Voltage-gated potassium channel subunit beta-1 (KCNAB1)

Cytoplasmic potassium channel subunit that modulates the characteristics of the channel-forming alpha-subunits (PubMed:7499366, PubMed:7603988, PubMed:17156368,PubMed:17540341, PubMed:19713757). Modulates action potentials via its effect on the pore-forming alpha subunits (By similarity).

Promotes expression of the pore-forming alpha subunits in the cell membrane, and thereby increases channel activity (By similarity). Mediates closure of delayed rectifier potassium channels by physically obstructing the pore via its N-terminal domain name and increases the speed of channel closure for other family members (PubMed:9763623).