550 Conjugated

Ras-related protein Rab-3A is a protein that in humans is encoded by the RAB3A gene. This gene is mapped to 19p13.11. Synapsin I stimulated the RAB3A cycle by increasing GTP binding, GTPase activity, and RAB3A recruitment to the synaptic vesicle membrane. Conversely, RAB3A inhibited synapsin I binding to actin and synapsin I-induced synaptic vesicle clustering. It has been found that RAB3A was necessary for both forms of synaptic plasticity, and it is also involved in calcium exocytosis in neurons. In addition to that, RAB3A has been found to regulate a late step in synaptic vesicle fusion.

A synthetic peptide corresponding to a sequence at the C-terminus of human Rab3A, different from the related mouse and rat sequences by two amino acids.

Involved in exocytosis by regulating a late step in synaptic vesicle fusion. Could play a role in neurotransmitter release by regulating membrane flow in the nerve terminal.

1. Giovedi, S., Darchen, F., Valtorta, F., Greengard, P., Benfenati, F. Synapsin is a novel Rab3 effector protein on small synaptic vesicles. II. Functional effects of the Rab3A-synapsin I interaction. J. Biol. Chem. 279: 43769-43779, 2004. 2. Huang, Y.-Y., Zakharenko, S. S., Schoch, S., Kaeser, P. S., Janz, R., Sudhof, T. C., Siegelbaum, S. A., Kandel, E. R. Genetic evidence for a protein-kinase-A-mediated presynaptic component in NMDA-receptor-dependent forms of long-term synaptic potentiation. Proc. Nat. Acad. Sci. 102: 9365-9370, 2005. 3. Rousseau-Merck M, Zahraoui A, Bernheim A, Touchot N, Miglierina R, Tavitian A et al. (January 1990) . Chromosome mapping of the human ras-related rab3A gene to 19p13.2. Genomics 5 (4) : 694–8.