The movement of a B cell receptor (BCR) from the plasma membrane to the inside of the cell, which results in positive regulation of toll-like receptor 9 (TLR9) signaling. For example, internalized BCR signals to recruit TLR9 from multiple small endosomes to large autophagosome-like compartments to enhance TLR9 signaling.
positive regulation of TLR9 signaling pathway by B cell receptor internalization