Any process that activates or increases the frequency, rate or extent of signal transduction mediated by the ERK5 cascade.
Synonyms:
exact_synonym:
positive regulation of BMK cascade; positive regulation of BMK signaling pathway; positive regulation of BMK signalling pathway; positive regulation of BMK1 cascade; positive regulation of ERK5 signaling pathway; positive regulation of MAPK7 cascade; up regulation of BMK cascade; upregulation of BMK cascade
narrow_synonym:
activation of BMK cascade; stimulation of BMK cascade