Regulatory subunit of the probable trimeric SNF1-related protein kinase (SnRK) complex, which may play a role in a signal transduction cascade regulating gene expression and carbohydrate metabolism in higher plants. Subunit of a probable heterotrimeric complex consisting of an alpha catalytic (KIN10 or KIN11) subunit, and a beta (KINB) and a gamma (KING or SNF4) non-catalytic regulatory subunits (PubMed:17028154, PubMed:25736509). Interacts with KIN10, KIN11 and SNF4. Interacts with FLZ1, FLZ2, FLZ3, FLZ4, FLZ5, FLZ7, FLZ8, FLZ10, FLZ13, FLZ14, FLZ15 and FLZ16 (PubMed:29945970). Expressed in rosette (at the protein level). Expressed in the whole plant and at the different developmental stage with a higher level in stems. Kinase-interacting sequence (KIS) is specific for the alpha catalytic subunit interaction and Association with SNF1 Complex (ASC) is specific for the gamma non-catalytic regulatory subunit interaction. Belongs to the 5'-AMP-activated protein kinase beta subunit family. Presents a truncated kinase-interacting sequence (KIS).