Protein kinase AMP-activated catalytic subunit alpha 2 (PRKAA2) (PRKAA2)

Protein kinase AMP-activated catalytic subunit alpha 2 (PRKAA2) is a key catalytic component of the AMP-activated protein kinase (AMPK) heterotrimer, a central energy sensor that maintains cellular energy homeostasis (UniProt P54646). It is primarily expressed in skeletal muscle, heart, and liver, where it responds to metabolic stress and an increased AMP:ATP ratio by activating pathways that generate ATP while inhibiting those that consume it (NCBI Gene 5563). PRKAA2 plays a pivotal role in regulating glucose uptake, fatty acid oxidation, and insulin sensitivity, making it a high-priority therapeutic target for metabolic diseases such as type 2 diabetes and obesity (PubMed 29107046). In addition to metabolic regulation, PRKAA2 influences cell growth, protein synthesis, and autophagy through the inhibition of the mTOR pathway, which has implications for cancer therapy and cardiovascular health (PubMed 24553120). While traditional therapies like metformin indirectly influence AMPK activity, modern drug development focuses on direct small-molecule activators that bind to the AMPK complex to achieve more targeted metabolic effects (DrugBank DB00157). However, therapeutic development must carefully manage potential safety concerns, such as the risk of cardiac hypertrophy associated with chronic AMPK overactivation.

Other names

AMPK alpha 2AMPK2PRKAAAMP-activated protein kinase alpha-2 subunitACACA kinase

Direct or indirect activation of the AMPK complex to stimulate catabolic pathways and inhibit anabolic processes.