Anti-Brp Monoclonal antibody, clone nc82

Bruchpilot (BRP) is a crucial protein identified in the fruit fly (Drosophila melanogaster), primarily associated with synaptic functions in neurons. BRP is approximately a 200 kDa protein and is part of the CAST/ERC protein family, sharing structural characteristics with human synaptic proteins ELKS/CAST. It is encoded by the bruchpilot gene, located on the second chromosome of the fruit fly. Mutations in this gene can result in various physiological defects, including reduced motor abilities and synaptic dysfunction, which justify its name "bruchpilot" (meaning "crash pilot"). Studying BRP not only aids in understanding the fundamental biology of the fruit fly's nervous system but also provides significant insights into the roles of similar proteins in the human nervous system. These studies may have potential applications in understanding neurological diseases and synapse-related pathologies.

A synapse includes a presynaptic active area and an adjunct postsynaptic density (PSD). The PSD contains signal-receiving and signal-integration systems, but most essential are neurotransmitter receptors. Presynaptic active zone morphologically refers to the location of synaptic vesicle docking and fusion, and physiologically to the location of neurotransmitter release. Three things are common to active zones: (1) the vesicle-fusion location, which is the plasma membrane just past the PSD; (2) a cell matrix very close to the plasma membrane, on which synaptic vesicles dock; and (3) electron-dense projections extending from the cell matrix into the cytoplasm for interaction with synaptic vesicles.

BRP plays a crucial role in the active zone (AZ) of synapses. It is responsible for forming the T-bar structure, a significant electron-dense area involved in neurotransmitter release. Specifically, the functions of BRP include:

• Calcium Channel Aggregation: BRP facilitates the clustering of calcium channels beneath the T-bar density by directly interacting with them, which is essential for efficient neurotransmitter release.
• Maintaining Synaptic Structure: Synapses lacking BRP exhibit a loss of the T-bar, affecting neurotransmitter release and short-term synaptic plasticity.
• Expression During Development: The transcription of the BRP gene occurs in synchronization with neuronal differentiation during the development of fruit flies, indicating that BRP also plays an important role in nervous system development.

Figure 1. Analysis of AZ organization at Drosophila NMJ synapses
(Source: Wichmann C, et al. 2010)

Anti-Bruchpilot Monoclonal antibody